[time-nuts] [Bulk] Re: Ultra High Stability Time Base Options for 53132A

J. L. Trantham jltran at att.net
Mon Apr 13 08:03:55 EDT 2015

Fuzzy page 13 is the 53132-60011, with the extra components not found on the 53132-60016, which is on page 45 and much clearer.  It is an LM361M and is on both boards. 

Now that I have the 53132-60011 board, I plan to start with page 45 and 're-draw' a clear page 13.


-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Richard (Rick) Karlquist
Sent: Sunday, April 12, 2015 6:49 PM
To: Discussion of precise time and frequency measurement
Cc: magnus at rubidium.se
Subject: [Bulk] Re: [time-nuts] Ultra High Stability Time Base Options for 53132A

The resolution of page 13 is poor, and it seems to be a bitmap instead of a vector file.  The fuzzy thing in the lower right corner looks like it might be a comparator.  I think this was the smoking gun.

There was a saying by H.L. Menken to the effect that for every complex problem, there is a simple, obvious, invalid solution.

Squaring up a 10811 with a comparator is a perfect example of this principle.  Non-time-nuts always seem to gravitate to this design.

Of course you're right, any comparator will add jitter to a 10811.
The faster they are, the more jitter they add.

I noticed that the standard 10 MHz oscillator is built with an ECL line receiver.  Another example of Menken's saying.
This is a TERRIBLE oscillator design, but one that would appeal to the non-initiated.  I built one of these oscillators in 1976 at the suggestion of my boss.  After seeing how bad it was, I quietly designed it out and never used it again.

Rick Karlquist N6RK
time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

More information about the time-nuts mailing list