I would of replied, but I already turned my computer off for the night.

To answer Stork's question, the GPS is not built into the RFTG RB module,
it's built into the RTFG XO module. But the RB is disciplied off the XO/GPS,
so there is still hope.

Note - neither RFG model has/uses a GPS that I have seen. They must just
phase lock off another signal?

I did get a reply from a person who has both units and the chassis. The
chassis is just an open frame with a few connections for splitting signals
and whatnot. His XO unit got hit by lightning though so it is out of action
right now. Anyhow, here's what he said about the pinouts on the RB:

On mine there's an interface cable that might be important to you. Its a dB9
male to male that connects J5 on the Rb to J5 on the XO. I'm guessing that
it brings the GPS receiver info to the Rb module from the XO. Pinout looks
weird. Crisscrossed row by row.
1 - 5
2- 4
3- 3
4- 2
5- 1
6- 9
7- 8
8- 7
9- 6
part number on the cable is 105589-001

The J6 RS422/1pps cable is also dB9 male. It connects up to the divider on
the chassis. It brings a similar cable from the XO unit together in the
divider/combiner and then outputs it as three dB15s. Part number of that
cable is 105590-003.

Jason

I'll try to get the pinout off mine when I get home and post it.

Charles S. Osborne
Technical Director

Pisgah Astronomical Research Institute
1 PARI Drive, HC 73, Box 638
Rosman, NC 28772-9614
http://www.pari.edu
828-862-5813 direct
828-862-5554 main
828-862-5877 FAX
cosborne@pari.edu

----- Original Message -----
From: "Norman J McSweyn" normn3ykf@stny.rr.com
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Friday, December 22, 2006 7:09 PM
Subject: Re: [time-nuts] LUCENT RFTG-m-RB

On Sun, Dec 24, 2006 at 08:40:58PM -0600, Jack Hudler wrote:

Probably, but not certainly, the units advertised can pair with

one of the Rb RFTG-M-RB units recently discussed to provide a
disciplined rubidium with OCXO backup.  Apparently most of what is
required is db-9 to db-9 cables and a couple of SMA to SMA connections.

It appears from some net published photos of the interior of a

similar but possibly later unit (L109) that it is possible that either a
Rb or OCXO could be configured to be GPS disciplined as a single unit
rather than a pair.  It looks like this mostly involves adding a GPS
disciplining mezzanine board and the Moto GPS receiver card.

I should say it appears the hardware can be configured like

this, not so clear as to whether the firmware supports such.

I have ordered a couple of the RFTG-m-XO units to pair with the

RFTG-m-Rb I ordered thinking they included the GPS, and when I finally
get delivery of them I will try to put up a web page with hi res photos
of the inside.

I am, of course, - as at least a couple of others here - quite

interested in documentation....

I am also very much interested in the mechanism used to synthesize

the 15 MHz output.  The L109 photos look like perhaps a DDS chip is
being used for this, and if so I have a strong interest in hacking the
box to produce a precision 64 MHz clock for a gnuradio USRP board...
obviously even the capability to go to 16 MHz instead of 15 would be
very nice...

--
Dave Emery N1PRE,  die@dieconsulting.com  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."

There seems to be very little documentation floating
around for these units.  I bought one of the $130/$185
units (LUCENT RFTG-m-RB) and hope when others start
getting theirs and figuring them out they will post
their findings.

I did email the guy I bought mine from and asked if he
had any documentation, but I heard nothing back.  If I
do find something I will post it, of course.

Jamie

--- "David I. Emery" die@dieconsulting.com wrote:

https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Fedora Core 4 Linux

Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around
http://mail.yahoo.com

Those are the XO units, but they do have the GPS in them, as you can see the
antenna connector (looks like a TNC).

The other person selling all the RBs is also selling the RFTG-M-XO (same as
you linked to) only about 5 popped up recently and I think only 1 is
currently left, for like $180 BIN.

I was thinking about getting one of the XO's, but I'm going to hold out
until I get my RB and see what can be done with it by itself. I'm hopeful
that either the RB can lock onto a PPS via the DB9, or a 10 MHz input. Worst
case it could be removed from the lucent module and used by itself.

Also to reply to someone else in this thread - I've signed up on the Lucent
website but waiting for verification (manual process) before I can do
anything. If I get any documentation I will be sure to let you guys know.

Jason