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There's no way of protecting Mercury from excessive power from PowerSDR or any PC software. Mercury can probably take 100 mW or so, maybe a bit more, but you need some real hardware to provide effective protection. The ADC overload point (at which it begins to clip) is near 1 mW (0dBm) --a bit higher with preamp off, a bit lower with preamp on). I'd recommend a relay (WITH GOOD ISOLATION!) connected to disconnect Mercury from the antenna & transmitter, AND short Mercury's input.<br>
73,<br>
Dave<br>
WA8YWQ</P>
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<B>On Thu 08/27/09 6:30 AM , Jeff Cook jeffrie@talktalk.net sent:<br>
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*Anthony Taylor* anthonytaylorengg at yahoo.com <br>
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/Wed Aug 26 23:29:15 PDT 2009/<br>
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Hello folks,<br>
<br>
I wanted to find out if mercury can be muted/disabled via powersdr during transmit to prevent ADC overload?<br>
<br>
73s,<br>
<br>
Tony<br>
<br>
<br>
Bill Tracey will know the answer to that one Tony, but what you could do is to place a relay such that it short-circuits the input to Mercury <br>
when Penelope is in transmit mode. I hope I'm not kidding myself into thinking that I've protected my ADC by doing this.<br>
<br>
73s<br>
<br>
Jeff Cook, G0AFQ.<br>
<br>
<br>
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