Specifications

Channel Master Operation Manual
page 74 RD Instruments
10.10 Water Profiling Commands
The following commands define the criteria used to collect the water-profile
data.
10.10.1 Standard Water Profiling Commands
This section lists the most often used Water Profiling commands.
WA – False Target Threshold Maximum
Purpose Sets a false target (fish) filter.
Format WAnnn
Range nnn = 0 to 255 counts (255 disables this filter)
Default WA255
Recommended Setting. The default setting for this command is
recommended for most applications.
Description The Channel Master uses the WA-command to screen water-
track data for false targets (usually fish). WA sets the maxi-
mum difference between echo intensity readings among the
profiling beams. If the WA threshold value is exceeded, the
Channel Master rejects velocity data on a cell-by-cell basis for
either the affected beam (fish detected in only one beam) or
for the affected cell in all beams (fish detected in more than
one beam). This usually occurs when fish pass through one or
more beams.
Note A WA value of 255 turns off this feature.
WB – Mode 1 Bandwidth Control
Purpose Sets profiling mode 1 bandwidth (sampling rate). Low band-
width allows the Channel Master to profile farther, but the
standard deviation is increased by as much as 2.5 times.
Format WBn
Range n = 0 (High), 1 (Low)
Default WB0
Recommended Setting. The default setting for this command is
recommended for most applications.
Description The WB-command influences profiling range. If you narrow
the bandwidth of the system, the profiling range is increased.
See table below.