- DL manuals
- Radyne
- Modulator
- DMDVB20 LBST
- Installation And Operation Manual
Radyne DMDVB20 LBST Installation And Operation Manual
Summary of DMDVB20 LBST
Page 1
Dmdvb20 lbst l-band satellite modulator with dvb-s2 receiver and odu driver installation and operation manual tm138 revision 1.0 radyne corporation • 3138 e. Elwood st. • phoenix, az 85034 • (602) 437-9620 • fax: (602) 437-4811 • www.Radn.Com.
Page 2
Dmdvb20 lbst satellite modem warranty policy tm138 – rev. 1.0 iii warranty policy wp radyne corp. (seller) warrants the items manufactured and sold by radyne corp. To be free of defects in material and workmanship for a period of two (2) years from date of shipment radyne corp.’s obligation under it...
Page 3
Warranty policy dmdvb20 lbst satellite modem iv tm138 – rev. 1.0 in no event shall radyne corp. Be liable for incidental, consequential, special or resulting loss or damage of any kind howsoever caused. Radyne corp.’s liability for damages shall not exceed the payment, if any, received by radyne cor...
Page 4
Dmdvb20 lbst satellite modem preface tm138 – rev. 1.0 v preface p this manual provides installation and operation information for the radyne dmdvb20 lbst. This is a technical document intended for use by engineers, technicians, and operators responsible for the operation and maintenance of the dmdvb...
Page 5
Preface dmdvb20 lbst satellite modem vi tm138 – rev. 1.0 trademarks product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. Copyright ©2008, radyne corp. This manual is proprietary to radyne corp. And is intended fo...
Page 6: Toc
Dmdvb20 lbst satellite modem table of contents tm138 – rev. 1.0 vii table of contents toc section 1 - introduction ...............................................................................................1-1 1.0 overview ______________________________________________________________ 1-1 1.1 fe...
Page 7
Table of contents dmdvb20 lbst satellite modem viii tm138 – rev. 1.0 3.2.2 modem remote communications (rllp)____________________________________ 3-6 3.2.3 ethernet m&c port _____________________________________________________ 3-6 3.2.4 modem monitor status _________________________________________...
Page 8
Dmdvb20 lbst satellite modem table of contents tm138 – rev. 1.0 ix 4.4 terminal mode control___________________________________________________ 4-29 4.4.1 modem terminal mode control___________________________________________ 4-29 4.4.2 modem setup for terminal mode _________________________________...
Page 9
Table of contents dmdvb20 lbst satellite modem x tm138 – rev. 1.0 6.2.1.2 minor alarms ________________________________________________________ 6-5 6.2.1.3 common equipment faults _____________________________________________ 6-5 6.2.2 latched alarms _________________________________________________...
Page 10
Dmdvb20 lbst satellite modem table of contents tm138 – rev. 1.0 xi appendix c - carrier control ..................................................................................... C-1 c.0 states_________________________________________________________________ c-1 c.1 carrier off __________________...
Page 11
Table of contents dmdvb20 lbst satellite modem xii tm138 – rev. 1.0
Page 12
Dmdvb20 lbst satellite modem introduction tm138 – rev. 1.0 1-1 introduction 1 this chapter provides an overview of the dmdvb20 lbst satellite modem. The dmdvb20 lbst will be referred to in this manual as “the standard unit” and the dmdvb20 lbst will be referred to as the lbst. When describing the dm...
Page 13
Introduction dmdvb20 lbst satellite modem 1-2 tm138 – rev. 1.0 1.1 features/options installed at time of order the dmdvb20 lbst can be configured in the following different ways: • features and options that are installed when the unit is ordered • feature upgrades • hardware options that are install...
Page 14
Dmdvb20 lbst satellite modem introduction tm138 – rev. 1.0 1-3.
Page 15
Dmdvb20 lbst satellite modem installation tm138 – rev. 1.0 2-1 installation 2 this section provides unpacking and installation instructions, and a description of external connections and backward alarm information. 2.0 installation requirements the dmdvb20 lbst modem is designed to be installed with...
Page 16
Installation dmdvb20 lbst satellite modem 2-2 tm138 – rev. 1.0 before initially applying power to the unit, it is a good idea to disconnect the transmit output from the operating ground station equipment. This is especially true if the current configuration settings are unknown, where incorrect sett...
Page 17
Dmdvb20 lbst satellite modem installation tm138 – rev. 1.0 2-3 should the power cable/ac connector be of the wrong type for the installation, either the cable or the power connector end should be replaced. The power supply itself is designed for universal ac application. See specifications for appro...
Page 18
Installation dmdvb20 lbst satellite modem 2-4 tm138 – rev. 1.0 standard factory configuration settings modulator: data rate: 2.048 mbps mode: closed network frequency: 1200 mhz modulation: qpsk inner fec: 1/2 rate viterbi satellite framing: none scrambler: v.35 (iess) reed solomon: disabled modulato...
Page 19
Dmdvb20 lbst satellite modem installation tm138 – rev. 1.0 2-5 2.5 modulator checkout the following descriptions assume that the modem is installed in a suitable location with prime ac power and supporting equipment available. 2.5.1 initial power-up before initial power up of the modem, it is a good...
Page 20
Installation dmdvb20 lbst satellite modem 2-6 tm138 – rev. 1.0
Page 21
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-1 theory of operation 3 3.0 modem hardware the modem is based on a two printed circuit card (minimum configuration) design with additional optioned printed circuit cards available for additional features. The minimum configuration c...
Page 22
Theory of operation dmdvb20 lbst satellite modem 3-2 tm138 – rev. 1.0 in the complex downconverter, the signal for demodulation is amplified and sent through a variable wideband attenuator for agc. The gain-controlled signal is then passed through a complex downconverter to a low if. Figure 3-2. If ...
Page 23
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-3 the baseband printed circuit card also contains the monitor and control (m&c) circuitry responsible for: programmable part setup and initialization continuous control and adjustment of some functions calibration monitoring fault s...
Page 24
Theory of operation dmdvb20 lbst satellite modem 3-4 tm138 – rev. 1.0 figure 3-3. Satellite modem functional block diagram 3.1.1 front panel the front panel includes a 2 x 16 backlit lcd display, indicator leds, and a numeric keypad (refer to section 4.1). 3.1.2 baseband processing the baseband proc...
Page 25
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-5 3.1.3 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 ibs mode, the framer adds the appropriate framing as defined in 309. Th...
Page 26
Theory of operation dmdvb20 lbst satellite modem 3-6 tm138 – rev. 1.0 3.2.1 terminal port (supported in rev b or greater) 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 r...
Page 27
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-7 mod fault: de-energized when any transmit side fault is detected. Demod fault: de-energized when any receive side fault is detected. Common fault: de-energized when any fault that is not explicitly a tx or rx fault such as an m&c ...
Page 28
Theory of operation dmdvb20 lbst satellite modem 3-8 tm138 – rev. 1.0 3.4 loopback features (terrestrial) the modem provides for a number of different loopbacks. The loopback supported are: tx terrestrial loopback - tx data port is looped back to the rx data port after the interface driver/receiver....
Page 29
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-9 figure 3-5. Loopback functional block diagram.
Page 30
Theory of operation dmdvb20 lbst satellite modem 3-10 tm138 – rev. 1.0 3.5 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 fit the...
Page 31
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-11 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 3.5.1.1 scte: serial clock transmit externa...
Page 32
Theory of operation dmdvb20 lbst satellite modem 3-12 tm138 – rev. 1.0 the modem handles rx buffer clock selections based on source priority levels. The user assigns priorities to the clock sources based on source selections. Source 1 has the highest priority and source 4 being the last resort or lo...
Page 33
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-13 3.7 reed-solomon codec (tx only) reed solomon only pertains to tx options. Refer to figures 3-8, 3-9, and table 3-1. Utilizing a reed-solomon (r-s) outer codec concatenated with a convolutional inner codec is an effective way to ...
Page 34
Theory of operation dmdvb20 lbst satellite modem 3-14 tm138 – rev. 1.0 figure 3-7. Reed-solomon encoder functional block diagram figure 3-8. Reed-solomon decoder functional block diagram table 3-1. Reed-solomon codes type of service data rate (kbps) r-s code (n, k, t) 1 bandwidth expansion [ (n/k) -...
Page 35
Dmdvb20 lbst satellite modem theory of operation tm138 – rev. 1.0 3-15 3.8 locating the id code operational procedure the modem has unique id codes that allow the user to add feature upgrades to the modem without the unit having to be returned to the factory. Users are required to identify these id ...
Page 36
Theory of operation dmdvb20 lbst satellite modem 3-16 tm138 – rev. 1.0
Page 37
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-1 user interfaces 4 4.0 user interfaces this section contains information pertaining to the user interfaces for the modem. There are four user interfaces available for the modem. These are: • front panel interface – refer to section 4.1...
Page 38
User interfaces dmdvb20 lbst satellite modem 4-2 tm138 – rev. 1.0 table 4-1. Item number description function 1 lcd front panel display displays operating parameters and configuration data 2 cursor control arrow keys controls the up, down, right and left motion of the cursor in the lcd display windo...
Page 39
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-3 cursor 1 position left cursor 1 position right ip address changes digit increments digit value decrements digit value moves cursor 1 position left moves cursor 1 position right n/a n/a text strings changes character increments charact...
Page 40
User interfaces dmdvb20 lbst satellite modem 4-4 tm138 – rev. 1.0 4.2 parameter setup the four cursor control arrow keys are used to navigate the menu tree and select the parameter to be set. After arriving at a parameter that needs to be modified, depress . The first space of the modifiable paramet...
Page 41
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-5 4.3.2 modulator menu options and parameters network spec {closed net, dvb sat} the network spec command sets a number of parameters within the modem to meet a specification. The purpose is to eliminate keystrokes and potential compati...
Page 42
User interfaces dmdvb20 lbst satellite modem 4-6 tm138 – rev. 1.0 the uplink frequency is a calculated measurement of both the buc lo and osc side band. Once the menus are entered correctly, the user can control the uplink frequency from this menu. Power (dbm) {0 to -25 dbm} allows the user to enter...
Page 43
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-7 allows the user to select the tx code rate and type diff 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 mode...
Page 44
User interfaces dmdvb20 lbst satellite modem 4-8 tm138 – rev. 1.0 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 link for terrasa...
Page 45
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-9 low alarm thrsh {0.00 volts} allows user to select lower alarm limit/threshold for buc voltage. Hi alarm thrsh {0.00 volts} allows user to select high alarm limit/threshold for buc voltage. Low alarm thrsh {0.00 amps} allows user to s...
Page 46
User interfaces dmdvb20 lbst satellite modem 4-10 tm138 – rev. 1.0 4.3.3 demodulator menu options and parameters network spec the network spec command sets a number of parameters within the modem to meet a specification. The purpose is to eliminate keystrokes and potential compatibility problems. Da...
Page 47
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-11 sweep range (khz) {+/- 0.10 * symbol rate up to 7.5 mhz} allows the user to set the acquisition range for the demodulator input lvl thresh {-30 to 90 dbm} allows the user to adjust the low level threshold limit for input power. Input...
Page 48
User interfaces dmdvb20 lbst satellite modem 4-12 tm138 – rev. 1.0 gold seq n {000000} allows the user to enter specific tap value to choose different gold sequences for the s2 scrambler. The unit are decimal and the maximum value allow is 2 18 -1. Odu-lnb (menu) lo freq (mhz) allows the user to ent...
Page 49
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-13 sct clk src {internal, scr} allows the user to select internal source. Sct is the internally generated sct clock. Scr is the rx satellite clock. Scr is used for loop timing. Rx setup (menu) circuit id allows the user entry of a tx ci...
Page 50
User interfaces dmdvb20 lbst satellite modem 4-14 tm138 – rev. 1.0 general (menu) ext freq (mhz) {variable through data rate} allows the user to select the external clock frequency in mhz. Ref freq src {internal, external, high stability} allows the user to select the frequency reference source. Hig...
Page 51
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-15 voltages (menu) +1.5v rx supply displays the measured voltage of the 1.5 volt rx power bus located inside the modem. +1.5v tx supply displays the measured voltage of the 1.5 volt tx power bus located inside the modem. +3.3v supply di...
Page 52
User interfaces dmdvb20 lbst satellite modem 4-16 tm138 – rev. 1.0 4.3.6 alarms menu options and parameters masking alarms may cause undesirable modem performance. Current alarms (menu) tx major (menu) status edit table fpga cfg {pass/fail, unmasked/masked} indicates a transmit fpga configuration fa...
Page 53
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-17 tx minor (menu) terr clk act {pass/fail, unmasked/masked} indicates no terrestrial clock activity. Terr data act {pass/fail, unmasked/masked} indicates no tx data activity. Tx terr ais {pass/fail, unmasked/masked} indicates that ais ...
Page 54
User interfaces dmdvb20 lbst satellite modem 4-18 tm138 – rev. 1.0 dm cfg {pass/fail, unmasked/masked} indicates a demodulator dvb-s/dvb-s2 fpga hardware failure. Signal lock {pass/fail, unmasked/masked} indicates that the demod is unable to lock to a signal. Input lvl thresh {pass/fail, unmasked/ma...
Page 55
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-19 codec dev cfg {pass/fail, unmasked/masked} indicates turbo codec card asic configuration failure. Ext clock act {pass/fail, unmasked/masked} indicates the external clock activity. Ext ref act {pass/fail, unmasked/masked} indicates th...
Page 56
User interfaces dmdvb20 lbst satellite modem 4-20 tm138 – rev. 1.0 latched alarms {pass/fail} the following alarms are latched in order to catch intermittent failures: tx major (menu) fpga cfg dsp cfg sct clock pll sym clock pll lb synth pll buc current buc voltage tx minor (menu) terr clk act terr ...
Page 57
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-21 input lvl thresh frame lock lb synth pll rx minor (menu) buff underflow buff near empty buff near full buff overflow rx data activity ebno common (menu) terr fpga cfg codec fpga cfg codec dev cfg ext clock act ext ref act ext ref loc...
Page 58
User interfaces dmdvb20 lbst satellite modem 4-22 tm138 – rev. 1.0 4.3.7 system menu options and parameters date (mm/dd/yy) allows the user to enter the current date. Time {hh:mm:ss} allows the user to enter the current time. Config copy {current, cfg1……cfg10} allows user to copy, save and recall mo...
Page 59
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-23 remote port (menu) address {32 - 255} allows the user to enter the remote port multidrop address. Baud rate {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600} allows the user to enter the remote port baud rate. Interface {rs-232...
Page 60
User interfaces dmdvb20 lbst satellite modem 4-24 tm138 – rev. 1.0 the ip address mask of the local network. The mask is expressed in a hexadecimal format, and must be a valid tcp/ip mask. This field should be set before changes are made to the modem or router address. Modem ip addr {xxx.Xxx.Xxx.Xxx...
Page 61
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-25 10 mbps/hd – for 10 base-t in either half-duplex or full duplex. Hw/fw config (menu) firmware rev displays the installed firmware revision. M&c rev displays the installed monitor and control revision. Main board (menu) only the appro...
Page 62
User interfaces dmdvb20 lbst satellite modem 4-26 tm138 – rev. 1.0 terr intfc brd indicates the radyne assembly number for the terrestrial interface assembly. Codec board (menu) indicates the radyne part number for the codec board. Tpc fpga image used for factory test only. Rs fpga image used for fa...
Page 63
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-27 4.3.8 test menu options and parameters tx test pattern {none, 2047, 2^15-1, 2^23-1} allows the user to enable the tests listed above. Rx test pattern {none, 2047, 2^15-1, 2^23-1} allows the user to enable the tests listed above. Patt...
Page 64
User interfaces dmdvb20 lbst satellite modem 4-28 tm138 – rev. 1.0 offset: causes a single sideband output. Pos fir: for manufacturer’s use only. Neg fir: for manufacturer’s use only..
Page 65
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-29 4.4 terminal mode control the terminal mode control allows the use of an external terminal or computer to monitor and control the modem from a full screen interactive presentation operated by the modem itself. No external software is...
Page 66
User interfaces dmdvb20 lbst satellite modem 4-30 tm138 – rev. 1.0 4.5 terminal port user interface the remote port (j20) of the modem allows for complete control and monitoring of all parameters and functions via an rs-232 serial interface, or rs-485 for rllp protocol. ‘terminal mode’ can be entere...
Page 67
Dmdvb20 lbst satellite modem user interfaces tm138 – rev. 1.0 4-31.
Page 68
Dmdvb20 lbst satellite modem rear panel interfaces tm138 – rev. 1.0 5-1 rear panel interfaces 5 this section discusses the electrical interfaces available from the rear panel. All locations are as viewed from the rear of the unit unless otherwise specified. 5.0 dmdvb20 lbst connections all dmdvb20 l...
Page 69
Rear panel interfaces dmdvb20 lbst satellite modem 5-2 tm138 – rev. 1.0 5.2 power input modules 5.2.1 ac power input module ac input module (figure 5-1) is located on the left side of the unit. Power applied to the port with the supplied power cable is 100 – 240 vac, 50 – 60 hz. Integrated into the ...
Page 70
Dmdvb20 lbst satellite modem rear panel interfaces tm138 – rev. 1.0 5-3 5 demod fault df-nc no direction 6 demod fault df-no no direction *7 prompt cef-c no direction *8 prompt cef-nc no direction *9 prompt cef-no no direction *10 service sp1-c no direction *11 service sp1-nc no direction *12 servic...
Page 71
Rear panel interfaces dmdvb20 lbst satellite modem 5-4 tm138 – rev. 1.0 5.3.8 eia-530 (j19) the eia-530 port is an rs-422/v.35/rs-232 connection. It is a 25-pin female “d” connector. Refer to table 5-3 for pinouts. Table 5-3. Eia-530 port (rs-422/v.35/rs-232) 25-pin female “d” connector (j19) pin no...
Page 72
Dmdvb20 lbst satellite modem rear panel interfaces tm138 – rev. 1.0 5-5 5.3.9 remote (j20) the remote port is a rs-485 or rs-232 connection for remote monitor and control of the modem. It is a 9-pin female “d” connector. Refer to table 5-4 for pinouts. Table 5-4. Remote port (rs-485 or rs-232) 9-pin...
Page 73
Rear panel interfaces dmdvb20 lbst satellite modem 5-6 tm138 – rev. 1.0
Page 74
Dmdvb20 lbst satellite modem maintenance and troubleshooting tm138 – rev. 1.0 6-1 maintenance and troubleshooting 6 this section discusses unit maintenance and troubleshooting for the universal satellite modem. The dmdvb20 lbst contains a lithium battery. Danger of explosion exists if the battery is...
Page 75
Maintenance and troubleshooting dmdvb20 lbst satellite modem 6-2 tm138 – rev. 1.0 symptom possible cause there is an improper receive input to modem. The receive carrier level is too low. The receive carrier frequency is outside of the acquisition range. The transmit carrier is incompatible. The mod...
Page 76
Dmdvb20 lbst satellite modem maintenance and troubleshooting tm138 – rev. 1.0 6-3 6.1.1.2 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 lock i...
Page 77
Maintenance and troubleshooting dmdvb20 lbst satellite modem 6-4 tm138 – rev. 1.0 6.1.1.4 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 that...
Page 78
Dmdvb20 lbst satellite modem maintenance and troubleshooting tm138 – rev. 1.0 6-5 6.2 alarm masks the modem performs a high degree of self-monitoring and fault isolation. The alarms for these faults are separated into the following three categories: active alarms common equipment alarms backward ala...
Page 79
Maintenance and troubleshooting dmdvb20 lbst satellite modem 6-6 tm138 – rev. 1.0
Page 80
Dmdvb20 lbst satellite modem technical specifications tm138 – rev. 1.0 7-1 technical specifications 7 7.0 data rates refer to section 7.9. 7.1 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, 50-ohm...
Page 81
Technical specifications dmdvb20 lbst satellite modem 7-2 tm138 – rev. 1.0 7.2 demodulator demodulation qpsk and (8psk, 16apsk optional) l-band tuning range 950 to 2150 mhz in 1 hz steps impedance 75-ohm connector f-type female return loss 7 db minimum spectrum etsi en302 307 compliant input level -...
Page 82
Dmdvb20 lbst satellite modem technical specifications tm138 – rev. 1.0 7-3 7.4 terrestrial interfaces a variety of standard interfaces are available for the dmdvb20 lbst modem in stand-alone applications. 7.5 ibs/synchronous interface (standard) rs-422/530 all rates, differential, clock/data, dce it...
Page 83
Technical specifications dmdvb20 lbst satellite modem 7-4 tm138 – rev. 1.0 7.8 dmdvb20 lbst modulator data rate limits 7.8.1 closed net data rate limits (non-dvb) modulation code rate min data rate max data rate bpsk none 4800 10000000 bpsk vit 1/2 2400 5000000 bpsk vit 3/4 3600 7500000 bpsk vit 7/8...
Page 84
Dmdvb20 lbst satellite modem technical specifications tm138 – rev. 1.0 7-5 8psk tre 2/3 9600 20000000 8psk tpc 3/4 10800 20000000 8psk tpc 7/8 12600 20000000 16qam vit 3/4 14400 20000000 16qam vit 7/8 16840 20000000 16qam tpc 3/4 1440 20000000 16qam tpc 7/8 16800 20000000 7.8.2 dvb 187 mode modulati...
Page 85
Technical specifications dmdvb20 lbst satellite modem 7-6 tm138 – rev. 1.0 qpsk vit 5/6 7373 15359477 qpsk vit 7/8 7742 16127450 8psk tre 2/3 8848 18431372 8psk tre 5/6 11059 20000000 8psk tre 8/9 11797 20000000 16qam tre 3/4 13271 20000000 16qam tre 7/8 15483 20000000 204 mode modulation code rate ...
Page 86
Dmdvb20 lbst satellite modem technical specifications tm138 – rev. 1.0 7-7 7.9 dmdvb20 lbst demodulator specifications 7.9.1 data rates (dvb-s2 with pilots off) data rates (mbps with pilots off) mpeg frame size modulation fec minimum long = 64.8k maximum long = 64.8k minimum short = 16.2k maximum sh...
Page 87
Technical specifications dmdvb20 lbst satellite modem 7-8 tm138 – rev. 1.0 7.10 ber performance (dvb-s2) per en 302-307 v1.1.2 typical if back-to back eb/no performance qpsk (dvb-s2) ber 1/2 3/5 2/3 3/4 4/5 5/6 8/9 9/10 1.00 x 10 -06 ( 2.0 2.5 2.7 3.0 3.5 3.8 4.5 4.7 1.00 x 10 -06 (> 20 msps) 2.0 2....
Page 88
Dmdvb20 lbst satellite modem technical specifications tm138 – rev. 1.0 7-9.
Page 89
Dmdvb20 lbst satellite modem appendix a tm138 – rev. 1.0 a-1 product options a a.0 hardware options the following enhanced interface cards are available. A.0.1 internal high stability the modem can be equipped with a 5x10 -8 or better stability frequency reference as an add-on enhancement. This is a...
Page 90
Appendix a dmdvb20 lbst satellite modem a-2 tm138 – rev. 1.0
Page 91
Dmdvb20 lbst satellite modem appendix b tm138 – rev. 1.0 b-1 front panel upgrade procedure b b.0 introduction the satellite modem offers the ability to perform field upgrades of the modem’s feature set quickly and easily from the front panel. Purchased upgrades will become part of the modems permane...
Page 92
Appendix b dmdvb20 lbst satellite modem b-2 tm138 – rev. 1.0 2. Contact radyne with the unit id and desired upgrades. The modem’s unit id can be found on the front panel as follows: a. From the modem’s main menu, scroll right to the system menu. B. Scroll down. C. Scroll right to the hw/fw config me...
Page 93
Dmdvb20 lbst satellite modem appendix b tm138 – rev. 1.0 b-3 b.3 demonstration procedure the procedure for enabling a 30-day demo of the 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 feature...
Page 94
Appendix b dmdvb20 lbst satellite modem b-4 tm138 – rev. 1.0 2. Contact radyne with the unit id and request a demonstration. The modem’s unit id can be found on the front panel as follows: a. From the modem’s main menu, scroll right to the system menu. B. Scroll down. C. Scroll right to the hw/fw co...
Page 95
Dmdvb20 lbst satellite modem appendix b tm138 – rev. 1.0 b-5 b.3.1 running in demonstration mode because of the possible interruption in traffic when the demonstration mode expires, several indicators are used to inform an operator that the modem is indeed, operating in demonstration mode. The most ...
Page 96
Appendix b dmdvb20 lbst satellite modem b-6 tm138 – rev. 1.0 b.3.2 canceling demonstration mode at any time, a demonstration may be canceled and have the modem return to its normal operation. Once the demonstration has been canceled, it cannot be restarted using the old demonstration code. In order ...
Page 97
Dmdvb20 lbst satellite modem appendix b tm138 – rev. 1.0 b-7.
Page 98
Dmdvb20 lbst satellite modem appendix c tm138 – rev. 1.0 c- 1 carrier control c c.0 states the 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 ...
Page 99
Appendix c dmdvb20 lbst satellite modem c-2 tm138 – rev. 1.0 c.5 carrier rts modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel, and the user is required to enter “yes” to re-enable output after the change. When using th...
Page 100
Dmdvb20 lbst satellite modem appendix c tm138 – rev. 1.0 c- 3.
Page 101
Dmdvb20 lbst satellite modem appendix d tm138 – rev. 1.0 d -1 strap codes d d.0 strap codes for modulator only the strap code is a quick set key that sets many of the modulator parameters. When a strap code is entered, the modulator automatically configured for the code’s corresponding data rate, ov...
Page 102
Appendix d dmdvb20 lbst satellite modem d-2 tm138 – rev. 1.0 48 128 1 3/4 vit none v.35 (iess) dis qpsk cnt 65 256 1 1/2 vit none v.35 (iess) dis qpsk cnt 66 256 1 3/4 vit none v.35 (iess) dis qpsk cnt 68 320 1 1/2 vit none v.35 (iess) dis qpsk cnt 72 320 1 3/4 vit none v.35 (iess) dis qpsk cnt 80 3...
Page 103
Dmdvb20 lbst satellite modem appendix d tm138 – rev. 1.0 d -3 112 64 16/15 3/4 vit ibs ibs dis qpsk ibs 131 128 16/15 3/4 vit ibs ibs dis qpsk ibs 133 256 16/15 3/4 vit ibs ibs dis qpsk ibs 134 192 16/15 1/2 vit ibs ibs dis qpsk cnt 137 192 16/15 3/4 vit ibs ibs dis qpsk cnt 138 320 16/15 1/2 vit ib...
Page 104
Appendix d dmdvb20 lbst satellite modem d-4 tm138 – rev. 1.0 75 1472 16/15 1/2 vit ibs ibs dis qpsk cnt 77 1472 16/15 3/4 vit ibs ibs dis qpsk cnt 78 1600 16/15 1/2 vit ibs ibs dis qpsk cnt 83 1600 16/15 3/4 vit ibs ibs dis qpsk cnt 85 1664 16/15 1/2 vit ibs ibs dis qpsk cnt 86 1664 16/15 3/4 vit ib...
Page 105
Dmdvb20 lbst satellite modem appendix d tm138 – rev. 1.0 d -5 any rate 2.048 & lower: 1/15 framing or no framing, 1/2, 3/4, 7/8 rate fec d.1.1 operational case examples for best results always begin setup by setting the data rate to 512 kbps. This data rate is applicable for all modes and as such pr...
Page 106
Appendix d dmdvb20 lbst satellite modem d-6 tm138 – rev. 1.0 method 2 - under interface menu: set interface type set buff clock selection set buffer size set demod strap code to: 120 under demod if menu: set desired rx frequency case 2: closed network, 3/4 rate viterbi, ibs overhead starting with th...
Page 107
Dmdvb20 lbst satellite modem appendix d tm138 – rev. 1.0 d -7.
Page 108
Dmdvb20 lbst satellite modem glossary tm138 – rev. 1.0 g -1 glossary g a a ampere ac alternating current adc analog to digital converter agc automatic gain control ais alarm indication system. A signal comprised of all binary 1s. Amsl above mean sea level ansi american national standards institute a...
Page 109
Glossary dmdvb20 lbst satellite modem g-2 tm138 – rev. 1.0 c c celsius cats computer aided test software ca/xxxx cable assembly cd-rom compact disk – read only memory clk clock cm centimeter com common cpu central processing unit crc cyclic redundancy check. A system of error checking performed at t...
Page 110
Dmdvb20 lbst satellite modem glossary tm138 – rev. 1.0 g -3 f f fahrenheit fas frame acquisition sync. A repeating series bits, which allow acquisition of a frame. Fcc federal communications commission fec forward error correction fifo first in, first out fpga field programmable gate arrays fw firmw...
Page 111
Glossary dmdvb20 lbst satellite modem g-4 tm138 – rev. 1.0 k kbps kilobits per second kbps kilobytes per second kg kilogram khz kilohertz ksps kilosymbols per second l lcd liquid crystal display led light emitting diode lo local oscillator m ma milliampere mbps megabits per second mfas multi-frame a...
Page 112
Dmdvb20 lbst satellite modem glossary tm138 – rev. 1.0 g -5 q qam quadrature amplitude modulation qpsk quadrature phase shift keying r ram random access memory rf radio frequency rom read only memory rms root mean square ru rack unit. 1 ru = 1.75”/4.45 cm rx receive (receiver) rxd receive data r-s r...
Page 113
Glossary dmdvb20 lbst satellite modem g-6 tm138 – rev. 1.0 w x y z w watt misc. µs microsecond 16qam 16 quadrature amplitude modulation 8psk 8 phase shift keying.