Operation Manual

Simrad PI54
104
850-165186 / Rev.B
Sensor configuration
Communication channels and update rates
All sensors are provided from the factory with pre-defined
communication channels and update rates.
Sensor Com.channel Update rate
PI Bottom Contact 6 Normal
PI Catch 4 Normal
PI Depth (300 m) 16 Fast
PI Depth (600 m) 12 Fast
PI Depth (1000 m) 10 Fast
PI Height 14 Fast
PI Spread 2 Fast
PI Twin Spread 2 and 7 Fast
PI Temperature 8 Fast
Factory default communication channels and update rates
Changing a transmission channel
It may be required to change one or more transmission channels,
and there may be many reasons for this.
• You have more than one of each sensor. For example, if you
have three temperature sensors, they MUST communicate on
three different channels.
• Other vessels near your use the same PI54 system (or a
similar), and they have one or more of their sensors set up to
the same communication channels as you have. This will
create interference, as you will “read” each others sensors.
• If your sensors are set up to use communication channels too
close to each other (for example, you have chosen channels
4, 5 and 6), this will limit the vessel’s speed. T he reason for
this is the doppler effect. If the speed is too high, the doppler
will cause the transmission fr equencies to change so much
that they overlap, and this will create interference. The PI54
will provide a warning if this is about to happen! You must
then either change to other communication channels further
apart, or r educe the maximum shooting speed.
• If you operate at the maximum range of the sensors, you may
be able to increase this range slightly if you use lower
communication channels. This is because the lower
communication channels user lower transmission
frequencies.