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

[Bob Stewart]

As a reminder, I received an SSR-6tru receiver from Synergy, along with their M12 adapter, which allows you to plug it into a slot for an Oncore GT+, UT+, or VP.  I was unable to get the receiver to respond to any commands from the u-blox u-center software.

After a lot of troubleshooting, I discovered that pin-5, the "DGPS IN" pin, must be brought to a logic level high in order for this assembly to work.  If it's low, apparently anything going into the board on the Rx line is simply sent back out on the Tx line and not passed to the receiver.  I've never owned a GT+ or a VP, so I wasn't aware that a logic high was needed on this pin.  The UT+ works just fine with this pin not connected.

Bob