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160 Z-Family Technical Reference Manual

Example: Enable GSA message on port B

$PASHS,NME,GSA,B,ON <enter>

$PASHQ,GSA,c

Query DOP and active satellites where c is the optional output serial port.

Example: Query GSA message to the current ports.

$PASHQ,GSA <enter>

$GPGSA

The response message is in the form:

$GPGSA,c1,d1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13,f1,

f2,f3*cc <enter>

Example:

Query: $PASHQ,GSA <enter>

Response:

$GPGSA,M,3,,02,,04,27,26,07,,,,,09,3.2,1.4,2.9*39 <enter>

Table 6.91: GSA Message Structure

Parameters Description Range

c1 Mode: M: manual, A: automatic ‘M’ / ‘A’

d1 Mode: 1: fix not available, 2: 2D, 3: 3D 1 -3

d2 - d13 Satellites used in solution (null for unused channel) 1 -32

f1 PDOP 0 - 9.9

f2 HDOP 0 - 9.9

f3 VDOP 0 - 9.9

*cc Checksum

Table 6.92: Typical GSA Message

Item Significance

$GPGSA Header

M Manual mode

3 3D mode

empty field Satellite in channel 1

02 Satellite in channel 2

1 2 ... 175 176 177 178 179 180 181 182 183 184 185 ... 261 262

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