Icom IC-7700

1-11
^5 MANUAL NOTCH FILTER CONTROL [NOTCH]
(outer control; p. 5-19)
 Variesthenotchfrequencyofthemanualnotch
filter to reject an interfering signal while the manual
notch function is ON.
 •Notchfiltercenterfrequency:
SSB : –1060 Hz to 4040 Hz
CW : CW pitch freq. + 2540 Hz to CW pitch freq.
–2540 Hz
AM : –5100 Hz to 5100 Hz
^6 NOTCH SWITCH
NOTCH
(p. 5-19)
➥ Switches the notch function between auto, man-
ual and OFF in the SSB and AM modes.
➥ Turns the manual notch function ON or OFF
when pushed in the CW, RTTY and PSK31
mode.
➥ Turns the auto notch function ON or OFF when
pushed in FM mode.
   •“
MN
” appears when manual notch is in use.
   •“
AN
” appears when auto notch is in use.
➥ Switches the manual notch characteristics from
wide, middle and narrow when held down for 1
second.
✔ What is the notch function?
The notch function is a narrow filter that eliminates un-
wanted CW or AM carrier tones while preserving the de-
sired voice signal. The DSP circuit automatically adjusts
the notch frequency to effectively eliminate unwanted
tones.
^7 RIT/∂TX CONTROL [RIT/∂TX] (pp. 5-11, 6-4)
Shifts the receive and/or transmit frequency with-
out changing the transmit and/or receive frequency
shownonthemainVFO.
 •Rotatethecontrolclockwisetoincreasethefrequency,
or rotate the control counterclockwise to decrease the
frequency. The RIT or ∂TX functions must be ON.
 •Theshiftfrequencyrangeis±9.999kHzin1Hzsteps
(or ±9.99 kHz in 10 Hz steps).
^8 CW PITCH CONTROL [CW PITCH] (p. 4-5)
Shifts the received CW audio pitch and the CW
side tone pitch without changing the operating fre-
quency.
^9 RIT SWITCH
RIT
(p. 5-11)
➥ Tur ns the RIT function ON or OFF when
pushed.
   •Use[RIT/∂TX] control to vary the RIT frequency.
➥ Adds the RIT shift frequency to the operating
frequency when held down for 1 second.
✔ What is the RIT function?
Receiver incremental tuning (RIT) shifts the receive fre-
quency without shifting the transmit frequency.
This is useful for fine tuning stations calling you off-fre-
quency or when you prefer to listen to slightly different-
sounding voice characteristics, etc.
&0 CLEAR SWITCH
CLEAR
(pp. 5-11, 6-4)
Clears the RIT/∂TX shift frequency when held
down for 1 second or when pushed momentarily,
depending on the quick RIT/∂TX clear function
setting
(p. 12-15).
&1 ∂TX SWITCH
∂TX
(p. 6-4)
➥ Turns the ∂ TX function ON or OFF when
pushed.
   •Use[RIT/∂TX] control to vary the ∂TX frequency.
➥ Adds the ∂TX shift frequency to the operating
frequency when held down for 1 second.
✔ What is the ∂TX function?
∂TX shifts the transmit frequency without shifting the re-
ceive frequency. This is useful for simple split frequency
operation in CW, etc.
High
frequency
Low
frequency
Frequency
increases
Frequency
decreases
Higher
frequency
Lower
frequency
1
PANEL DESCRIPTION