SOUTHERN AVIONICS COMPANY
Model SA100 Dual1-10 Introduction
CIRCUIT PROTECTION: AC line fuse. The Modem Control link is transformer isolated by signal
transformer meeting MIL-T-27D specifications and 1000 V RMS insulation test voltage. Logic line
inputs are isolated by series impedances and diode clamps.
WORKING CONDITIONS: Continuous unattended operation in the following environment:
ambient temperature -50C to 70C, relative humidity 0 to 100% without condensing moisture.
INSTALLATION REQUIREMENTS: The REMOTE RADIOBEACON CONTROL PANEL, is
designed for indoor mounting in a standard 19 inch cabinet. Panel height is 7 inches, required
panel depth is 5 inches.
1.4.3 Control Link Specifications
TYPE: Full duplex, balanced, 2 wire, AUDIO ONLY.
INPUT TO LINE FROM LOCAL OR REMOTE RADIOBEACON CONTROL PANEL: Balanced,
two wire, 600 ohm, 0.18 VRMS average signal level, frequency 1070-2025 Hz.
OUTPUT SIGNAL FROM LINE TO LOCAL OR REMOTE RADIOBEACON CONTROL PANEL
WITH LINE TERMINATED TO PANELS: 40 mV RMS minimum. DC line current shall not exceed
3 mA. NOTE: Measurement made with panel power OFF at end to be measured, to disable
modem carrier.
LINE IMPEDANCE: 600 ohm, balanced, (300 ohm minimum, 900 ohm maximum).
Notice If modem is not used, serial data link wire will be 2 conductor 22
AWG shielded.
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