Magnum S-3 Owner's Manual - page 6
AMT: All Mode Talk Back. AMT, a Magnum
exclusive, is an independent talk back monitor. The
AMT functions in all modes and allows the operator
to monitor the transmitted audio of the Magnum S-3.
To increase the volume of the talk back rotate the
control clockwise. To decrease rotate
counterclockwise. To turn off the talk back rotate the
control completely counterclockwise.
7. FREQUENCY: Rotate clockwise or counterclockwise
to select the desired frequency.
8. S/RF
METER:
Indicates receive signal strength and
RF output power. The top bar on the meter indicates
RF output power. The bottom bar indicates receive
signal strength.
9. AM - FM - PA: Selects the mode of operation - AM,
FM or PA (public address).
PA: Public Address. The PA feature allows the radio
operator to use the Magnum S-3 as a public address
amplifier. The PA feature requires the use of an 8-
ohm, 4 watt public address speaker or horn. PA
horns may be purchased from most electronic or
automotive shops. The horn is connected to the PA
jack on the rear panel of the Magnum S-3.
To operate the PA feature, switch the Magnum S-3
to the PA mode, depress the PTT and speak in a
normal voice into the microphone - just as though
you are transmitting. Your audio will be sent to the
PA horn and not transmitted over the air.
10. TOP GUN MODULATOR - OFF: Modulator on/off
switch. To activate the Top Gun modulator circuit
move the switch to the up position. To bypass the
modulator circuit move the switch to the OFF
position.
The modulator circuit, created by TOP GUN
TECHNOLOGIES (www.TopGunTec.com), is a
Magnum radio exclusive. Activating the modulator
allows the radio operator to set the AM power output
level to as little as 1 watt carrier and still modulate
(swing) to 50 watts – without adding distortion! The
modulator maximizes efficiency and makes the
Magnum S-3 a powerhouse!
Your Magnum S-3 also features the TOP GUN
COMPRESSOR circuit – another Magnum
exclusive! The compressor circuit is always on and
requires no adjusting or control. The compressor
continually shapes the transmitted audio for
maximum punch through crowded conditions.
11. NB / ANL - OFF: Noise Blanker and Automatic
Noise Limiter on/off switch. To activate the noise
blanker and automatic noise limiter move the switch
to the NB / ANL position. To deactivate, select the
OFF position.
NOTE: The noise blanker is effective in eliminating
pulse type interference usually associated with
automotive ignition systems.
12. +10kHz - OFF: In the +10kHz position, the
frequency is shifted up 10 kHz.
13. RX/TX/SWR: Receive, Transmit and High SWR
Warning Indicator LED. A two color LED that is
green while the receiver is active and red while the
transmitter is active.
SWR warning light illuminates when the antenna’s
standing wave ratio is over the recommended ratio -
2 to 1.
14. Channel Display: Two digit “channelized” frequency
display. See frequency chart for cross-reference of
channel.
15. Microphone Push-To-Talk Switch: Press and hold
the switch to transmit. While transmitting, speak into
the front grill of the microphone.
The RX / TX LED indicator will turn from green to
red. Release the switch to receive.
REAR PANEL
1. EXT. SP.: External Speaker Jack
An external speaker jack is located on the rear panel
of the transceiver. The Magnum S-3 is designed to
accept any standard 8-ohm external speaker for use
with two-way transceivers.
2. PA: Public Address Speaker Jack
A public address horn (speaker) jack is located on
the rear panel of the transceiver. Plug the PA horn
into the back panel and follow the instructions
included with the product.
3. DC Power Connection
The Magnum S-3 uses the standard 3-pin DC power
connector.
4. SWR Detection Circuit On / Off Switch
This switch turns the Magnum S-3’s SWR detection
circuit on or off. When turned off, the SWR warning
light on the front panel will not illuminate.