Simrad ES80 Reference Manual page 322

Simrad ES80 Reference Manual
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Passive
In Passive mode, the ES80 will receive and compute the signals detected by the
transducer(s). This mode is thus useful for test purposes, and when you wish to
measure the ambient background noise in the sea. It can also be useful to run
the ES80 in Passive mode to discriminate between target echoes (present only
in Active mode) and noise (present in both Active and Passive modes).
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Test
The transmitter is passive while the receiver is active. This mode is not designed
for operational use with the ES80.
Pulse Duration
The
Pulse Duration
transmitted pulse. You can manually select a pulse duration that suits your
operation. You can also choose automatic duration.
Tip
When you select
for the current operational mode, depth and bottom conditions. For normal use,
we recommend that the pulse duration is set to Auto.
The pulse duration can be adjusted according to the current depth and what kind
of fish you are looking for. The deeper you wish to see, the longer pulse duration
should be used. Remember that in the ES80, the pulse duration and the bandwidth
are mutually dependant.
• Long pulse => lots of acoustic energy => narrow bandwidth => less sensitive
for noise from own vessel and environment
• Short pulse => less acoustic energy => wide bandwidth => more sensitive for
noise from own vessel and environment
Power
You are permitted to adjust the output power of the ES80. You can not increase
the power to beyond the transducer's capacity, but you may reduce it for better
performance in shallow water, or if you are struggling with reverberation.
The parameter in the
Power
output power measured in Watts. You can change the output power manually.
Output power is limited either to the maximum rating of the transducer, or the
maximum rating of the transmitter, whichever is the smallest. For all practical
purposes, this means that you can reduce the power output, but you can not
increase it to beyond the power rating of the transducer.
The current setting of this parameter is also shown in the
320
setting specifies the current duration ("length") of the
, the ES80 will automatically select the best pulse duration
Auto
Normal Operation
dialog box displays the transmitter's
menu.
Extras
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