✔ 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.
$1 NOTCH SWITCH [NOTCH] (p. 61)
(Mode = Auto notch : SSB/AM/FM
Manual notch : SSB/CW/RTTY/AM)
➥ In the SSB and AM modes, push to toggle the
notch function between auto, manual and OFF.
•EithertheAutoorManualNotchfunctioncanbe
turned OFF in the “[NOTCH] SW” item of the Set
mode. (p. 88)
➥ In the FM mode, push to turn the Auto Notch
function ON or OFF.
➥ In the CW or RTTY mode, push to turn the Man-
ual Notch function ON or OFF.
•“MNF”appearswhentheManualNotchfunctionis
ON.
•“ANF”appearswhentheAutoNotchfunctionisON.
•NoiconappearswhentheNotchfunctionisOFF.
➥ 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.
•Notchltercenterfrequency:
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
$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.
•Thepitchcanbeadjustedfrom300to900Hzinap-
proximately 5 Hz steps.
$4 ∂TX SWITCH [∂TX] (p. 65)
➥ Push to turn the ∂TX function ON or OFF.
•Usethe[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.
•Rotatethecontrolclockwisetoincreasethefrequency,
or counterclockwise to decrease the frequency.
•Thefrequencyshiftrangeis±9.999kHzin10Hzsteps.
The control tunes in 1 Hz steps when the operating fre-
quency readout is set to the 1 Hz step readout.
Shift high
Shift low
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PANEL DESCRIPTION
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Higher pitch
Lower pitch
Higher frequency
Lower frequency
PBT2
PBT1
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Low cutHigh cut Center
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