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A Trimble Standard Interface Protocol
60 Trimble ThunderBolt E GPS Disciplined Clock User Guide
Command Packet 0x70: Filter Configuration
This packet provides control for the available filters. The PV filter smoothes position
data when the antenna is moving and attempts to reduce the effects of position
disturbances, which include reflected signals and small outages of DGPS corrections.
Command Packet 0x70 enables or disables the P/V Filter, Static Filter, Altitude Filter,
Kalman filter. Filter selection is restricted by the following:
• The PV filter must be turned on before the Static Filter can operate.
• The Kalman filter takes precedence, i.e., enabling the Kalman filter will disable
the PV, Static, and Altitude filters
To request the filter operation state, send Command Packet 0x70 with no data bytes.
Report Packet 0x70: Filter Configuration
This packet reports the current configuration for the available filters.
9-12 VDOP Single VDOP
13-16 TDOP Single TDOP
17 - n SV PRN SINT8 ± (1-32) PRN
Byte Item Type Value Meaning
0 PV filter UINT8 0
1
Off
On
1 Static filter UINT8 0
1
Off
On
2 Altitude filter UINT8 0
1
Off
On
3 Kalman filter UINT8 0
1
Off
On
Byte Item Type Value Meaning
0 PV filter UINT8 0
1
Off
On
1 Static filter UINT8 0
1
Off
On
2 Altitude filter UINT8 0
1
Off
On
3 Kalman filter UINT8 0
1
Off
On
Byte Bit Item Type Value Meaning