45MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.Message ID: 1331Rate: As required (maximum rate 1 Hz)Message Length: 9 wordsWord No. Name Type Units Range1-4 Message header5 Header checksum6 Sequence number (Note 1) I 0 to 32 7677 Reserved (must be zeroed out) I8 Protocol type (Note 2) I0 = binary1 = NMEA2 = RTCM SC-1049 Data checksumNote 1: The sequence number is a count that indicates whether the data in a particular binary message has beenupdated or changed since the last message input.Note 2: RTCM SC-104 is not a valid protocol for the host data stream.Table 3-39 Message 1331 (message protocol control)Message ID: 1350Rate: As required (maximum rate 1 Hz)Message Length: 10Word No. Name Type Units Range Resolution1-4 Message header5 Header checksum6 Sequence number (Note 1) I 0 to 32 7677 Oscillator temperature (Note 2) I o C –40 to +85 0.018-9 Oscillator frequency error I ppm 0 to ±51 0.0110 Data checksumNote 1: The sequence number is a count that indicates whether the data in a particular binary message has beenupdated or changed since the last message input.Note 2: Externally supplied temperature measurement. An external temperature input causes the internal temperaturesensor to be ignored as a source of temperature data.Table 3-40 Message 1350 (factory calibration input)3.5.2.17 Message 1331 (message protocol control)This message allows the user to set the messageformat protocol which will be used to communicateinformation to and from the receiver throughthe host serial I/O port. Currently, the availableprotocols are binary (with fixed-point numbers)and NMEA-0183. Storage for the protocol typeparameter requires EEPROM. The contents of the‘message protocol control’ message are describedin Table 3-39.3.5.2.18 Message 1350 (factory calibration input).This message is used to inform the system aboutthe quality of the frequency standard being used.The contents of the ‘factory calibration input’message are described in Table 3-40
