[time-nuts] 35601A as stand-in for 11848A ?

John Miles jmiles at pop.net
Fri Jan 4 22:33:49 EST 2008

I have a 35601A, although I've never done anything with it.  It seems to be
very much hardwired to work in a 3047A system, with the particular analyzer
model(s) and software controller that entails.  The 11848A is nicer but
still designed to work within a very specific system configuration.

My current thinking is that most people are better off with an 11729B/C, or
possibly just a homebrew quadrature-PLL implementation if they don't care
about microwave downconversion.  The 11729B/C plus an 8662A (or even an
8640B) has everything most people will ever need for PN measurement.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of BriMDavis at aol.com
> Sent: Friday, January 04, 2008 7:28 PM
> To: time-nuts at febo.com
> Subject: [time-nuts] 35601A as stand-in for 11848A ?
> Has anyone ever looked into the feasibility
> of using a 35601a as a stand-in for the 11848a
> in a 3048a phase noise system?
> I've been attempting to piece together a 3048a for
> low budget 'home project' use to do some two source
> quadrature lock measurements.
> The 35601a's are much cheaper as surplus, and at the
> block diagram level appear similar, but without the
> extra internal sources on the oscillator deck.
> I presently have the service manual for the 11848a,
> but not yet the 35601a, to see whether it has all the
> necessary signal paths for the 3048a calibration and
> quadrature lock process.
> If similar enough, I was considering an attempt
> at hacking up the 35601a HPIB interface to make it
> appear to be an 11848a ( hoping that the evolutionary
> path from 3047a -> 3048a left the two quite similar ).
> Brian

More information about the time-nuts mailing list