ap450i not syncing with UGPS

Products PMP
1

we replace two AP450 with two AP450i and installed one UGPS between them, connected with the sync port in the two AP. the UGPS is powered by the sync port, no autonomous power supply.

we have used a sync cable with the pin out diagram indicated here (http://community.cambiumnetworks.com/t5/PMP-FAQ/Cable-Diagram-for-450i-to-UGPS/td-p/52198)

AP450i talks with the UGPS but they do not succeed to sync:

Sync Status

Sync Pulse Source :
Searching
Sync Pulse Status :
Generating Sync - Free Run
Sync Pulse Status - Timing Port/UGPS :
No Sync
Sync Pulse Status - Power Port :
No Sync
UGPS Power Status :
Power On
Satellites Visible :
17
Satellites Tracked :
7
GPS Date :
00/00/2080
GPS Time :
16:48:31
Tracking Mode :
3D Fix
Latitude :
'the right one'
Longitude :
'the right one'
Height :
'the right one'
Invalid Message Count :
10385

GPS Receiver

GPS Receiver Information :
Canopy UGPS (GPS + GLONASS)
Function: 3
Software Version: AXN_3.20
Software Revision: 8175
Software Date: 007-21-2014
Model: GNSS_EXTRF_9600

noticing the invalid message count, we have tried different cable, but with no differences.

we also tried another UGPS unit, no difference.

ap 450i, ver 14.1.2

any idea?

many thanks!!

2

after almost 24h...

Sync Status

Sync Pulse Source :
Searching
Sync Pulse Status :
Generating Sync - Free Run
Sync Pulse Status - Timing Port/UGPS :
No Sync
Sync Pulse Status - Power Port :
No Sync
UGPS Power Status :
Power On
Satellites Visible :
12
Satellites Tracked :
10
GPS Date :
10/27/2016
GPS Time :
14:37:05
Tracking Mode :
3D Fix
Latitude :
'the right one'
Longitude :
'the right one'
Height :
'the right one'
Invalid Message Count :
14418
3

ok, problem solved, even if i didn't understand what it was, but may be it can be helpful for someone.

in exact order we have done the following test after rechecking we have error in both ap.

detached second ap,

detached first ap, now UGPS is switched off,

reconnected first ap in the first port of UGPS and verifyied no error and sync functional,

reconnected first ap in the second port of UGPS and verifyied no error and sync functional,

reconnected second ap in the first port of UGPS and verifyied no error and sync functional,

reconnected second ap in the second port of UGPS and verifyied no error and sync functional,

reconnected both ap and verifyied no error and sync functional!

now it's a week it's working.

4

I would also only use the necessary lines in your sync cable.  This was key with the PMP320s, as they had a nasty habit of seeing sync cables as default plugs if you had all the lines connected, but I think it's a good practice in general.

1 Like
5

Hello BlackTC,

I have same issue, did you connected both ap sync cable at the same time? rebooted?

6

As noted in your other thread on this topic, I think adding the AC Power Supply to the center port on your UGPS will eliminate this issue.