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MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
3.5.2.20 Message 1360 (frequency standard table
input data).
This message allows the user to input the
parameters and table data used in the receiver’s
frequency standard compensation model. It
is intended that this message will be used in
conjunction with message 1160 to retrieve and
restore this information for external storage. The
contents of the ‘frequency standard table input
data’ message are described in Table 3-42.
3.5.2.21 Message 1380 (flash reprogram).
This message is used only in the Jupiter flash
board to force the receiver into the re-program
flash mode. The contents of the ‘flash re-program’
message are described in Table 3-43.
Message ID: 1360
Rate: As required - maximum rate 1 Hz
Message Length: 268 words
Word No. Name Type Units Range Resolution
1-4 Message header
5 Header checksum
6 Sequence number (Note 1) I 0 to 32767
7 Table frequency offset (Note 2) I ppm 0 to ±51 0.15
8.0 Table frequency offset valid (Note 3) Bit 1 = valid
8.1-8.15 Reserved
9 Offset error estimate (Note 4) I ppm 0 to ±51 0.002
10 Aging rate estimate (Note 5)
I ppm/yr 0 to ±5 0.0002
11 last rate update week (Note 6)
I weeks 0 to 32767 1
12-267
Frequency standard table (Note 7):
LSB
MSB
UI
weeks
ppm
0 to 1023
0 to ±19.05
4
0.15
268 Data checksum
Note 1: 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 input.
Note 2: Each value of frequency error in the table shares this common offset value.
Note 3: Flag to indicate that the offset has not been established.
Note 4: Filtered estimate of accumulated error in the table offset value.
Note 5: Filtered estimate of the current ageing rate.
Note 6: Whole week number of the last update of the ageing rate.
Note 7: LSB = the approximate time of last table entry update. MSB = the frequency error at each table temperature, less the table
offset.
Table 3-42 Message 1360 (frequency standard table input data)
Message ID: 1380
Rate: As required
Message Length: 7 words
Word No. Name Type Units Range
1-4 Message header
5 Header checksum
6 Request flag Boolean
0 = false
nonzero = true
7 Data checksum
Note: This message does not provide the sequence number as word 6.
Table 3-43 Message 1380 (flash re-program)