On Tue, Aug 27, 2024 at 10:38 AM, Donald Schneider wrote:
On the VARA FM screen the Audio Input goes from -96db to blank when I hit the TUNE button.? But I am not seeing any audio input from the radio even on the Weather channel where there is audio.
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Donald -
Since the radio is keying when you click the TUNE button in the VARA FM modem program, and a local ham confirms that there is (some) audio when you do this, it's pretty certain that the PTT connection and transmit-audio connections from the SignaLink to the radio are working.?
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Also, in order for your SignaLink to activate PTT on your radio, the USB connection between your computer and the SignaLink is passing transmit audio. The transmit-audio signal drives the VOX circuit in the SignaLink, to activate PTT on the radio.
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Not seeing any audio on the VARA FM VU meter may be due to your SignaLink being jumpered for "1200bps data" and the radio radio-interface cable being wired for "9600bps" operation, or vice-versa... The correct configuration depends on how the radio-interface cable is wired- does the cable have wires for both the "9600bps data" (pin 5 "DATA OUT") and "1200bps data" (pin 6 "AF OUT") receive signals out of the mini-DIN8 radio 'DATA' socket.
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The only ID-800H cable I see on the Tigertronics/SignaLink website connects to the radio mic connector, and is definitely only for 1200bps opoeration... Do you have any details on how your cable is wired? Who did you buy it from?
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In any case, unless the cable has wires for both 9600bps and 1200bps operation, the jumpering inside the SignaLink must match what is supported by the cable.
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Additionally, make sure the radio "BPS" setting matches what your radio-interface cable and SignaLink jumpering is configured for (having the wrong 'BPS' setting could be of your low transmit-audio level):?
Also note that you'll want to disconnect the microphone while doing VARA FM operation if you radio / cable / SignaLink are set for 1200bps operation.
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Mark - AD7EF
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Mark Davis