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N o .
Control
Function
t 6
LOCK switch
Used for locking the set frequency electrically so as not to
be changed by careless misoperation. By setting this switch
to the locked condition (pressed), the receiving frequency
will not be changed even though operating the TUNE knob
@ and UP/DOWN switch @ . f'or releasing the locked
condition, press this switch again.
l 1
AF GAIN knob
This is a volume adjustment knob for the speaker or
headphones. And this knob does not af'fect the level of the
line output (600O balanced) on the rear panel of the
receiver.
t 8
Attenuator switch
Used for selecting the ON or OFF condition of the 20 dB
HF attenuator for the receiver input. Set this switch to ON
for the better reception when the signal is received at the
near distance and the desired signal is interfered due to the
strong neighboring signals etc. But usually, set this switch
to the OFF position.
t 9
AGC switch
Used for selecting the ON or OFF condition of the AGC
circuit and selecting the discharging time constant.
The FAST position is for the reception of DSB signals,
and the SLOIV position is normally f or the reception of
CW or SSB signal affected by fading. By setting this switch
to OFF, the AGC circuit remains inoperative and signals
are saturated. Thus, control the gain by the RF GAIN
knob @ for the best receiving condition.
20
BC BAND
REJECTOR
Set this switch to ON for the better reception when the
cross-modulation or intermodulation due to the strong
radio wave of the broadcasting wave (525 to 1605 kHz)
interferes the MHF reception.
2 l
POWER switch
Used for turning ON or OFF the power. Also used for
selecting AC or DC power supply.
4 . 2 O P E R A T I N G P R O C E D U R E S
Before turning on the power switch, check the following items.
( I ) Power voltage check
The label, which shows the nominal power voltage, is placed above the power connector
located on the rear panel of the receiver. Check that the power voltage to be used is
within the range of the nominal value !lO%.
(2) Antenna system check
Check that each connecting part of the antenna cable to be connected to this receiver is
firmly connected. When the antenna coupler and antenna changer are used, check that
they are correctly set
* - t 2 -
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