Icom IC-7410 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)
In the SSB and AM modes, push to toggle the
notch function between auto, manual and OFF.
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.
ON.
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.
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
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.
proximately 5 Hz steps.
Lower pitch
$4 ∂TX SWITCH [∂TX] (p. 65)
Push to turn the ∂TX function ON or OFF.
∂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.
∂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.
or counterclockwise to decrease the frequency.
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
6