406388/F
297
Water Profile
Use this setting to set up the TV80 system for operation in fresh or salt water.
Detection Threshold (DT)
This parameter is used to control the threshold level for detection of signals.
Signals below the threshold level will not be detected, while signals above the
threshold will be detected. Setting the threshold level too low may cause false
signals to be detected. If the detection threshold is set too high, the signal from the
catch monitoring sensor will not be detected.
For the TV80 system, two different parameter ranges are used.
•
3 to 14
By increasing the parameter value, the threshold level is increased.
•
15 to 20
By increasing the parameter value, the threshold level is decreased.
The default value for
Detection Threshold (DT)
is
17
.
Max shooting speed
The TV80 has a built-in Doppler compensation function which is set up using this
parameter. The parameter and related function is, however, only relevant if sensor
data is desired while the purse seine or trawl is being deployed. It has no effect
once the vessel is stopped and waiting for the net or trawl to sink.
Note
If you set this parameter too high, you may create a conflict with the channel
selection.
Related topics
Defining receiver parameters for the PI50 and PI60 Receiver Units, page 121
Adjusting the receiver sensitivity for the PI50 and PI60 Receiver Units, page 151
Defining the serial line communication parameters for the PI50 and PI60 Receiver
Units, page 66
Setting up the PI50 and PI60 Receiver Units on a serial line input, page 118
Reducing noise disturbance from the data received on a SR15 or SR70 Receiver Unit,
page 152
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