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<DIV>Hi All,</DIV>
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<DIV>This may have been covered before, but here’s my idea for a software
addition...</DIV>
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<DIV>I use my Mercury receiver often as a spectrum analyzer to measure my final
linear’s IMD. (3-1000z, 8877, etc) I sometimes like to compare one
amplifier against the other to see the effects on drive, loading and other
parameters. After some testing, we can usually find the sweet spot and then know
where to run the amplifier for cleanest operation.</DIV>
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<DIV>With the present PwrSDR software, it is difficult and time consuming on the
fly to interpret the IMD without counting grid lines, etc. A nice feature
to have would be to be able to set a distance from the main signal and see an
ongoing numerical reading of how far down in db this level is. For
example, if your transmit signal is on 3700 using a two tone – and we
punch in 3703 as the test point, a readout might show the side trash signal 3khz
away is –35db. By changing various amplifier parameters, we could
see the best settings as this number changed. Moving out farther, like
5kc, etc could start to show the rough 5th, 7th order, etc IMD numbers.</DIV>
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<DIV>I understand that a Cyclops spec analyzer is coming out, but could this
feature be considered for the PWRSDR software so that the Mercury could use it
too?</DIV>
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<DIV>Or is there a way to do this now that I am missing? What do you
think?</DIV>
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<DIV>Thanks.</DIV>
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<DIV>Tom, K1JJ</DIV>
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