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Radyne OM20 Installation And Operation Manual
Summary of OM20
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Part number mn-om20 revision 5 important note: the information contained in this document supersedes all previously published information regarding this product. This manual is subject to change without prior notice. Om20 universal outdoor modem installation and operation manual.
Page 3: Om20
Copyright © 2009 comtech ef data. All rights reserved. Printed in the usa. Comtech ef data, 2114 west 7th street, tempe, arizona 85281 usa, 480.333.2200, fax: 480.333.2161 om20 universal outdoor modem installation and operation manual part number mn-om20 revision 5 october 27, 2009.
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Page 5: Table Of Contents
Iii table of contents table of contents ............................................................................................................................................. Iii chapter 1. Introduction .............................................................................................
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Table of contents revision 5 om20 universal outdoor modem mn-om20 iv 4.5 i nternal c lock ........................................................................................................................................... 4–8 4.6 l oopback f eatures (t errestrial & if) .........................
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Table of contents revision 5 om20 universal outdoor modem mn-om20 v 5.1.11 led indicators .................................................................................................................................. 5–8 5.1.12 g.703 balanced – connections are available via the j3 connector. Ref...
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Table of contents revision 5 om20 universal outdoor modem mn-om20 vi chapter 8. Technical specifications ..................................................................................................... 8–1 8.1 d ata r ates ...........................................................................
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Table of contents revision 5 om20 universal outdoor modem mn-om20 vii c.5 c arrier vs at ..............................................................................................................................................C–2 c.6 c arrier rts ...................................................
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Table of contents revision 5 om20 universal outdoor modem mn-om20 viii h.1.1 radyne aupc ...................................................................................................................................... H–1 h.1.2 ef aupc..............................................................
Page 11: Preface
I preface about this manual this manual describes the installation and operation for the radyne om20. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the om20. Reporting comments or suggestions concerning ...
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Om20 universal outdoor modem revision 5 preface mn-om20 ii cautions and warnings trademarks product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. Important important or note indicates a statement associated with t...
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Om20 universal outdoor modem revision 5 preface mn-om20 iii safety compliance en 60950 applicable testing is routinely performed as a condition of manufacturing on all units to ensure compliance with safety requirements of en60950.This equipment meets the safety of information technology equipment s...
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Om20 universal outdoor modem revision 5 preface mn-om20 iv warranty policy comtech ef data products are warranted against defects in material and workmanship for a period of two years from the date of shipment. During the warranty period, comtech ef data will, at its option, repair or replace produc...
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Om20 universal outdoor modem revision 5 preface mn-om20 v the warranty excludes any responsibility by comtech ef data corporation for incidental or consequential damages arising from the use of the equipment or products, or for any inability to use them either separate from or in combination with an...
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Om20 universal outdoor modem revision 5 preface mn-om20 vi customer support contact the comtech ef data customer support department for: • product support or training • reporting comments or suggestions concerning manuals • information on upgrading or returning a product a customer support represent...
Page 17: Chapter 1.
Mn-om20– revision 5 1–1 chapter 1. Introduction this chapter provides an overview of the om20 outdoor modem. The om20 system can support a c-band with power levels of 2, 5 and 10 watts or ku-band with output powers of 2, 4 and 8 watts. Figure 1.1. Outdoor modem (om20) without protective shroud 1.0 o...
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Om20 universal outdoor modem introduction mn-om20– revision 5 1–2 the om20 supplies dc voltage and 10 mhz reference to the buc and lnb via the if cables. The output from the tx port (j8) consists of the l-band output frequency, high-stability 10 mhz reference, and an optional 24 or 48 volts to the b...
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Om20 universal outdoor modem introduction mn-om20– revision 5 1–3 1.1.1 features/options installed at time of order features installed at the time of ordering are the options pre-installed/initialized in the factory prior to shipment. Features and options can be reviewed from the gui or remote port ...
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Om20 universal outdoor modem introduction mn-om20– revision 5 1–4 notes:.
Page 21: Chapter 2.
Mn-om20– revision 5 2–1 chapter 2. Installation this document provides unpacking and installation instructions, and a description of external connections. 2.1 installation requirements the om20 is designed to be easily installed on antenna offset feed struts or king posts. It requires standard uni-s...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–2 caution the om20 contains a lithium battery . Danger of explosion exists if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries in accordance wi...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–3 2.3 removal and assembly the standard om20 is shipped in a single box that contains mating connectors. Carefully unpack the unit and ensure that all of the above items are in the carton. The standard om20 power supply is designed for ...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–4 figure 2.2a. Om 20 rear interconnects (cont) 2.4 mounting and wiring considerations the om20 should be mounted with the buc higher than the om20 with the interconnecting communication cabling and power cords at the lowest possible pos...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–5 2.4.1 om20 mounting bracket instructions mount the om20 to the desired location at the antenna using the supplied brackets. Each brackets has two threaded holes 3/8 x 16 as shown in figure 2-4 below. Figure 2.4. Om20 mounting brackets.
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Om20 universal outdoor modem installation mn-om20– revision 5 2–6 2.4.2 om20 general antenna post mount diagram the om20 and buc can be mounted vertically on the antenna king post. This is the preferred method of mounting on smaller diameter antenna systems where sufficient support of the feed boom ...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–7 2.4.3 om20 general antenna post mount diagram the om20 can be mounted on the antenna king post and the buc on the offset feed arm. System is shown with the ethernet interface allowing for data and m&c functions. Ac pwr data / m & c in...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–8 2.4.4 om20 antenna feed arm mount diagram the om20 can be mounted horizontally on the antenna feed arm. This is the preferred method of mounting on larger diameter antenna systems where sufficient support and weight handling character...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–9 2.4.5 om20 with external twta amplifier the om20 can be used as a driver for an external sspa/twta high power amplifier for systems requiring higher output rf power levels. Ac pwr data / m & c interface enet data / m & c i / o ifl ind...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–10 2.4.6 om20 additional interface diagrams figure 2-9. Om20 eia-530 interface figure 2-10. Om20 g.703 interface l n b omt ac pwr data / m & c interface m & c i / o eia - 530 data / m & c i / o enet data / m & c i / o g . 703 data tx g ...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–11 figure 2-11. Om20 asi interface l n b omt ac pwr data / m & c interface m & c i / o eia - 530 data / m & c i / o enet data / m & c i / o asi data tx asi data rx ifl indoor outdoor om- 20 j 7 rx input j 8 tx out ac pwr j 1 j 2 m & c i...
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Om20 universal outdoor modem installation mn-om20– revision 5 2–12 notes:.
Page 33: Chapter 3.
Mn-om20– revision 5 3–1 chapter 3. Om20 initial configuration 3.1 om20 initial configuration check the om20 is shipped from the factory with preset factory defaults. Upon initial power-up, a user check should be performed to verify the shipped modem configuration. Caution the correct om20 interface ...
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Om20 universal outdoor modem om20 initial configuration mn-om20– revision 5 3–2 standard om20 factory default configuration settings modulator: data rate: 2.048 mbps mode: closed network satellite framing: none scrambler: v.35 (iess) drop and insert: disabled inner fec: 1/2 rate viterbi outer fec: d...
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Om20 universal outdoor modem om20 initial configuration mn-om20– revision 5 3–3 3.2 initial configuration and setup process the following descriptions assume that the om20 is installed in a suitable location with prime ac power and supporting equipment available. Caution before initial power up of t...
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Om20 universal outdoor modem om20 initial configuration mn-om20– revision 5 3–4 important resetting ip address & terminal to default/reset mode if the unit should lockup or lose communication during the initialization process, the unit remote interface can be reset using the supplied reset mating co...
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Om20 universal outdoor modem om20 initial configuration mn-om20– revision 5 3–5 3.3.2 rx input verification test connect a spectrum analyzer and bias-t to the rxrf l-band output of the lnb. Ensure that the antenna is correctly tuned and that the carrier of interest is visible and that the frequency ...
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Om20 universal outdoor modem om20 initial configuration mn-om20– revision 5 3–6 notes:.
Page 39: Chapter 4.
Mn-om20– revision 5 4–1 chapter 4. Om20 theory of operation 4.1 om20 hardware the om20 outdoor modem is based on the dmd20 modem product platform that consists of a two printed circuit card (minimum configuration) design with additional optioned printed circuit cards available for additional feature...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–2 4.1.1 om20 l-band printed circuit card the l-band printed circuit card consists of an analog modulation function, an analog complex downconversion, and two wide-band digital synthesizers. The block diagram of the l-band as...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–3 4.1.2 om20 baseband processing printed circuit card the advent of million-plus gate count fpgas, advanced logic synthesis tools, and dsps providing hundreds of mips enabled the design of a software configurable modem. Larg...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–4 4.2 om20 functional block diagram figure 4-3 represents the om20 functional blocks. The modem is shown in a typical application with customer data, tx/rx rf equipment, and antenna i/o. Figure 4-3. Om20 outdoor modem functi...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–5 4.2.2 tx baseband processing the tx data and clock enters the baseband processor, passes through a rate adapting fifo, and enters the framer/drop processor. In closed-net mode, the data passes through the framer unaltered....
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–6 4.3 monitor & control (m&c) subsystem the modems m&c system is connected to most of the circuitry on any board contained in the modem. These connections provide status on the working condition of the circuitry as well as p...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–7 4.3.1 terminal port this port supports an asynchronous control protocol as described in section 4. It is configured to support rs-232 signal levels. This port is intended for use in computer-based remote m&c. All functions...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–8 4.3.4 modem monitor status the modems m&c system is connected to most of the circuitry on any board contained in the chassis. These connections provide status on the working condition of the circuitry as well as providing ...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–9 tx baseband loopback - tx data port is looped back to the rx data port after the interface driver/receiver. (after the framing unit) rx terrestrial loopback - receive data from the satellite is looped back for retransmissi...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–10 figure 4-4. Loopback functional block diagram.
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–11 figure 4-5. Loopback functional block diagram figure 4-6. Loopback functional block diagram.
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–12 4.7 clocking options the modem supports a number of different clocking options that can be recovered from the satellite or the terrestrial links. The various clocking options allow users to determine which clock will best...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–13 the following paragraphs define the types of clocking options available to the user at the front panel. Sct (internal oscillator) scte (external tx terrestrial clock) rx satellite clock 4.7.1.1 scte: serial clock transmit...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–14 sct (internal oscillator) exc clock/ext bnc (external clock source) ext idi (drop and insert) the modem handles rx buffer clock selections based on source priority levels. The user assigns priorities to the clock sources ...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–15 4.7.3 ext ref: external reference, optional the external clock connector is optional and must be requested at time of order. This is not actually a clock, but does have some clocking implications. When the external refere...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–16 4.9 reed-solomon codec utilizing a reed-solomon (r-s) outer codec concatenated with a convolutional inner codec is an effective way to produce very low error rates even for poor signal-to-noise ratios while requiring only...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–17 figure 4-9 reed-solomon decoder functional block diagram table 4-1. Reed-solomon codes type of service data rate (kbps) r-s code (n, k, t) 1 bandwidth expansion [ (n/k) -1 ] interleaving depth maximum 2 r-s codec delay (m...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–18 4.11 om20 automatic uplink power control (aupc operation) refer to appendix f 4.12 asynchronous overhead operation j3 (framing/multiplexer capability) the asynchronous framing/multiplexer is capable of multiplexing a rela...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–19 1536 768 576 9600 1664 832 640 19200 1792 896 704 19200 1920 960 768 19200 1920 960 768 19200 2048 1024 832 19200 896 19200 960 19200 1024 19200 1088 19200 1152 19200 1216 19200 1280 19200 1344 19200 1408 19200 1472 19200...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–20 bit 2 frame alignment part of the frame alignment word. Bit 3 backward alarm transmit and receive with main processor to activate main alarm/led. Bit 4 multiframe message as per ibs. Bits 5 and 6 spare not currently utili...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–21 the ibs async mode must be selected for true asynchronous channel operation to be available. 4.15 esc backward alarms when running in idr mode and if the modem has the esc option, there will be four backward alarms availa...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–22 4.15.1 to disable the esc backward alarms if the esc alarms port will not be used and the backward alarm indications are to be disabled, you must connect pins 10, 11, 22 and 23 to pin 1 (gnd) on esc alarms port. 4.16 sate...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–23 figure 4-10. 1 to 1 control ratio diagram the control ratio of the receiving units must match the control ratio of the transmitting unit. 4.16.2 aggregate data rate the aggregate data rate equals the following: user data ...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–24 note: the maximum in-band rate is 115200. The async interface rate must be equal or greater in value. 4.16.3 overhead rate comparison the scc overhead ratio varies depending on the user data rate, the in-band rate, and th...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–25 example 1: user data rate: 1,024,000 bps in-band rate: 19,200 bps control ratio: 1 to 7 minimum in-band = (1,024,000 * 7)/((7 + 1) * 250) = 3,584 (less than in-band rate) slot bits = (1,024,000 * (7 * 10))/(19,200 * (7 + ...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–26 i. Es baud rate {150 - 115200} ii. This allows the user to select the baud rate of the async port (j17) in scc mode. 7. Under tx async mode menu, set the desired es bits/char: i. Es bits/char {7,8} ii. This allows the use...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–27 4.17 edmac satellite framing/deframing mode the modem supports edmac satellite framing. Edmac can be enables for both modulator and demodulator satellite framing when modem is configured in closed net applications. Edmac ...
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Om20 universal outdoor modem om20 theory of operation mn-om20– revision 5 4–28 notes:.
Page 67: Chapter 5.
Mn-om20– revision 5 5–1 chapter 5. Rear panel interfaces this section discusses the electrical interfaces available of the unit. 5.1 om20 external interface connections all om20 external connections are interconnected to labeled connectors located on the front of the unit. Any connection interfacing...
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–2 figure 5-1. Om20 front panel ports figure 5-1a. Om20 rear panel ports.
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–3 5.1.1 power input 5.1.1.1 ac power input (j1) ac input is located on connector j1 of the om20. The auto-ranging universal power supply input allows for the connection of ac power to the port between the range of 100 – 240 vac...
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–4 configuration is available on the om20 gui. Refer to table 5.3 for the remote/terminal connector pinout; and section 6 for the port interface specification. The om20’s internal m&c system is connected to most of the circuitry...
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–5 5.1.3 eia-530 synchronous data, es-es asynchronous overhead data, and g.703 balanced data i/o port (j3) this 38 pin d38999/24fd35pn connector contains the eia-530 data connections (rs- 422/v.35/rs-232, the es-es rs485 asynchr...
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–6 23 send timing b (+) st-b output 12 24 no connect --- --- 25 25 clear to send b (+) cs-b output 13 table 5.4.Cont. Eia-530 synchronous data i/o; es-es async data connector (j3) j3 pin no. Signal name signal direction eia-530 ...
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–7 use of an extended temperature cat-5 cable such as is recommended for the ethernet data/m&c interface. Cat 5e ethernet cable can support data rates up to 100 mhz (100 base-t), easily allowing for a 20 mbps modem data rate (th...
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Om20 universal outdoor modem rear panel interfaces mn-om20– revision 5 5–8 5.1.9 sd (j10) (optional) based on unit configuration, this connector is used for either g.703 unbalanced transmit send data (drop data in) or for asi data in depending on the optional interface ordered. The connector is a 75...
Page 75: Chapter 6.
Mn-om20– revision 5 6–1 chapter 6. Web browser/remote protocol 6.1 web browser user interface the web browser interface for om20 can be accessed through the rj45, snmp port located on the unit. Instructions on how to configure the interface for this application are discussed. The web browser menus f...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–2 figure 6-1. Web user interface 6.2.1 appearance this site is a monitor and control of an individual complete satellite terminal. With a front panel look and feel, and an appearance that resembles the dmd20 layout, the p...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–3 6.2.2 navigation the navigation scheme consists of gel tabs that correspond to the front panel top-level menu selections. When the mouse is dragged over a tab, it gets highlighted with a rollover effect and a sub-level ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–4 6 product information contact information access to technical trouble-shooting, product options and specifications is accomplished by selecting one and clicking on that function. Contact radyne via email by clicking on ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–5 6.3 gui screen menus there are four main menus displayed on the introduction screen upon startup of the web browser. This screen will give a brief overview of the product and contains no configurable items. The four mai...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–6 6.3.1 introduction menu this menu will first appear when starting up the web browser. This page lists the general features of the unit, and lists a brief description of the unit. Notice on the bottom of the page that th...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–7 6.3.1.1 login screen upon initially accessing the password setup, ip administration and monitor & control configuration menu tabs a login prompt will appear. In order to gain access to any of the configuration menus, lo...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–8 6.3.2 password setup the access menu allows for multiple operators to be allowed access to the system. User access priorities can be set be completing the fields in the access menu below. Access menu figure 6-4. Access ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–9 preferences menu figure 6-5. Modem preferences menu user confirmation: {disabled, enabled} the user confirmation preference allows the user to force/disable confirmation of all changes through the web interface. This do...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–10 6.3.3 ip and application administration the modem addressing menu provides instructions on how to configure the modem, applications and pc. 6.3.3.1 modem addressing figure 6-6. Modem addressing server boot mode: {defau...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–11 ip test: the ip test boot mode has a similar behavior to the default boot mode. The terminal, ip, snmp, ftp and web parameters changed by the default setting will also be reset by the ip test boot mode. However, instea...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–12 6.3.3.2 configuring applications figure 6-7. Configuring applications snmp setup: snmp version: {v1 & 2, v3} default = v1 & v2 trap version: {v1 & 2} default = v1 authorization: {traps on, traps off} default = traps of...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–13 snmp snmp version: v1 & v2 trap version: v1 authorization: traps off rd community: public rdwr community: public user 1 viewer-md5 user 2 viewer-sha user 3 oper-md5 user 4 oper-sha access group viewer access group view...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–14 terminal and remote port type vt100 baud rate 19200 interface rs232 remote control terminal table 6-8. Terminal and remote port parameters non-vol: stores and uses ip mask and addresses as provided by the user. Bootp: ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–15 configuring the pc figure 6-8. Configuring the pc.
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–16 6.3.4 monitor and control menu under this menu, all modem functions that are monitored and/or controlled are accessible. To access the m&c sub menu options drag the cursor across the gel-tabs. Note that as the cursor p...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–17 additionally, data rates not covered by the given network specification of operation will not be allowed. If the mode of operation is selected after the data rate has been entered, then the data rate must be compatible...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–18 data rate inner code rate satellite framing scrambler drop and insert outer code rate (reed-solomon) modulation network spec frequency (mhz): allows the user to enter the modulator if output frequency of the modem in 1...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–19 data menu figure 6-10. Data menu data rate (bps): {refer to technical specs for data rates} allows the user to set the data rate in bps steps. Symbol rate (sps): allows the user to view the symbol rate. Inner fec viter...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–20 differential coding: {enabled, disable} allows the user to enable or disable the differential encoder. Having the encoder enabled ensures proper phase lock. May not be adjustable in some modes. Scrambler selection: {no...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–21 async inband rate: {75, 150, 300, 600. 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200} allows the user to select the async inband rate. {150 – 1024} for ibs es to es {150 – 19200} for es to es enhanced {150 – 1152...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–22 odu buc menu figure 6-12. Obu-buc menu lo frequency (mhz): allows the user to enter the local oscillator frequency of the buc lo in order for the uplink frequency to be displayed correctly (refer to the buc manufacture...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–23 frequency. If the buc lo is higher in frequency then the user must enter high sideband. 10 mhz buc reference: {enabled, disabled} allows the user to enable or disable the 10 mhz buc reference clock. Low alarm thrsh (vo...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–24 codan: enables the fsk communication link for codan bucs only. This feature enables the dmd20lbst to retrieve and display certain buc parameters on the front panel of the modem. Terrasat: enables the fsk communication ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–25 query for address the modem will initiate a fsk query requesting buc address. Pass thru: allows the user to communicate with the buc utilizing the bucs message protocol aupc menu these selections are visible only when ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–26 efdata: enables efdata local aupc function. In the event that the remote or local demodulator losses lock, the output power level will adjust itself to the level settings indicated in the 'remote cl action' menu or the...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–27 nearside: when configured for nearside aupc the maximum transmit power is the highest power setting that will be used by the local modem when the eb/no decreases below the eb/no target. Target eb/no {4.0 to 16 db} this...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–28 aupc mode {disable,near side, efdata} allows the user to enable or disable the aupc function of the remote modem. The remote aupc function is the response of the local modem to commands for an increase or decrease of t...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–30 spectrum mask: intelsat for data rates framing type: 1/15 (ibs) descrambler type: iess-309 spectrum mask: intelsat ibs: (iess-309) for data rates framing type: 1/15 (ibs) descrambler type: iess-309 spectrum mask: intel...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–31 downlink frequency (mhz): displays the input frequency into the lnb from the satellite, also referred known as satellite downlink frequency. The user must enter the lnb lo and osc sideband of the lnb before using this ...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–32 the maximum symbol rate for fast acquisition is 1028ksps. Limitations of fast acquisition: fast acquisition must be disabled for rates greater than 1028ksps. Only supports qpsk and 8psk in a non-dvb mode. Does not supp...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–33 data rate (bps): {refer to technical specs for data rates} allows the user to set the data rate in bps steps via the front panel arrows or keypad. Symbol rate (sps): allows the user to view the symbol rate. Inner fec v...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–34 (bpsk mode only) esc overhead {voice x2, data 64kbps} idr esc channel used for voice or 64 k data channel. Scc control ratio {1/1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/7} note: only available (visible) when scc is selected for t...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–35 reedsolomon control: {enabled, disabled} allows the user to enable/disable the reed-solomon encoder. Rs n value: {refer to table 3-1 for valid n/k values} displays the currently used n value, reed-solomon codes. In clo...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–36 allows the user to select the location of the lnb lo. The user must enter the location of the lnb lo in order for the uplink frequency to be displayed correctly. The lnb lo can be either higher or lower in frequency th...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–37 6.3.4.3 interface menu tx setup menu figure 4-18. Tx setup menu circuit id : allows the user entry of a tx circuit identifier. Circuits can be given up to an 11 character alphanumeric identity such as link1. Terrestria...
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Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–38 sct clock source: {sct, scr} allows the user to select sct source. Sct is the internally generated sct clock. Scr is the rx satellite clock. Scr us used for loop timing. Sct clock polarity: {auto, normal, inverted} all...
Page 113
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–39 es baud rate: {150 – 1024} for ibs es to es {150 – 19200} for es to es enhanced {150 – 115200} for scc communications es to es : fixed baud rate based on ibs network specification. Available rates are listed in table 3...
Page 114
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–40 rx setup menu figure 6-19. Rx setup menu circuit id: provides entry of rx circuit identifier. Circuits can be given up to an 11 character alphanumeric identity such as dlink1 terrestrial streaming: {byte output, packet...
Page 115
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–41 buffer clock control buffer size (msec): {0 - 64 msecs} allows the user to set the doppler buffer size in msec. Buffer clock polarity: {normal, inverted} allows the user to select the buffer clock polarity for the tx t...
Page 116
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–42 es to es enhanced: allows user to select the interface baud rate. This selection will allow the user to set rate as listed in table 3-3. Scc: allows user to select the interface baud rate. Interface rate must be equal ...
Page 117
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–43 general menu figure 6-20. General menu external frequency (mhz): {variable through data rate} allows the user to select the external clock frequency in mhz. Reference frequency source: {internal, external, high-stabili...
Page 119
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–45 corrected ber: the cber display shows an estimated corrected bit error rate of the modem. Depending on the symbol rate the modem is running, the high-end performance scale of this display will vary (10 e -9 , 10 -10 or...
Page 120
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–46 monitor eth link status menu figure 6-22. Eth link status menu total packets: displays the total number of ethernet packets received from the satellite (only visible when ethernet is selected as the interface type). Er...
Page 121
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–47 important the status of the following ports may be one of the following: down: the link is down. Unresolved: unable to agree on connection speed. 10 mbps half: connected at 10 base-t half duplex. 10 mbps full: connecte...
Page 122
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–48 event menu figure 6-23. Event menu delete all: cleans the entire event buffer. Event type: i informational y yellow alarm. Indicates a transmit or receive warning condition. R red alarm. Indicates a transmit or receive...
Page 123
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–49 6.3.4.5 alarms menu transmit menu figure 6-24. Transmit menu major alarms fpga config: {pass/fail, unmasked/masked} indicates a transmit fpga configuration failure. Dsp config: {pass/fail, unmasked/masked} indicates a ...
Page 124
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–50 solid indication points toward a problem with the incoming clock to the modem (scte). Lb synth pll: {pass/fail, unmasked/masked} indicates that the tx l-band synthesizer is not locked. This alarm will flash on during c...
Page 125
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–51 force alarm test: clicking on this button will force alarms receive menu figure 6-25. Receive menu major alarms fpga config: {pass/fail, unmasked/masked} indicates a receive fpga hardware failure. Dsp config: {pass/fai...
Page 126
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–52 this alarm will flash on during certain modem parameter changes. A solid indication points toward a problem with the incoming clock to the modem (scte). Lb synth pll: {pass/fail, unmasked/masked} indicates that the rx ...
Page 127
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–53 indicates if the circular redundancy check is passing in pcm- 30c and pcm-31c modes. T1/e1 signaling: {pass/fail, unmasked/masked} indicates that the framing unit is unable to find the expected framing pattern. Ifec lo...
Page 128
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–54 common menu figure 6-26. Common menu common alarms terr fpga cfg: {pass/fail, unmasked/masked} indicates an interface card fpga configuration failure. Codec fpga cfg: {pass/fail, unmasked/masked} indicates turbo codec ...
Page 129
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–55 voltage alarms +1.5v rx supply {pass/fail, unmasked/masked} displays the measured voltage of the 1.5 volt rx power bus located inside the modem. -1.5v tx supply {pass/fail, unmasked/masked} displays the measured voltag...
Page 130
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–56 6.3.4.6 system menu terminal & remote menu figure 6-27. Terminal & remote menu remote port control {terminal, computer} terminal emulation: {vt-100, wyse50, vt100} allows the user to select the emulation type. Terminal...
Page 131
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–57 hw/fw configuration menu figure 6-28. Hw/fw configuration menu firmware revision: displays the installed firmware revision. M&c revision: displays the installed monitor and control revision. Main board: indicates the r...
Page 132
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–58 features menu figure 6-29. Features menu the web browser menu allows viewing of actively enabled features. Each feature displays a series of symbols that describe feature status. The following symbols indicate: install...
Page 134
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–60 pattern error count: {no sync, nnnn x 10n} displays the number of errors detected by the test pattern checker. Carrier type: {normal, cw, dual, offset pos fir, neg fir} restart test pattern : clicking this button reset...
Page 135
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–61 when available buffer space is almost gone, the om20 will force a collision on the input port when it senses an incoming packet. This collision will cause the transmitting station to back off and retry the transmission...
Page 136
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–62 link status: the following status is available under the monitor menu/link status sub-menu when the ethernet data interface is selected: port 1 status: displays the current status of lan port 1. Port 2 status: displays...
Page 137
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–63 6.5.1 modem terminal mode control the modem can be interactively monitored and controlled in the terminal mode, with a full screen presentation of current settings and status. Programming is accomplished by selecting t...
Page 138
Om20 universal outdoor modem web browser/remote protocol mn-om20– revision 5 6–64.
Page 139: Chapter 7.
Mn-om20– revision 5 7–1 chapter 7. Maintenance and troubleshooting this section discusses unit maintenance and troubleshooting for the om20 universal satellite modem. The om20 contains a lithium battery . Danger of explosion exists if the battery is incorrectly replaced. Replace only with the same o...
Page 140
Om20 universal outdoor modem maintenance and troubleshooting mn-om20– revision 5 7–2 symptom possible cause the modem will not acquire the incoming carrier: there is an improper receive input to modem. The receive carrier level is too low. The receive carrier frequency is outside of the acquisition ...
Page 141
Om20 universal outdoor modem maintenance and troubleshooting mn-om20– revision 5 7–3 7.2.1.2 major rx alarms alarm possible cause fpga cfg indicates a receive fpga hardware failure. Dsp cfg indicates a receive dsp failure. Signal lock indicates that the demod is unable to lock to a signal. Frame loc...
Page 142
Om20 universal outdoor modem maintenance and troubleshooting mn-om20– revision 5 7–4 7.2.1.4 minor rx alarms alarm possible cause buff underflow indicates that a doppler buffer underflow has occurred. Buff near empty indicates that the doppler buffer is about to underflow. Buff near full indicates t...
Page 143
Om20 universal outdoor modem maintenance and troubleshooting mn-om20– revision 5 7–5 7.2.1.5 drop and insert alarms alarm possible cause multiframe lock the insert framer is not in sync. Crc lock an insert crc fault occurred. Valid in t1-esf, pcm-30, or pcm- 30c modes. T1 signaling an insert t1 yell...
Page 144
Om20 universal outdoor modem maintenance and troubleshooting mn-om20– revision 5 7–6 a feature exists that allows the user to ‘mask’ out certain alarms as explained below. Alarms that are recorded in the event buffer are the same as the alarm buffer. Masking alarms may cause undesirable modem perfor...
Page 145: Chapter 8.
Mn-om20– revision 5 8–1 chapter 8. Technical specifications 8.1 data rates 8.2 modulator modulation bpsk, qpsk, and oqpsk (8psk, 16qam optional) l-band tuning range 950 to 2050 mhz in 1 hz steps impedance 50-ohm connector n-type female return loss 10 db minimum output power -20 to -45 db output stab...
Page 146
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–2 8.3 demodulator demodulation bpsk, qpsk, and oqpsk (8psk, 16qam optional) l-band tuning range 950 to 2050 mhz in 1 hz steps impedance 50-ohm connector n-type female return loss 10 db minimum spectrum intelsat iess 308/309/...
Page 147
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–3 8.7 terrestrial interfaces a variety of standard interfaces are available for the om20 modem in stand-alone applications. 8.8 idr/esc interface (optional) g.703 t1 (dsx1) 1.544 mbps, 100-ohm balanced, ami and b8zs g.703 e2...
Page 148
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–4 bpsk tpc 21/44 2400 4772727 qpsk none 9600 20000000 qpsk vit 1/2 4800 10000000 qpsk vit 3/4 7200 15000000 qpsk vit 7/8 8400 17500000 qpsk seq 1/2 4800 2048000 qpsk seq 3/4 7200 2048000 qpsk seq 7/8 8400 2048000 qpsk tpc 1/...
Page 149
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–5 8.12.2 dvb 187 mode modulation code rate min data rate max data rate bpsk vit 1/2 2400 4583333 bpsk vit 2/3 2934 6111111 bpsk vit 3/4 3300 6875000 bpsk vit 5/6 3667 7638888 bpsk vit 7/8 3850 8020833 qpsk vit 1/2 4400 91666...
Page 150
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–6 16qam tre 3/4 13271 20000000 16qam tre 7/8 15483 20000000 204 mode modulation code rate min data rate max data rate bpsk vit 1/2 2400 5000000 bpsk vit 2/3 3200 6666666 bpsk vit 3/4 3600 7500000 bpsk vit 5/6 4000 8333333 bp...
Page 151
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–7 8.13 om20 / ber specifications 8.13.1 ber performance (viterbi) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r viterbi decoder specification 1/2 rate specification 3/4 rate speci...
Page 152
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–8 8.13.2 ber performance (sequential) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r sequential decoder specification 1/2 rate specification 3/4 rate specification 7/8 rate typical...
Page 153
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–9 8.13.3 ber performance (viterbi with reed-solomon) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r viterbi decoder reed solomon specification 1/2 rate specification 3/4 rate typic...
Page 154
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–10 8.13.4 ber performance (8psk trellis) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r trellis decoder specification 2/3 rate specification 2/3 rate w/rs typical performance 8psk ...
Page 155
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–11 8.13.5 ber performance (16qam viterbi) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 eb/no in db be r viterbi decoder specification 3/4 rate specification 7/8 rate typical performance ...
Page 156
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–12 8.13.6 ber performance (16qam viterbi with reed-solomon) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 eb/no in db be r viterbi decoder - reed solomon specification 3/4 rate w/rs speci...
Page 157
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–13 8.13.7 ber performance ((o)qpsk turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r turbo decoder specification turbo 1/2 specification turbo 3/4 typical performance b/o/qpsk ...
Page 158
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–14 8.13.8 ber performance (8psk turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r turbo decoder specification turbo 3/4 typical performance 8psk uncoded theory specification tu...
Page 159
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–15 8.13.9 ber performance (16qam turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 eb/no in db be r turbo decoder specification turbo 3/4 typical performance 16qam uncoded theory speci...
Page 160
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–16 1/2 rate 3/4 rate 7/8 rate 1/2 rate 3/4 rate 7/8 rate 1e-3 4.2 db 5.3 db 6.2 db 3.9 db 4.9 db 5.8 db 1e-4 4.8 db 6.1 db 7.1 db 4.5 db 5.6 db 6.5 db 1e-5 5.5 db 6.8 db 7.9 db 5.1 db 6.3 db 7.2 db 1e-6 6.1 db 7.6 db 8.6 db ...
Page 161
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–17 2/3 rate 2/3 rate w/rs 2/3 rate 2/3 rate w/rs 1e-3 6.2 db 5.2 db 4.8 db 4.9 db 1e-4 7 db 5.5 db 5.6 db 5.1 db 1e-5 7.8 db 5.8 db 6.4 db 5.4 db 1e-6 8.7 db 6.2 db 7.2 db 5.6 db 1e-7 9.5 db 6.5 db 8.1 db 5.8 db 1e-8 10.2 db...
Page 162
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–18 turbo 1/2 turbo 3/4 turbo 7/8 turbo 1/2 turbo 3/4 turbo 7/8 1e-3 tbd 3.2 db 4 db tbd 2.8 db 3.7 db 1e-4 tbd 3.4 db 4.1 db tbd 3 db 3.8 db 1e-5 2.7 db 3.6 db 4.2 db 2.4 db 3.2 db 3.9 db 1e-6 2.9 db 3.8 db 4.3 db 2.6 db 3.4...
Page 163
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–19 8.13.10 input level refer to figure 8-10 for the om20 power threshold limits. Figure 8-10 demodulator input level specification.
Page 164
Om20 universal outdoor modem technical specifications mn-om20– revision 5 8–20 notes:.
Page 165
Mn-om20– revision 5 a–1 appendix a. Product options a.1 hardware options the following enhanced interface cards are available. All options must be factory installed. A.1.1 g.703/idr esc interface the om20 can be equipped with a g.703/idr esc interface. Factory installed option a.1.2 turbo card the o...
Page 166
Om20 universal outdoor modem appendix a mn-om20– revision 5 a–2 a.2 customized options the om20 may be customized for specific customer requirements. Most modifications or customization can be accomplished by means of firmware/software modifications. The following are examples of the types of custom...
Page 167: Procedure
Mn-om20– revision 5 b–1 appendix b. Software upgrade procedure the outdoor modem software may be upgraded via the terminal or the web interface. B.1 terminal software upgrade the om20 outdoor modem offers the ability to perform field upgrades of the modem’s feature set quickly and easily from the te...
Page 168
Om20 universal outdoor modem appendix b mn-om20– revision 5 b–2 the value displayed on the top line of this menu is the 12-digit unit id. It is displayed as 3 sets of 4 digits in a dot-delineated format as follows: 1 2 3 4 . 1 2 3 4 . 1 2 3 4 your comtech ef data sales representative will ask you fo...
Page 169
Om20 universal outdoor modem appendix b mn-om20– revision 5 b–3 b.4 demonstration procedure the procedure for enabling a 30-day demo of the om20 options is similar to the procedure used for permanently updating the modems feature set. The one big difference being that at the end of 30 days, the demo...
Page 170
Om20 universal outdoor modem appendix b mn-om20– revision 5 b–4 the value displayed on the top line of this menu is the 12-digit unit id. It is displayed as 3 sets of 4 digits in a dot-delineated format as follows: 1 2 3 4 . 1 2 3 4 . 1 2 3 4 your radyne sales representative will ask you for this nu...
Page 171
Om20 universal outdoor modem appendix b mn-om20– revision 5 b–5 b.6 web browser software upgrade b.7 monitor and control all modem settings can be monitored and controlled through the browser based on the user access rights. The goal is an easy-to-use navigation scheme that would enable users to vie...
Page 172
Om20 universal outdoor modem appendix b mn-om20– revision 5 b–6 the web browser menu allows viewing of actively enabled features. Each feature displays a series of symbols that describe feature status. The following symbols indicate: installed no hardware available. Requires hardware for upgrade. Fe...
Page 173
Mn-om20– revision 5 c–1 appendix c. Carrier control c.1 states the om20 transmitter will turn off the carrier output automatically when the modem determines there is a major alarm. This is done to prevent the carrier from outputting an unknown spectrum and possibly disturbing adjacent carriers. This...
Page 174
Om20 universal outdoor modem appendix c mn-om20– revision 5 c–2 c.4 carrier auto modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel, but the output is automatically turned on after the change. When using the terminal, th...
Page 175
Mn-om20– revision 5 d–1 appendix d. Quick start guide d.1 introduction this section provides quick setup instructions to access the web browser through the rj45 ethernet interface. The web user interface allows for complete monitoring and control of all modem parameters and functions via a 10baset e...
Page 176
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–2 1. Turn off power to the om-20. 2. Install the reset mating connector on j2 port. 3. Turn on power to the om-20 and allow it to run for 2 minutes. 4. Turn off power to om-20 and remover the reset mating connector from j2. 5. The ip addr...
Page 177
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–3 a. The cables are secured. B. The link light is illuminated. C. The ip address that is used matches the modem’s ip address. D. The server and modem are on the same subnet. 9. Start the internet browser on the computer and enter the ip a...
Page 178
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–4 11. To navigate other parts of the site, the modem needs to know who the user is. Upon selecting any of the commands, the modem will request an authentication from the user. This authentication is done through the use of a username and ...
Page 179
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–5 1. Configure the modem first with the new subnet addresses. From the modem introduction page, click the ip administration tab located on the top of the screen. 2. Enter your username and password on the logon popup, and then press the e...
Page 180
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–6 have the same subnet mask. This field should be set after the changes are made to the modem. Refer to figure 6. 1. Configure the computer with the new subnet addresses. 2. Initiate ping test to ensure there is communication between the ...
Page 181
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–7 3. Select user1, user2, or user3 from the drop down edit user menu. The corresponding username and access rights will get updated on the screen. 4. Select a new username if desired, and password. Confirm the new password then click on t...
Page 182
Om20 universal outdoor modem appendix d mn-om20– revision 5 d–8 d.5.1 change authentication password the user can modify the authorization passwords. The user name can have up to 14 characters supporting alpha and numeric characters. Alpha characters can be entered using the up and down arrow keys. ...
Page 183
Mn-om20– revision 5 e–1 appendix e. Drop & insert (d&i) e.1 drop and insert (d&i) (for efficient drop & insert refer to appendix f) the radyne om20 drop and insert (d&i) function provides an interface between a full t1 or e1 trunk whose framing is specified in ccitt g.704 and a fractional nx64 kbps ...
Page 184
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–2 e.2 drop only when drop is enabled and insert is disabled, the om20 performs a drop-only function. Framed e1 or t1 data is input via the send data in port, the selected timeslots are dropped into the ibs frame structure. (refer to figur...
Page 185
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–3 rd ( ido ) om20 modem terrestrial trunk figure 3-11. Insert only with internal frame source e.4 mode selection the om20 d&i can be easily configured to support several commonly used terrestrial data formats. For e1 data, the user can ch...
Page 186
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–4 e.4.3 pcm-31 the pcm-31 mode of operation supports an e1 interface with no multiframe alignment (mfas) or channel associated signaling (cas). The user may independently program n timeslots to drop and n timeslots to insert where n = 1, ...
Page 187
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–5 figure e-1. Multidestinational communications e.6 drop and insert mapping the following displays under interface d&i setup (both tx and rx), are editing displays only: satch ts enter to edit any changes made in these displays are made o...
Page 188
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–6 assigning time slots: example : for a modem w/ drop & insert enabled at a data rate of 256kb (with timeslots assigned 1 - 1, 2 - 2, etc.). At a data rate of 256kb, the modem will allow 4 channels to assign timeslots (nx64kb). Under the ...
Page 189
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–7 it is not mandatory to assign timeslots in sequential order, although the lowest timeslot must be entered in the lowest channel. For example: timeslots may be assigned 1 - 2, 2 - 5, etc. But not 1 - 5, 2 - 2. E.7 configuring the om20 fo...
Page 190
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–8 n = 1, data rate = 64000 n = 2, data rate = 128000 n = 3, data rate = 192000 n = 4, data rate = 256000 n = 5, data rate = 320000 n = 6, data rate = 384000 n = 8, data rate = 512000 n = 10, data rate = 640000 n = 12, data rate = 768000 n...
Page 191
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–9 e.7.3.1 insert terrestrial frame source the insert terrestrial frame source selection tells the modem from where the insert terrestrial frame is coming. External: indicates that the terrestrial frame is to be input via the insert data i...
Page 192
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–10 under interface: under tx setup: set tx clock = scte under tx d&i: set drop mode = t1-d4 use satch ts edit capability to define desired mapping of satellite channels to drop terrestrial slots use map copy to copy tx edit to tx active u...
Page 193
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–11 under demodulator: under demod data: set data rate = 1536000 set conv enc = 3/4 rate vit under demodulator: set network spec. = drop & insert under interface: under rx setup: set buff size to desired depth under rx d&i: set insert mode...
Page 194
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–12 e.8 d&i maps and map editing the drop and insert multiplexer is programmed by loading it with a transmit and receive map. Maps always contain 30 entries, although, only the first “n” entries are relevant (see table 4-10). The om20 incl...
Page 195
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–13 rom maps are read-only and may not be modified (refer to table e-2). Table e-2. D&i rom maps r o m map t1/e1 time slot # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...
Page 196
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–14 the following paragraphs give examples of typical configurations that could use the rom maps as templates. The rom map used would have to be first copied to the appropriate active transmit (drop) and/or active receive (insert) map(s) b...
Page 197
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–15 from and or inserted into the first eight time slots of the t1 or e1 frame. The multiplexer would know to look only at the first eight entries in the active map(s) and would ignore the other 22 entries. To insert data received from a d...
Page 198
Om20 universal outdoor modem appendix e mn-om20– revision 5 e–16 notes:.
Page 199: Appendix F. Efficient
Mn-om20– revision 5 f–1 appendix f. Efficient drop & insert (d&i) f.1 introduction the following paragraphs describe the menu structure and procedure for configuring a radyne om20 modem for efficient drop & insert mode. F.2 prerequisite in order for a modem to be configured for efficient drop & inse...
Page 200
Om20 universal outdoor modem appendix f mn-om20– revision 5 f–2 features upgrade list d&i installed required enh async installed optional, required if desired aupc installed optional, required if desired f.3 efficient drop & insert mode with efficient drop & insert, the terrestrial interface selecti...
Page 201
Om20 universal outdoor modem appendix f mn-om20– revision 5 f–3 inband rate 150 available when enhanced async is enabled, this field 300 allows the operator to set the earth station to earth 600 station in-band rate. In most cases, this should be set to the 1200 same rate or higher than the es port ...
Page 202
Om20 universal outdoor modem appendix f mn-om20– revision 5 f–4 f.3.4 calculating the efficient d&i rate with enhanced asynchronous overhead the amount of overhead required to carry the enhanced async is driven by the in-band baud rate. The calculation is a two step process involving the in-band bau...
Page 203
Om20 universal outdoor modem appendix f mn-om20– revision 5 f–5 example 1c: change to enhanced async with in-band baud rate of 1200 x = truncation of (1200 / (5 * 125) x = truncation of (1.92) x = 1 add 1 * 5 * 125 bps to our previous calculation gives 331875 bps an increase of 625 bps to carry 1200...
Page 204
Om20 universal outdoor modem appendix f mn-om20– revision 5 f–6 notes:.
Page 205: Appendix G. Strap Codes
Mn-om20– revision 5 g–1 appendix g. Strap codes g.1 strap codes the strap code is a quick set key that sets many of the modem parameters. For quick setup of the modem, strap codes are very helpful. When a strap code is entered, the modem is automatically configured for the code’s corresponding data ...
Page 206
Om20 universal outdoor modem appendix g mn-om20– revision 5 g–2 12 2048 16/15 1/2 vit ibs ibs dis dis qpsk cnt 16 1544 96k 3/4 vit idr v.35 (iess) dis dis qpsk idr 32 2048 96k 3/4 vit idr v.35 (iess) dis dis qpsk idr 64 6312 96k 3/4 vit idr v.35 (iess) dis dis qpsk idr 128 8448 96k 3/4 vit idr v.35 ...
Page 207
Om20 universal outdoor modem appendix g mn-om20– revision 5 g–3 69 6312 1 3/4 vit none v.35 (iess) dis dis qpsk cnt 70 8448 1 3/4 vit none v.35 (iess) dis dis qpsk cnt 73 3152 1 1/2 vit none v.35 (iess) dis dis qpsk cnt 74 3152 1 3/4 vit none v.35 (iess) dis dis qpsk cnt 76 3264 1 1/2 vit none v.35 ...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–4 46 1152 16/15 3/4 vit ibs ibs dis dis qpsk cnt 51 1216 16/15 1/2 vit ibs ibs dis dis qpsk cnt 53 1216 16/15 3/4 vit ibs ibs dis dis qpsk cnt 54 1280 16/15 1/2 vit ibs ibs dis dis qpsk cnt 57 1280 16/15 3/4 vit ibs ibs dis dis qpsk cnt 5...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–5 g.2 sample applications the following section provides brief application notes for operating the modem and explains by example how to configure the modem for some of the most popular configurations. The following information illustrates...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–6 case 1: idr 8.448 mbps, 3/4 rate viterbi starting with the data rate = 512 kbps modulator: method 1 - under interface menu: set interface type set tx clock selection set mode to idr under mod data menu: set code rate to 3/4 vit set data...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–7 case 2: ibs 1.544 mbps, 3/4 rate viterbi starting with the data rate – 512 kbps modulator: method 1 - under interface menu: set interface type set tx clock selection set framing to 1/15 set mode to ibs under mod data menu: set code rate...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–8 case 3: closed network, 3/4 rate viterbi, ibs overhead starting with the data rate = 512 kbps modulator: method 1 - under interface menu: set interface type set tx clock selection set mode to idr: under mod data menu: set code rate to 3...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–9 case 4: loop timing example method 1 - under interface menu: under tx setup menu: set intf to rs-422 set sct source to scr set tx clock to scte set mode to ibs method 2 - under interface menu: under tx setup menu: set intf to rs-422 set...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 g–10 notes:.
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Mn-om20– revision 5 h–1 appendix h. Aupc operations h.1 automatic uplink power control (aupc operation) the modem has an optional built-in provision for automatic uplink power control, aupc. Aupc is useful when operating power levels are affected by environmental changes in the atmosphere. Aupc atte...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 h–2 drop in the remote e b /n o , it slowly begins to raise the output power, and will continue to adjust if the remote e b /n o continues to drop. As the rain increases in intensity, the remote e b /n o decreases but local modem continues ...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 h–3 there are safeguards built into the aupc system. First, the modulator has two parameters, which allow control of the maximum and minimum output power levels. Second, a nominal, or default, power level is specified which takes effect if ...
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Om20 universal outdoor modem appendix g mn-om20– revision 5 h–4 notes:.
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Metric conversions units of length unit centimeter inch foot yard mile meter kilometer millimeter 1 centimeter — 0.3937 0.03281 0.01094 6.214 x 10 -6 0.01 — — 1 inch 2.540 — 0.08333 0.2778 1.578 x 10 -5 0.254 — 25.4 1 foot 30.480 12.0 — 0.3333 1.893 x 10 -4 0.3048 — — 1 yard 91.44 36.0 3.0 — 5.679 x...
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