Kongsberg Simrad TV80, Reference Manual

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406388/F
Catch/Bottom Filter
This is a median filter. The
Catch/Bottom Filter
is used to restrict the change of
state from the catch and bottom contact sensors. This will reduce jitter in the
presentation.
The default setting of the filter is Weak .
• In
Off
mode, the filter is disabled.
• In Weak mode, the data from the last three sensor transmissions are median
filtered.
• In Medium mode, the data from the last five sensor transmissions are median
filtered.
• In Strong mode, the data from the last seven sensor transmissions are median
filtered.
Noise level
The
Noise level
refers to the common or general noise level picked up by the
hydrophone. When noise appears in the same frequency range as the sensors are
using for their communication, the resulting information may be unstable or
unreadable. The graph in the
Spectrum
dialog box provides you with information
about the background noise and the signal strength in the selected frequency band.
• Select
Low
if the signal level from your sensors is high in comparison to the
general noise level.
• When the signal level of the sensors installed is not significantly higher than
the general noise level, then you can select
High
. By selecting
High
you are
increasing the range of detection if you are operating at the limit of the expected
detection range. However, you are more sensitive to interference.
Related topics
Adjusting the receiver sensitivity for the PI50 and PI60 Receiver Units, page 151
Reducing noise disturbance from the data received on a SR15 or SR70 Receiver Unit,
page 152
Reset Catch Counters function
The presentations provided for catch monitoring sensors have a timer feature. Select this
option to reset the built-in timer function.
How to open
This function is opened from the
Operation
menu.
Simrad TV80 Reference Manual