Navman 11 User Manual

Page of 90
43
MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Message ID: 1317
Rate: As required - maximum rate 1 Hz
Message Length: 8 words
Word No.
Name
Type
Units
Range
1-4
Message header
5
Header checksum
6
Sequence number (Note 1)
I
0 to 32 767
7
Power management on duty cycle (Note 2)
I
s
0 = off
1 to 4 = on
8
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: In power management mode, the RF power may be switched off to reduce power consumption. The digital circuitry may be 
gated off and the processor idled when not needed. This field gives the measurement engine permission to turn off the RF for the 
minimum off time in seconds.
 Table 3-37 Message 1317 (power management control)
3.5.2.15 Message 1317 (power management 
control). 
This message controls the use of power 
management in the receiver. The contents of 
the ‘power management control’ message are 
described in Table 3-37. 
Note: Message 1317 is primarily used to input key 
parameters from GPS systems without non-volatile 
storage. This is why the format of output message 
1117 is exactly the same. In other words, the output 
message is used to capture data while the input 
message is used to restore data.