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Re: 45Mhz crystal filter specification


 

I don't think you are seeing the LO frequency on the scan. You are
seeing a mixing product. The scan shows spurious responses at about
8Mhz, 18Mhz, and 31Mhz.

I'll check the other LO and the BFO to see what frequencies they show.
It might be that the 5351 is hosed.

I haven't tried the base software to see what happens. That is
something else I can do.

Till I figure out what is happening with the 45Mhz IF there isn't much
use in moving down the chain.

tim ab0wr

On Thu, 03 May 2018 18:26:11 -0700
"ajparent1/KB1GMX" <kb1gmx@...> wrote:

Something is mighty fishy.

Or the input frequency for the VFO as set should 3.915mhz.

48.915mhz -45.000= 3.915mhz

Try raising the signal generator from 3.8mumble to 3.915 and see if
things get better.

The LO for converting from 45 to ~12mhz if should be either 33. or
57. withoutly a few khz from those.? IF the SA is right that seems
off too.

Allison

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