Icom IC-7850 Instruction Manual page 27

&3 DIGITAL RF SELECTOR KEY [DIGI-SEL]
(p. 7-12)
Push to turn the digital RF preselector ON or OFF.
• The [DIGI-SEL] indicator lights white when the preselec-
tor is in use.
&4 PASSBAND TUNING CONTROLS [TWIN PBT]
(p. 7-5)
Adjusts the receiver's IF filter
the DSP.
• The passband width and shift frequency are displayed in
the Multi-function display.
• Hold down [PBT CLEAR] for 1 second to clear the PBT
settings.
• The adjustment range is half of the selected filter pass-
band width, and the value is adjustable in 25 Hz steps
for the SSB/CW/RTTY/PSK modes, and 100 Hz steps
for the AM mode.
–
High cut
✔ 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.
&5 RIT/∂TX CONTROL [RIT/∂TX]
Shifts the receive and/or transmit frequency without
changing the transmit and/or receive frequency.
• Rotate the control clockwise to increase the frequency,
or rotate the control counterclockwise to decrease the
frequency. The RIT or ∂TX functions must be ON.
• The shift frequency range is ±9.999 kHz in 1 Hz steps (or
±9.99 kHz in 10 Hz steps).
'passband width'
PBT2
PBT1
Center Low cut
(pp. 7-3, 8-5)
using
+
1-11
PANEL DESCRIPTION
1