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| 型号： | 2532 |
| 厂商： | B&K Precision |
| 文件页数： | 48/70页 |
| 文件大小： | 0K |
| 描述： | OSCOPE 40MHZ DIGITAL STORAGE |
| 产品目录绘图： | 25xx |
| 特色产品： | DSO Series |
| 标准包装： | 1 |
| 系列： | 2532 |
| 类型： | 工作台 - 数字 |
| 带宽： | 40MHz |
| 通道： | 2 |
| 显示器类型： | LCD - 彩色 |
| 接口： | USB |
| 功能： | 记录、回放、保存、趋势 |
| 探头类型： | 无源 10:1（2） |
| 采样率（每秒）： | 500M |
| 输入阻抗： | 1M - 13pF |
| 上升时间（标准值）： | 8.8ns |
| 电压 - 输入（最大）： | CAT II 300V |
| 电源电压： | 100 ~ 240VAC |
| 包括： | 探针，软件，USB 线缆 |
| 其它名称： | BK2532 |
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Table 3-6
Window
Rectangular
Hanning/
Hamming
Blackman
Characteristics
Best frequency resolution, worst
magnitude resolution. This is
essentially the same as no window.
Better frequency, poorer magnitude
accuracy than Rectangular.
Hamming has slightly better
frequency resolution than Hanning.
Best magnitude, worst frequency
resolution.
Application/ Measurement
Symmetric transients or bursts.
Equal-amplitude sine waves with
fixed frequencies. Broadband
random noise with a relatively
slowly varying spectrum.
Sine, periodic, and narrow-band
random noise. Asymmetric
transients or bursts.
Single frequency waveforms, to
find higher order harmonics.
4. Magnifying and Positioning an FFT Spectrum
You can magnify and use cursors to take measurements on the FFT spectrum. The oscilloscope includes an
FFT Zoom option to magnify horizontally. To magnify vertically, you can use the vertical controls.
5. Measuring an FFT Spectrum Using Cursors
You can take two types of measurements on FFT spectrums: magnitude (in dB) and frequency (in Hz).
Magnitude is referenced to 0 dB, where 0 dB equals 1 Vrms. You can use the cursors to take
measurements at any zoom factor.
Use horizontal cursors to measure magnitude and vertical cursors to measure frequency.
Make sure to
select the “MATH” as source in the cursor menu.. The options display the delta between the two cursors,
the value at cursor 1 position, and the value at cursor position. Delta is the absolute value of cursor 1 minus
cursor 2.
NOTE ：
●
●
●
The FFT of a waveform that has a DC component or offset can cause incorrect FFT waveform
magnitude values. To minimize the DC component, choose AC Coupling on the source waveform.
To display FFT waveforms with a large dynamic range, use the dBVrms scale. The dBVrms scale
displays component magnitudes using a log scale.
The Nyquist frequency is the highest frequency that any real-time digitizing oscilloscope can acquire
without aliasing. This frequency is half that of the sample rate, provided it is within the analog
bandwidth of the oscilloscope. Frequencies above the Nyquist frequency will be under sampled,
which causes aliasing.
48
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