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ECHO SOUNDER RETURN DATA (con’t)
Byte 4
Serial Status
Bit 0 - 1 = Echo sounder
Bit 1 - 0
Bit 2 - 1 = Automatic External Trigger Mode available
Bit 3 - 0
Bit 4 - 0
Bit 5 - 0
Bit 6 - 1 = Switches Accepted
Bit 7 - 1 = Character Overrun
Byte 5
Reserved
Always 0
Byte 6
Reserved
Always 0
Byte 7
Range
Echo Sounder Range: 5 to 50 Meters
Byte 8 - 9
Profile Range
First digitized range value above threshold in centi-meters
Prof Rng (LO), Prof Rng (HI)
Byte 8
Byte 9
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
0
Prof Rng (LO)
0
Prof Rng (HI)
L
Prof Rng High Byte = (Byte 9 & 0x7E)>>1
Prof Rng Low Byte = [((Byte 9 & 0x01)<<7) | (Byte 8 & 0x7F)]
Profile Range = (Prof Rng High Byte<<8) | Prof Rng Low Byte
Byte 10 - 11
Data Bytes
Number of Echo Data Bytes returned
Data Bytes (LO), Data Bytes (HI)
Byte 10
Byte 11
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
0
Data Bytes (LO)
0
Data Bytes (HI)
L
Data Bytes High Byte = (Byte 11 & 0x7E)>>1
Data Bytes Low Byte = [((Byte 11 & 0x01)<<7) | (Byte 10 & 0x7F)]
Data Bytes = (Data Bytes High Byte<<8) | Data Bytes Low Byte
