Icom IC-7850 Instruction Manual - Page 27

Previous view &3 D IGITAL 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 preselector is in use. &4 P ASSBAND TUNING CONTROLS [TWIN PBT] (p. 7-5) Adjusts the receiver's IF filter "passband width" using the DSP. • The passband width and shift frequency are displayed in the Multi-function display. • H old down [PBT CLEAR] for 1 second to clear the PBT settings. • The adjustment range is half of the selected filter passband 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. PBT2 PBT1 - + High cut Center Low 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] (pp. 7-3, 8-5) 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). 1 PANEL DESCRIPTION 1-11