Icom IC-7800 Instruction Manual page 19

1
PANEL DESCRIPTION
■ Front panel (continued)
*0 RIT/∂TX CONTROL [RIT/∂TX] (pgs. 5-10, 6-4)
Shifts the receive and/or transmit frequency without
changing the transmit and/or receive frequency
while the RIT and/or ∂TX functions are ON.
• Rotate the control clockwise to increase the frequency,
or rotate the control counterclockwise to decrease the
frequency.
• The shift frequency range is ±9.999 kHz in 1 Hz steps
(or ±9.99 kHz in 10 Hz steps).
Frequency
decreases
*1 PASSBAND TUNING CONTROLS [TWIN PBT]
(for MAIN band; p. 5-12)
*2 PASSBAND TUNING CONTROLS [TWIN PBT]
(for SUB band; p. 5-12)
Adjust the receiver's "passband width" of the DSP
filter.
• Passband width and shift frequency are displayed in the
multi-function display.
• Push [PBT CLEAR] for 1 sec. to clear the settings when
not in use.
• Variable range is set to half of the IF filter passband
width. 25 Hz steps and 50 Hz steps are available.
✔ What is the PBT control?
General PBT function electronically narrows the IF passband
width to reject interference. This transceiver uses the DSP
circuit for the PBT function.
Frequency
increases
1-10
*0 *1 *3 *4
(5 (6 (7
–
High cut Center
*3 PBT CLEAR SWITCH [PBT CLEAR]
(for MAIN band; p. 5-12)
*4 PBT CLEAR SWITCH [PBT CLEAR]
(for SUB band; p. 5-12)
Clears the PBT settings when pushed for 1 sec.
• The [PBT CLEAR] indicator above this switch lights
when PBT is in use.
*2
*5
*7
*8
*6
*9
(0
(1
(2
(3
(4
(8
PBT1
PBT2
+
Low cut