I'm trying to get my node going again. It's online but I'm fighting bad echo.
You hear the output looping into the input with a delay about the length of the word "One".
So in a count you hear "ONE one TWO two " ...etc Confirmed with parrot.
It's not local RX getting into TX, it's internal to the URI soundcard/cable/rx.
I've tried with both rxboost on/off and re calibrating.
It's not RFrelated as it does the echo with the TX turned off.
Radios are a pair of Motorola SM50's connected via 16pin to the URI.
They go into a 4 can duplexor into the antenna.
Audio is flat raw discriminator for the RX and direct to the modulator/ptt.
The same radios/cavities worked just fine with a dvrptr to do d-star.
The cable I used is a 25 pin Printer cable that is shielded /twisted pair.
I just cut off one end, traced the wires and soldered them to the 16 pin.
I've tried 2 different PC's with ACID then DIAL distro's. Still same echo.
If you would like a demo I'm node 2090 (W9DRR)..
Wondering where to look, it's almost like a software mixer thing or something.
I just tried to call your node and received, "connection failed." When you say, It's not local RX getting into TX" could you please explain what test(s) you did to arrive at this conclusion?
Thanks,
N5ZUA
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On 1/8/2017 7:21 PM, Don Russell wrote:
I'm trying to get my node going again. It's online but I'm fighting bad echo.
You hear the output looping into the input with a delay about the length of the word "One".
So in a count you hear "ONE one TWO two " ...etc Confirmed with parrot.
It's not local RX getting into TX, it's internal to the URI soundcard/cable/rx.
I've tried with both rxboost on/off and re calibrating.
It's not RFrelated as it does the echo with the TX turned off.
Radios are a pair of Motorola SM50's connected via 16pin to the URI.
They go into a 4 can duplexor into the antenna.
Audio is flat raw discriminator for the RX and direct to the modulator/ptt.
The same radios/cavities worked just fine with a dvrptr to do d-star.
The cable I used is a 25 pin Printer cable that is shielded /twisted pair.
I just cut off one end, traced the wires and soldered them to the 16 pin.
I've tried 2 different PC's with ACID then DIAL distro's. Still same echo.
If you would like a demo I'm node 2090 (W9DRR)..
Wondering where to look, it's almost like a software mixer thing or something.
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