Motorola GTX Interface
Motorola GTX Interface
The following items are included in the Motorola GTX interface kit:
1. GTX interface cable assembly.
2. Cable tie.
3. Instruction sheet.
The following steps outline the procedure for interfacing the Motorola GTX radio to the
TrakIt-20.
1. Set the TrakIt-20 up for a bench test and use the AVL Installer program to set the
following operating constants in the installer table to the indicated value:
Transmit indicator active:
Receive indicator active:
PTT output active:
Enable Tx indicator as event 2:
External output active:
External output mode:
High
Low
Low
No
Low
Speaker mute
2. Configure the following jumpers as indicated:
JP1
JP4
Removed
B-C
3. Remove the control head, the top cover, and the main board of the GTX radio by
following the instructions in the GTX service manual.
4. Pass all the free wires of the GTX interface cable through the same hole in the
accessory connector gasket and slide the gasket up the cable and out of the
way.
5. Pass the white, red, and green wire from the GTX interface cable through the
accessory connector hole in the radio chassis before connecting them to points
internal to the radio.
6. Locate R0404 and R0405 on the bottom of the main board. Solder the white wire
to the side of R0404 that is connected with a trace to R0405.
7. The red wire of the GTX interface cable should be soldered to the mounting tab
of Q0611 on the top of the main board.
8. The green wire of the GTX interface cable should be threaded through the
chassis opening provided for the flat cable from the control head. This wire
should then be soldered to the pin of Q0943 that is connected with a trace to
R0945 on the control head.
9. The red and black wire of the GTX interface cable should be soldered to the
junction of R0401 and R0402 on the bottom side of the main board.
Motorola GTX Interface (cont’d)
10. Secure the main board and replace the control head and the top cover. Insert the
remaining wires of the GTX interface cable into the radio’s accessory connector
as follows:
Pin #
2
3
7
11
Wire
Blue
White/Black
Black/Shield
Orange
11. Secure the GTX interface cable to the accessory connector with the cable tie
strap. Connect the accessory connector to the radio and slide the accessory
connector gasket into place.
12. Connect the DB-15 end of the GTX interface cable to the DB-15 connector on the
back of the TrakIt-20.
13. Check the TrakIt-20's audio levels by performing the alignment procedure
described in this manual.
2
Motorola GTX Interface (cont’d)
Motorola GTX Interface Cable Kit
106-TRCBLGTX
Item
1
2
3
4
5
6
Description
Part No.
Qty.
CABLE TIE (SHORT)
SCREW/CLIP KIT
CONN DB15 MALE
COVER DB15
AMP, PINS
CBL, 8 CONN 22 AWG STR
200-0081
231-0014
231-0035
231-0036
234-0096
800-1114
1
1
1
1
4
1’
3
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising