108
922-00027001/2.2
Multipath Filter
The
Multipath Filter
is designed to remedy for reflections, spikes and time-lag in the
sensor data. These problems may occur if neighbouring channels are used, or if the
FM90 is disturbed by other hydroacoustic systems in use on your own or other vessels.
When you operate in areas with substantial reverberation due to the bottom conditions,
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 FM90 frequency range. This filter has been implemented to remedy
for such interference problems as well.
The default setting of the
Multipath Filter
is
On
.
Tip
We recommend that you switch this filter On if there are large fluctuations in
the displayed data, or if the rate of change is small. No filtering is preferable if
instantaneous readings are required, since this shortens the delay between updating
the changes in sensor data, and the corresponding displayed information.
Manual Gain
This function allows you to apply a selected amount of gain to the receiver circuitry. If
you decide to switch the AGC off you must set the gain manually.
The default and recommended setting is
0 dB
.
Related topics
Improving the catch monitoring sensor receive signal, page 62
Simrad FM90 Reference Manual
Содержание FM90
Страница 2: ......
Страница 140: ... 2018 Kongsberg Maritime ...