Why is my rover never changing to 3D/DGNSS/FLOAT or FIXED ?

0 votes
I have  two c94-m8p boards, one as base (displaying fix mode:Time) and the other is rover.
Although i have configured both typically as in the manual, my rover fix mode remian always 3D.
I have read through other posted questions on this issue but i could not solve this problem.
For this is very important for my measurements, please advise?
by efar0026 asked Sep 25, 2017
by efar0026 edited Sep 25, 2017
148 views
0 votes
Have you checked if the Rover is receiving RTCM3 messages?

Have you checked the radio link?

What does UBX-NAV-SVIN report?

Can you provide the configuration from the Base and Rover using Tools->GNSS Configuration-> GNSS > File
by clive1 answered Sep 25, 2017
For the  radio link, both are 9600 baudrate and the green led is fixed while the red is blinking.
Both of the boards were updated to firmware 3.01 HPG 1.40.
Regarding UBX-NAV-SVIN, on the rover it reports not started yet while on the base successfully finished.
The base > GNSS > file, it didn't out put anything.
Rover>GNSS> File reports :
MON-VER - 0A 04 DC 00 45 58 54 20 43 4F 52 45 20 33 2E 30 31 20 28 64 62 30 63 38 39 29 00 00 00 00 00 00 00 00 30 30 30 38 30 30 30 30 00 00 52 4F 4D 20 42 41 53 45 20 32 2E 30 31 20 28 37 35 33 33 31 29 00 00 00 00 00 00 00 00 00 46 57 56 45 52 3D 48 50 47 20 31 2E 34 30 52 4F 56 00 00 00 00 00 00 00 00 00 00 00 00 00 50 52 4F 54 56 45 52 3D 32 30 2E 33 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 46 49 53 3D 30 78 45 46 34 30 31 35 20 28 32 30 30 30 33 30 29 00 00 00 00 00 00 00 00 00 47 50 53 3B 47 4C 4F 3B 42 44 53 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 5A 53 53 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CFG-ANT - 06 13 04 00 1B 00 F0 B9
CFG-DAT - 06 06 02 00 00 00
CFG-DGNSS - 06 70 04 00 03 00 00 00
CFG-GNSS - 06 3E 24 00 00 1C 1C 04 00 08 10 00 01 00 01 01 03 08 10 00 00 00 01 01 05 00 03 00 01 00 01 01 06 08 0E 00 01 00 01 01
CFG-INF - 06 02 0A 00 00 00 00 00 00 00 00 00 00 00
CFG-INF - 06 02 0A 00 01 00 00 00 07 07 00 07 07 00
CFG-ITFM - 06 39 08 00 F3 AC 62 2D 1E 03 00 00
CFG-LOGFILTER - 06 47 0C 00 01 00 00 00 00 00 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0B 30 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0B 31 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0B 01 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 21 08 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 0B 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 09 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 02 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 06 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 07 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 21 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0A 08 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 22 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 04 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 61 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 39 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 13 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 14 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 09 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 34 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 01 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 02 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 07 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 3C 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 35 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 06 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 03 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 01 30 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 01 3B 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 24 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 23 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 20 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 26 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 21 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 11 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 01 12 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 02 14 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 02 15 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 02 32 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 02 13 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 02 20 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0D 03 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0D 01 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 0D 06 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F0 00 01 01 00 01 01 00
CFG-MSG - 06 01 08 00 F0 01 01 01 00 01 01 00
CFG-MSG - 06 01 08 00 F0 02 01 01 00 01 01 00
CFG-MSG - 06 01 08 00 F0 03 01 01 00 01 01 00
CFG-MSG - 06 01 08 00 F0 04 01 01 00 01 01 00
CFG-MSG - 06 01 08 00 F0 05 01 01 00 01 01 00
CFG-MSG - 06 01 08 00 F0 06 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 F0 07 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 F0 08 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 F0 09 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 F0 0A 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F0 0D 00 00 00 01 00 00
CFG-MSG - 06 01 08 00 F0 0F 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F1 00 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F1 03 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F1 04 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 05 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 4A 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 4D 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 54 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 57 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 7C 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 7F 00 00 00 00 00 00
CFG-MSG - 06 01 08 00 F5 E6 00 00 00 00 00 00
CFG-NAV5 - 06 24 24 00 FF FF 00 03 00 00 00 00 10 27 00 00 0A 00 FA 00 FA 00 64 00 5E 01 00 3C 00 00 00 00 00 00 00 00 00 00 00 00
CFG-NAVX5 - 06 23 28 00 02 00 FF FF 3F 03 00 00 03 01 03 14 06 00 00 01 00 00 4B 07 00 01 00 00 01 01 01 00 00 64 00 00 00 01 12 00 00 00 00 00
CFG-NMEA - 06 17 14 00 00 40 00 02 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00
CFG-ODO - 06 1E 14 00 00 00 00 00 00 00 00 00 19 46 19 66 0A 32 00 00 99 4C 00 00
CFG-PRT - 06 00 14 00 00 00 00 00 84 00 00 00 00 00 00 00 23 00 23 00 00 00 00 00
CFG-PRT - 06 00 14 00 01 00 00 00 C0 08 00 00 80 25 00 00 20 00 00 00 00 00 00 00
CFG-PRT - 06 00 14 00 03 00 00 00 00 00 00 00 00 00 00 00 03 00 03 00 00 00 00 00
CFG-PRT - 06 00 14 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CFG-RATE - 06 08 06 00 E8 03 01 00 01 00
CFG-RINV - 06 34 18 00 00 4E 6F 74 69 63 65 3A 20 6E 6F 20 64 61 74 61 20 73 61 76 65 64 21 00
CFG-RXM - 06 11 02 00 48 00
CFG-TP5 - 06 31 20 00 00 01 00 00 32 00 00 00 40 42 0F 00 40 42 0F 00 00 00 00 00 A0 86 01 00 00 00 00 00 77 00 00 00
CFG-TP5 - 06 31 20 00 01 01 00 00 32 00 00 00 04 00 00 00 01 00 00 00 48 E8 01 00 A0 86 01 00 00 00 00 00 7E 00 00 00
CFG-USB - 06 1B 6C 00 46 15 A8 01 00 00 00 00 64 00 02 00 75 2D 62 6C 6F 78 20 41 47 20 2D 20 77 77 77 2E 75 2D 62 6C 6F 78 2E 63 6F 6D 00 00 00 00 00 00 75 2D 62 6C 6F 78 20 47 4E 53 53 20 72 65 63 65 69 76 65 72 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Using a suitable terminal app, connect to the RS232 port of the Rover, and confirm if you can see RTCM3 packets arriving, should see 0xD3,0x00 type header when in Hex mode.

Check reception by looking at UBX-RXM-RTCM
Make sure UBX in/out supported on Base, and try to get configuration data out. If base doesn't output the RTCM3 packets, the rover has no opportunity to enter float/fixed modes.
So, in this case, is there any possible solution  for this fault ?
You have to figure out why the Rover isn't getting the data it need from the Base. Perhaps you can discuss with local distributor or sales office?
Hi Clive, many thanks to you for the support and help !
Clive, one more thing. I took the rover and the base for testing on the same roof and it worked while on the ground (open space) both (base and rover) red led stopped blinking and of course RCTM data is not being received on the rover. Can you please explain why UHF antennas work on the roof ?