ashtech DG16 Reference Manual page 133

(e.g. due to the lack of current RTCM correction) the AUT mask parameters will be
used until differential position fixes are computed, which will be masked by the DIF
parameters.
Example
Enter the following command to set the horizontal error mask to 2 meters and the
vertical error mask to 4 meters for all positioning modes:
$PASHS,ERM,ALL,2,4
ERM
Users who currently use the RMS and standard deviation information reported in the GST message,
and who also use the PDOP mask to screen out position fixes in less than favorable conditions, may
choose to disable the additional ERM masking feature. To disable the ERM, use the default ERM
settings or issue the command: $PASHS,ERM,ALL,6000,6000.
$PASHQ,ERM,c1
This command queries the error mask values for AUT, DIF, and CPD modes.c1 is
the optional port designator for the output of the response. If a port is not specified,
the receiver sends the response to the current port.
$PASHR,ERM
The response is in the format:
$PASHR,ERM,d1,d2,d3,d4,d5,d6
where Table 6.19 outlines the response format.
Parameter
d1
d2
d3
d4
Receiver Commands
DEFAULT SETTING
Positioning Mode Horizontal Mask
Autonomous 600 m
Code Differential 300 m
Table 6.19. ERM Message Structure
Error mask horizontal setting for AUT.
Error mask vertical setting for AUT.
Error mask horizontal setting for DIF.
Error mask vertical setting for DIF.
Vertical Mask
1200 m
600 m
Definition
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