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LS1/LS2 Manual 

 5 

 

 

setup.txt Commands 

All commands are optional. Default column lists values if no setting in setup.txt 
file. Record duration and record interval can be set through the button interface. 

 

Command 

Function 

Default 

Example 

Setup.txt example 

RD 

Record duration (s) 

Last used 

Record 600 
second files 

 

RD 600

 

RI 

Record interval (s) 

Last used 

Sleep 240 
seconds between 
files 
 

RI 240

 

SG 

Hydrophone system 
gain. See table for dB 
gains associated with 
different settings. 

4 

Set gain to 
setting ‘10’, 
which 
corresponds to 
11.1 dB gain 

SG 10

 

ND 

Remove DC from 
audio. Turning on 
increases electrical 
noise 

Off 

Turn on feature 
to remove DC 
from audio 

ND

 

 
 

 

Summary of Contents for LS1

Page 1: ...LS1 LS2 Manual 1 LS1 LS2 MANUAL Long Term Underwater Acoustic Recorder Manual v2 0 Updated 19 March 2021 www loggerhead com ...

Page 2: ...signed to run through a simple button interface with a display No PC is needed to setup and deploy the LS1 LS2 HTI 96 min hydrophone Adjustable sample rate 1 TB microSD formatted as exFat Software LS1 LS2 store data directly as audio wav files Any audio analysis software Adobe Audition Cornell Raven MATLAB R Python will work with these files ...

Page 3: ...2 of the LS1 LS2 Use buttons to change settings UP DN Used to move through menu settings and make changes Enter Used to change values Display Setting Description Start Press Enter to Start Record Record duration in seconds Sleep Sleep duration in seconds This is the time from the END of one recording to the START of the next recording Continuous Recording Sleep 0 seconds For continuous recording t...

Page 4: ...o start recording If this is not done the recorder will automatically start after 10 minutes Step 6 Close lid The radial o ring is the main sealing o ring so there is no need to make the lid more than hand tight Stopping Recording If a recording is in process after recovery you can press the UP DN buttons at the same time to close the file File Names Example 20210319T163400_2614231252441225_2 0dB_...

Page 5: ...ault Example Setup txt example RD Record duration s Last used Record 600 second files RD 600 RI Record interval s Last used Sleep 240 seconds between files RI 240 SG Hydrophone system gain See table for dB gains associated with different settings 4 Set gain to setting 10 which corresponds to 11 1 dB gain SG 10 ND Remove DC from audio Turning on increases electrical noise Off Turn on feature to rem...

Page 6: ...s battery holders for 8 sets of D cell batteries 24 batteries total Always use new batteries of the same brand and tape them into place The display will provide estimated run time based on the number of battery packs that are filled LS1 1 4 battery packs LS1X 1 8 battery packs and the memory available in the microSD card ...

Page 7: ... 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 6...

Page 8: ... be used to relieve the pressure by turning it slowly until you start hearing air come out Once air starts coming out stop unscrewing and wait until air stops coming out The vent plug is designed to stay in the endcap and safely vent air through holes machined in the plug Once the internal pressure has equalized you may remove the top lid with the hydrophone There is no need to fully remove the ve...

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