[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

Bob Stewart bob at evoria.net
Mon Oct 20 14:11:13 EDT 2014

Stu said:

"Power is applied to the connector labeled "+24VDC" and "P1", in exactly the same way as the earlier RFTG units. Apply +24V to pin 1 and the other side of the power supply (GND or RTN) to pin 2.  In these units, that power supply goes directly to an isolated Lucent DC/DC converter brick labeled "IN: DC 18-36, 1.9A".  Presumably you can run both units with a 4-amp supply."

Hi Stu,

I decided to get a set of these as a reference for my own GPSDO development efforts.  Now to power it.  From your description, it looks like a pair of laptop supply bricks might fit the bill.  I'm looking at one here that says DC 22.5-18V 2.0-2.5A.  Does that sound reasonable or should I get something a bit better?


 From: Stewart Cobb <stewart.cobb at gmail.com>
To: time-nuts at febo.com 
Sent: Sunday, October 19, 2014 11:53 PM
Subject: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A,	Z3812A GPSDO system

Fellow time-nuts,

This (long) post is a review of the HP/Symmetricom Z3810A (or Z3810AS)
GPSDO system built for Lucent circa 2000.  I wrote it because I looked
for more information before I bought one, and couldn't find much.
It's relevant because (as of this writing), you can buy a full system
on the usual auction site for about $150 plus shipping.  For those of
you lamenting the dearth of cheap Thunderbolts, this looks like one of
the best deals going.  The description of these objects does not
include "GPSDO", so time-nuts may have missed it.  Search for one of
the part numbers in the subject line and you should find it.

<big snip>

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