Icom IC-i7410 Instruction Manual page 13

✔ What is the PBT control?
The PBT function electronically modifies the IF passband
width to reject interference. This transceiver uses the
DSP circuit for the PBT function.
–
High cut Center
$1 NOTCH SWITCH [NOTCH] (p. 61)
(Mode = Auto notch
Manual notch: SSB/CW/RTTY/AM)
➥ In the SSB and AM modes, push to toggle the
notch function between auto, manual and OFF.
• Either the Auto or Manual Notch function can be
turned OFF in the "[NOTCH] SW" item of the Set
mode. (p. 88)
➥ In FM mode, push to turn the Auto Notch
the
function ON or OFF.
➥ In CW or RTTY mode, push to turn the Man-
the
ual Notch function ON or OFF.
• "MNF" appears when the Manual Notch function is
ON.
• "ANF" appears when the Auto Notch function is ON.
• No icon appears when the Notch function is OFF.
➥ Hold down for 1 second to switch the manual
filter characteristics from wide, mid and narrow
when the Manual Notch function is selected.
✔ What is the notch filter?
The notch filter is a narrow filter that eliminates unwanted
CW or AM carrier tones, while preserving the desired
voice signal. The DSP circuit automatically adjusts the
notch frequency to effectively eliminate unwanted tones.
$2 MANUAL NOTCH FILTER CONTROL [NOTCH]
(inner control; p. 61)
Rotate to adjust the notch frequency to reject an inter-
fering signal when the Manual Notch function is ON.
• Notch filter center frequency:
SSB/RTTY : –1040 Hz to +4040 Hz
CW : CW pitch freq. –2540 Hz to
CW pitch freq. +2540 Hz
AM : –5060 Hz to +5100 Hz
Lower frequency
PBT2
PBT1
+
Low cut
: SSB/AM/FM
Higher frequency
PANEL DESCRIPTION
$3 CW PITCH CONTROL [CW PITCH]
(outer control; p. 37)
Rotate to shift the received CW audio pitch and the
CW sidetone pitch without changing the operating
frequency.
• The pitch can be adjusted from 300 to 900 Hz in ap-
proximately 5 Hz steps.
Lower pitch
$4 ∂TX SWITCH [∂TX] (p. 65)
➥ Push to turn the ∂TX function ON or OFF.
• Use the [RIT/∂TX] control to vary the ∂TX frequency.
➥ Hold down for 1 second to shift the transmit fre-
quency up or down by the ∂TX frequency shift.
✔ 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.
$5 CLEAR SWITCH [CLEAR] (pp. 53, 65)
Hold down for 1 second* to clear the RIT/∂TX fre-
quency shift.
* When the "Quick RIT Clear" item in the Set mode is set
to "ON," push momentarily to reset the frequency shift.
(p. 88)
$6 RIT SWITCH [RIT] (p. 53)
➥ Push to turn the RIT function ON or OFF.
• Use [RIT/∂TX] control to vary the RIT frequency.
➥ Hold down for 1 second to shift the receive fre-
quency up or down by the RIT frequency shift.
✔ What is the RIT function?
The RIT (Receiver Incremental Tuning) shifts the receive
frequency 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.
$7 RIT/∂TX CONTROL [RIT/∂TX] (pp. 53, 65)
When either or both the RIT/∂TX functions are ON,
rotate to adjust the RIT/∂TX frequency shift.
• Rotate the control clockwise to increase the frequency,
or counterclockwise to decrease the frequency.
• The frequency shift range is ±9.999 kHz in 10 Hz steps.
The control tunes in 1 Hz steps when the operating fre-
quency readout is set to the 1 Hz step readout.
Shift low
1
Higher pitch
Shift high
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