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Pub. 43004-027B 

Model IDA1000A DC Remote Adapter Installation and Service Manual 

Page 8 of 24 

P:\Radio Products-Current Release\43004\43004-027B\43004-027B.docx 
06/18 

Operation 

Operational Description 

The Model IDA1000A DC Remote Adapter is for use with base stations or repeaters controlled from a 
remote desk set or console by dc line currents.  One adapter can interface up to ten dc remote desk sets to 
the base station or repeater, depending on the system design. 

The Model IDA1000A incorporates all necessary circuit interfacing to translate single-frequency 
(5.5 mA) transmit and monitor (-2.5 mA) commands into signals to control base station operation.  Where 
applicable, F2 transmit (12.5 mA) commands are also supported when used with a two-frequency base 
station.  Frequency outputs are jumper-selectable for open collector, 5 V pull up, or pull down.  The 
Model IDA1000A can be programmed to revert to F1 or F2 receive after transmit (see Table 3). 

Monitor operation can be either latching or non-latching.  The adapter routes audio signals between the 
wire line and base station circuitry.  Transmit audio from the wire line is amplified before being input to 
the station.  Receiver audio from the base station is amplified before being output to the wire line. 

Five LED function indicators are included on the front panel.  When illuminated, they indicate wire line 
push-to-talk command, a monitor command, and presence of 5 V dc power.  Two LEDs indicate detection 
of line current levels of 5.5 mA (

F1

) or 12.5 mA (

F2

). 

Front Panel LED Operation 

The operation of the IDA1000A DC Remote Adapter front panel LEDs is as follows: 

PWR LED 

The 

PWR

 LED illuminates to indicate that the IDA1000A DC Remote Adapter dc power is on. 

PTT LED 

The push-to-talk LED, labeled 

PTT

, illuminates when a valid transmit request has been decoded. 

MON LED 

The timed or constant monitor LED, labeled 

MON

, illuminates when the IDA1000A is in the monitor 

mode, and indicates detection of a line current level of -2.5 mA. 

F2 LED 

The front panel 

F2

 LED indicates detection of line current level of 12.5 mA (F2).  It illuminates to 

indicate that the unit is programmed to use the F2 transmit (12.5 mA) command, which is supported when 
used with a two-frequency base station. 

F1 LED 

The front panel 

F1

 LED illuminates to indicate that the unit is programmed to translate the single-

frequency (5.5 mA) transmit command into signals to control base station operation.  The IDA1000A 
may be programmed to revert to F1 or F2 receive after transmit. 

Summary of Contents for IDA1000A

Page 1: ...eading PA 19605 USA 610 777 1374 800 492 1212 Fax 610 796 5954 VISIT 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 Model IDA1000A DC Remote Adapter Installation and Service Manual ...

Page 2: ...er Software Copyrights 4 Scope of Manual 4 Nomenclature 4 FCC Interference Warning 4 Safe Handling of CMOS Integrated Circuit Devices 5 Description 6 Features and Benefits 6 Physical Description 6 Front Panel 7 Programming Switches 7 Front Panel LEDs 7 Line Level Adjustments 7 TX Adjustment 7 Line DRV Adjustment 7 BAL Adjustment 7 Rear Panel 7 Operation 8 Operational Description 8 Front Panel LED ...

Page 3: ...P1 8 11 PTT Output P1 13 Active High P1 6 Active Low 11 Monitor P1 14 Active High P1 7 Active Low 11 F2 P1 15 11 Accessory Connections 12 Line Connections 12 SW1 Switch Positions 14 Jumper Positions 15 Line Input Gain Select Switches 15 Level Settings and Adjustments 16 Line Drive Level 16 Transmit Level 16 DC Threshold Calibration 16 Balance Adjustment 16 Theory of Operation 17 Power Supply 17 DC...

Page 4: ...mission from GAI Tronics Scope of Manual This manual offers descriptive data and service information for the Model IDA1000A DC Remote Adapter Service diagrams and printed circuit board details are a part of this service manual Nomenclature The model number located on the nameplate on the bottom of the unit specifically identifies GAI Tronics equipment If additional options are ordered the option w...

Page 5: ...he circuit module When servicing a circuit module avoid carpeted areas dry environments and certain types of clothing silk nylon etc because they contribute to static build up Similarly disconnect the test probe prior to removing the ground lead All electrically powered test equipment should be grounded Apply the ground lead from the test equipment to the circuit module before connecting the test ...

Page 6: ...logic control The Model IDA1000A is flexible for many radio systems Outputs can be individually selected to go active high or to ground depending on the radio accessory port easily connects other devices such as a local desk set and telephone interconnect modular phone line connection on back provides easy to install phone line cable connection ac or dc capable uses power from radio or ac source u...

Page 7: ...uminates when the Model IDA1000A is in monitor mode The F1 and F2 LEDs indicate current frequency and or other functions Line Level Adjustments TXAdjustment The TX adjustment pot sets the level of the transmit audio to that required to properly modulate the base station s transmitter see the Transmit Level section for adjustment instructions LineDRVAdjustment The LINE DRV adjustment is used to set...

Page 8: ...being input to the station Receiver audio from the base station is amplified before being output to the wire line Five LED function indicators are included on the front panel When illuminated they indicate wire line push to talk command a monitor command and presence of 5 V dc power Two LEDs indicate detection of line current levels of 5 5 mA F1 or 12 5 mA F2 Front Panel LED Operation The operatio...

Page 9: ...company Mounting The Model IDA1000A can be installed in a custom supplied rack or cabinet with XAC0005A Rack Mount Kit or can be placed on a desk for convenience when used with accessories FCC Interference Warnings The FCC requires that manuals pertaining to Class A and Class B computing devices contain warnings about possible interference with local and residential radio and TV reception Please r...

Page 10: ... should be installed at the point where the phone lines enter the radio equipment building Primary protectors are usually required by local codes and should be provided by your local exchange carrier The Model IDA1000A has an over current phone line fuse F2 that protects against occasional extreme fault conditions that may get past the primary protectors An example of such a fault condition is a p...

Page 11: ... capacitor s side and is connected to the station transmit audio Common mode noise is detected by internal circuitry correcting the mic high signal The return P1 4 should connect to mic low or station audio ground The reference output is 80 mV ac into 560 Ω DuplexControl P1 2 This is an input that routes radio supervisory talk permit and button acknowledge tones to the adapter Connect to RX audio ...

Page 12: ...d functions as described above Input and output signals are opposite those of the radio connections Line Connections The landline RJ11 RJ14 connector to J1 is polarity sensitive Wire the modular connector as follows NOTE RJ11 pins are labeled 2 through 5 Pin 2 is on the right hand side looking into the modular connector Pin 3 dc control negative and 4 dc control positive for TX RX operation Pins 2...

Page 13: ...alk O I active low GND B unkeyed 0 V dc 7 Orange monitor O I active low GND B unkeyed 0 V dc 8 Red F1 O I JU15 low 0 V dc or high 5 V dc 0 V dc 9 Red Wht dc not used JU13 power input 0 V dc 10 Grn Wht not used 11 Grn Blk RX audio I O 12 Blue TX audio Mic Hi O I 32 mV 800 mV RMS 560 Ω 80 mV RMS 13 Blu Blk PTT push to talk O I active high B GND unkeyed B V dc 14 Org Blk monitor JU11 O I active high ...

Page 14: ... default Line input range 400 mV ac to 1 7 V ac Line input range 1 7 V ac to 4 5 V ac 4 Down Up monitor function enabled only for duration of monitor command default monitor function remains enabled after receiving a monitor command and until a transmit command is received 5 6 5 6 down 5 6 up 5 down 6 down special application neither frequency is selected during receive condition default radio rem...

Page 15: ...cial applications only Indicates the default positions Line Input Gain Select Switches For SW1 sections 2 and 3 the default setting is down These should be changed only if one of the remote units has wire line losses of 10 dB or more Select a gain setting to compensate for the unit with the most loss Adjust all other units to give identical transmit levels To make adjustments 1 Apply a 1000 Hz ton...

Page 16: ...rovide the desired reference level across the audio control line at the desk set end normally 10 dBm 2 Adjust Pot 2 the adapter TX level pot to obtain 2 3 system deviation from the base station transmitter If it is not possible to obtain the correct level near the center of the control s travel use the opposite position for Gain Select SW1 2 DC ThresholdCalibration The dc threshold level is factor...

Page 17: ...th from the wire lines to the station drives Q1 Q6 and thus forces transmission on F1 in a multi frequency station and forces Q3 Q8 to output an active low high on the push to talk line The low at U7 1 disables the receive audio path from the station when SW1 section 8 is down In a 2 frequency station a high on U6 7 drives Q2 Q7 through NOR gates U9b and U9c and thus forces transmission on F2 The ...

Page 18: ...ating a current that the IDA1000A uses for keying the radio radio keyed constantly while the IDA1000A is connected Ensure that the PTT is in the proper active state P1 6 Ground keying P1 13 B keying RX audio low or distorted Ensure that the IDA1000A receive sensitivity is set properly Ensure that there is no more than 20 dB loss in the telephone line constant white noise in RX audio Obtain RX audi...

Page 19: ...structions NOTE A purchase order or credit card number is required prior to processing non warranty repairs Ordering Replacement Parts Please include the complete identification number when ordering replacement parts or requesting equipment information This applies to all components kits and chassis If the component part number is not known the order should include the number of the chassis or kit...

Page 20: ...put 25 to 0 dB ALC to reference nominal 10 dBm Line output 15 to 10 dBm adjustable into 560 Ω nominal 10 dBm Maximum desk sets supported 10 maximum per system design DC current defaults F1 5 5 mA F2 12 5 mA Monitor 2 5 mA Definitions and Acronyms Term Definition CSQ carrier squelch CTCSS a means of grouping users of a common radio channel Subaudible tones are transmitted with audio a particular ra...

Page 21: ...3004 027B Model IDA1000A DC Remote Adapter Installation and Service Manual Page 21 of 24 P Radio Products Current Release 43004 43004 027B 43004 027B docx 06 18 Main Circuit Board Figure 7 Main Circuit Board ...

Page 22: ...ub 43004 027B Model IDA1000A DC Remote Adapter Installation and Service Manual Page 22 of 24 P Radio Products Current Release 43004 43004 027B 43004 027B docx 06 18 Schematics Figure 8 Schematic Sheet 1 ...

Page 23: ...Pub 43004 027B Model IDA1000A DC Remote Adapter Installation and Service Manual Page 23 of 24 P Radio Products Current Release 43004 43004 027B 43004 027B docx 06 18 Figure 9 Schematic Diagram Sheet 2 ...

Page 24: ...Pub 43004 027B Model IDA1000A DC Remote Adapter Installation and Service Manual Page 24 of 24 P Radio Products Current Release 43004 43004 027B 43004 027B docx 06 18 Figure 10 Schematic Diagram Sheet 3 ...

Page 25: ... of the Contractor s personnel from the work site Re performance of services shall be Buyer s sole and exclusive remedy and in no event shall GAI Tronics warranty obligations with respect to services exceed 100 of the total cost of the services provided hereunder Warranty Periods Every claim by Buyer alleging a defect in the goods and or services provided hereunder shall be deemed waived unless su...

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