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Important: The explanations herein are based on manufacturer's default
setting.
Switching The Power On/Off
Power On
Press
key to turn on. Appears "ALINCO DR-
638" then displays current frequency or channel.
Power Off
Press
key for over 0.5 Second to turn off.
Adjusting The Volume
Rotate the [VOL] knob of selected band clockwise
to increase the audio level, counterclockwise to
decrease.
Rotate the SQL ring counterclockwise to hear the white noise to set the
audio level properly.
SQUELCH LEVEL SETTING
Rotate the [SQL] ring of selected band clockwise
to increase the squelch level, counterclockwise to
decrease.
A noise is heard at the minimum setting.
Squelch is to cut the white-noise in stand-by state.
Setting it too high may risk missing weaker signals but lower setting
may open squelch often hearing more noise. You should set the levels
of both MAIN and SUB bands before start operating.
Switch between VFO and MEMORY MODE
In standby, press
or
key to switch between VFO(Frequency)
and Memory mode. When in memory mode,
the memory channel number appears on the
left side of memory frequency.
Setting Frequency
In VFO mode, turn the dial clockwise to increase
frequency; Counterclockwise to decrease. Every
click will increase or decrease frequency by one
channel-step. To select MAIN and SUB band,
POWER
press the dial. Press
or [UP/DOWN] keys to change the frequency by
1MHz step.
The microphone [UP/DOWN] key also able to adjust frequency.
Press [UP/DOWN] key will increase(decrease) the frequency by one
step size. Hold [UP/DOWN] key will adjust the frequency continuously.
Input Frequency THROUGH Microphone number key
In VFO mode, you can input the frequency by the numerical keys.
Out-of-the-band frequnecies are automatically rejected.
For example, to input 145.320MHz, press 1,4,5,3,2,0 sucsessively.
When completed, a decimal point appears at the MHz order.
When the Band lockout function is on, the operating ranges will be
limited to the 136-174Mhz and 400-523MHz in the SUB band only.
Setting CHANNEL
In memory mode, you can select the frequency by turning the dial.
Turn clockwise to increase, counterclockwise to decrease the channel
numbers. To switch the MAIN/SUB band, press the dial.
While a memory channel is shown in SUB band, [ ] icon appears.
Pressing [UP/DOWN] keys on microphone also sets channels.
Basic Operations
key then turn the dial
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