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The period of the strobe is a function of the period factor times the recording interval
(RCI). For example, if the period factor is set to 3 and the RCI is set to 2 seconds, then
the period of the strobe will be 6. The offset is offset from GPS system time if the
SYS parameter is set to GPS or MIX, and to GLONASS system time (UTC+3 hours)
if SYS is set to GLO. Default parameters are 1,0,0,R. The accuracy of the strobe pulse
is the same as for the PPS pulse.
Parameter
d1
f1
c1
Example: Set the measurement strobe to have a period factor of 5, and offset of 10
milliseconds, and set the synchronization edge to be the falling edge.
$PASHQ,STB,x
The associated query command is $PASHQ,STB,x, where x is the optional output
port.
$PASHR,STB
The receiver response message is in the form:
where the parameters are described in Table 6.30.
SVP: Select Satellite to Use in Position Computation
$PASHS,SVP,c1,c2,c3.....c56
This command selects the satellites to use in position computation, where c is Y (use)
or N (not use). Up to 56 satellites may be selected, and are entered in the order of the
PRN number.
Example: Use 1-15, 21-32, 38-42, and 48-56; do not use 16-20, 33-37, and 43-47
108
Table 6.30: STB Structure
Period factor. Determines the period of the pulse in seconds by
the function (d1 *RCI) where d1 is the period factory and RCI is
the recording interval.
Offset from system time in milliseconds
Edge setting. Synchronizes the pulse to either the rising edge ®
or the falling edge (F).
$PASHS,STB,5,10,0,F<Enter>
$PASHR,STB,d1,f1,c1*cc
$PASHS,SVP,YYYYYYYYYYYYYYYNNNNNYYYYYYYYYYYYN
NNNNYYYYYNNNNNYYYYYYYYY<Enter>
Description
GG Surveyor GPS+GLONASS Reference Manual
Range
Default
0-9999
1
+999.9999
0.0
'R', 'F'
R
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