Chris wrote:
If I read this correctly, I'm looking at
9,999,999.97 Hz ?
Correct -- the small digit to the right is the exponent. As others
have mentioned, by holding the UP arrow key in for about 3 seconds,
the 1992 will switch to a 10-second gate and give you one more digit
of resolution, but you don't need that for this job. BTW, the manual
for the 1992 is pretty widely available on the web.
My EFC mapping looks like this (this was done before
I adjusted the coarse control)
-4.94 VDC 9,999,999.95
* * *
0 VDC 9,999,999.93
* * *
+4.90 VDC 9,999,999.90
How and where are you measuring the EFC voltage? Are you sure the
voltage on the EFC pin of the 10811 (Pin 6) was the same as you
measured? Was the EFC return pin (Pin 5) connected to the oscillator
supply return (Pin 4)? If it is left floating, the EFC will not work properly.
Best regards,
Charles
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