Trawl Explorer | V5 | Sensor Configuration
• Detection between 20 cm and 2 m: enter 0.1 ms
• Detection between 50 cm and 160 m (V2: up to 80 m): enter 0.4 ms .
Important:
Ping length is an important setting for the calibration of the
sensor. If you change ping length on a sensor calibrated for target strength, it will have to
be returned to a Marport sales' office for target strength calibration.
Note:
The maximum detection depth depends on ping frequency and type of bottom. The
lower the ping frequency is, the longer the detection depth is.
6.
From
Ping Up/Down Frequency
, enter frequencies for up and down soundings. You can choose
the same frequency for both because they do not transmit at the same time.
Important:
Frequency needs to be between 120-210 kHz.
Important:
Ping frequency is an important setting for the calibration of the
sensor. If you change ping frequency on a sensor calibrated for target strength, it will
have to be returned to a Marport sales' office for target strength calibration.
Target Strength
Procedure
1.
For V3 version of sensors, Down and Up
channel minimum TS
helps you detecting
targets on the echogram. You can put -79 dB if you want to detect small targets. Otherwise,
leave the default settings at -73 dB.
Important:
This parameter must be the same in the sensor settings in Scala/Scala2.
2.
In Down and Up
TVG Mode
, select the appropriate TVG (Time Variable Gain) mode. See
on page 22 for more information.
For V3 version of sensors:
• 20 log: focus on bottom or school of fish .
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