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Re: LF: Re: Can you look for us tonight with OPDS on 74.3213?

To: <[email protected]>
Subject: Re: LF: Re: Can you look for us tonight with OPDS on 74.3213?
From: "Markus Vester" <[email protected]>
Date: Sun, 9 Feb 2014 14:50:50 +0100
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Dex,
 
fine - looking forward to try again, I reckon we'll need about 3 dB more. Unfortunately my antenna still won't be fully extended for a couple of days due to wind condx.
 
EDDS = enhanced deep deep search? It might be more efficient to try the 4 hour mode then ;-)
 
There's still a very slight frequency instability on the RX side: I'm tracking DCF77 to eliminate the FiFi-SDR's LO drift, but currently have no means to simultaneously correct for samplerate deviations. But I think the residual drift (about 1 mHz) is too small to affect opds-16 or -64 sensitivity in any way.
 
Best 73,
Markus (DF6NM)

Sent: Sunday, February 09, 2014 2:18 PM
Subject: Re: LF: Re: Can you look for us tonight with OPDS on 74.3213?

Markus Vester wrote:
> In past sessions, there were still weak DCF77 artifacts exactly on
> whole Hz frequencies. Even though these were not obvious in the higher
> noise last night, Dex' carrier might still have been slightly impeded.
> This could be cured by a small offset eg. moving 0.1 Hz down.
Markus,

My frequency is GPS locked so it should have been exactly on 74.323.  I
will run again tonight on 74.3229 if you are available for another
try.   I just changed the frequency and will let it run during the day
for you to try an EDDS test :)

Dex

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