Garmin HVS 16X Technical Specifications - Page 16

4.1.2 Sensor Initialization Information (PGRMI) The $PGRMI sentence provides information used to initialize the GPS sensor's set position and time used for satellite acquisition. Receipt of this sentence by the GPS sensor causes the software to restart the satellite acquisition process. If there are no errors in the sentence, it will be echoed upon receipt. If an error is detected, the echoed PGRMI sentence will contain the current default values. Current PGRMI defaults (with the exception of the Receiver Command, which is a command rather than a mode) can also be obtained by sending $PGRMIE to the GPS sensor. $PGRMI,,,,,,,*hh Latitude, ddmm.mmm format (leading zeros must be transmitted) Latitude hemisphere, N or S Longitude, dddmm.mmm format (leading zeros must be transmitted) Longitude hemisphere, E or W Current UTC date, ddmmyy format Current UTC time, hhmmss format Receiver Command, A = Cold Start, R = Unit Reset 4.1.3 Sensor Configuration Information (PGRMC) The $PGRMC sentence provides information used to configure the GPS sensor's operation. Configuration parameters are stored in non-volatile memory and retained between power cycles. The GPS sensor will echo this sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC sentence will contain the current default values. Current default values can also be obtained by sending $PGRMCE to the GPS sensor. $PGRMC,,,,,,,,,,,,,,*hh Fix mode, A = Automatic, 3 = 3D exclusively Altitude above/below mean sea level, -1500.0 to 18000.0 meters Earth datum index. If the user datum index (96) is specified, fields through must contain valid values. Otherwise, fields through must be null. Refer to Appendix A: Earth Datums for a list of earth datums and the corresponding earth datum index. User earth datum semi-major axis, 6360000.000 to 6380000.000 meters (.001 meters resolution) User earth datum inverse flattening factor, 285.0 to 310.0 (10-9 resolution) User earth datum delta x earth centered coordinate, -5000.0 to 5000.0 meters (1 meter resolution) User earth datum delta y earth centered coordinate, -5000.0 to 5000.0 meters (1 meter resolution) User earth datum delta z earth centered coordinate, -5000.0 to 5000.0 meters (1 meter resolution) Differential mode, A = Automatic (output DGPS data when available, non-DGPS otherwise), D = Differential exclusively (output only differential fixes) NMEA 0183 Baud rate, 3 = 4800, 4 = 9600, 5 = 19200, 8 = 38400 No Effect (This field is not used on this model and is included only for backwards compatibility) PPS mode, 1 = Off, 2 = On PPS pulse length, 0 though 48 = (n+1)*20 ms. Example: n = 4 corresponds to a 100 ms wide pulse Dead reckoning valid time 1 to 30 (sec) All configuration changes take affect after receipt of a valid value except baud rate and PPS mode. Baud rate and PPS mode changes take effect on the next power cycle or an external reset event. 190-00228-08 GPS 16x Technical Specifications Page 12 Rev. B