Terminal Function; 8-Pin Connector - Kenwood TKR-751 Modification Information

1 TERMINAL FUNCTION

This section describes Input/Output terminals of the TKR-
750/850/751/851.
1.1

8-pin Connector

The 8-pin connector is located on the front panel of the
TKR-750/850/751/851. It can use as the microphone
connector for a base station usage and maintenance. You
No. Pin name Input/Output
1 NC
2 SB
3 GND
PTT
4
TXD1
5 MIG
6 MIC
HOOK
7
RXD1
8 NC
Version: 1.02 USA
--- No connection
Output Switched Battery Power Output/10.8 - 15.6 V/ 200m A max.,
Ground
Output PTT signal Input/ H=more than 4.0V/ L=less than 1.0V/Active L
PC serial data from radio (COM 1)/ CMOS level/ H=more than 4.0V/ L=less than 1.0V
Output
FPU read, PC Tuning, Firmware Programing
--- Microphone Ground
Microphone Signal Input/ 60% STD@5.0+/-2mV 1kHz input/ 600ohm Road/ 10uF AC
Input
coupled/ 300-3kHz +6dB/Oct. (EIA curve)
Input Hook Signal Input/ H=more than 4.0V/ L=less than 1.0V/ 5V pull up/ Active L
PC serial data to radio (COM 1)/ CMOS level/ H=more than 4.0V/ L=less than 1.0V
Input
FPU read, PC Tuning, Firmware Programing
--- No connection
Modification Information (MOD)
can write the configuration data into the TKR-750/850/
751/851 by connecting it to the PC with the KPG-91D.
1 2 3 4 5 6 7 8
Figure 1-1 8-pin connector
Table 1-1 Assigning signals to 8-pin connector
Description
1