Navman 11 User Manual

36

MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.

Message ID: 1214
Rate: as required (maximum rate 1 Hz)
Message length: 9 words

1-4

Message header

5

Header checksum

6

Sequence number (Note 1)

I

0 to 32 767

7.0

DGPS disable

bit

1 = disable

7.1

Correction data base reset

bit

1 = reset

7.2-7.15

Reserved

8

Correction timeout

UI

0 to 32 767

9

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.

Message ID: 1216
Rate: as required (maximum rate 1 Hz)
Message length: 9 words

1-4

Message header

5

Header checksum

6

Reserved (sequence number)

I

0 to 32 767

7.0

Cold start disable

Bit

1 = disable

7.1-7.15

Reserved

8

Cold start timeout

UI

s

0 to 32 767

9

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.

This message allows the user to control the 

behavior of the receiver’s differential capability. 

Storage of this message’s parameters requires 

EEPROM. The contents of the ‘DGPS control’ 

message are described in Table 3-28.

This message allows the user to disable the cold 

start acquisition mode of the receiver. When cold 

start is enabled at power-on, the cold start timer 

is set to 0. If a satellite is not acquired before the 

cold start time-out is exceeded, the cold start 

acquisition mode starts. If a satellite is acquired, 

the cold start timer is reset to 0, the receiver is 

re-positioned under the satellite, and the search 

continues until either the receiver navigates or the 

timer is exceeded. 

Cold start acquisition mode does not use the initial 

conditions of position, time, and almanac. This 

causes the receiver to look at a wider range of 

frequencies and satellites. The default cold start 

timer is 5 minutes. Normal operation is to leave 

cold start enabled. However, in certain enclosed 

situations (e.g. garages, houses, office buildings, 

etc.), faster acquisitions may be achieved with 

cold start disabled storage of the cold start disable 

parameter requires EEPROM. The contents of 

the ‘cold start control’ message are described in 

Table 3-29.