At the beginning of the E1938A project, I did some humidity
tests on the 10811. It was fairly sensitive to humidity.
I think I remember being able to get parts in 10^8 shift.
...
At the beginning of the E1938A project, I did a bunch of
characterization of 10811 oscillators. At the Santa
I have a Spectracom 8140 frequency distribution amp.
I see on ebay there are line taps for this device. Do
I need the line taps? Or can I just use the 8140 as
is? What are the line taps supposed to do?
Jamie
Hi,
The 1PPS output signal on pin 3 is very short,
about one microsecond long. On my unit around
800nS only.
--
Message: 3
Date: Mon, 18 Feb 2008 18:37:42 +0800
From: bbobb mokai [EMAIL PROTECTED]
Subject: [time-nuts] FE-5680A Rubidium Pinout again
To:
Hi,
Saw the posts on humidity and hermetic oscillators.
I have an HP 10811-60159 hermetic oscillator on ebay 320219546412 if
anyone is interested.
Also a lot with a bunch of Dud oscillators.
Corby Dawson
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time-nuts mailing list --
jshank said the following on 02/18/2008 03:05 PM:
Jamie,
If you have the Spectracom 8140 you need to use the line taps. With out
using the line taps you sinewave will not be symmetrically along 0 voltage,
that is the sine wave will all be positive voltage.
I'm not certain about that;
Jamie,
If you have the Spectracom 8140 you need to use the line taps. With out
using the line taps you sinewave will not be symmetrically along 0 voltage,
that is the sine wave will all be positive voltage.
The line taps were available in 10 MHz, 5 MHz, 1 MHz and 0.1MHz.; what that
means,
The long term aging rate is due entirely to the crystal,
for all practical purposes, for any well designed oscillator
circuit (or even a mediocre design). The aging of the
crystal is basically not predictable. It's like the famous saying
by J P Morgan when asked what the stock market will do:
It
Hi All
I'm looking for any information, hopefully a manual, for what HP labelled as
the 8660-K11 10MHz Ref.Gen which actually looks to be a phase comparator
that compares an external 10 MHz signal with an internal HP10811 reference.
There are other 8660-K** units, certainly at least the
John Ackermann N8UR wrote:
jshank said the following on 02/18/2008 03:05 PM:
Jamie,
If you have the Spectracom 8140 you need to use the line taps. With out
using the line taps you sinewave will not be symmetrically along 0 voltage,
that is the sine wave will all be positive voltage.
Today's astronomy picture of the day says that future experiments in the
new ISS Columbus laboratory include an atomic clock to measure miniscule
timing effects:
http://antwrp.gsfc.nasa.gov/apod/ap080219.html
Does anyone know somthing about the sort of clock they're going to put
in the
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