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Icom IC-R9500 Manual

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5
RECEIVE FUNCTIONS
■ Noise reduction
The noise reduction function reduces random noise
components and enhances desired signals which are
buried in noise. The DSP performs the random noise
reduction function.
q Push the [NR] to turn the noise reduction ON.
• [NR] indicator above this switch lights green.
w Rotate the [NR] control to adjust the noise reduction
level.
e Push the [NR] switch to turn the noise reduction
OFF.
•[NR] indicator lights off.
Setting the [NR] control too high can result in audio
signal masking or distortion. Set the [NR] control for
maximum readability.
■ Notch function
This receiver has auto and manual notch functions.
The auto notch function uses DSP to automatically at-
tenuates up to 3 beat tones, tuning signals, etc., even if
they are moving. The manual notch can be set to at-
tenuate a frequency via the [NOTCH1]/[NOTCH2] con-
trols.
The auto notch can be used in SSB, AM, FM and WFM
modes.
The manual notch can be used in SSB, CW, FSK and
AM modes.
• Auto notch indication
➥ Push [ANF] to turn the auto notch function ON and
OFF in FM, WFM, AM and SSB modes.
• [ANF] indicator above this switch lights green.
•“ ” appears when auto notch is in use.
• Manual notch indication
➥ Push [NOTCH1] or [NOTCH2] to turn the manual
notch function ON and OFF, manual and OFF in
AM, SSB, CW and FSK modes.
• [NOTCH1]/[NOTCH2] indicators above these switches
light green.
•“ ” or “ ” appear when manual notch is in use.
• Push and hold [NOTCH1] or [NOTCH2] for 1 sec. to se-
lect the notch filter width for manual notch from wide,
middle and narrow.
• Set to attenuate a frequency for manual notch via the
[NOTCH1] or [NOTCH2] controls.
While tuning the manual notch, noise may be heard.
This comes from the DSP unit and does not indicate
an equipment malfunction.
MN2
MN1
AN
[ANF]
[NOTCH1] control [NOTCH2] control
[NOTCH1] [NOTCH2]
[NR]
[NR] control
… 82 …


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