Thought this might be interesting. I took a spectrum analyzer shot of
my ICS525 Clock-Block synthesizer at 250MHz, and overlaid it with a
shot of an RF signal generator (Marconi 2202A) at the same frequency,
and using the same reference source.
The 2202A is designed for bench use and isn't noted
Being very lazy, I wonder if anyone has a bit of Javascript lying around
that converts the current time to MJD and displays it? I thought it
would be cool to put that on some of my plot pages so you can readily
figure out the age of the data.
John
___
In message [EMAIL PROTECTED], John Ackermann N8UR writes:
Thought this might be interesting. I took a spectrum analyzer shot of
my ICS525 Clock-Block synthesizer at 250MHz, and overlaid it with a
shot of an RF signal generator (Marconi 2202A) at the same frequency,
and using the same reference
Being very lazy, I wonder if anyone has a bit of Javascript lying around
that converts the current time to MJD and displays it? I thought it
would be cool to put that on some of my plot pages so you can readily
figure out the age of the data.
John
See:
You can steal some routines here:
http://www.merlyn.demon.co.uk/astron-3.htm
- Original Message -
From: John Ackermann N8UR [EMAIL PROTECTED]
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, August 20, 2006 12:22 PM
Subject: [time-nuts] MJD
Hi John:
It's my understanding that the lowest jitter comes about when the
highest output divisor is used.
In case of ties use the lowest VCO divisor. See:
http://www.pacificsites.com/~brooke/BTSG.shtml
Have Fun,
Brooke Clarke
--
w/Java http://www.PRC68.com
w/o Java
Lots of goodies on that page; thanks! (And thanks to tvb, too, for the
link to his converter).
John
Joseph Gray said the following on 08/20/2006 03:23 PM:
You can steal some routines here:
http://www.merlyn.demon.co.uk/astron-3.htm
- Original Message -
From: John Ackermann
Also, just for time-nuts, check out these calendars:
Display wall calendar with GPS and MJD:
http://www.leapsecond.com/java/cal.htm
Display wall calendar with GPS week numbers:
http://www.leapsecond.com/java/gpscal.htm
Display wall calendar with MJD:
http://www.leapsecond.com/java/mjdcal.htm
A handy passive frequency doubler can be made just using a
double-balanced mixer. Feed 5 MHz into the X and R ports
connected together and take 10 MHz out of the L port. You'll
loose a few db and the waveform becomes rather triangular but
if your goal is to sync the internal oscillator
The Tracor 704 is a phase angle meter with two ranges -
36 and 360 degrees. The meter is analog, not digital. It
has three inputs - Ref, A, and B. Seems like a phase angle
meter should only have two inputs, but the function switch
has 5 positions - Ref, A, B, A-B and B-A.
My question is, what is
10 matches
Mail list logo
