[time-nuts] LUCENT RFTG-m-RB

[James R. Gorr]

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 at dieconsulting.com> wrote:

> On Sun, Dec 24, 2006 at 08:40:58PM -0600, Jack
> Hudler wrote:
> > Unit says RFTG-m-XO   XO = xtal and RB = rubidium
> 
> 	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 at 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."
> 
> 
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Fedora Core 4 Linux

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