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Problems with PTT via SmartSDR CAT (foot switch)
Hello!
My setup: Flexradio 6500, SmartSDR 3.2.39, Windows 10 21H2
I connected a foot switch for PTT to a serial port via SmartSDR CAT.
Sometimes the radio doesn't go on the air. There is no transmission power out.
But I can see the audio control and TX flag. See picture below.
If I then release PTT and press again, it usually works but not always.
Pressing MOX with mouse within SmartSDR does alway work.
Any idea?
Best Answers
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Update: This must be a timing bug within SmartSDR CAT.
As soon as I enable "logging" the failure disapears. Disable logging reenables the failure.
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I got the answer from the help desk which solved the issue:
>The CAT COM Port PTT was not originally designed for use with an external footswitch, though many have done this.
>The most common cause of the issue you report is "keybounce" on the footswitch causing inconsistent operation.
I put a 470 nF capacitor between the contact of the foot switch and got success.
1
Answers
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Good catch! Might be a good idea to submit a help desk ticket with this new info so that Flex can look into it.
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Some RS232/USB adapters are flakey. If you search on the Remote part of the community, you will find some discussion regarding it.
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anti-shake
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