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Old 12-06-2017, 11:35 PM
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Default VX 2500 DB9 connector

Good Evening everyone.

I have a Vx2500 programmed up for use. I have the radio programmed for the DB 9 connector as well to get audio from so the user can use that audio to feed a logging program on a PC. However when i monitor the audio from pin 2 of the DB 9 connector it does feed the audio to the logger but also feeds static between the transmissions as well. Am i correct in assuming that the audio from pin 2 of the DB 9 connector is picked off before the squelch circuit? or am i just missing something in the programming?

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Old 12-07-2017, 2:11 PM
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Maybe need to select Filtered/Squelched audio.
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Old 12-07-2017, 3:53 PM
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Thanks for the reply.

Yes i did try the setting for the filtered audio but still doesn't have a squelch to it. It's still just continuous audio whether it be static or an actual transmission coming through.
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Old 12-10-2017, 6:56 PM
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No one has any thoughts?
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Old 12-10-2017, 7:35 PM
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Maybe wrong pin on the DB9 connector, and I do not have the pin out here to check.

And the filtered squelched audio is near line level and not affected by the radio's volume control.
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Old 12-12-2017, 1:04 AM
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Thanks for the reply

Pin 2 of the db9 is the Output RX Discriminator. However depending on which JP is enabled. I've tried both JP3 which is the setting for the flat audio, as well as JP4 which is for the filtered audio. From the factory JP3 is always closed and JP4 is open. I've tried JP3 and JP4 and still don't get any squelch at all. it's like the squelch is constantly open.
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Old 12-12-2017, 1:39 PM
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Correct observation, the audio is NOT Squelched.
You will have to find a point in the radio that has filtered and squelched audio.
Or use the Pin 1, Output Logic Squelch, and a audio gating circuit external to the radio.

I do not have the roadmap for the VX2500, or I would look into finding a audio point.
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Old 12-13-2017, 12:38 PM
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Thanks

I kinda figured in these cheap little vertex radios that the rx discriminator output audio wasn't going to be squelched, but i my limited dealing with these radios i decided to ask the question. But i wonder for future reference it it might just be worth picking off the audio at the input to the Audio IC before it's amplified to the speaker. That may be something i have to try in the future if i just want to play around.


I have solved my own problem anyway. I won't use the vertex to pick off the audio. i have decided to use a Motorola GM300 for that purpose where i just needed to place the connectors on pins 11 and 9 of the accessory connector and all was good to go straight away.

Thanks for the replies
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