Operation Manual

4
RECEIVING AND TRANSMITTING
4-9
Noise Reduction
The Noise Reduction function reduces random noise
components and enhances desired signals that are
buried in noise. The Noise Reduction function uses
the DSP circuit.
Push
NR
to turn the Noise Reduction function ON or
OFF.
Displayed
D Adjusting the Noise Reduction level
Adjust the Noise Reduction level to where noise is
reduced and the received signal is not distorted.
1. Hold down
NR
for 1 second.
• Turns ON the Noise Reduction function and opens the
NR menu.
2. Adjust the Noise Reduction level to between 0
and 15.
L Adjust to a higher level to increase the reduction
level, and a lower level to decrease it.
Rotate
Push
Noise Reduction OFF
NR level 0
Noise Reduction ON
NR level 4
Noise components Desired signal (CW)
Notch Filter
The IC-7300 has Auto Notch and Manual Notch
functions.
Auto Notch: Used in the SSB, AM and FM modes.
Manual Notch: Used in the SSB, CW, RTTY and AM
modes.
D Auto Notch function
Auto Notch automatically lters out beat tones, tuning
signals and so on.
Push
NOTCH
until “AN (Auto Notch)” is displayed.
L Pushing
NOTCH
changes between “AN (Auto Notch),”
“MN (Manual Notch)” and OFF.
Displayed
D Manual Notch function
The Manual Notch lters out beat tones, tuning signals
and so on by adjusting a frequency in the NOTCH
menu.
1. Hold down
NOTCH
for 1 second to display the
NOTCH menu.
• The Manual Notch is automatically selected and “MN”
is displayed.
L Pushing [WIDTH] sets the Manual Notch filter width
to “WIDE,” “MID” or “NAR.”
2. Slowly adjust the POSITION to manually
attenuate the frequency.
NOTE: While adjusting, noise may be heard.
This comes from the DSP unit and does not indicate
an equipment malfunction.
Rotate
Push