Magnum AlphaForce Operating Manual - page 8
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FRONT PANEL CONTROLS
1.
OFF / VOLUME CONTROLS
OFF: Turns the power to the radio on and off.
VOLUME: Adjusts the AF gain, or volume of the re-
ceived audio. Turn clockwise to increase and counter-
clockwise to decrease.
2.
SQUELCH CONTROL
Used to eliminate background or “white” noise when
monitoring strong signals. Also used to activate SCAN
feature (refer to 20). To properly adjust the squelch
circuit, start rotating the control slowly clockwise until
the received white noise disappears.
3.
MICROPHONE GAIN CONTROL
Increases or decreases the energy developed in the
microphone amplifier circuit. The gain increases as the
control is rotated clockwise.
For optimum setting, press the push-to-talk (PTT)
switch on the microphone. While speaking in a con-
stant tone (such as saying the word, “four-r-r-r-r”) ad-
just the mic gain control until the LCD peak reading RF
meter (refer to 24) reads +30. Next, rotate the control
counterclockwise until the +30 segment of the display
starts to flicker. The microphone gain should now be
set to maximum modulation without distortion.
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4.
RF GAIN CONTROL
Adjusts the receiver sensitivity to both signals and back-
ground noise. This affects the distance at which a sig-
nal can be detected. Turning the control counterclock-
wise reduces the receiver sensitivity. This is particu-
larly useful in areas where large volumes of traffic (sig-
nals) are present. The S/RF meter (refer to 13) indi-
cates the received signal’s strength.
5.
RB / S/RF / CAL / SWR CONTROL
ROGER BEEP: RB position activates the end of trans-
mission, or roger beep, tone. When activated a 1 kHz
tone will automatically transmit upon release of the PTT
switch. This notifies contacts that your transmission
has ended and you are ready to receive their signal. To
turn off the roger beep, put the switch in the S/RF posi-
tion. NOTE: In the RB position, the meter (refer to 13)
measures S/RF.
SIGNAL STRENGTH / RF METER: S/RF position ac-
tivates the meter (see 13) to measure receive signal
strength and transmitter RF output power.
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