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FUNCTIONS FOR RECEIVE
N
4WIN0"4OPERATION
-ODE33"#72449!-
To reject interference, PBT (Passband Tuning) elec-
tronically narrows the IF passband width by shifting the
IF frequency slightly outside of the IF filter passband.
The IC-9100 uses DSP for the PBT function. Moving
both [TWIN-PBT] controls shift the IF passband cen-
ter frequency both above and below the received fre-
quency.
±
The LCD graphically shows the passband width and
frequency shift.
±
Hold down [FILTER] for 1 second to display the “FIL”
screen (Filter). Current passband width and fre-
quency shift are displayed in the “FIL” screen.
±
Hold down [PBT-CLR] for 1 second to set the IF
frequency to the center position.
s4HEhDOTvDISAPPEARS
The PBT is adjustable in 50 Hz steps in the SSB/CW/
2449MODESAND(ZINTHE!-MODE
In this time, the shift value changes in 25 Hz steps
INTHE33"#72449MODESAND(ZINTHE!-
mode.
s4HE;47).0"4=CONTROLSSHOULDNORMALLYBESET
to the center positions when there is no interfer-
ence. The PBT setting should be cleared.
s7HEN THE 0"4 IS USED THE AUDIO TONE MAY
change.
s4HE CONTROLS DO NOT FUNCTION IN THE &- AND $6
modes.
s7HILEROTATINGTHE;47).0"4=CONTROLSNOISEMAY
occur. This comes from the DSP unit and does not
indicate an equipment malfunction.
s0USHING;0"4#,2=DISPLAYSTHElLTERPASSBAND
width and shift value for 1 seconds on the function
display.
[TWIN-PBT]
[PBT-CLR]
D U P
A G C
C O M P T B W
S C P
M1
S
+ 2 5
B
2 . 3 K
Passband width and shift
value are displayed while
[TWIN PBT] is used.
Appears when pass-
band is shifted.
B W
S S B - 2 2 . 4 K
R : 1 5 K
S H A R P
FIL
S
0
B
2 . 4 K
B W
S S B - 2 2 . 4 K
R : 1 5 K
S H A R P
FIL
S
+ 2 0 0
B
2 . 0 K
sh&),v
SCREEN&ILTER DISPLAY
s7HILEADJUSTINGTHE0"4SETTING
Appears when the passband is shifted.
Shows the selected filter and passband width.
0"4/0%2!4)/.%8!-0,%
Both controls in the center
positions (or hold down
[PBT-CLR] for 1 second.)
Cutting the lower
passband edge
Cutting both lower and
higher passband edges
PBT2
PBT1
PBT2
PBT1
PBT2
PBT1
IF center frequency
Interference
Desired signal
Passband
Interference
Interference
Desired signal
Passband