Icom IC-746PRO Manual page 36

Advanced Twin PBT
• Passband width and shift frequency are displayed in the multi-function
switch indicator.
• [TWIN PBT] should normally be set to the center positions or when the
(PBT setting is cleared) best when there is no interference.
– When PBT is used, the audio tone may be changed.
– Variable range is set to half of the IF filter passband width. 25 Hz steps and
50 Hz steps are available.
– These controls function as an IF shift control while in AM mode and when
the RTTY filter is turned ON. Only the inner control may function in this
case.
• Graphics of these controls function as an IF shift control.