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Appendix G -
NMEA 0183 search string handling
Each NMEA input #1-4 can be programmed to search for two different NMEA
0183 strings. Each NMEA search string is identified with a one digit “Talker”
index which point to a talker identifier such as “GP” for GPS, a one digit “Search
String” index which points to a 3 character search string such as “RMC” and a
one digit “Comma Counter”. The talker index, identifier and comma counter are
stored as part of the Display Configuration.
Limitations on NMEA string decoding:
a) Numbers larger than 9999 will display as “----” on a 4 digit display
b) Numbers larger than 999 will display as “---” on a 3 digit display
c) Negative numbers smaller than (less than) -999 will display as “----” on a 4
digit display
d) Negative numbers smaller than (less than) -99 will display as “---” on a 3
digit display
f)
The bar charts will display both positive and negative NMEA 0183 numbers
as positive.
Talker
Index
Talker ID Code
0
None - not used
1
AG Autopilot - General
2
AP Autopilot - Magnetic
3
CC Computer - Programmed Calculator (outdated)
4
CD Communications - Digital Selective Calling (DSC)
5
CM Computer - Memory Data (outdated)
6
CR Data Receiver
7
CS Communications - Satellite
8
CT Communications - Radio-Telephone (MF/HF)
9
CV Communications - Radio-Telephone (VHF)
10
CX Communications - Scanning Receiver
11
DE DECCA Navigation (outdated)
12
DF Direction Finder
Содержание MaxVu110
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