5-5 1/4 function
When the 1/4 function is ON, one complete rotation of
the tuning dial changes the frequency by 1.25 kHz
(normally one rotation changes the frequency by 5
kHz). This is convenient when critical setting is re-
quired and is only available in CW and RTTY modes.
➀ Push [CW/RTTY] to select CW or RTTY mode.
➁ While menu set 1 is selected, push [F3](1/4) to
toggle the 1/4 function ON and OFF.
• When the function is ON, “1/4” appears in the function
display.
• This can be set independently for CW and RTTY modes.
• When the TS function is turned ON, the TS function has
priority.
5-6 NB function
The noise blanker reduces pulse-type noise such as
that generated by automobile ignition systems. This
function is not effective for AM and FM, or non pulse-
type noise.
➥ Push [NB] to toggle the noise blanker function ON
and OFF.
• When the noise blanker function is turned ON in AM
mode and a strong signal is received, audio may distort.
In this case turn the function OFF.
5-4 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.
➀ While menu set 1 is displayed, push [F1](AGC) one
or more times to select AGC fast or AGC slow.
• The corresponding indicator appears in the display.
• AGC slow cannot be selected in FM mode.
➁ Push [F1](AGC) for 2 sec. to turn the AGC function
OFF.
• AGC should normally be set to AGC fast for CW and
RTTY operation and to AGC slow for SSB and AM oper-
ation.
• Turn AGC OFF when receiving a very weak signal near a
strong signal.
☞ NOTE: When the AGC function is turned OFF, the
S-meter does not function.
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