Specifications

Channel Master Operation Manual
P/N 95B-6001-00 (January 2005) page 93
The Channel Master packs velocity data for each range cell of each beam
into a two-byte, two’s-complement integer [-32768, 32767] with the LSB
sent first. The Channel Master scales velocity data in millimeters per sec-
ond (mm/s). A value of –32768 (8000h) indicates bad velocity values. All
velocities are relative based on a stationary instrument.
The setting of the EX-command (Coordinate Transformation) determines
how the Channel Master references the velocity data as shown below.
EX-CMD COORD SYS VEL 1 VEL 2
xxx00xxx BEAM TO BEAM 1 TO BEAM 2
xxx01xxx INST Bm2-Bm1 FROM TRANSDUCER
POSITIVE VALUES INDICATE WATER MOVEMENT
Table 20: Velocity Data Format
Hex Digit Binary
Byte
Field Description
1-4 1,2 Velocity ID Stores the velocity data identification word 0100 (00 01h). LSB
is sent first.
5-8 3,4 Range cell 1,
Velocity 1
Stores velocity data for range cell #1, velocity 1. See above.
9-12 5,6 Range cell 1,
Velocity 2
Stores velocity data for range cell #1, velocity 2. See above.
13-16 7,8 Reserved Reserved
17-20 9,10 Reserved Reserved
21-2052 11-1026 Cells 2 – 255
(if used)
These fields store the velocity data for range cells 2 through
255 (depending on the setting of the WN-command). These
fields follow the same format as listed above for range cell 1.