YOKOGAWA DL750 - Page 551

15-19
IM 701210-06E
Using the DSP Channel (Optional)
15
The cutoff frequency, center frequency, and pass band can be specified in terms of
percentages of fs (sampling frequency).
Type Filter Band
1
Cutoff Frequency
2
Center Frequency
3
Pass Band
4
Sharp HPF 2.0% to 30.0% - -
BPF - 3.0% to 30.0% 2% of fs
- 4.6% to 30.0% 5% of fs
- 7.0% to 30.0% 10% of fs
- 9.6% to 30.0% 15% of fs
- 12.0% to 30.0% 20% of fs
IIR HPF 0.2% to 30.0% - -
BPF - 0.6% to 30.0% 1% of fs
- 1.2% to 30.0% 2% of fs
- 2.6% to 30.0% 5% of fs
- 5.2% to 30.0% 10% of fs
- 7.6% to 30.0% 15% of fs
- 10.2% to 30.0% 20% of fs
Diff (differentiation) Performs the same computation as the differentiation described in section
15.4.
1 HPF: High-pass filter, BPF: Band-pass filter
2 The cutoff frequency (CutOff) can be specified only when HPF is selected.
The resolution is 0.2%.
3 The center frequency can be specified only when BPF is selected.
The resolution is 0.2%.
4 The pass band can be specified only when BPF is selected.
You can select the pass band from 1%, 2%, 5%, 10%, 15%, and 20%.
Setting the Elimination Level
Set the reference level for noise elimination. The selectable range and resolution of the
elimination level are the same as those of the trigger level. See section 6.5.
Setting Value/Div
Like V/div, Value/Div is set using 1-2-5 steps. The selectable range is 10.00E–21
[Value/Div] to 500.0E+18 [Value/Div] with 123 settings.
Turn the V/DIV knob to set the Value/Div value. You can also set Value/Div by pressing
the Value/Div soft key and turning the jog shuttle.
Automatically Selecting the Optimum Value/Div Setting
When you press the Optimize Value/Div soft key, the optimum range is automatically
selected from the 123 Value/Div settings, and the waveform is displayed using the
selected setting.
Zooming in on the Waveform
• Zooming in or out Vertically by Setting the Magnification
For details, see section 5.8, “Zooming Vertically by Setting the Zoom Rate” and
“Notes Concerning Display” in section 15.1.
• Zooming/Expanding Vertically According to the Upper and Lower Limits of the
Display Range
For details, see section 5.9, “Zooming Vertically According to the Upper and Lower
Limits of the Display Range” and “Notes Concerning Display” in section 15.1.
15.6 Using the Knocking Filter (DSP Channels)