■ Preamp and attenuator
The preamp amplifies received signals in the re-
ceiver input (front end) circuit to improve the S/N
ratio and sensitivity. Turn this function ON when re-
ceiving weak signals.
The attenuator prevents very strong signals near the
desired frequency, such as nearby broadcast sta-
tions or very strong amateur signals, from causing
distortion of a desired signal.
➥
Push
P.AMP
ATT
momentarily to turn the preamp ON
and OFF; push and hold for 1 sec. to turn the
attenuator ON.
• “ ” appears when the preamp is ON; “ ”
appears when the 20 dB attenuator is ON.
• Only one of these functions can be activated at a time.
■ AGC function
The AGC (auto gain control) controls receiver gain to
produce a constant audio output level even when the
received signal strength is varied by fading, etc.
D AGC time constant selection
q Push
MODE
once or twice to select the desired
mode.
w Push
AGC
once or twice to select AGC fast or
AGC slow.
• “F.AGC” appears for AGC fast; no indicator for AGC
slow is selected, respectively.
e Push and hold
AGC
for 1 sec. to turn the AGC
OFF.
• “AGC-OFF” appears for AGC OFF.
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