It's been a while since I looked at the uGPS and how it was powered, but yes, that's the general gist. I can't confirm the exact voltage or how the power appeared on the pins since it has been so long since I looked.
I also can't remember the exact reason why I chose not to go down the path of building a syncpipe which could be powered off of a uGPS port, other than I have a vague recollection of the power supply circuitry being the reason - probably because the 5v is significantly lower than the 8-9V that a syncpipe will power on at. Due to the PTP450 issue I am looking at some additional sync over timing port options. Gigabit throws a wrench into a lot of the parasitically powered options, though. On Mon, Nov 24, 2014 at 1:06 PM, Matt via Af <af@afmug.com> wrote: > So when you enable UGPS Power in options what does it do? Is 5 volt > suddenly output on certain pins of the timing port? What pins? > > > Nope. But you can use Forrest's SyncConverter to take the sync pulse > from a > > CMM/CTM/SyncInjector and convert it to timing port at the radio. Or just > put > > a Parasitic 'pipe on it. > > > > I asked Forrest about doing a SyncPipe that takes UGPS power. He said no. > > Maybe the cost of the serial power circuit, I don't know. > > > > > > On 11/24/2014 10:16 AM, Matt via Af wrote: > >> > >> I see the PTP230 and likely PTP450 have UGPS Power option. Is there a > >> way to use this to power up a sync pipe? Still very very very > >> disappointed the PTP450 does not support Sync over Power. >
