EMAC PCM-3292, Руководство пользователя

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5.3.4 CABLEDEL – Set PPS Cable Delay
Set 1PPS mode cable delay.
$PFST,CABLEDEL,<DELAY>
< DELAY > Cable delay in units of 0.01 ms. The cable delay can be either positive
or negative in range of approx –21 .. +21 ms.
5.3.5 PULSEPOL – Set PPS Pulse Polarity
Set PPS mode electric pulse polarity.
$PFST,PULSEPOL,<POL>
< POL > 0 = The PPS signal sets from high to low at PPS pulse
1 = The PPS signal raises from low to high at PPS pulse
5.3.6 PULSELEN – Set 1PPS Pulse Length
Set PPS mode electric pulse length.
$PFST,PULSELEN,<LEN>
< LEN > 1 PPS pulse length in ms. ( range 10 – 900 ms)
5.4 Navigation Aiding Commands
The following sections introduce the commands that provide the PCM3292 receiver with
additional data, which may be helpful for starting and during navigations.
5.4.1 INITAID – Initial Position And Time Aiding
Gives the PCM3292 module the current position and time information for aiding the
navigation startup. Setting this information before navigation starts with the
$PFST,START command reduces the time required for finding the satellites, and receiving
the first valid navigation fix.
If the position isn’t known, the initial time may also be given alone by omitting the position
parameters, i.e. using the command with only the two first parameters. The altitude
information is not critical and can be set to zero (i.e. mean sea level) if not known.
NOTE: Even when INITAID is being used, the PCM3292 module reports navigation data of
the previous actual navigation fix until a new fix is acquired, not the position and time data
given in the INITAID command.
$PFST,INITAID,<time>,<date>,<lat>,<N/S>,<long>,<E/W>,<altitude>
<time> UTC time in “hhmmss.dd” format, hh = hours (2 digits), mm = minutes
(2 digits), ss.dd = seconds with two decimals (2+2 digits).
<date> UTC date in “ddmmyy” format, dd = day (2 digits), mm = month (2
digits), yy = year (2 digits).
<lat> Latitude in degrees and minutes in “xxmm.dddd” format, xx = degrees
(1-2 digits), mm.dddd = minutes with four decimals (2+4 digits).
<N/S> Either a character N or S (N = north, S = south).
<long> Longitude in degrees and minutes in “yyymm.dddd” format, yyy =
degrees (1-3 digits), mm.dddd = minutes with four decimals (2+4
digits).
<E/W> Either a character E or W (E = east, W = west).
<altitude> Altitude from the sea level in meters (1-5 digits).