1. DL manuals
  2. GAI-Tronics
  3. Telephone Accessories
  4. ITA2000A Series
  5. User and installation manual

GAI-Tronics ITA2000A Series User and installation manual - Table of Contents

Manual is about: ITA2000A Series Tone Remote Adapter with Scanning

Summary of ITA2000A Series

  • Page 1

    Pub. 43004-010h gai-tronics corporation 400 e. Wyomissing ave. Mohnton, pa 19540 usa 610-777-1374  800-492-1212  fax: 610-796-5954 v isit www . Gai - tronics . Com for product literature and manuals g a i - t r o n i c s ® c o r p o r a t i o n a h u b b e l l c o m p a n y ita2000a series tone re...

  • Page 2

    03/13 publication 43004-010h i confidentiality notice this manual is provided solely as an operational, installation, and maintenance guide and contains sensitive business and technical information that is confidential and proprietary to gai-tronics. Gai-tronics retains all intellectual property and...

  • Page 3: Table of Contents

    03/13 publication 43004-010h ii table of contents foreword ............................................................................................................................................................... 1 s cope of m anual ................................................................

  • Page 4

    Table of contents ita2000a series tone remote adapter 03/13 publication 43004-010h iii r adio t ie l ine (t elephone ) c onnections .......................................................................................................... 25 analog facility interface codes .............................

  • Page 5: Foreword

    1 03/13 foreword scope of manual this manual offers descriptive data and service information for the ita2000a tone remote adapter with scanning. The unit is shipped as a conventional tone remote adapter but can easily be converted to a scanning tone remote adapter with a simple switch setting change...

  • Page 6

    Foreword ita2000a series tone remote adapter 03/13 2 safe handling of cmos integrated circuit devices many of the integrated circuit devices used in communications equipment are of the complementary metal oxide semiconductor (cmos) type. Because of their high open circuit impedance, cmos integrated ...

  • Page 7: Description

    3 03/13 description features and benefits of the ita2000a tone remote adapter feature benefit adjustable receive input sensitivity and transmit output level allows flexibility with different radio systems and user environments, where radio output levels, line losses, and noise factors vary. Autoleve...

  • Page 8

    Description ita2000a series tone remote adapter 03/13 4 additional features and benefits of the ita2000a tone remote adapter in scan mode feature benefit adds scanning capability to conventional multi-channel radios enhances radio functionality by using channel steering capability of both non-scanni...

  • Page 9

    Ita2000a series tone remote adapter description 5 03/13 product overview the ita2000a tone remote adapter uses a state-of-the-art digital signal processor (dsp) to ensure highly accurate and fast tone encoding/decoding and audio filtering. It allows a radio to be remotely controlled through dedicate...

  • Page 10

    Description ita2000a series tone remote adapter 03/13 6 specifications color ...................................................................................................................................................... Black physical size .......................................................

  • Page 11: Operation

    7 03/13 operation front panel led operation pwr led the pwr led illuminates to indicate that the ita2000a power is on and the dsp is operating. Ptt led the push-to-talk led, labeled ptt, illuminates when a valid transmit request has been decoded or the mic ptt is actuated. Mon/scan led conventional:...

  • Page 12

    Operation ita2000a series tone remote adapter 03/13 8 supervisor button the supervisor button with the associated led indicator provide full dispatcher control of the radio system. This button is used to enter the supervisor mode or the test mode. Refer to the operation section for more information....

  • Page 13

    Ita2000a series tone remote adapter operation 9 03/13 the rear view of the ita2000a shows the line, accessory, radio, and power connector locations. Also shown are the tx and rx level adjustment pots, and the location of the internal fuse. Tone control interface the ita2000a decodes standard eia ton...

  • Page 14

    Operation ita2000a series tone remote adapter 03/13 10 scan start/stop in the scan mode upon power-up, the ita2000a will automatically start scanning. While in scan mode, the ita2000a asserts, in sequence, the channel steer pins at the configured scan rate. Upon detection of carrier, the unit stops ...

  • Page 15

    Ita2000a series tone remote adapter operation 11 03/13 supervisor mode the ita2000a is placed in the supervisor mode by pressing the supervisor button for less than four seconds, or by pressing either the monitor or ptt buttons of an attached desk-mic accessory. This feature can be disabled in conve...

  • Page 16

    Operation ita2000a series tone remote adapter 03/13 12 test mode to enter the test mode, press the supervisor button for more than four seconds. All leds illuminate for two seconds indicating the ita2000a has entered the test mode. While the ita2000a is in test mode, pressing the supervisor button m...

  • Page 17: Installation

    13 03/13 installation planning the installation mounting the ita2000a tone remote adapter can be installed in a customer-supplied rack or cabinet, or can be placed on a desk for convenience when used with microphones and other accessories. A 19-inch standard rack panel, 1.75 inches high, is also ava...

  • Page 18

    Installation ita2000a series tone remote adapter 03/13 14 equipment required test equipment  rf service monitor, or communications service analyzer such as the motorola r-2600 with rtl-1003a transformer  audio acvm  multimeter or vom  #1 phillips screwdriver  8-pin modular plug with 'pigtail' l...

  • Page 19

    Ita2000a series tone remote adapter installation 15 03/13 power connections the ita2000a is supplied with a dc power cable. Plug the cable’s din connector into the dc power receptacle on the rear of the unit. Connect the red lead to the positive terminal and the black lead to the negative terminal o...

  • Page 20

    Installation ita2000a series tone remote adapter 03/13 16 conventional to scanning operation conversion n ote : the ita2000a includes an led labeled mon (top) and scan (bottom). It is the third led from the left when looking at the unit from the front. In conventional mode, the led indicates monitor...

  • Page 21

    Ita2000a series tone remote adapter installation 17 03/13 radio connector (j2) the radio connector is located on the rear of the ita2000a. The connector pinout appears below: input/output radio connector table pin wire color description input/ output range j2-1 black/ white channel steer 3 o ju4 b p...

  • Page 22

    Installation ita2000a series tone remote adapter 03/13 18 transmit audio – pin 12 connect this single-ended output to a microphone input circuit or exciter input of the transmit section. The radio should be capable of a level from 32 mv rms to 800 mv rms . Receive audio – pin 3 rx high (+), pin 11 r...

  • Page 23

    Ita2000a series tone remote adapter installation 19 03/13 these pins output the binary equivalent of the decoded function tone from the tone remote or the current scan selected channel. The chart that follows shows the pin designation and output for the decoded function tone. These outputs can be us...

  • Page 24

    Installation ita2000a series tone remote adapter 03/13 20 accessory connector (j3) the accessory connector is located on the rear of the ita2000a tone remote adapter. Input/output accessory connector table pin wire color description input/ output range j3-1 black/white channel steer 3 o ju11 b posit...

  • Page 25

    Ita2000a series tone remote adapter installation 21 03/13 ita2000a to kenwood tk-790/890 series radio connection chart adapter pin adapter function wire color radio connector pin radio function 1 channel steer 3 blk w/white stripe 5 auxiliary input 4 (programmable) 2 csq detect in blue w/white strip...

  • Page 26

    Installation ita2000a series tone remote adapter 03/13 22 warning if programmable or n/c pins are not used, clip off or secure in a fashion to prevent leads from shorting together, thus preventing damage to the adapter or the radio. Adapter radio connector connector termination with internal jumpers...

  • Page 27

    Ita2000a series tone remote adapter installation 23 03/13 ita2000a to rpg radio connection chart adapter pin adapter function wire color radio connector pin radio function 1 channel steer 3 black w/white stripe 6, 8, 9, 12, or 14 programmable 2 csq detect in blue w/white stripe 4, 8, 12, or 14 progr...

  • Page 28

    Installation ita2000a series tone remote adapter 03/13 24 ita2000a tone remote adapter to mcs2000 radio connection chart (conventional mode only) 15-pin pin # adapter function wire color radio connector pin # radio function 1 channel steer 3 black w/white stripe n/c programmable 2 csq detect in blue...

  • Page 29

    Ita2000a series tone remote adapter installation 25 03/13 radio tie line (telephone) connections if leased lines from your local telephone company are used between the remotes and the ita2000a tone remote adapter, the telephone company (local exchange carrier) may request a facility interface code (...

  • Page 30

    Installation ita2000a series tone remote adapter 03/13 26 jumpers the default setting of the circuit board jumpers provide normal operation and should be changed only for special applications. Remove the cover of the ita2000a to access these jumpers. The “a” and “b” positions are indicated on the pc...

  • Page 31

    Ita2000a series tone remote adapter installation 27 03/13 channel revert (conventional mode only) channel revert allows the ita2000a to output a certain value on the four channel selection lines after a transmit is complete from the remote. The value output on the channel selection lines is determin...

  • Page 32

    Installation ita2000a series tone remote adapter 03/13 28 configuration switch settings for conventional mode operation two sets of programming switches are included on the front panel of the ita2000a. They are used to set up and interface with the radio system. The switch function settings are as f...

  • Page 33

    Ita2000a series tone remote adapter installation 29 03/13 switch settings for sw2 (conventional) switch determines: up down sw2-1 the receive audio input for radio connector pin 3. Speaker level audio (unsquelched de-emphasized audio) detector audio (squelched, requires de-emphasis) sw2-2 whether to...

  • Page 34

    Installation ita2000a series tone remote adapter 03/13 30 configuration switch settings for scan mode operation two sets of configuration switches are included on the front panel of the ita2000a. The switch function settings are as follows: switch settings for sw1 (scan) switch determines: up down s...

  • Page 35

    Ita2000a series tone remote adapter installation 31 03/13 switch settings for sw2 (scan) switch determines: up/down settings sw2-1 to sw2-4 scan limit: maximum number of channels to be scanned. Sequence of scanning starts at channel 1 and counts upward to the maximum number of channels to be scanned...

  • Page 36

    Installation ita2000a series tone remote adapter 03/13 32 level settings and adjustments receive audio level the ita2000a is shipped from the factory set to accept a 300 mv receive audio input level from the station’s receiver. To accommodate receivers with different audio levels, perform the follow...

  • Page 37

    Ita2000a series tone remote adapter installation 33 03/13 transmit audio level begin by causing the station to transmit by sending a 1000 hz tone at reference level from a remote dispatch console or desk set. A communications service analyzer with a built-in tone remote testing function, such as the...

  • Page 38

    Installation ita2000a series tone remote adapter 03/13 34 test diagnostics enter this mode by pressing the supervisor button for more than 4 seconds. All leds illuminate for 2 seconds, indicating the ita2000a is in the test mode. Pressing the supervisor button momentarily (less than 4 seconds) cause...

  • Page 39: Theory Of Operation

    35 03/13 theory of operation technical overview u1 performs various tasks requested by the firmware which reconditions the signal, such as 2175 hz guard tone filtering, line auto-leveling, tone generation, tone filtering, tone decoding, and 2-wire audio hybrid control. Radio rx audio and tx audio fr...

  • Page 40

    Theory of operation ita2000a series tone remote adapter 03/13 36 accessory transmit accessory tx audio input j3-12 expects a nominal input level of 80 mv ac. U18 buffers the signal and u19 routes the signal to the radio tx and the telephone line output based on the state of the accessory ptt j3-6. F...

  • Page 41: Troubleshooting

    37 03/13 troubleshooting troubleshooting the ita2000a tone remote adapter the following is a list of potential problems you may encounter and possible solutions. Problem possible solution the ita2000a will not key the radio. Ensure that the tone remotes are generating a function tone that the ita200...

  • Page 42

    Troubleshooting ita2000a series tone remote adapter 03/13 38 problem possible solution there is no tx audio. Verify that the radio is being keyed when transmitting to the ita2000a from a tone remote. If the radio is not being keyed, refer to the section above describing the radio not being keyed. En...

  • Page 43: Main Circuit Board

    39 03/13 main circuit board.

  • Page 44

    Main circuit board ita2000a series tone remote adapter 40

  • Page 45: Schematics

    41 03/13 schematics.

  • Page 46

    Schematics ita2000a series tone remote adapter 42 digital section - schematic diagram sheet 1 of 6.

  • Page 47

    Ita2000a series tone remote adapter schematics 43 serial logic - schematic diagram sheet 2 of 6.

  • Page 48

    Schematics ita2000a series tone remote adapter 44 power supply section - schematic diagram sheet 3 of 6.

  • Page 49

    Ita2000a series tone remote adapter schematics 45 line interface - schematic diagram sheet 4 of 6.

  • Page 50

    Schematics ita2000a series tone remote adapter 46 radio, phone, and mic - schematic diagram sheet 5 of 6.

  • Page 51

    Ita2000a series tone remote adapter schematics 47 output port - schematic diagram sheet 6 of 6.

  • Page 52

    Schematics ita2000a series tone remote adapter 48 notes:.

  • Page 53: Definitions and Acronyms

    49 03/13 definitions and acronyms term definition channel a single path, separated by frequency or time divisions, for transmitting electrical signals. A receive (one-way) or receive and transmit (two-way) frequency path. Csq carrier squelch ft function tone hlgt high level guard tone home mode all ...

  • Page 54

    Notes: ita2000a series tone remote adapter 50