Message 1108 (Utc Time Mark Pulse Output) - Navman 12 Designer's Manual

3.5.1.10 Message 1108 (UTC time mark pulse output)

This message provides the UTC seconds into
week associated with the UTC synchronised time
mark pulse. This message is output approximately
Message ID: 1108
Rate: 1 Hz
Message length: 20 words
Word No.
1-4 Message header
5 Header checksum
6-7 Set time (Note 1)
8 Sequence number (Note 2)
9-13
14-15 UTC Seconds Of Week
GPS to UTC time offset (integer
16
GPS to UTC time offset (fractional
17-18
19.0 Time mark validity
19.1 GPS/UTC sync
19.2-19.15
20 Data checksum
Note 1: Set time is an internal 10 millisecond (T10) count since power-on initialisation enabled the processor interrupts. It is not used
to derive GPS time, but only serves to provide a sequence of events knowledge. The set time or T10 count references the receiver's
internal time at which the message was created for output. The T10 range is approximately 71 weeks.
Note 2: The sequence number is a count that indicates whether the data in a particular binary message has been updated or
changed since the last message output.
MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Name
Reserved
part)
part)
UTC time validity (19.0-19.15)
Reserved
Table 3-14 Message 1108 (UTC time mark pulse output)
400 milliseconds before the time mark pulse strobe
signal. The contents of the 'UTC time mark pulse
output' message are described in Table 3-14.
Type Units
UDI 10 ms ticks
I
UTC time
UDI s
I s
UDI ns
Bit
Bit
Range Resolution
0 to 4 294 967 295
0 to 32 767
0 to 604 799
–32 768 to +32 767
0 to 999 999 999
1 = true
0 = GPS
1 = UTC
1 s
1 s
1 ns
24