EMAC PCM-3292, Руководство пользователя

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5.3 PPS Mode Commands
The following sections introduce commands used for controlling the one-pulse-per-second (PPS)
timing signal mode.
5.3.1 PPSMODE – Set Pulse Per Second Mode
Activates the One Pulse Per Second (1PPS) operating mode.
The PPS mode requires precise information about antenna positioning to allow precise
timing pulse. Thus PCM3292 supports several PPS modes for acquiring the antenna
position.
This command can be given only when navigation is stopped, otherwise an error code
results.
$PFST,PPSMODE,<mode>
<mode> PPS operating mode, may be one of the following:
0 = PPS mode off. PCM3292 doesn’t output PPS pulse.
1 = PPS survey mode. PCM3292 outputs PPS pulse.
2 = PPS static mode. PCM3292 outputs PPS pulse.
3 = PPS roving mode. PCM3292 outputs PPS pulse.
5.3.2 PPSPOS – PPS Static Mode Antenna Position
Sets the antenna coordinates for PPS static mode. The PCM3292 module can’t start
outputting the PPS signal until the antenna position is defined with this command.
$PFST,PPSPOS,xxmm.dddd,<N|S>,yyymm.dddd,<E|W>,d.d
xxmm.dddd Latitude
xx = degrees
mm = minutes
dddd = decimal part of minutes
<N|S> Either character N or character S, ( N = North, S =
South )
yyymm.dddd Longitude
yyy = degrees
mm = minutes
dddd = decimal part of minutes
<E|W> Either character E or character W, E = East, W = West
D Altitude, meters from sea level.
5.3.3 SURVEYLEN – PPS Survey Period Length
Set PPS survey mode averaging period length.
$PFST,SURVEYLEN,<LEN>
<len> Survey mode length (number of valid fixes that are averaged during the
survey mode).