FT-2000
Operating Manual
Vertex Standard Co., Ltd.
22
WIDTH Knob
The outer [WIDTH] knob, when turned to the 12 o’clock position, sets the overall IF
bandwidth of the Main band (VFO-A) receiver to its maximum bandwidth. Turning the
[WIDTH] knob either direction, reduces the overall IF bandwidth of the Main band
(VFO-A) receiver.
When the NAR (Narrow) filter selection is engaged, the [WIDTH] knob is disabled.
Use this control to narrow the IF DSP passband, as necessary, to reduce interference.
The SHIFT control may be used to re-center the passband response on the incoming
signal, and you may find that the CONTOUR and IF Notch Filter may also help
improve intelligibility and/or reduce interference. See also the discussions of the
[CONTOUR] knob and [NOTCH] knob.
Advice: When the [NAR] button has been pushed, the [WIDTH] control no longer
function. The IF SHIFT system is still fully operational, however.
58. CONT Switch
This button turns the Main band (VFO-A) receiver’s CONTOUR filter on and off. When
the CONTOUR Filter is activated, appears the graphically depict the peak position of
the CONTOUR Filter in the display. Adjustment of the CONTOUR filter’s center
frequency is provided by the [CONTOUR] knob.
Note: There are times, when you’re trying to remove interference with a sharp DSP
filter, that the remaining signal has a somewhat unnatural sound. This is caused by
the cutting of some frequency components, leaving other components in excess. The
CONTOUR filter allows you (especially) to roll off certain frequency components inside
the remaining passband, but in a smooth manner that helps restore a natural sound
and/or raise intelligibility.
59. DNR Switch
This button turns the Main band (VFO-A) receiver’s Digital Noise Reduction circuit on
and off. When the Digital Noise Reduction is activated, “DNR” icon appears in the
display. Adjustment of the Noise Reduction level is provided by the [DNR] knob.
60. CONTOUR -o- DNR Knob
CONTOUR Knob
The inner [CONTOUR] knob selects the desired Main band (VFO-A) receiver’s
