Simrad PI50 - REFERENCE MANUAL REV A Reference Manual page 154

Simrad PI50
• : This is the automatic gain control.
AGC
During normal operation, Off is the recommended (and default) setting.
• : If you decide to switch the AGC off you must set the gain manually.
Manual gain
The default and recommended setting is Medium.
• : This is an interference filter.
Multipath filter
The
Multipath Filter
sensor data. These problems may occur if neighbouring channels are used, or if the
PI50 is disturbed by other hydroacoustic systems in use on own or other vessels.
Figure 26 Spikes
When you operate in an areas with substantial reverberation due to the bottom
topography, or in shallow waters, you may experience "jumps" or spikes in the
data received from the sensors. Such errors can also be caused by other types of
hydroacoustic equipment operating on the PI50 frequency range. This filter has been
implemented to remedy for such interference problem as well.
– : The filter is switched off.
Off
– : The filter is on. This is the default setting.
On
The filter level can be monitored in the
filter individually by means of the
→ Status Display on page 133
→ Multipath Filter on page 128
• : This parameter sets up the PI50 for operation in fresh or salt water.
Water profile
The current profile can be monitored in the
is Salt.
→ Status Display on page 133
•
Detection Threshold (DT)
detection of signals.
Signals below the threshold level will not be detected, while signals above the
threshold will be detected. If threshold level too low this may cause false signals
to be detected.
152
is designed to remedy for reflections, spikes and time-lag in the
A
B
Status Display
Multipath Filter
: This parameter is used to control the threshold level for
Stable data reading
Spike caused by reflections, time-lag,
reverberation or interference
dialog. You can also control the
button on the
dialog. The default setting
Status Display
menu.
Main
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