> -----Original Message-----
> From: Bill Fuqua [mailto:wlfuqu00@uky.edu]
> Sent: Tuesday, August 15, 2006 8:54 AM
> To: Michael Tope; garyschafer@comcast.net; 'Joe Subich, W4TV';
> amps@contesting.com
> Subject: Re: [Amps] Checking for IMD
>
> Now we are back to my first suggestion. Use a good mixer and
> local oscillator to feed a sound card. If you don't need more than 20kHz
> bandwidth you don't need the quadrature oscillator and mixers which could
> extend it to 40kHz if the sideband rejection is sufficient to see the
> lower
> level IM products that you may be looking for.
> Also, since you will most likely be making measurements using a
> variable frequency TX you could use a crystal controlled oscillator at 4x
> the operating frequency and some D-type flipflops to generate the I and Q
> oscillator signals.
>
> 73
> Bill wa4lav
Hi Bill,
I assume that you are talking about using a quadrature mixer to get rid of
one side band? Seems like it should work.
73
Gary K4FMX
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