18
4
USING DIFFERENT OPERATING MODES
4-1 Operating SSB
Å RECEIVING
➀
Push a band key to select the desired band.
➁ Push [SSB] to select LSB or USB.
• Below 10 MHz LSB is automatically selected; above 10
MHz USB is automatically selected.
➂ Rotate [AF] to set audio to a comfortable listening
level.
➃ Rotate the tuning dial to tune a desired signal.
• S-meter indicates received signal strength.
✔Convenient functions for receive
q Preamp and attenuator (p. 38) The preamp amplifies received signals in the front end
circuit to improve the S/N ration and sensitivity.The at-
tenuator prevents a desired signal from distorting
when very strong signals are near the desired fre-
quency or when very strong electric fields, such as
from a broadcasting station, are near you.
w Noise blanker (p. 39) The noise blanker is used to reduce pulse-type noise
caused by vehicle ignition systems and key clicks from
strong CW signals on nearby frequencies.
e Noise reduction (p. 40) The noise reduction function reduces noise compo-
nents and picks out desired signals which are buried
in noise. This function digitally transposes receive
audio components to produce desired AF frequency
characteristics at the IF stage.
r Auto notch filter (p. 40) The auto notch function automatically attenuates more
than 3 beat tones, tuning signals, etc., even if they are
moving.
t Twin PBT (passband tuning) (p. 41) The PBT function electronically narrows the receiver’s
IF passband widths to reduce interference. Moving
both [TWIN PBT] controls to the same position shifts
the IF.
y AGC (auto gain control) (p. 39) The AGC controls receiver gain to produce a constant
audio output level even when the received signal
strength is varied by fading, etc.
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