TRC-424 4-Watt Solid-State
Transceiver (210-1522) Controls and Functions Faxback Doc. # 48945
CONTROLS AND THEIR FUNCTIONS
This short description of the function of each control and jack supplies
background information for proper operation.
For actual operating instructions, refer to USING YOUR TRANSCEIVER.
VOLUME with ON/OFF switch - turn clockwise to apply power to the unit
and then adjust for the desired level of
sound from the speaker.
SQUELCH - sets the level of the incoming Squelch
circuitry to cut out the background noise
when no signal is being received. When
properly set, it allows signals to come
through, but cuts off the receiver sound when
no signal is being received, thus eliminating
annoying background/atmospheric noise during
standby and monitoring conditions.
If you set SQUELCH too 'high' (rotate too far
in clockwise direction), you may miss some of
the weaker signals. Operating conditions
will determine the best setting.
This control also permits you to cut out
incoming CB calls while using PA function.
To do so, rotate SQUELCH maximum
counterclockwise till it clicks to CB OUT
position.
RF GAIN - varies the sensitivity of the RF
amplifier stage of the Receiver circuitry.
For normal operation, set RF GAIN to maximum
and adjust VOLUME for a suitable listening
level. Under high-signal conditions, you may
want to turn RF GAIN down a little and raise
VOLUME as required.
Channel Selector - selects one of the 40 CB channels as
indicated in the Channel Indicator window.
PA push-button - in the 'out' position (button out), your
Transceiver operates in the normal manner.
To use the Public Address function, press
this button in. This disables the
transmitter and lets you use the power
amplifier circuitry as a 4-5 watt Public
Address amplifier - but, you must have an
external speaker connected to the PA SP jack
on the back.
If you leave SQUELCH in the maximum
counterclockwise position - but not switched
to CB OUT position - you can continue to
monitor CB signals on the channel you have
selected. If you do not want this constant
background noise, set SQUELCH to CB OUT
position.
BLANKER push-button - activates a 'blanker type' automatic noise
limiter circuitry. When impulse-type noise
is a problem, press BLANKER (button in); it
will aid in reducing noise interference.
When in the 'out' position (button out) the
noise blanker is out of the circuit.
DELTA TUNE - functions as a 'fine tuning' control. If you
receive a signal that is not clear because it
is 'off-frequency', set to '+' or '-' as
required to achieve best signal quality. It
is also helpful to reduce adjacent channel
interference caused by another station on an
adjacent channel operating off frequency.
Use the position which is best signal and/or
least adjacent channel interference.
Channel Indicator - shows the selected channel in a large,
easy-to-read 7-segment LED display.
RF/S Meter - when receiving, indicates the relative
strength of the incoming signal on RX SIGNAL
scale. When you transmit, it shows the
relative RF power output from your
transceiver (it is not a precisely calibrated
watt-meter - it provides only a relative
indication of RF output power.
A Modulation Indication Lamp is built into
the meter; as you talk into the Microphone,
the meter will fluctuate in brilliant red as
your talk power increases.
Universal Mounting Bracket - is designed for easy installation in almost
any situation - vehicle, boat or base station.
It provides for quick removal if you want to
relocate the unit or remove for security.
Microphone - this high-quality dynamic microphone must be
connected to the jack on the side (be sure
the plug is pressed firmly and securely into
the jack). To Transmit, press the button on
the microphone. To Receive, release the
button.
When transmitting (or using the PA function),
hold the microphone at an angle 2" (5 cm) or
3" (7.5cm) from your mouth and speak clearly,
in a normal voice.
REAR PANEL
ANTenna Coax Connector - connect your CB antenna to this (SO-239 type,
accepts PL-259 connectors).
P.A. Speaker Jack - to use the Public Address function, you must
connect an external speaker to this jack. We
recommend RadioShack catalog number 40-1236,
a weatherized PA speaker; to make the
connection, use a miniature-type phone plug
such as catalog number 274-288.
EXTernal SPeaker Jack - if you want to use an external speaker in
conjunction with the CB operation of your
Transceiver, plug it into this jack. Use a
standard 8 ohm type, either the PA type noted
above or other high-quality communications-
type. We suggest RadioShack's 21-549. Use a
standard miniature phone plug such as
suggested above. When a plug is inserted
into this jack, the builtin speaker is
automatically disconnected.
Power Cable with - connect these cables to a source of 12-16
In-Line Fuse volts DC. The Red wire with the in-line fuse
must be connected to the '+' side and the
Brown wire to the '-' side.
(wr 08/04/98)
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