TK 8160

[jcromin]

I am trying to get a COR signal out of a TK-8150 Kenwood transceiver. I am using Aux out 4 Pin 22 of the DB25 connector on back of the transceiver. It has COR selected. When the transceiver sees a signal input is the transceiver supposed output a voltage on Pin 22? How is the cor signal supposed to work? Does something else have to be configured in order to get a signal out?

 

[cmdrwill]

The output from the radio may be just an open collector. In that case you need to add a 'pull up resistor'. Usually a 4.7 k om resistor from the out put to 8 volts or so.

Depending on what you are using to 'see' the COR, it may have a pull up resistor in it that may need to be selected.

 

[ramal121]

The 8150, like most Kenwoods, will have a pull-up to 5 volts. So you will see change from 0 volts to five volts. The active level is selectable in software.

Now what do you want to do with the COR output? It is TTL logic and pretty whimpy. You can only drive high impedance inputs with this as they start to die if you try and sink more than a milliamp or two. Relays and the like are not in the cards.

 

[kd4efm]

J700 - 25pin connector TK-7150 Mobile

1 NC Non connection.

2 RXD2 * Serial data input 2. RS-232C level. Input voltage
range = ±30V max. L ≤ 0.4V, H ≥ 2.4V. Zi ≥ 5kΩ

3 TXD2 * Serial data output 2. RS-232C level.
L ≤ –5V, H ≥ 5V/3kΩ load. Zo ≤ 2kΩ

4 AO3 Auxiliary output 3 (Programmable). Active low
open collector (100mA max.) (Default none). L ≤ 0.3V

5 DI Data signal input (Capacitor-coupled). Z ≥ 10kΩ

6 MI2 External MIC input (Capacitor-coupled). Z = 600Ω

7 E Ground.

8 AO2 Auxiliary output 2 (Programmable). Active low
with 10kΩ pull-up to 5V (100mA max.) (Default
none). L ≤ 0.3V, H ≥ 4.8V

9 TXD3 ** Serial data output 3.
L ≤ 0.7V, H ≥ 4.2V/25kΩ load. Zo ≤ 1kΩ

10 RXD3 ** Serial data input 3.
Input voltage range = +5/0 max. L ≤ 0.8V, H ≥ 4.2V.

11 E Ground.

12 AI4 Auxiliary input 4 (Programmable). Active low
with 47kΩ pull-up to 5V (Default none).
L ≤ 0.8V, H ≥ 2.5V

13 AI2 Auxiliary input 2 (Programmable). Active low
with 47kΩ pull-up to 5V (Default none).
L ≤ 0.8V, H ≥ 2.5V

14 SB Power output after power switch. 13.6V±15%,
1.1A max. at 25°C, 0.8A max. at 60°C

15 TXS TX sense signal output. Active high with 10kΩ
pull-up to 5V. L ≤ 0.3V, H ≥ 4.8V

16 HR1 Horn alert signal output 1. 1A max.

17 AFO Filtered audio output (DC-coupled). Zo ≤ 1KΩ
PA : MIC signal output. 0.65Vp-p typ. (1kHz/5mV input)
RX : RX low level output. Wide : 1.3Vp-p typ.,
Narrow : 1.1Vp-p typ. (Standard modulation)

18 E Ground.

19 DEO Detected signal output (Capacitor-coupled).

20 AO1 Auxiliary output 1 (Programmable). Active low
with 10kΩ pull-up to 5V (100mA max.) (Default
none). L ≤ 0.3V, H ≥ 4.8V

21 AI1 Auxiliary input 1 (Programmable). Active low
with 47kΩ pull-up to 5V (Default none).
L ≤ 0.8V, H ≥ 2.5V

22 AO4 Auxiliary output 4 (Programmable). Active low
open collector (100mA max.) (Default none).
L ≤ 0.3V

23 HR2 Horn alert signal output 2. 1A max. (Default ground)

24 AI3 Auxiliary input 3 (Programmable). Active low
with 47kΩ pull-up to 5V (Default none).
L ≤ 0.8V, H ≥ 2.5V

25 ME MIC ground.

 

[ramal121]

Pin 22 is open collector at 100 mA. Thanks Evan, color me lazy for not breaking out the service manual. Been a while since I touched a X150.

Belay my previous post. You will have to supply a pull-up voltage through a resistor to see a change on your voltmeter.