NI 波形基本原理手册.pdf

NI-FGEN 2023-03-01 NI-FGEN Contents 2 NI-FGEN NI-FGEN 4 NI-FGEN Waveform Fundamentals Bandwidth and Passband Flatness specific frequency content. 以 some NI signal generators. frequency. 5 NI-FGEN near the selected frequency. Sample Rate waveform shape. 1 ■=Sample Rale 2 MS/s ·= Sample Rato 20 MS/s Nyquist Theorem 6 NI-FGEN t wave. Shannons Sampling Theorem t 7 NI-FGEN waveform is a1MHz signal. Aliased Images fai=|fo+nfs| where fai =the aliased images f。=the desired waveform frequency fs =the sample rate n =an integer(either positive or negative) off. fai=5MHz=|1MHz+(-1)(6 MHz)| onto the sampling points of the image. 8 NI-FGEN t frequency spectrum. Signal 6oi Imagos. Power 1 MHz 5 MHz7 MHz 11 MHz13 MHz 6 MHz 12 MHz fs 2fs DAC Resolution 153μV. 9 NI-FGEN waveform. 10.00 111 8.75 110 7.50 101 16-Bi