Hi Bruce,
That fixed it! The background would pop and shift levels even with no
antenna or signal generator connected. Quite annoying when listening to a
faint signal. Now that I got that taken care of, tonight I will work on
spur nulling and checking on the amplitude level readings (did not agree
with performance verified HP signal generator when I was testing it last
night).
The computer I am using is a Dell 3.06 Ghz machine with XP and 512 MB of RAM
so this should be fast enough.
Thanks again.
Chris
KD4PBJ
toggle quoted message
Show quoted text
----- Original Message -----
From: "Bruce Beford" <bruce.beford@...>
To: <softrock40@...>
Sent: Thursday, October 06, 2005 6:44 AM
Subject: [softrock40] Re: Softrock up and running but need a little guidance
Hi, Chris.
Re: The "popping sound" and shift in signal levels- (when you say
the signal level goes from -140 dBm to -50 dBm during these jumps, I
am sure you are talking about the background signal, not the output
of the signal generator itself.) This sounds like the Windows audio
driver issue that many of us have seen. Go to the Audio tab of the
PowerSDR Setup screen. Set the audio driver to MME, instead of
Windows DirectSound. Hope this helps.
73, -Bruce, N1RX
.--- In softrock40@..., "Chris Waldrup" <kd4pbj@b...>
wrote:
<snip>
Tonight I hooked it up to my 8640 generator and hear the tone
fine, but every few seconds there is a rapid succession of a few
clicks where the signal dies and then comes back. The signal
strength goes up from about -140 dBm to mid -50's. The LED does not
flicker at all during this (I had thought that the USB connector may
be loose) and I tried connecting the USB connector up to my wife's
new laptop and I get the same result. I also connected the radio up
to my antenna to rule out the generator acting funny and I get the
same result.
<snip>
Chris Waldrup
KD4PBJ
Yahoo! Groups Links
