User Manual Part 2

IS-900 User Guide Page 84 of 159
To decode each of the Config bytes
Config Byte 0 Unused
Config Byte 1 Corresponds to the Perceptual Enhancement
Level.
Can be 0, 1, or 2. The remaining 2 bits are
reserved for future expansion of this option.
Config Byte 2
Bit Meaning
0 Reserved
1 Heading Compensation Mode bit 1
2 Heading Compensation Mode bit 2
3 Reserved
Heading compensation bits are translated as:
00 – Compass mode 0 (compass is off)
01 – Compass mode 1 (Partial compass mode)
10 – Compass mode 2 (Full compass mode)
Prediction Interval Record This record is sent in response to Mp{stationNum}<>
command. It returns an ASCII integer for the number of
milliseconds of prediction.
3{stationNum}p{interval}<>
Bytes Explanation
1 Record type , '3'
2 Station Number. A hexadecimal number up to C.
3 Sub-Record type, 'p'
4-5 Prediction interval.
6,7 CR, LF
Sensitivity Level Record This record is sent in response to MQ{station number}<>
command. It returns the current sensitivity settings of a
station. This setting is only relevant when Perceptual
Enhancement level is set to 1 or 2.
3{Station Number}Q{Sensitivity Level}<>
Bytes Explanation
1 Record type , '3'
2 Station Number. A hexadecimal number up to C.
3 Sub-Record type, 'Q'
4 Sensitivity level 1 to 5
5,6 CR, LF