Radio Mods: Unlocking frequency limitations of the Yaesu FRG-8800 receiver Paolo Viappiani (SWL I1-11437) shares the following. Please note that, as with any radio equipment modifications, the risk of performing this task is your own. This is a very simple modification, but if you feel it may be beyond your skill level, consider hiring a … Read more
Wireless technology is ubiquitous. The number of new wireless devices that can connect wirelessly is increasing, and their data consumption is growing day by day. The number of wireless devices and data consumption is increasing exponentially every year. To meet such demands, many organizations are researching new wireless technologies to improve existing wireless architectures. To … Read more
How much is worth spending?Written by: Onno VK6FLAB This week, I finally decided to buy my first software-defined radio with transmission capabilities. For me, this was not an easy choice, as I had to choose from products ranging from low prices to “beyond my budget,” and there are countless options among these choices. Aside from … Read more
DIY a multi-band vertical portable antenna, click the video to learn more↓↓↓ 【Ham DIY】Spent less than 10 yuan to create a second-hand car intercom system, giving new life to abandoned intercoms 【Ham DIY】How to build a V dipole antenna to receive meteorological satellite cloud images 【Ham DIY】Refrigerator ground network and butter cookie box signal booster, … Read more
As the number of devices connected wirelessly continues to increase, there is an urgent need for wireless technologies that can meet higher data and capacity demands. The surge of Internet of Things (IoT) devices has placed a significant burden on existing wireless networks, and with the rise of video streaming and virtual reality technologies, the … Read more
Click the blue text to follow us With the rapid development of modern communication technology, the widespread deployment of 5G technology has increased the level of electromagnetic field (EMF) exposure in people’s daily lives. Although a large number of studies have explored the effects of electromagnetic radiation on biological organisms, these studies often focus on … Read more
On ARMv7, we know that sp is R13, lr is R14, and PC is R15; on ARMV8, lr is x30, and sp and pc are no longer separate general-purpose registers. What is the reason for this design? 1. Why can’t sp and pc map to general-purpose registers? The reason for pc is to prevent users … Read more
In 1991, Huawei established its own ASIC design center, specifically responsible for designing “Application-specific integrated circuits (ASICs).” At that time, Huawei had only been founded for four years, with only a few dozen employees, and was financially strapped, nearly on the brink of bankruptcy. The foundational C&C08 digital program-controlled switch was still three years away. … Read more
Software Defined Radio (SDR) is a wireless communication technology that is based on software-defined radio protocols rather than through hardwired implementations. The bandwidth, air interface protocols, and functions can be upgraded via software downloads and updates without completely replacing the hardware. Today, we walk into a simplified SDR radio design with Uncle BG5WKP, which is … Read more
Figure 1: 2001 Phantom v5 Video Camera The Phantom v5 is a high-speed, high-resolution camera launched by Vision Research in 2001, capable of capturing video at 1024×1024 pixels and 1000 frames per second. It has since been discontinued. Today, we will explore its internal workings through disassembly. Upon disassembly, we discovered that the timing and … Read more