SOUTHERN AVIONICS COMPANY
Model SA100 Dual2-2 Theory of Operation, Radiobeacon
The shutdown status led's on the front panel will indicate the following shutdown conditions; Low
Power (P), Low Tone Level (N), Continuous Tone (C), and High Reflected Power (V).
Power Supplies: Power for the transmitter can be supplied from 115/230 VAC, 24 VDC
(optional), or both with automatic change over to batteries (optional) when AC power is lost. The
AC POWER SUPPLY PWB is a conventional bridge rectifier, capacitor filtered supply. The
optional DC SUPPLY PWB is a step-up switching regulator supply. When the system uses both
AC and DC supplies, the optional batteries supply power without interruption whenever AC
power is lost.
Battery Charger (optional): The optional battery charger system automatically charges the
batteries in two modes, fast charge and float mode depending on the battery condition.
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