I don't think it would be a bad idea to have a SyncPipe type device
powered by UGPS capable radios. Less cabling is a benefit. If
sync-over-power takes a shit on an AP, it would be easy to toss a
UGPS-like receiver on it. Etc. I think if it was the cost of a Basic
pipe, that would be fine.
And the PTP450 being SM hardware based, there's no GigE to worry about.
It really sounds like Cambium needs to do a separate hardware spin for
the PTP450 like they did for the 230 and add sync-over-power.
On 11/24/2014 6:58 PM, Forrest Christian (List Account) via Af wrote:
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 <[email protected]
<mailto:[email protected]>> 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.
