CFGNAV: Configure Positioning Frequency
Applicable to: UC6580, UM620 series1, UM621 series, UM670A, UM680A, UM681A
Read Positioning Frequency Configuration
| Syntax | $CFGNAV |
|---|---|
| Example | $CFGNAV |
| Description | Read the positioning frequency configuration. The receiver outputs CFGNAV message after receiving this command. |
| Input/Output | Input |
| No parameters |
1. Not supported by UM620S. ↩
Set/Output Positioning Frequency Configuration
| Syntax | $CFGNAV,MeasRate,NavRate,DRNavRate | |
|---|---|---|
| Example | $CFGNAV,1000,1000,100 | |
| Description | Set or output positioning frequency configuration | |
| Input/Output | Input/output | |
| Parameter Definition | ||
| Parameter | Format | Description |
| MeasRate | UINT | Observation interval; unit: ms; 1000 - corresponding to 1 Hz observation frequency 200 - corresponding to 5 Hz observation frequency 100 - corresponding to 10 Hz observation frequency |
| NavRate | UINT | GNSS positioning interval; unit: ms; 1000 - corresponding to 1 Hz GNSS positioning frequency 200 - corresponding to 5 Hz GNSS positioning frequency 100 - corresponding to 10 Hz GNSS positioning frequency |
| DRNavRate | UINT | INS positioning interval; unit: ms; 100 - corresponding to 10 Hz INS positioning frequency 50 - corresponding to 20 Hz INS positioning frequency 20 - corresponding to 50 Hz INS positioning frequency Except for the integrated products, the parameter is invalid for other modules which return 0 when making an inquiry. |
MeasRate and NavRate should be the same, otherwise, the message would return FAIL.
When the GNSS positioning frequency is 10 Hz, CFGINS cannot be configured to 2 - Vehicle-mounted mode to enable the second NMEA output.
After the configuration of NavRate is finished, GSV and the RTCM Ephemeris will be reset to output at 1 Hz, and the Ionosphere Information and TGD/ISC Information in extended RTCM messages will output once every 30 s.
After the configuration of DRNavRate is finished, SNRSTAT will output at 1 Hz.