Rotate the [WIDTH] knob to the left or right to reduce the interference. ADVICE: The frequency display will show the bandwidth of the IF passband for 3 seconds whenever the [WIDTH] knob is turned. Referring to Figure "B", you can see the default bandwidth on the SSB mode. By rotating the [WIDTH] knob to the left, the bandwidth will narrow (see Figure "A", while rotation of the [WIDTH] knob to the right, as depicted in Fugure "C", will increase the bandwidth). The default bandwidths, and total bandwidth adjustment range, will vary according to the operating mode: SSB Mode: 1.8 kHz ~ 4.0 kHz (default: 2.4 kHz) CW Mode: 500 Hz ~ 2.4 kHz (default: 2.4 kHz) RTTY/DATA Modes: 500 Hz ~ 2.4 kHz (default: 500 Hz)

Using the IF SHIFT and WIDTH Together The IF SHIFT and Variable IF WIDTH features together form a very effective interference-fighting filtering system. For example, in Figure "A", you can see how interference has appeared both on the high and low sides of the desired signal. Rotate the [WIDTH] knob, the interference from one side can be eliminated (Figure "B"). Nest, rotated the [SHIFT] knob to re-position the passband (Figure "C"), the interference on the opposite side can be removed, without re-introducing the interference previously eliminated in Figure "B". ADVICE: For best interference reduction, the WIDTH and SHIFT features are the primary tools you should use, after narrowing the bandwidth (WIDTH) and/or adjusting the center of the passband (SHIFT). The Contour control may then yield additional signal-enhancement benefits on the net residual bandwidth. Even more, the IF NOTCH Filter (described later) may also be used, in conjunction with these filter systems, to significant advantage. End of "WIDTH (IF DSP Bandwidth) Tuning (SSB/CW/RTTY/DATA Modes) "