190-00879-08
GPS 18x Technical Specifications
Rev. B
Page 7
1.6.4.3
GPS 18x PC, GPS 18x LVC, & GPS 18x-5Hz Protocols
•
NMEA 0183 Version 2.0 or NMEA 0183 Version 2.30 (Version 2.0 is factory default, programmable by
data field 7 of the PGRMC1 sentence described in section
4.1.4 Additional Sensor Configuration
•
Available NMEA 0183 output sentences include GPALM, GPGGA, GPGSA, GPGSV, GPRMC, GPVTG,
GPGLL, PGRME, PGRMF, PGRMM, PGRMT, PGRMV, and PGRMB (Garmin proprietary sentences).
See section
4.2 Transmitted NMEA 0183 Sentences
for format descriptions.
•
Configuration and initialization is accomplished with NMEA 0183 input sentences. Allows initialization of
information such as expected position, date, time, earth datum, and differential mode. See section
for format descriptions.
•
Configurable for binary data output.
1.6.4.4
Measurement Pulse Output (GPS 18x LVC & GPS 18x-5Hz only)
•
GPS 18x LVC: 1 Hz pulse with programmable width, configurable in 20 ms increments form 20 ms to 980
ms. See section
4.1.3 Sensor Configuration Information (PGRMC)
for details about configuring the
Measurement Pulse Output (or PPS) feature.
•
GPS 18x-5Hz: 5 Hz pulse synchronized with the time of fix. One of the five pulses will align with the UTC
second boundary. The pulse width is programmable from 20 ms to 180 ms. The PGRMC sentence will
indicate which pulse is at the top-of-the-second. See section
4.1.3 Sensor Configuration Information
for details about configuring the Measurement Pulse Output (or PPS) feature.
•
1
μ
s accuracy for all conditions in which the GPS 18x LVC or GPS 18x-5Hz has reported a valid and
accurate position fix for at least the previous 4 seconds.
