ashtech HDS800, Справочное руководство

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Chapter 6. Using Serial Commands
Introduction to Serial Commands
Serial commands allow you to communicate directly with the
receiver in its proprietary command language. Serial
commands can be used for various purposes such as:
• Changing default settings
• Monitoring different receiver statuses (internal operation,
constellations, etc.)
• Outputting messages on request
• Installing firmware options, etc.
Serial commands fall into two categories:
• Set commands ($PASHS,...), used to set or modify the
receiver’s internal parameters.
• Query commands ($PASHQ,...), used to interrogate the
receiver.
The few conventions used to describe the serial commands in
this manual are summarized in the table below.
String or
sign
Description
$PASHS Header for set commands (Whole line shown in bold characters)
$PASHQ Header for query commands (Whole line shown in bold characters)
$PASHR Receiver response line, in normal characters.
$--
Header prefix for all standard NMEA messages delivered by the
receiver.
[ ] Optional field or parameter
, Field delimiter
. Decimal point (used in f-type fields)
c.. One-character string
d.. Integer
f.. Real number, with decimal places
h.. Parameter in hexadecimal notation
m..
Denotes specific data format used, such as angles (e.g.
ddmm.mmm) or time (e.g. hhmmss.sss)