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Re: LF: IEEE488

To: <[email protected]>
Subject: Re: LF: IEEE488
From: "Martin Evans" <[email protected]>
Date: Sat, 12 May 2012 19:27:13 +0100
References: <A318522BCED445EAB5653B1E0996A0EB@computereebf79> <CAA8k23RrP7Vq43ULg9YYK=a4KM6U6YBYD0DrBCeqR_2s6am+DA@mail.gmail.com> <99F3BE8C10254B3AAC3A81BA16DA2584@computereebf79> <3333EC45C262400BA932E210F3241223@JimPC>
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Thanks Jim - yes, this is what I'll do.

I just thought that keying the sig gen sounded a bit more elegant.

And I need only on-off keying, for CW and maybe OPERA, so relay keying it will be.

Martin  GW3UCJ.

~~~~~~~~~~~~~~~~~~~~~~

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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