Greetings. I've got a Spectracom 8171A WWVB clock, and an 8164 WWVB
Frequency Standard, but am lacking the manual on the clock. I'm looking
for the pin connection information for the 15 pin Molex connector on the
back of the clock unit that receives the demodulated time code from the
Frequency
Thanks, Brian. That's very helpful. I looked at the schematic and the
cap they are using for LTC is 8uF that's simply put between the input
and the output of the op amp module.
I guess the question is whether the leakage causes any stability
problems, or just a constant offset. Time for some
John-
I have seen the same effect on my HP-5060A. I had attribute it to
leakage in the loop filter capacitor.
Should you find that you need to replace that cap in your standard,
you might want to try some of the very low leakage current caps from
WIMA in Germany. If you're in a pinch I have a c
If a capacitor is used for integration then there should only be
a phase offset unless it is really leaky. The integrator is inside
of a feedback loop, so that internal effects should be able to be
removed - except that capacitor leakage causes an offset that
must be compensated by more phase error
there is some leak-current or offset in the integrating amplifier. Suspect
the amplifier itself as well. Try to do the integrating amplifier adjustment
procedure. Eventually modulator phase needs a little bit adjustment. Be
aware that a instrument connected to control output could cause a similar
e
Poul-Henning Kamp wrote:
In message <[EMAIL PROTECTED]>, Brooke Clarke writes:
I got my 5061A trimmed to the point where a 5 day run against GPS
showed an offset of less than 1x10e-13. I then switched the unit into
the long time constant mode and now see that the offset (over 36
hours) is -1.7
In message <[EMAIL PROTECTED]>, Brooke Clarke writes:
>> I got my 5061A trimmed to the point where a 5 day run against GPS
>> showed an offset of less than 1x10e-13. I then switched the unit into
>> the long time constant mode and now see that the offset (over 36
>> hours) is -1.7x10e-12. Not
Brooke Clarke wrote:
Hi John:
My guess is that changing a time constant may be something like
switching in a capacitor. That may cause some ringing that may last
days to weeks.
I thought of that, but the offset seems (over 36+ hours) to be pretty
consistent without any sign of wobbling around.
Hi John:
My guess is that changing a time constant may be something like
switching in a capacitor. That may cause some ringing that may last
days to weeks.
Have Fun,
Brooke
John Ackermann N8UR wrote:
This is very odd (I seem to be collecting these sorts of problems) and
I wonder if anyone else
This is very odd (I seem to be collecting these sorts of problems) and I
wonder if anyone else has seen something similar.
I got my 5061A trimmed to the point where a 5 day run against GPS showed
an offset of less than 1x10e-13. I then switched the unit into the long
time constant mode and now
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