RTK BASE Portable status screens
Below sets out the format of the status screens for the RTK BASE Portable. In normal operation the unit cycles over the screens continuously.
||Unit serial number
|Firmware and hardware version
||Current CPU load
Note that the CPU load should be under 75% in normal operation. If above 75% then consider the configuration.
|LTE status, or if available the operator’s name
|Data rate from server to unit
||Data rate from unit to server
The signal strength is derived from the total turnaround time for communications with the server. That is the time to send a message to the server and get a response. Under optimal conditions, the total turnaround time is approximately 0.2 seconds.
The maximum data rate with the server is about 1Mbit.
Satellite status screens
|Satellite constellation name
||Freq 1: satellite count
||Freq 2: satellite count
The constellation names are GPS, GAL(ileo), GLO(nass), BEI(dou)
Long/lat (only displayed for basestation products)
This screen displays the currently surveyed longitude and latitude and is displayed in degrees.
|GPS update rate
||Current positional accuracy
|Number of satellites in use
||RTCM correction status
Note that GPS is displayed for simplicity, however this is for all satellite constellations, including GPS, Glonass, Galileo and Beidou
Base station survey status
Once the unit is powered up, the GPS is initialised, its in this mode for 2 minutes.
If the unit has been set to run in relative positioning mode (not absolute position mode), then after GPS initialisation is complete it will change to relative base station mode and this screen is displayed.
If the unit has been set to run in absolute position mode, and no surveyed location is available then the units will start to then after GPS initialisation is complete it will change to relative base station mode and this screen is displayed.
||Configured baud rate, if E is displayed then errors are detected
|Data rate received by the unit
||Data rate transmitted from the unit
||This is the total data to the modem port on the rear of the unit, this runs at a fixed 115k
||USB port has no baud rate is not shown
||This shows the total data communication with the internal GPS receiver, useful for diagnosing issues
||This is the number of valid RTCM bytes transferred over the LTE/4G connection
||This is the number of valid RTCM bytes transferred to the internal GPS receiver
||This is the number of valid RTCM bytes transferred over the modem port
Note that this is only display if there is either some data being received or transmitted on the relevant ports.
If the E is displayed after the baud rate, then there are errors detected. Typically this is due to one of the following:
- incorrect baud rate
- an intermittent wiring or connector fault
- interference, possibly from the vehicle ignition, consider rerouting/shortening cables.