Selecting Normal mode
Use Tx Power to increase or decrease the output power. The output power is selected from predefined steps.
Context
The Operation function controls the operating mode of the ME70 system. You can set it to Normal, Replay or Inactive. Normal mode allows the ME70 system to transmit ("ping") through the water, and to receive the echoes.
The transmission ("pinging") from the ME70 can be turned on or off. The Ping function enables or disables the ME70 transmissions into the water. Once pinging is On, use Ping Mode to choose how often the ME70 shall transmit. Use the Ping Interval function to choose the time (in milliseconds) between each transmission ("ping") when the Transmission Mode is set to Interval.
Procedure
1 Open the Operation menu.
2 Set Operation to Normal.
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The ME70 is now ready for use.
3 Set Ping to On.
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The Ping function enables or disables the ME70 transmissions into the water. Once pinging is On, use Ping Mode to choose how often the ME70 shall transmit. Use the Ping Interval function to choose the time (in milliseconds) between each transmission ("ping") when the Ping Mode is set to Interval.
4 Set Ping Mode to Interval.
5 Select either side of the button to choose a value.
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Specify the ping rate that has been defined for the survey.
Result
The ME70 system is now transmitting acoustic pulses ("pinging") into the water.
Further requirements
When the ME70 starts, it is very important that it detects the bottom correctly. In most cases this will take place automatically. However, we have experienced that large schools of fish or difficult bottom conditions have deceived the ME70 to display the wrong depth. In these cases the sounder may display the bottom at 0.0 metres at the top of the fish school. In order to aid the ME70 to locate the correct depth, you must adjust to bottom maximum and minimum ranges according to the actual bottom depth.