Computer Automation Technology

Connecting a CAT to a Kenwood TKR-750 or a TKR-850 Repeater.

 

Connecting a CAT controller to a Kenwood TKR-750 or TKR-850 Repeater can be accomplished easily by following these two steps

 

Step 1 Build an interconnect cable with two Male DB25 connectors on both ends of a 6-wire conductor cable. Connect the pins as follows: (Note: a pre-built cable is available for purchase under CAT part number CA-750).

 

CatKtr750

The COR will be active high so dipswitch #1 should be set to the OFF position.

 

Step 2
Program the TKR-750 repeater using the configuration software supplied with the repeater.

PARAMETER
CONFIGURED AS
 Frequency  Required RX and TX frequency pair
 QT/DQT Dec.  Decoder Tone Frequency
 QT/DQT Enc.  Encoder Tone Frequency
 Ch Name  1
 Multi Table  No
 W/N  Wide
 Power  Low
 Op Mode  Duplex
 Scan Add  No
 CW ID  No

 

To set the repeater’s AUX Input/Output 5 accessory connector pin #24 as a COR output and the AUX Input/Output 6 accessory pin #25 as a TOR output click on (EDIT). From the drop down box click on (Function Port). Set the ports as shown in the table.

Function Port (AUX Select)
AUX Input/Output 1 AUX Input
AUX Input/Output 2 AUX Input
AUX Input/Output 3 AUX Input
AUX Input/Output 4 AUX Input
AUX Input/Output 5 AUX Output
AUX Input/Output 6 AUX Output
 
Function Port (AUX Output)
 
Function
Logic Type
AUX Out #1
None
 
AUX Out #2
None
 
AUX Out #3
None
 
AUX Out #4
None
 
AUX Out #5
None
 
AUX In/Out 5
COR
Active High
AUX In/Out 6
TOR
Active High

To disable the repeater’s internal timers click on (EDIT). From the drop down box click on (Optional Features). Set the Repeater/EXT-PTT timeout timer to (OFF) and the Repeater Hold Time to (OFF).


 

Notes:
None