There are many key indicators for measuring the quality of an oscilloscope testing system, and the “Effective Number of Bits (ENOB)” is crucial for understanding the entire measurement system. This article will discuss the effective bits of oscilloscopes, the impact of ENOB on actual signal testing, and provide methods for solving it using EXCEL in … Read more
“The FFT function on an oscilloscope is a tool that provides a frequency domain view of signals. Understanding how the FFT function on the oscilloscope can bring digital and RF designs to market.” How to Access FFT on Keysight Oscilloscopes The FFT menu includes options for selecting the type of FFT spectrum calculation, allowing you … Read more
1. Calling Methods X=FFT(x); X=FFT(x, N); x=IFFT(X); x=IFFT(X, N) When performing spectral analysis with MATLAB, note: (1) The data structure of the return value from the FFT function is symmetric. Example: N=8; n=0:N-1; xn=[4 3 2 6 7 8 9 0]; Xk=fft(xn) →Xk =39.0000 -10.7782 + 6.2929i 0 – 5.0000i 4.7782 – 7.7071i 5.0000 4.7782 … Read more
Comparison of FFT Performance in Mainstream Oscilloscopes FFT, as a simple frequency spectrum testing tool, has become a standard feature in oscilloscopes. EEVBlog conducted a comparison of the FFT capabilities of mainstream oscilloscopes, selecting several common models to show their performance. Of course, the evaluation method is somewhat subjective, primarily relying on visual observation. We … Read more
Abstract: NB-IoT is an emerging cellular technology that better supports applications requiring large connections, low power consumption, low throughput, low device costs, and high latency tolerance. Compared to LTE systems, the random access channel NPRACH in the NB-IoT system has been redesigned. A detailed analysis of the structural design of NPRACH in the NB-IoT system … Read more