So, your PPS wander is measured by the GPSDO internal TIC and the
result is sawtooth corrected and usually gives 6ns, suddenly it went
to 25ns. Well, the first move, IMO, is to connect an external TIC and
track the GPS PPS against the GPSDO PPS and see whether, when you have
the jump, it is
On Mon, 19 Jan 2015 08:59:58 -0500
Bob Camp kb...@n1k.org wrote:
The most basic way to do phase noise in the basement is with a single mixer
setup running into some sort of audio FFT device. A sound card can be used or
an audio spectrum analyzer. Parts are $100 to get one setup once you can
On Sun, 18 Jan 2015 22:59:57 +
Mark Sims hol...@hotmail.com wrote:
http://www.princeton.edu/main/news/archive/S42/13/37M75/index.xml
Not much detail there... but there is an article in Science.
It looks like the supplemantary material[1] of the paper isnt behind a pay wall.
On Sun, 18 Jan 2015 22:59:57 +
Mark Sims hol...@hotmail.com wrote:
http://www.princeton.edu/main/news/archive/S42/13/37M75/index.xml
Not much detail there... but there is an article in Science.
This maser is basically a variation of the quantum cascade laser,
using tunable quantum
Hello,
I have both the HP3048A and Timepod Phase Noise test Sets.
I have two low noise 100 MHz PLL's. The 100 MHz output is locked to a 10
MHz reference input.
I want to measure their phase noise. Their spec is -100 @ 10 Hz with a -168
noise floor.
I connect both 100 MHz outputs to the
Hi,
Following the tests results in the previous email, today I've performed
additional measurements showing that the repeatability of the GPSDO DUT is not
great but is coming from the design. I've tested several over sources and
repeatability is correct.
I can already make some measurement.
I ran into a nice Oscilloquartz 2200 digital clock / precision crystal
oscillator from the early 80's that is in need of some care.
Please let me know if you have any manuals / data sheets / catalog pages
or other information to share.
At the moment I'm working on the faulty power supply. Any
Martyn:
Two things to be aware of:
Injection Locking and loop dynamics.
Injection Locking:
Injection locking can be observed by manually moving one oscillator
frequency closer to the other frequency.
If one oscillator jumps to the other frequency then more isolation may
be needed.
Loop
However, the 3048A won't achieve lock. The 100 MHz PLL's loop bandwidth
(about 0.2 Hz) is too slow for the 3048A to achieve lock.
Does anyone have any ideas?
Since the DUT's loop bandwidth is (presumably) below your minimum offset of
interest, I'd try the Phase noise without PLL
