LS1/LS2 Manual
7
HTI Hydrophone and Recording Gain
The LS1/LS2 uses a hydrophone manufactured by High-Tech Inc. The sensitivity
of the hydrophone will be on a specification sheet included with the shipment
(typically -170 dBV/uPa or -180 dBV/uPa).
The hydrophone has a red LED in the end to indicate when it is getting power.
This will only be turned on during startup and recording. The hydrophone red
LED will be off when sleeping.
The A/D converter gain can be changed through the setup.txt file. The default is
setting 4. The setting can be changed with SG command in setup.txt. The actual
setting that was used is stored to the log.txt file.
Setting
Clip Level (peak-peak) Clip Level (peak)
Gain (dB)
0
3.12
1.56
-3.9
1
2.63
1.315
-2.4
2
2.22
1.11
-0.9
3
1.87
0.935
0.6
4
1.58
0.79
2.0
5
1.33
0.665
3.5
6
1.11
0.555
5.1
7
0.94
0.47
6.6
8
0.79
0.395
8.1
9
0.67
0.335
9.5
10
0.56
0.28
11.1
11
0.48
0.24
12.4
12
0.4
0.2
14.0
13
0.34
0.17
15.4
14
0.29
0.145
16.8
15
0.24
0.12
18.4