I've had problems with the VHF transmitter antennas being too close to the GPS antenna and RF swamping it. If you go to site and use the Trimble software to see satellite signal data then key the transmitter, mine would show a loss of almost all the satellites.  

Cheers,

Jesse

On Jul 10, 2017, at 1:17 PM, Tim Sawyer <tisawyer@gmail.com> wrote:

My RTCM, two of then actually on the same Trimble, are loosing lock of late. The output from the RTCM Debug mode 40 is shown below. I read that all zeros was good but I'm wondering 08 and 04 in the last byte mean. Does any know how to decode this?

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 08

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 08

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 08

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 08

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 08

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 08

GPS-DEBUG: TSIP: ok 0, 9 - 14: 00 00 00 00 00 04

07/10/2017 20:08:22.160  GPS signal lost entirely. Starting again...

07/10/2017 20:08:22.160  Host Connection Lost (Pri) (192.168.1.6)

GPS-DEBUG: TSIP: ok 0, 9 - 14: 00 00 00 00 00 04

GPS Receiver Active, waiting for aquisition

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 00

GPS signal acquired

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 00

07/10/2017 20:08:26.160  Time now syncronized to GPS

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 00

07/10/2017 20:08:26.500  Host Connection established (Pri) (192.168.1.6)

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 00

GPS-DEBUG: TSIP: ok 1, 9 - 14: 00 00 00 00 00 00

--

--

Tim

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