[BC] Frequency Measurements and 1000 Hz tone...

[Mark Humphrey]

As long as the tone frequency is stable (and each sideband's frequency
can be measured) one should be able to determine the tone frequency by
subtracting the RF frequency of the lower sideband from that of the
upper sideband, then dividing the difference by 2.

Mark

On 3/21/07, Glen Kippel <glen.kippel at gmail.com> wrote:
> I assume that the 1000-Hz tone does not have to be exactly 1000 Hz due to
> the fact that a cart may not be running at the correct speed.  Also, if a
> tone generator is being fed directly to air, wouldn't it would be necessary
> to use a frequency counter ensure that it is indeed running at exactly 1000
> Hz -- or is the exact frequency of the modulation of no import?
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