Realistic TRC-422A - Transmitting and Emergency Modes

When properly set, SQUELCH will keep the receiver ‘‘dead”’ until a signal
comes in on that channel. Do not set SQUELCH too high, or weak
signals will not be able to ‘‘open”’ the Squelch circuit. To receive the very
weak signals, it is best to leave SQUELCH set to the minimum position
(maximum counterclockwise).
The SQUELCH circuit in your Transceiver is a special advanced
development. It uses two extra transistors to accomplish a hysteresis
action. The result is that when you set SQUELCH for a precise signal
level, if that signal level fades (increases or decreases in strength), >
Squelch circuit will follow this change. With conventional Squelc
Circuits often a signal which changes strength gets ‘‘chopped” by
Squelch and you lose a portion of the message; with hysteresis Squelch
you get it all.
TO TRANSMIT
1. Select the desired channel of
operation.
2. Connect the Mic plug to Mic jack.
3. Press the push-to-talk button on
the Microphone and hold it at an
angle about 2—3” (56cm — 7.5cm)
from your mouth and speak in a
normal voice.
4. To Receive, release the push-to-
talk button.
Be sure the Mic plug is firmly connected to the jack: if the connector
starts to loosen up, you may end up with squeal, feedback and many
other unusual problems.
NOTE: Shouting into the Mic will not increase your power or signal. An
internal circuit automatically sets the mic signal for maximum
modulation, so there is no need for loud speech — as a matter of
fact, shouting may result in distortion (speech distortion going
into the mic).
Emergency Switch
In an emergency you don’t want to spend time turning the Channel
Selector until you reach the desired channel. So we've incorporated a
special switch that puts you on Channel 9 or 19 instantly. Channel 9 has
been set aside by the FCC for emergency communications only; Channel
19 is commonly used by truckers and motorists for conveying information
on road and traffic conditions, etc.
Set the Emergency Switch to 9 (up) for Channel 9, and to 19 (down) for
Channel 19. Move switch to center position to return to previously
selected channel.
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