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Tk-7180 RX Audio is not going out to DB25 PIN 17
- Thread starter n7dmr
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mmckenna
I ♥ Ø
Pin 17 is "AFO", audio frequency filtered output. It should be giving you received audio output at about 700mV p-p.
Pin 19 is the DEO, Detector output. 740mV p-p output.
You shouldn't need to do any programming to get either pin to work. Since Pin 17 is a filtered output, make sure you don't have a CTCSS/DCS tone set.
Pin 19 is the DEO, Detector output. 740mV p-p output.
You shouldn't need to do any programming to get either pin to work. Since Pin 17 is a filtered output, make sure you don't have a CTCSS/DCS tone set.
Regardless of whether your decoding signaling like PL/DPL on the radio you will still get audio out of Pin 17, or you should anyway.
Pin 17 (AFO) and Pin 18 (GND) should give you audio unless your filtered audio output is damaged some how.
I am connecting TK-7180 to PK-96 TNC. I was using audio from PIN 19. However, the performance is bad that 1/3 of packets won't decode. So I am testing out RX Filtered Audio. However, I can't get any audio out of PIN 17.
1200
Ok. I tried it with SignalLink. I do get audio out of PIN 17 with PIN 18 connects to the ground. I guess TNC doesn't want to take the ground for audio.
Ok. After testing, I find out Audio did come out of PIN 17. However, it is very weak. Is PIN 17 controlled by volume?
It is not controlled by volume it is at a fixed level as is Pin 19 that you also tried. Audio controlled by volume would be speaker output audio.
mmckenna posted the fixed output levels, but the service manual i have says Pin 19 (Detector output) is 280mv peak to peak not 740mv.
mmckenna
I ♥ Ø
The Kenwood TK-2180/7180 modification manual v2.10, dated May 2006 shows:
17 AFO Output RX Filtered Audio Output DC coupled, AF low level output 700 mVpp typical while receiving standard modulated signal.
19 DEO Output Detected Signal Output DC coupled, 740 mVpp typical while receiving standard modulated signal.
The TK-7180H/TK-7182H service manual from 2005 shows the same thing.
Yes your right... I had NX-700 on the brain, was doing some fire station paging stuff for a fire station the other day changing out a tk-7150 for a nx-700 and well all that **** ends up melding together when you work on radio daily......
700 mVpp and 740 mVpp doesn't look like very different. However, PIN 17 output almost can't drive the speaker. Not sure why
Pin 17 isnt supposed to be able to drive a speaker, thats what the speaker output is for.
Also, for whatever reason PIN 19 could drive the speaker. Not sure why
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