Microchip Technology GPS-2700, Руководство пользователя

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SCPI-Control Quick Start Instructions
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2020 Microchip Technology Inc. DS50003016A-page 37
Similar to the GPS:GGAST command.This command instructs the GPS-2700 to send
a modified version of the NMEA standard string $GNGGA every N seconds, with N in
the interval [0,255]. The command is disabled during the initial 2 minute CSAC
warm-up phase.
This command has the following format:
GPS:GGAGNST <int> [0,255]
The GGAGNST string has the following data format:
$GNGGA,hhmmss.00,llll.llll,S/N,yyyyy.yyyy,W/E,l,ss,hh.h,aa.a,M,gg.g,M,,*[check-
sum]
This command replaces the regular NMEA GGA validity flag with a decimal number
indicating the lock-state of the unit. Please see Section 3.10.12 for a detailed descrip-
tion of the lock state variable. The command allows capture of the position and other
information available in the GGA command, as well as tracking the lock state and
health of the unit’s CSAC performance.
GGAGNST shows height in MSL Meters, this is different from traditional GPS receivers
that display height in GPS Meters. The difference between MSL and GPS height can
be significant, 35m or more are common.
3.3.15 GPS:GNRMC <int> [0,255]
GPS-2700 with firmware revision 0.75 and later and uBlox 8 GNSS receiver adds sup-
port for switching the talker ID mode between GP and GN for GGA, Microchip GGA,
RMC, and ZDA commands. See Section 3.3.32 for detailed operations and restrictions
on talker ID mode.
This command instructs the GPS-2700 to send the NMEA standard string $GNRMC
every N seconds, with N in the interval [0,255]. The command is disabled during the
initial 2 minute CSAC warm-up phase.
This command has the following format:
GPS:GNRMC <int> [0,255]
The GNRMC string has the following data format:
$GNRMC,hhmmss.00,s,llll.llll,S/N,yyyyy.yyyy,W/E,k.k,d.d,ddmmyy,,*[checksum]
3.3.16 GPS:GNZDA <int> [0,255]
GPS-2700 with firmware revision 0.75 and later and uBlox 8 GNSS receiver adds sup-
port for switching the talker ID mode between GP and GN for GGA, Microchip GGA,
RMC, and ZDA commands. See Section 3.3.32 for detailed operations and restrictions
on talker ID mode.
This command instructs the GPS-2700 to send the NMEA standard string $GNZDA
every N seconds, with N in the interval [0,255]. The command is disabled during the
initial 2 minute CSAC warm-up phase.
This command has the following format:
GPS:GNZDA <int> [0,255]
The GNZDA string has the following data format:
$GNZDA,hhmmss.00,dd,mm,yyyy,+00,00*[checksum]