M3 & M5 Systems | V7 | Servicing and Maintenance
Estimating the Efficiency of Hydrophones
You can use the page
Messages
to check the efficiency of the hydrophones.
1
Noise (dBv)
You will have better performance with the following levels:
• Active wideband hydrophone with high/low gain: below -100 dBV
• Active narrowband: NC-1-04 below -80 dBV / NC-1-07 below -100 dBv
• Passive hydrophone: below -110 dBV
2
SNR
• SNR is correct above 20 fro PRP sensors, above 10 for NBTE sensors.
• Below these levels, SNR is low, causing a discontinuous signal
3
Period of data
This is the interval between 2 signals that have been well received. It should
be 1 to 6 seconds for NBTE signals. For PRP signal, it should correspond to
the telegram intervals.
4
ID of the
sensor
This is the ID of the sensor transmitting data. To know the ID of a sensor,
look at the parameter page of the sensor on the receiver page.
You can use this ID to filter the messages.
5
Hydrophone
Number of the hydrophone.
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65
