Desert Star Acoustic Release Control System, Manual

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Once you are presented with a “Noise Test Dialog” window, you will be able to see a graph
representing the noise level received by the sonar transducer underneath your vessel.
When the noise level at your deployment site is very low, the graphical representation of the noise
lever will show no noise signal at all.
When a noise signal exists, you will be able to see it in a form of a color coded bar.
The default setting for the sensitivity of a STM surface station is 120 db.
Even if no noise is detected, we recommend leaving the “Threshold Level” slider set to 120 db.
Your goal is to adjust the incoming signal strength so that the graphical representation of the noise
level does not exceed 120 decibels (db) level marked on the scale as a red line crossing the signal
bar at 120 db.
When you move the “Threshold Level”, you are changing the sensitivity of the STM surface station.
Find the “Threshold” when the color of the signal is displayed as green, transitioning into a yellow at
the red line of a 120 db.
STEP 4:
Once you found the optimal position of the slider, let go of the “Threshold Level” slider and click on a
“End Test” button.
[PICTURE]
The screenshot of the “Threshold Level” adjusted to an ideal setting.
Once you have clicked the “End Test” button, STM surface station will hold this setting in it’s
memory.
Be advised that adjusting the “Threshold Level” to the maximum setting (corresponding to a slider position all the way to the
right) will limit the range your STM surface station is capable of “hearing” sonar signals. However, it will limit interference
allowing the STM surface station to have a clear communication with the ARC unit(s).