[time-nuts] Synergy-GPS SSR-6tru Problem Resolved

Mike Feher mfeher at eozinc.com
Sat Jul 26 02:09:14 EDT 2014

I knew Ulrich and talked to him a few times on 2 meters. Met him at a
conference also. I was under the impression that his wife was the one
running Synergy. 73 - Mike 

Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-902-3831 cell

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Alexander Pummer
Sent: Friday, July 25, 2014 8:52 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved

Synergy's owner Ulrich Rohde N1UL --DJ2LR/DL1R is a long time ham radio
operator, and he will go pretty far to help for an other ham,
KJ6UHN ex DL...

On 7/25/2014 5:27 PM, Bob Stewart wrote:
> And while this subject is still up, I want to let the group know that
Synergy *really* went out of their way to help me with this.  I was a bit
surprised at their level of commitment to some ham radio operator who had
bought a single unit from them and probably didn't know what the heck he was
talking about.  A real class act all around!
> Bob - AE6RV
> ________________________________
>   From: Art Sepin <art at synergy-gps.com>
> To: Bob Stewart <bob at evoria.net>; Discussion of precise time and 
> frequency measurement <time-nuts at febo.com>
> Cc: Tom Van Baak <tvb at leapsecond.com>; Dusty Morris 
> <doxielover57 at cox.net>
> Sent: Friday, July 25, 2014 5:17 PM
> Subject: RE: [time-nuts] Synergy-GPS SSR-6tru Problem Resolved
> Bob,
> Once in a while a mea culpa is required and we're posting it here so
everyone understands our commitment to the users of Synergy's products.
> The Original Synergy Adaptor Board was designed to allow Motorola's newer
3 volt 12 channel M12+ to plug into an older 5 volt 8 channel UT+ slot. That
product worked for hundreds of users over the years until (we found out
through your personal aggravation and agony) the recent introduction of
Synergy's SSR series of u-Blox based precision timing boards.
> To make sure that the Synergy UT+ Adaptor Board issue is put to bed
properly we asked for an external, formal technical review of this product
that was introduced fourteen years ago.
> The reviewing engineer's first comments were "Ouch! This will not work."
And, "no, the SSR boards do not work the same as the M12 boards on the
Synergy Adaptor Board". "The M12+ and M12M receivers have separate serial
ports for the two functions (Receiver command RxD and DGPS RxD input) so it
does not matter what you do with the RTCM port, pin 5 on UT+ connector and
pin 8 on the M12+/M12M connector, if not in use with an M12x receiver."
> "The SSR boards, however, had to combine the two serial data streams
expected by the M12x navigation receivers into one because the u-Blox
receiver modules only use one serial input port for both receiver commands
and DGPS correction data. The Synergy Adaptor Boards use a simple gate
combiner circuit that worked well when using the M12+ or M12M but left
Synergy open to this problem when using an SSR. Both serial lines on the SSR
board, pins 2 (Receiver RxD) and 8 (DGPS RxD) are pulled high on the SSR
board so open pins are OK but they must not be grounded."
> "The solution is for Synergy to make a UT+ Adaptor Board part number
available to users who only want to test the features of SSR timing
> That new SSR only Adaptor Board part number, which we'll have available in
a few days, will remove R3 (4.7K) and R4 (6.8K) from the adapter board and
the compatibility issue will be resolved. In the interim, other users can
pull pin 5 of the UT+ connector high (+5V) as you did.
> We apologize for the confusion and frustration, Bob, and thank you for the
valuable feedback!
> Art Sepin
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