4
ATT/IF button
Click this button to turn ON or OFF the
ATT(
receiver attenuation)
.
The
S
in the LCD display will change to
A
indicating the ATT is
ON.
Pressing the
ATT/IF
for 2 seconds will cause the receiver to
enter the IF band width change mode.
While in the IF bandwidth change mode, Click ATT/IF
to change the bandwidth. When completed, Press the
ATT/IF
for 2 seconds to exit. (If no button is pressed within
several seconds it will be an automatic exit.)
Change the Frequency Tuning Steps
While in receiving mode, pressing the tuning knob lightly
will change the tuning step to either 100Hz or 1KHz(in RIT
mode, 10Hz and 100Hz). As the change is made, the position
in the display that the step is being changed to will
momentarily display an underscore (
_
) for verification of the
change.
If you press the tuning knob for 2 seconds, the tuning
step will be 100KHz.(This operation can not be used in the RIT
mode)
Frequency locking function
To
lock or unlock the tuning knob
simultaneously press both
V/M/SAV
and the
RIT/MOD
for about 1 second. In lock mode the
symbol (
#
) will be displayed next to the frequency. In this mode,
Rotation the tuning knob will not change the frequency.
Summary of Contents for R4020
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