Loggerhead Remora User manual

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Remora Acoustic Recorder
www.loggerhead.com
Updated 30 January 2015

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Part I: Initial Setup
IMPORTANT: Install software drivers BEFORE connecting to
USB.
1) Install Sound Trap Host Software from CD or download from
www.loggerhead.com
Currently only Windows 7 is supported Windows 8 will be in future versions
Follow prompts and ignore warnings regarding ‘unverified publisher’or
‘unsigned drivers.
2) Launch Sound Trap Host Software
3) Use provided micro USB cable to connect the recorder to your computer. The
underwater connector pulls straight off. DO NOT TWIST CONNECTOR.

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5) The drivers will take a few minutes to install. Once complete the recorder will
appear in the left hand window under “Device List.”
NOTE: Occasionally it will require several moments for the computer to
recognize the board. It also may take a more than one insertion of the
USB plug before it recognizes the board. If this continues to be an
issue follow the steps included at the end for reset- ting the USB hub in
Windows 7.
6) Select the device by clicking on its label under “Device List”.
7) Click the "Services" tab on the top center of the status screen.
8) Click “Update Application Firmware.” Once complete, you can click “Get Firmware
version" to check version.

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9) Click “Sync SuDAR’s Clock”to sync the internal clock to that of your computer.

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Part II. Setting up a Recording Deployment
Recording State
From this section you select how the recorder will start: either when disconnected from
the USB or via the remote control. There is no salt water or depth detection for the
DSG-ST Ocean.
Recording Schedule
Record Continuously: Will record continuously when box checked. If not checked, the
record interval settings will be used.
Audio Options
Sampling Mode: Only Wave mode is enabled.
Sample Rate (kHz): Select one of the sample rates. You can record sound frequencies
up to half of the sample rate.
X3: Check to enable lossless data compression. This is a good idea for deployments
that will use a lot of memory.
Gain:

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Low: 21 dB gain (~180 dB re 1uPa clip level)
High: 33 dB gain (~168 dB re 1uPa clip level)
High setting is recommended setting unless you will be in a loud environment.
The hydrophone shipped with the DSG-ST has a typical sensitivity of -201 dBV/uPa.
Battery Charge and Deploy
The remora's lithium battery is recharged when connected to the PC. The status of the
charge is indicated in the soundtrap software.
When done with settings and fully charged click the ‘Deploy” button at the bottom of
the screen.
Remove microUSB cable.
Insert dummy plug.
Remora ready for deployment.

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Part III. Starting Recording
1) Aim the remote at the side of the sandwiched
recorder boards on the same side as the USB
connector and Press the “Start” button.
A faint red and green light will flash settling to an
intermittently blinking green light.
Note: One remote can trigger multiple instruments if they are within the range of
the remote.
The remora can also be started manually or with a start time
delay from the software.

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Part IV. Data Download and Charging
1) Aim the included remote at the side of the
sandwiched recorder boards on the same side as the
USB connector. and Press the “Stop” button.
2) Connect the remora board to the PC with the
microUSB cable.
4) Once selected, the recorder will open to the
“Retrieve” tab and download the recording directory.
Select the recording(s) that you wish to download and
click, “Download”.
Clicking “Open Save Folder” button will show where
the individual recording folders are saved on your
computer. These will include metadata files and a
.wav file that can be used in the audio processing
software of your choice.

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5) When files are downloaded, the card can be wiped by clicking “Delete All.”
The entire card is deleted, so this operation may take a few minutes for a large card.

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Calibration
There are two aspects to calibration: the hydrophone and the remora gain. The system
gain is calculated as Recorder Gain + Hydrophone Sensitivity.
Typical hydrophone sensitivities are -211 dBV/uPa.
Loggerhead can perform a reference calibration if required.
The recorder has two gain settings:
Low: 21 dB gain (~190 dB re 1uPa clip level)
High: 33 dB gain (~178 dB re 1uPa clip level)
In most cases the high gain setting is desirable.
Internal Calibration Signal
Each recording starts by playing internal electrical calibration tones.
These signals are 30 uV RMS in amplitude, and can be used to monitor the electrical
calibration of the recorder.