Yaesu Musen Co. Ltd. 20251X50 사용자 설명서
FT-2000
Operating Manual
Vertex Standard Co., Ltd.
56
which will appear as a white area in the colored background area. The tuning rate
for the IF Notch is somewhat slow, allowing precise adjustment, so the use of the
Waterfall display to confirm proper adjustment is highly recommended.
for the IF Notch is somewhat slow, allowing precise adjustment, so the use of the
Waterfall display to confirm proper adjustment is highly recommended.
The performance of the IF Notch filter is shown in Figure (A), where the effect of
rotation of the [NOTCH] knobs is depicted. In Figure (B) you can see the notching
effect of the IF Notch filter as you rotate the [NOTCH] knobs to eliminate the incoming
interference.
Digital Noise Reduction (DNR) Operation
The Digital Noise Reduction (DNR) system is designed to reduce the level of random
nose found on the HF and 50 MHz band, and it is especially effective during SSB
operation. By rotating the [DNR] knob, any of sixteen different noise-reduction
algorithms can be selected; each of these algorithms was create for dealing with a
different noise profile, and you will want to experiment with the DNR system to find
the best setting according to the noise currently being experienced.
1. Press the [DNR] button. “DNR” icon will appear in the display, confirming that the
DNR system is engaged.
2. Rotate the [DNR] knob to select the setting that most effectively reduces the noise
level.
3. To disable the DNR system, press the [DNR] button once more. The “DNR” icon
will turn off, confirming that the DNR system is not active.
Advice: The Digital Noise Reduction effects to the Main band (VFO-A) only.
NARROW (NAR) One-Touch IF Filter Selection
Main band (VFO-A) “One-Touch Narrow” Operation
Pressing the [NAR] button provides one-touch, mode-specific selection of a narrow IF
DSP filter setting that does not depend on the setting of the [WIDTH] knob. Pressing
the [NAR] button once more returns the bandwidth control to the Width/Shift system.
The factory default bandwidths are:
SSB Mode
NARROW (NAR) One-Touch IF Filter Selection
Main band (VFO-A) “One-Touch Narrow” Operation
Pressing the [NAR] button provides one-touch, mode-specific selection of a narrow IF
DSP filter setting that does not depend on the setting of the [WIDTH] knob. Pressing
the [NAR] button once more returns the bandwidth control to the Width/Shift system.
The factory default bandwidths are:
SSB Mode
Pressing the [NAR] button selects a bandwidth of 1.8 kHz.
CW/RTTY/PKT Modes
Pressing the [NAR] button selects a bandwidth of 300 Hz.