ashtech DG14, Reference Manual

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Differential Commands 291
Differential Commands
This message is applicable to receivers in RTCM BASE mode only. A base receiver
continues to transmit corrections on the old ephemeris in the navigation solution
until it receives an ephemeris update. After receiving new ephemeris, the receiver
waits for the offset period (d) before transmitting corrections using the new
ephemeris (IODE).
$PASHQ,RTC,IOD,[c1]
This command queries for the time period for when the RTCM base station switches
to a new issue of the ephemeris data, 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,RTC,IOD
The response is in the format:
$PASHR,RTC,IOD,d*cc
where d is the set IOD switch period in seconds.
MAX: Maximum Age Threshold for Differential Corrections
$PASHS,RTC,MAX,d1
This command sets the maximum age for incoming RTCM differential corrections,
where d1 is any number between 1 and 9999. The receiver ignores incoming
corrections whose age exceeds the maximum age setting. The default value is 60.
The maximum age setting applies to remote differential stations only. You can view
the current maximum age setting by entering the query command
$PASHQ,RTC
and checking the MAX field.
Enter the following command to set the maximum age to 30 seconds:
$PASHS,RTC,MAX,30
MSG: Define RTCM Type 16 Message
$PASHS,RTC,MSG,s1
This command defines an ASCII message of up to 90 characters which can be
enabled for broadcast by the RTCM base station. The contents of this message
can be obtained in different ways depending on whether the receiver is configured
as a base station or a remote station. In the case of the base station, you can issue
DEFAULT SETTING
RTC,MAX— 60