0 = 5khz
> 1 = 6.25 khz
> These seem to work/match up with the RSS's calculation for a given
> frequency.
> I've never seen b0 change from a 1, or b6 change from a 0 in this
> byte for any frequency I've entered via RSS. If these two bits have
> a function related to frequency/VCO control, I havent discovered it.
The X apparently supports at least three reference frequencies. The
fourth bit combination is even more mysterious. I have never actually
put a counter on the appropriate pin and played with the two bits in the
X to see what was being generated, and I've never been able to locate a
data sheet for that chip. The X documentation doesn't mention the 4166
frequency, at least not in the -O version of the high band manual, nor
does it mention the unused combination, so in effect there are two bits
but only one is really adjusted by real RSS. It's possible that other
band radios do use one or both of the other combinations.
Since that circuitry is on the RF board, it seems likely that the
function should work in the same way for the X9000 as in the X.
X factory default reference frequency for high band seems to have been
5000. Low band, UHF ranges 2-5, and 800 seem to have been 6250. I
don't have a factory UHF range 1 plug. We should probably check for
similar in the X9000.
De
