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72
V5.1
‐
March
2010
Fig.45 - Hamming window
Quick Tips
If desired, use the zoom feature to magnify the FFT waveform.
Use the default dBV RMS scale to see a detailed view of multiple frequencies,
even if their amplitudes vary greatly. Use the linear RMS scale to see an overall
view of how frequencies compare.
Signals that have a DC component or an offset can cause incorrect FFT
waveform component magnitude values. To minimize the DC component, choose
AC Coupling on the source signal.
To reduce random noise and aliased components in repetitive or single-shot
events, set the oscilloscope acquisition mode to ‘average’.
NOTE 1:
Nyquist frequency:
The highest frequency that a Real Time Digital Oscilloscope
can measure at exactly half the sampling rate is called the Nyquist frequency. If
under-sampling occurs when the frequency sampled is higher than the Nyquist
frequency, “False Wave” phenomenon will occur. The relationship between the
frequency being sampled and measured is of great importance in this context.
NOTE 2:
In FFT mode, the following settings are prohibited:
1) Window
set
2) Changing the source channel (in CH1 Setup or CH2 Setup menu)
Содержание HOS-MS420
Страница 11: ...10 V5 1 March 2010 FRONT PANEL AND KEYPAD OVERVIEW Figure 3 ...
Страница 32: ...31 V5 1 March 2010 Figure 20 AC Coupling ...
Страница 59: ...58 V5 1 March 2010 Fig 34 Vertical mode multi period waveform Fig 35 Horizontal mode multi period waveform ...
Страница 72: ...71 V5 1 March 2010 Fig 42 Rectangle window Fig 43 Blackman window Fig 44 Hanning window ...
Страница 79: ...78 V5 1 March 2010 ...
Страница 85: ...84 V5 1 March 2010 Figure 4 Continuity Test ...
Страница 89: ...88 V5 1 March 2010 ...
Страница 91: ...90 V5 1 March 2010 Figure 10 400mA AC Current Measurement ...
Страница 95: ...94 V5 1 March 2010 ...
Страница 103: ...102 V4 0 March 2010 Range Accuracy Resolution 40 00mA 1 5 1 digit 10uA 400 0mA 1 5 1 digit 100uA 10A 3 3 digit 10mA ...