ashtech DG14, Справочное руководство

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252 DG14 and DG16 Board & Sensor Reference Manual
Example
Enter the following command to enable the LTN output message on port B.
$PASHS,NME,LTN,B,ON
$PASHQ,LTN,[c1]
This command queries the LTN message, where 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,LTN
This single-field message is output even if a position is not computed. Latency is
defined as the number of milliseconds it takes the receiver to compute a position
(from the position fix tag time) and prepare data to be output through the serial port.
The latency range is typically between 20 and 40 milliseconds, depending on the
number of satellites tracked and the number of satellites used in the position
solution. The response is output in the format:
$PASHR,LTN,d1*hh
Table 8.24 outlines the message format.
Typical LTN message:
$PASHR,LTN,29*05
Table 8.25 outlines the response message.
Table 8.24. $PASHR,LTN Message Format
Parameter Description Range
d1 Latency value (milliseconds) 20 to 99
*hh Checksum 2-character hex
Table 8.25. $PASHQ,LTN Query Response
Field Significance
$PASHR,LTN Header
29 Latency value (milliseconds)
05 Checksum