01 What made me curious about passive probes It all started with a question: can a 1X passive probe be used to match a 50-ohm or 75-ohm system like a coaxial cable? Experienced individuals would immediately say no, because even a 1X probe has a significant resistor in series. I happened to have a broken … Read more
With the rapid development of electronic technology, communication signal frequencies are increasing, and the quality requirements for signals are becoming more stringent. Is it enough to just choose an expensive oscilloscope to measure these high-speed signals? Not necessarily; if some details are overlooked, even the most expensive oscilloscope may not provide accurate measurements! 1. Bandwidth … Read more
Before learning how to use an oscilloscope to reduce noise, let’s first understand how noise in oscilloscopes arises. Many people who have just transitioned from analog oscilloscopes to digital oscilloscopes may complain that the waveforms measured by their new oscilloscope are not as clear as those from their old analog oscilloscope, even doubting whether their … Read more
Many students have probably experienced this: While watching short videos at home, suddenly the network lags during an exciting moment in a game, and the video won’t load, causing characters to fly off the map??? Lying in bed playing on your phone, you turn over and the Wi-Fi disconnects, leaving you isolated from the internet??? … Read more
Source: ZTE Document Original Author: FM MKT and Solution Team This article introduces the characteristics of each generation of Wi-Fi technology from Wi-Fi 4 to Wi-Fi 7. Rapid Development of Wi-Fi Technology Each new generation of Wi-Fi protocol brings higher wireless rates. From Wi-Fi 4 to Wi-Fi 7: Wireless network technology has significantly improved, achieving … Read more
Theoretical Speed • Wi-Fi speed continues to improve with updates to the Wi-Fi protocol. Wi-Fi speed has undergone a development process from slow to fast. The initial theoretical wireless transmission speed of Wi-Fi was only 11 Mbit/s, and after several updates, we have achieved the current results. • Wi-Fi speed is further enhanced with the … Read more
What is Functional Magnetic Resonance Imaging? Various magnetic resonance imaging techniques based primarily on conventional T1WI and T2WI mainly display the morphological structures of human organs or tissues and their signal intensity changes, collectively referred to as conventional MRI examinations or conventional MR imaging sequences. With the development of MRI system hardware and software, various … Read more
LoRa Study: Setting and Explanation of Key LoRa Parameters (Spreading Factor, Coding Rate, Bandwidth) 1. Spreading Factor (SF) 2. Coding Rate (CR) 3. Signal Bandwidth (BW) 4. Relationship between LoRa Signal Bandwidth BW, Symbol Rate Rs, and Data Rate DR 5. Setting of LoRa Signal Bandwidth, Spreading Factor, and Coding Rate For specific applications, developers … Read more
PCI Express is a technology that often makes headlines, from the release of every generation of Intel and AMD processors to the recent significant drop in prices of M.2 interface solid-state drives. Therefore, this core bus technology of modern computers, how exactly does it work? PCI vs. PCI Express: High Clock Speeds Determine High Speeds … Read more
Limit bandwidth for specific IP addresses in OpenWrt 1. Script for limiting bandwidth Use a custom script to limit the bandwidth for specific IP addresses or address ranges for connected devices. # !/bin/sh # Define incoming and outgoing interfaces (IDEV for internal network interface, ODEV for external network interface) IDEV=”tunAcc” ODEV=”br-wan” # Define total upstream … Read more