Desert Star Acoustic Release Control System, Manual

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On a set of an Alkaline only batteries, ARC unit capable to initiate about 700 release cycles. Each
release cycle will require communication with the surface. The more time the ARC unit spends
communicating with the surface, the more energy will be depleted from the batteries.
Use the following statistics in this table to estimate the number of release cycles and associated
maximum communication time available per release cycle.
[TABLE] Show table with an estimated times. TBD
To extend the life of your batteries, be mindful of the number of communication cycles you initiate
from the surface to an ARC unit underwater. Keep the number of those communication sessions and
their duration to an absolute minimum.
With the nickel-chromium wire installed into the release assembly, new batteries connected,
O-ring rubber gasket properly loaded, and sonar transducer end-cap secured, the ARC unit is
now set and ready to communicate with the Surface Transponder Module (STM). The
following section of this manual will guide you through the STM surface station functions and
operations
5. Surface Transponder Module (STM)
The ​ Surface Transponder Module (STM) ​ (Model Number STM-3) facilitates a relay-converter
function between a software running on the PC and the submerged ARC unit. The STM surface
station receives the command sent to it from the PC and converts it into sonar acoustic signals. The
sonar acoustic signals are then sent through the water to the ARC unit under the water. The ARC
unit processes the commands it received and sends back a response. The STM surface station
receives the response in the form of an sonar acoustic vibrations, converts them back in to digital
signals and forwards them to the software running on a PC. The software displays the information
received from the ARC unit on a PC's monitor.
The STM surface station is assembled as portable unit, with controls and connections located in its
front panel.