Snap Manual
1
SNAP MANUAL
Multi-card Long-Term Underwater Acoustic Recorder
Manual v1.0
Updated 13 June 2022 www.loggerhead.com
Page 1: ...Snap Manual 1 SNAP MANUAL Multi card Long Term Underwater Acoustic Recorder Manual v1 0 Updated 13 June 2022 www loggerhead com ...
Page 2: ...etup and deploy the Snap HTI 96 min Hydrophone 3 Alkaline D Cell Bateries 1 microSD cards formatted as FAT32 Software Snap stores data directly as audio wav files Any audio analysis software Adobe Audition Cornell Raven MATLAB R Python will work with these files For noise analysis the open source Manta software is designed to run with audio files collected by the Snap https bitbucket org CLO BRP m...
Page 3: ... 2 O rings Clean and grease o rings with silicone grease and insert into the groove on the ring The o rings 228 are McMaster part number https www mcmaster com 9452K66 Step 3 Turn on power switch The Snap has battery holders for 1 set of 3 D cell alkaline batteries Do not use NiMH or Lithium batteries Alkaline batteries can be packed in luggage on an airplane and can be bought in most field locati...
Page 4: ... frequency you want to record E g 48 kHz sampling frequency can record sounds up to 24 kHz Step 5 Start Recording Hold down the UP and DN buttons at the same time to start recording If this is not done the recorder will automatically start after 15 minutes A red LED in the end of the hydrophone will illuminate while a recording is in process if you are using the HTI 96 min Step 6 Close lid Snap th...
Page 5: ...s of the lip and pull out the Snap board If a recording is still happening red hydrophone LED on and green LED on board flashing hold down the UP DN buttons at the same time This will properly close the file before stopping recording Then switch off the board and remove the microSD card ...
Page 6: ...ard re formatting New 32 GB cards will come formatted as FAT32 you don t need to do anything EaseUS Partition Master Instructions https www easeus com download epmf download html 1 Click on the drive with the microSD card 2 Click Format button the right 3 In pop up dialog box Change cluster size to 64 KB Click OK 4 On top of screen click on Execute 1 Operation ...
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Page 8: ...onal 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 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 noi...
Page 9: ...drophone 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 ...
