190-00266-01 GPS 15H & 15L Technical Specifications Rev. DPage 194.2.13 Sensor Status Information (PGRMT)The Garmin Proprietary sentence $PGRMT gives information concerning the status of the GPS sensor.This sentence is transmitted once per minute regardless of the selected baud rate.$PGRMT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh<1> Product, model and software version (variable length field, e.g., “GPS 15H & 15L VER2.05”)<2> ROM checksum test, P = pass, F = fail<3> Receiver failure discrete, P = pass, F = fail<4> Stored data lost, R = retained, L = lost<5> Real time clock lost, R = retained, L = lost<6> Oscillator drift discrete, P = pass, F = excessive drift detected<7> Data collection discrete, C = collecting, null if not collecting<8> GPS sensor temperature. Use for a reference only, but could be null<9> GPS sensor configuration data, R = retained, L = lost<10> P = pass (Antenna is NOT shorted), F = fail (Antenna is shorted)Note: This field is only available on units whose serial numbers are in the range listedbelow:010-00240-01 GPS 15H-W serial number between 27700000 through 27799999010-00240-02 GPS 15L-W serial number between 27800000 through 27899999010-00240-11 GPS 15H-F serial number between 27900000 through 27999999010-00240-12 GPS 15L-F serial number between 28000000 through 280999994.2.14 3D velocity Information (PGRMV)$PGRMV,<1>,<2>,<3>*hh<1> True east velocity, -514.4 to 514.4 meters/second<2> True north velocity, -514.4 to 514.4 meters/second<3> Up velocity, -999.9 to 9999.9 meters/second4.2.15 DGPS Beacon Information (PGRMB)$PGRMB,<1>,<2>,<3>,<4>,<5>,K,<6>,<7>*hh<1> Beacon tune frequency, 0.0, 283.5–325.0 kHz in 0.5 kHz steps<2> Beacon bit rate, 0, 25, 50, 100, or 200 bps<3> Beacon SNR, 0 to 31<4> Beacon data quality, 0 to 100<5> Distance to beacon reference station in kilometers<6> Beacon receiver communication status (0 = Check Wiring, 1 = No Signal, 2 = Tuning, 3 =Receiving, 4= Scanning)<7> DGPS fix source (R = RTCM, W = WAAS, N = Non-DGPS Fix)<8> DGPS mode, A = Automatic, W = WAAS Only, R = RTCM Only, N = None (DGPSdisabled)
