Icom IC-746PRO Manual page 162

• Selects one of 3 IF filter settings.
– Enters the filter set mode
• For SSB and CW modes, the passband width can be set within 50 to
3600 Hz in 50 or 100 Hz steps. A total of 41 passband widths are
available.
• For RTTY mode, the passband width can be set within 50 to 2700 Hz in
50 or 100 Hz steps. A total of 32 passband widths are available.
• For AM and FM modes, the passband width is fixed and 3 passband
widths are available independently.
– The filter selection is automatically memorized in each mode.
– The PBT shift frequencies are automatically memorized in each filter.
Filter 1
when pushed for 1 sec.