Ublox C94-M8P User manual

locate, communicate, accelerate
C94-M8P Application Board
Setup Guide
UBX-16009722 –R02

C94-M8P Board Connections and Interfaces
•J1: RS232 –UART M8P/Radio
•J2: USB –M8P
•J3: External battery / DC
connector
•J6: Debugger interface for radio
module
•J8: UART & GNSS features
•Geofence and RTK status
•Interface to e.g. u-blox C027
•J9: Indicator LEDs
© u-blox AG
Slide 2
J6
J10
J3
J1
J2
J8

Setting up the C94-M8P
Two C94-M8P boards –the “Base” and the “Rover” – need to be set up:
1. Connect the UHF whip antenna to the SMA connector “UHF”
2. Connect the GNSS patch antenna to the SMA connector ”GNSS”
3. Connect the USB port on the board to a PC (for power and configuration)
© u-blox AG
Slide 3

Preparing to Configure the C94-M8P
To configure your C94-M8P kit you need to first:
•Download the latest u-center from
https://www.u-blox.com/en/product/u-center-windows
© u-blox AG
Slide 4

Updating firmware on C94-M8P
•All the changes in configuration are lost when application boards are
updated. The Base and Rover must be re-configured after updating.
•Do not have more than one application board connected to your computer
while updating.
© u-blox AG
Slide 5
Before starting the evaluation, check that the application boards are using the latest
firmware (currently HPG 1.40). Information on the latest firmware is published on the
u-blox web site. To update the firmware, follow the steps described in the u-center
User Guide, chapter 8.1, Firmware update.
See https://www.u-blox.com/en/product/u-center-windows.

Configuring the Base Station
There are three steps to configure the Base Station:
1. Set the position, by having the Base Station do one of the following:
a) survey-in its coordinates
b) be configured with pre-surveyed coordinates
2. Set-up the port for the Radio Link for Port configuration
3. Select RTCM messages for transmission
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Slide 6
The two boards are identical. Select one board to act as a “Base Station”.
The next slides will guide you through the steps needed to configure the Base Station

Step 1 –The Base Station Coordinates
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Slide 7
Use UBX-CFG-TMODE3 to:
•Begin a self survey
•Use, for example, 5 minutes
and 2 meters as targets.
•With a good antenna in a
friendly multipath
environment you can reach
1 meter with a 10-15 min
observation time.
•Or, provide a fixed position
estimate

Step 1 –The Base Station Coordinates
© u-blox AG
Slide 8
•The UBX-NAV-SVIN message allows you
to monitor the survey-in process.
•Self survey finishes when the accuracy
AND time limit are satisfied.
An operating Base
Station indicates its
Fix Mode as “TIME”.
Note that you might
have to disable NMEA
messages to see this
mode correctly.

Step 2 –Base Station Radio Link
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Slide 9
•Use UBX-CFG-PRT to specify that only RTCM3 data is output on UART1.

Step 3 –Selecting RTCM messages
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Slide 10
For a GPS/BeiDou setup or moving baseline applications, refer to the User Guide (UBX-15031066).
•Use UBX-CFG-MSG to specify that these three RTCM3 messages are
output on UART1.
•1005 (Station coordinates)
•1077 (GPS observations), and
•1087 (GLONASS observations)
•1230 (GLONASS code-phase biases)