[App_rpt-users] Trouble with RTCM and Garmin GPS (18x LVC)

[Lee Woldanski]

Have you looked at:

http://wiki.allstarlink.org/wiki/RTCM_Client#GPS

Specifically, does this Garmin use 5V or 3.3V logic?

I believe the RTCM uses 5V logic only (the VOTER) will do either.

If your Garmin is 3.3V, it may have issues.

Also, make sure the baud rate is correct, and it is configured to send the
required NMEA sentences.


Lee

On Nov 16, 2017 12:40 AM, "Doug Kingston" <dpk at randomnotes.org> wrote:

I can't get the RTCM to recognize the attached GPS unit.
Reference: http://static.garmincdn.com/pumac/GPS_18x_Tech_Specs.pdf

I have determined that pin6 on the DB15 of the RTCM is transmit data to the
GPS (using an oscilloscope) and that's hooked to the RxData line of the
Garmin (green).  Will the Garmin respond if it does not have lock?

RTCM diagnostics complain:
Running Diagnostics...

Warning!! VF Diode NOT calibrated!!!

Testing PTT/External CTCSS
Error - Failed to read PTT/CTCSS in asserted state
Testing GPS UART
Error - Failed to read data from GPS UART

Any hints? or ways to get more diagnostics?

-Doug-

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