USB Communation RXTX with PowerSDR on Win10
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Has anyone seen problems with an Ensemble RXTX when using PowerSDR software running with Windows 10 commutating with the USB port. Specifically, when everything is setup correctly (say 20M FT8 14.074 MHz, soundcard and software) and waterfall shows FT8 signals received, then when PowerSDR Tune button is pressed of the WSJT-X software tries to Transmit the RXTX start to output a RF signal to the antenna then immediately I get an error message from PowerSDR "USB Device Not Found (-1)" .
This error (USB Not Found) would pop up every other time I was using the RXTX with PowerSDR and WSJT-X FT8 Digital Mode on 20 or 40M. When working I made lots of contacts using an End Feed Long wire antenna and a 1:9 Unun. For the last week the same configuration that had been successful fails every time. The RXTX USB connection seams to respond to all commands correctly except when PTT is activated. Assuming the problem is with the RXTX, what could cause it to drop USB communation after PTT? I am driving the RXTX close to max power, but using IQTester app and CFGSDR utility the RXTX will drive close to 1W into a dummy 50 ohm load with no problem. It used to work and now it doesn't can any one help? Robert, KI5HBO |
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Alan,
I did try a 50 ohm dummy load and most of the time the combination of PowerSDR with WSJT-X did successfully drive power into the dummy load when the Turn button was used on WSJT-X. Using PowerSDR alone, I had to set the TX Drive power option to a low value of 10 and then the Tune button on PowerSDR? would drive the dummy load without causing a USB Not Found error. The antenna was indeed compromised, the lawn service weed wacked the ground line loose. Now I have to look for any other antenna problems. I am still worried about why the hardware and software were working successfully together two weeks ago and I was making contacts using FT8 all over North America with less than one watt. Any other suggestions would help, Robert, KI5HBO Sent from Mail ( ) for Windows 10 *From:* Alan G4ZFQ ( alan4alan@... ) *Sent:* Thursday, October 1, 2020 10:34 AM *To:* [email protected] *Subject:* Re: [softrock40] USB Communation RXTX with PowerSDR on Win10 WSJT-X software tries to Transmit the RXTX start to output a RF signal to the antenna then immediately I get an error message from PowerSDR "USB Device Not Found (-1)" . what could cause it to drop USB communation after PTT? I am driving the RXTX close to max power, but using IQTester app and CFGSDR utility the RXTX will drive close to 1W into a dummy 50 ohm load with no problem.Robert, Has anything changed with the antenna or radio setup? The symptoms you describe suggest RF getting into the USB line. Seems unlikely with just one watt, how does it work with WSJT driving it but into the dummy load? 73 Alan G4ZFQ |
Robert George