[time-nuts] Motorola VP docs
Robert E. Martinson
REMartinson at rcn.com
Fri Feb 23 01:51:37 EST 2007
Thank you very much for your kind offer of help. I haven't been trying to
ignore it, but have been a bit tied up lately.
Briefly I bought a pair of Lucent RFTG-m-XO & RB units on Ebay. The XO unit
uses a Motorola VP GPS receiver. My receiver seemed to work fine when
installed in a "dumb" test board (the TAC-2 from TAPR), but was a disaster
when plugged into the XO unit. I was unable to exactly repeat the problems,
making trouble shooting difficult. Also NO info is available on the RFTG
units as far as us Time-Nuts know. I believe the GPS receiver is OK & the
problem resides in the XO units hardware or firmware. The XO unit would
often report NO GPS, while I could plainly see it was tracking numerous
satellites OK using TAC32 connected to the receivers data output port. It
would also go into fault occasionally.
Anyhow I bought another XO unit and received it yesterday. It is working
fine!!! I may go back & try & isolate the problem in the old XO unit. I'm
a little nervous about swapping boards between the 2 units, don't want to
mess up the good ones ($180 on Ebay).
Thanks again for your offer of help!!
Bob Martinson, N1VQR
A retired EE from GTE, worked in international satellite communications for
36 years, almost entirely overseas.
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Geodetics
Sent: Thursday, February 15, 2007 1:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Motorola VP docs
I'm afraid not. I'm no longer with Synergy and I don't think they will ever
do it. You should email: oemtech at synergy-gps.com and request the VP Command
Reference in case you don't have it. If you can explain your problems I
might still be able to help.
----- Original Message -----
From: "Robert E. Martinson" <REMartinson at rcn.com>
To: "'Discussion of precise time and frequency measurement'"
<time-nuts at febo.com>
Sent: Thursday, February 15, 2007 9:33 AM
Subject: Re: [time-nuts] Motorola Oncore PVT documenation
> Hi Randy,
> Did this PV data get uploaded? Could you please steer me to it? I'm
> some problems with the Lucent RFTG units which use the Oncore VP receiver.
> Bob Martinson, N1VQR
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Randy Warner
> Sent: Monday, July 24, 2006 11:23 AM
> To: bg at lysator.liu.se; Discussion of precise time and frequency
> Subject: Re: [time-nuts] Motorola Oncore PVT documenation
> I am in the process of uploading the VP stuff to the website.
> time-nuts mailing list
> time-nuts at febo.com
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