Owon HDS-N Series Manual de usuario descargar pdf (Pagina 76)

OWON HDS-N Series Handheld DSO & DMM 8-Advanced Function of Oscilloscope

Hanning

This is a very good window for measuring

amplitude accuracy but less so for resolving

frequencies.

Use Hanning for measuring sine, periodic and

narrow band random noise. This window works on

transients or bursts where the signal levels before

and after the event are significantly different.

Blackman

This is the best window for measuring the

amplitude of frequencies but worst

at resolving

frequencies.

Use Blackman-Harris for measuring predominantly

single frequency waveforms to look for higher

order harmonics.

Fig 61, 62, 63, 64 show four kinds of window function referring to sine wave of 1 kHz.

Fig 61: Rectangle window

Fig 62: Blackman window

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 87 88

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Owon HDS-N Series Manual de usuario Pagina 76