Dave,
The seller is offering the REF-0 and REF-1 units at $75 each plus
shipping. When I searched for "Lucent KS-24361", I found the
original item with both, as well as the individual units.
--Glen Hoag
[email protected]
At 10:22 AM 10/20/2014, you wrote:
Stu,
Many thanks for the heads-up on htese units. Great deals.
Can you advise the size of these units? Are they full-size 19" rack
mount or the half-size units like the Z3801A?
Can the REF-1 unit (the one with the GPS receiver) be operated
separately from the REF-0 unit?
There is a mod on Didier's site to add the 10 MHz output to the
RFTGm unit at
http://www.ko4bb.com/manuals/download.php?file=05)_GPS_Timing/Lucent_RFTGm_RFTGm-II-XO_GPSDO_modification_to_add_10MHz.pdf.
I don't know if the mod will apply to the units on Ebay right now,
but it's quite possible that it does.
Cheers,
Dave M
Stewart Cobb wrote:
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.
So what is it? It's a dual GPSDO built by HP as a reference
(Redundant Frequency and Time Generator, or RFTG) for a Lucent
cell-phone base station, built to Lucent's spec KS-24361. Internally,
it's a close cousin of a later-model Z3805A. Externally, it looks to
be almost a drop-in replacement for the earlier RFTG system built to
Lucent's spec KS-24019. That was a redundant system containing one
rubidium (LPRO, in the one I have) and one OCXO in two
almost-identical boxes. That spec went through several revisions with
slightly different nameplates and presumably slightly different
internals. You can generally find one or two examples on the auction
site (search for RFTG or KS-24019).
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