On 6/2/20 3:24 PM, Tim Shoppa wrote:
Hal, at one point shortly after their discovery in the late 60’s, Pulsars were
considered as a possible primary frequency standard. Then atomic clocks became
more amenable as lab standards.
As to time-nut measurements on pulsars, check this out:
https://ar
Hi
Back in the 1970’s this was a fun dinner conversation with the JPL guys. It
always
seemed to end up with “in a year or two we’ll have it worked out ….”
Bob
> On Jun 2, 2020, at 5:49 PM, Hal Murray wrote:
>
> I watched the video of an astronomy talk yesterday. (Info below. I thought
> i
Hal, at one point shortly after their discovery in the late 60’s, Pulsars were
considered as a possible primary frequency standard. Then atomic clocks became
more amenable as lab standards.
As to time-nut measurements on pulsars, check this out:
https://arxiv.org/abs/0909.1054
Millisecond and
Hal,
This will keep you busy for an hour:
"Listening for Gravitational Waves Using Pulsars"
https://www.nasa.gov/feature/jpl/listening-for-gravitational-waves-using-pulsars
"Spotting gravitational waves using pulsar ticks"
https://www.pnas.org/content/pnas/113/32/8878.full.pdf
"Detection of Gr
On 6/2/20 2:06 PM, Tom Holmes wrote:
Frank...
What is interesting is that all of your traces appear to be identical except
for the vertical scale factor, which suggests that the ringing you are seeing,
which is much improved from your earlier plots, is still a little bit of a
problem. I am go
I watched the video of an astronomy talk yesterday. (Info below. I thought
it was good.)
During the Q&A, the speaker discussed the possible options for detecting
different wavelengths of gravity waves.
For very long wavelengths, she mentioned the possibility of watching pulsars.
Has anybody
Frank...
What is interesting is that all of your traces appear to be identical except
for the vertical scale factor, which suggests that the ringing you are seeing,
which is much improved from your earlier plots, is still a little bit of a
problem. I am going to guess that , as Bob pointed out,
Hi
There’s a lot more to setting this stuff up past the basics. Not all
attenuators have good return loss …. (and on and on). This quickly
gets pretty far of topic for Time Nuts. Simply keep in mind that the
measurement gear and measurement technique very much get
into the results of almost anyth
What, the names aren't self-explanatory? :-)
TADD-1 -- broadband (0.1 - >30 MHz) analog distribution amplifier
TADD-2 -- 5/10 MHz 6 channel divider (1k to 1 PPS)
TADD-2 Mini -- 1/2.5/5/10 MHz to PPS single channel divider; very tiny
TADD-3 -- 6 channel PPS distribution amplifier (no divider)
Puls
I'm trying to distinguish among all these options..
TADD-2 and TADD-3 are 5/10 in, multi out - 3 is just a new 2?
TADD-2 mini is 1,2.5,5,10 in and one out
PP has a way to solder a packaged oscillator on the board, lower power,
and puts out 1, 10, and 100pps.
___
Hello Anders,
I did the original design of the Crystek locked 1G CRO + 9912. Let me know if
you have questions.
br
Christophe
http://distrinet.cs.kuleuven.be/people/showMember.do?memberID=u0013167
prof. dr. ir. Christophe Huygens IMEC-KULeuven-DistriNet
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