Operation Manual

Simrad PI54
210
850-165186 / Rev.B
detection error disappears. Check that the signals from the
sensor in use are still being received, if they are not, the filter
will not be of help in this particular situation. The filter’s
effectiveness is both location and net specific. Therefore, the
same parameters will not necessary work in different areas or
using various types of nets. Default setting is 42 dB.
Detection Threshold (DT): This function will inhibit reception
of the weakest signals. If you experience problems with
interference signals generating false data and all of the
configured sensors are operative (analogous with the Multipath
problem); increase the Detection Threhold value carefully in
steps of 1 dB. High values allow only strong sensor signals to be
detected. A lower threshold value will provide greater range if
conditions are optimal, but if too low, interference will be
detected. It is best to experiment with different values to
determine which to employ.
Note: If the Detection Threshold (DT) value is set higher than 28 dB,
all signals will be prevented from being detected.
Max shooting speed: The PI54 has a built in doppler
compensation function which is configured using this parameter.
The parameter and related function is however only relevant if
sensor data is desired while the pur se seine is being deployed. It
has no effect once the vessel is stopped waiting for the net to
sink. Note that if you set this parameter too high, you can create
a conflict with the channel selection. Should this situation arise,
the following message will appear: Max shooting speed differs
from wanted, channels are set too close to each other.