Hi Martin, LF,
I have used relay keying using qrs.exe to key the output from my DDS VFO &
it was a very simple, stable & reliable method. The DDS VFO remained on all
the time. seems to me the way to go.
73, Gary - G4WGT.
----- Original Message -----
From: "James Moritz" <[email protected]>
To: <[email protected]>
Sent: Saturday, May 12, 2012 7:14 PM
Subject: Re: LF: IEEE488
Dear Martin, LF Group,
Provided you were happy with simple on/off keying, i.e. QRSS rather than
DFCW or the various mFSK modes, there is no need to interface the sig gen
to the PC. You could just connect the sig gen output via a relay or other
bit of gating circuitry, set the generator to the frequency you want and
key the relay with the QRSS software... Actually, for most types of TX, a
better idea is to leave the generator going constantly and key the PA
stage. I used to use an old Racal generator in this way.
Cheers, Jim Moritz
73 de M0BMU
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