Table of Contents
Advertisement
AUTOMATIC SHUTDOWN: Transmitter shuts down with loss of tone or
continuous tone, or extreme distortion due to a change in load, or
when power falls below a preset value.
AUDIO LINE INPUT: Balanced, 600 ohms ±20%, -17 dBm nominal. Will
accept -28 dBm to +5 dBm. (0 dBm=l mW into 600 ohms). Audio line
direct current shall not exceed 3 mA DC.
TRANSMITTER AUDIO LINE CONTROL CIRCUITS:
Squ@ich
Allows line input signals to pass through to the modulator
when the line signals exceed the squelch trip point.
Controls code signal modulation level (to 95% with line
signal absent, to 20% with line signal present). Operates
with fast attack, slow decay characteristics.
Squelch
level adjustable from -30 dBm to +5 dBm.
AGC
Maintains a constant average modulation level for line
input signals. At maximum sensitivity, AGC stage will
accept input levels of -28 dBm to +5 dBm without modulation
percent change. Attack and decay times adjusted for voice
type line signals.
Over Modulation Control
Limits modulation of carrier to 100% on severe overload
of AGC circuits. Allows clipping of voice signals to
increase average modulation percentage.
INPUT POWER: 115/230 VAC ±20%, 50/60 Hz, 420 VA maximum, or 48
VDC, 5.5 amperes maximum.
EMERGENCY BATTERY SUPPLY (Optional): When emergency batteries are
used, the optional Battery Standby System automatically keeps the
batteries charged when AC power is available, and automatically
switches to batteries on loss of AC power. Four 105 AH deep cycle
(marine type) 12V batteries, such as Gould AP-105, will operate the
transmitter for approximately 13 hours.
INSTALLATION REQUIREMENTS:
The transmitter is supplied in a
weatherproof enclosure. The transmitter and the antenna coupler
are suitable for pole mounting out-of-doors.
4
Southern Avionics
SS-800AVS
Company
Advertisement
Table of Contents
