[TenTec] OMNI-VI question

[Ken Brown]

If one has (or has access to) a synthesized signal generator, that can 
be set to the exact desired BFO frequencies with less than 1 Hz 
resolution AND accuracy, then there is no reason one could not listen to 
the beat between that signal generator and the BFO one is aligning to 
get +/- 1 Hz accuracy. It does not matter that the audio stages of a 
receiver don't pass sub Hertz audio frequencies, because you can hear 
sub Hertz modulation of noise. Any AM receiver that can be tuned to the 
BFO frequency can hear the beat between the BFO and the signal generator 
you are using as a reference. Getting the amplitudes of the reference 
signal generator and the BFO adjusted to be able to hear the beat may be 
a bit tricky.

Using that same method to adjust the 10 MHz reference oscillator you can 
also get it adjusted to within less than one Hertz of your reference 
signal generator.

If you are so unlucky as to have both errors adding (the cumulative 
error of your two adjustments) instead of cancelling, the whole system 
would still be within only a couple of Hertz of correct.

Sure, that is more effort than just looking at the readout of a 
frequency counter, but it is a valid and accurate method of 
accomplishing the task. Whatever method you use is completely dependent 
on the accuracy of your reference, be it the time base in a frequency 
counter or the time base in your synthesized signal generator.

DE N6KB


> I've said it before and been criticized but one needs a counter to resolve the required frequencies to 1Hz or better.  Confirming SSB USB & LSB frequency requires measurement, not listening.
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> Bob, K4TAX
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