50 G12 OEM Board & Sensor Reference Manual
The query command message format is as follows:
$PASHQ,xxx,<optional query parameter>*hh<Enter>
Table 4.2 contains descriptions of the query command elements.
The query command $PASHQ,CRR instructs the G12 to output a response
message indicating the currently selected code correlation mode:
$PASHR,CRR,E,E,E,E,E,E,E,E,E,E,E,E*37
The query command $PASHQ,CR<Enter> is incomplete, and causes the G12 to
flag it as an invalid message by outputting the NAK response.
Table 4.3 contains a list of the set and query commands falling into the category of
receiver commands. The commands are listed alphabetically by function, and then
alphabetically within each function. The commands are described in detail in the
pages following Table 4.3.
Table 4.2. Query Command Structure
Field Description
$ NMEA message start character
PASHQ Proprietary Ashtech header for query messages.
xxx Message identifier.
<optional query parameter> Designates the data port from which the query response message is
to be sent.
* Checksum delimiter.
hh Hexadecimal checksum value (checksum is optional).
Table 4.3. Receiver Commands
Command Description Page
ANTENNA POSITION
$PASHS,ALT Set ellipsoidal height of antenna 54
$PASHS,POS Set base station reference position 86
$PASHQ,POS Query current position 86
$PASHS,POS,CUR Set current position as base station reference position 86
DILUTION OF PRECISION (DOP)
$PASHS,HDP Set HDOP mask for position computation 71
$PASHS,PDP Set PDOP mask for position computation 81
$PASHS,VDP Set VDOP mask for position computation 111
G12RevD.book Page 50 Tuesday, April 2, 2002 4:33 PM
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