[time-nuts] Synergy-GPS SSR-6tru problems
bob at evoria.net
Tue Jul 15 17:36:58 EDT 2014
I got one of these recently, along with the adapter board. This is the ublox only version, and I am using u-center version 8.11 software. I am unable to make it work properly. The NMEA section happily sends out messages, but I cannot get anything else to work. e.g. it ignores the commands to turn off antenna power. It ignores the command to put it in Survey-In mode. Nothing is displayed when monitoring the SVIN field. I sent the board back and received one that they have tested there at the site. Same story. When I plug my UT+ into the same connector in my GSPDO, it works just fine and responds properly to commands from WinOncore12. I have used both a serial port adapter and a USB-adapter to drive the TTL lines to the board.
So, there is something wrong at my end, and it's probably something so trivial that no-one would think to mention it. Has anyone tried this board? Can you think of any setting that's "inherently obvious to the most casual observer" that a newbie could repeatedly overlook? For example, is there some first setting that you always do in u-center to shut down the NMEA and turn on the UBX, but the setting does not save on the board and the u-center software always overrides it?
The configuration is this: The adapter does the 3V to 5V stuff, and plugs into the same connector as my UT+. The antenna lead is connected to a non-powered port on my GPS Source splitter. The splitter connects to a puck in the attic via RG-6. The SNR of the received signals is in the 20-50 range on the u-center display window. I have tried driving a different puck directly that is in my lab room. No change except for lower SNR values.
Bob - AE6RV
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