Microphone input impedance is 150 ohms.
Audio input (minimum) is 1.4 millivolts normal and 0.4 millivolts for
Squelch tone signal of 150 Hertz (Hz) is a part of all transmissions,
except when FCTN is set to SQ OFF..
Radio frequency (RF) signal sensitivity is 0.35 microvolt
Audio output impedance is 600 ohms (with handset at AUD/DATA or
Receiver responds to 150 Hz tone with FCTN switch set to squelch on
(SQ ON) or load (LD) when operating in SC mode.
Manpack receiver power draw is 225 milliamperes. Vehicular receivers
draw: 0.762 amp for short range radio; 1.094 amp for short range/long
range radio; 0.942 amp for long range radio, and 1.524 amp for long
range/long range radio.
2.1d. RT Model Differences (Distinguishing Features)*
Control knobs are affixed with side- positioned Allen screws
RT cover is affixed with slot-headed screws.
Last two digits of net ID may be changed by operator.
RT Mode switch is set to FH-M position to change net ID.
Sync time is loaded into RT manually via the keypad or by
electronic remote fill (ERF).
Running self-test with COMSEC in PT results in display message
of " AIL 5." (Changing to CT clears message.)
RT will accept ERF if sync time is less than +/- one hour different
from net sync time.
Figure 2-2. RT-1523 Features