214.2.16 DPGS Beacon Information (PGRMB)Note: The GPS 19x HVS does not support RTCM as a differential source. PGRMB is provided for backwardcompatibility.$PGRMB,<1>,<2>,<3>,<4>,<5>,K,<6>,<7>,<8>*hh<1> No Effect (This field is not used on this model and is included only for backward compatibility)<2> No Effect (This field is not used on this model and is included only for backward compatibility)<3> No Effect (This field is not used on this model and is included only for backward compatibility)<4> No Effect (This field is not used on this model and is included only for backward compatibility)<5> Distance to beacon reference station in kilometers<6> No Effect (This field is not used on this model and is included only for backward compatibility)<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 (DGPS disabled)4.3 BAUD RATE SELECTIONBaud rate selection can be performed by sending the appropriate configuration sentence to the GPS sensor asdescribed in the PGRMC section 4.1.2 Sensor Initialization Information (PGRMI), field <10>.4.4 MEASUREMENT PULSE OUTPUT4.4.1 One-Pulse-Per-Second (PPS) OutputThe highly accurate one-pulse-per-second (PPS) output is provided for applications requiring precise timingmeasurements. After the initial position fix has been calculated, the PPS signal is generated and continues until theunit is powered down. The rising edge of the signal is aligned to the start of each GPS second within 1 s for allconditions in which the receiver has reported a valid and accurate position for at least the previous 4 seconds.The NMEA 0183 sentences that follow each rising edge of the PPS signal tell when you were and where you were atthat previous rising edge of the PPS signal, beginning with the RMC sentence as the lead sentence in any particularNMEA 0183 record. If RMC sentence is not enabled then another sentence will be the lead sentence.Regardless of the selected baud rate, the information transmitted by the GPS 19x HVS is referenced to the pulseimmediately preceding the NMEA 0183 RMC sentence.The accuracy of the one-pulse-per-second output is maintained only while the GPS receiver is computing a validposition fix. To obtain the most accurate results, the one-pulse-per-second output should be calibrated against a localtime reference to compensate for cable and internal receiver delays and the local time bias.The default pulse width is 100 ms, however; it may be programmed in 20 ms increments between 20 ms and 980 msas described in PGRMC section 4.1.2 Sensor Initialization Information (PGRMI), field <13>.
