[time-nuts] HP 10811 Response I Replies
Rick Karlquist
richard at karlquist.com
Sat Sep 24 16:01:59 UTC 2011
WarrenS wrote:
> Does your Mode B 10811 use a different xtral or same xtral, different
> frequency?
> What does Mode B do better, ... and worse?
> Why was it not used in the 10811?
Mode B is the same crystal on a different frequency
(about 10.95 MHz). It does not have a turnover and
the tempco is much higher than mode C. It makes
a very sensitive thermometer and is therefore useful
for evaluating the oven. The reason is not used in
a production 10811 is obviously that for timebase
use, you definitely don't want a high tempco.
Rick
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