Posts tagged ‘RF’

Building And Characterizing A DIY RF Power Sensor

Ever since I got my HP 436A power meter, I have been looking around hoping that I could obtain a compatible power sensor (e.g. 8484A) at a reasonable price to go with it. But these power sensors are quite expensive on the second-hand markets and even a non-functional unit can cost more than a hundred dollars. Since like most hobbyists, my requirements for a power sensor is not that high, I decided to build a simple RF power detector myself. Continue reading ‘Building And Characterizing A DIY RF Power Sensor’ »

4KHz-170MHz Wide Band RF Signal Generator – II

Continue with my previous article, let me first explain the code a little bit. Continue reading ‘4KHz-170MHz Wide Band RF Signal Generator – II’ »

4KHz-170MHz Wide Band RF Signal Generator – I

A signal generator can come in handy when working with digital and analog circuits. While most commercial grade signal generators offer more than just outputting a sinusoidal waveform, they are quite pricey for casual use. In this article, I will show you a simple wide band signal generator that is built around a Linear Technology’s LTC6905 Silicon Oscillator, which is can generate frequencies from roughly 17MHz to 170MHz. Along with a FairChild Semiconductor’s 74VHC4040 12-stage high speed binary counter, this signal generator is capable of generating precise frequencies from as low as 4KHz all the way through the ranges of LTC6905. Continue reading ‘4KHz-170MHz Wide Band RF Signal Generator – I’ »

Wide-band RF Field Strength Meter

Field strength meter is extremely useful when working with RF devices. It can be used to quickly diagnose whether a transmitter circuit is working, and can be used to detect RF signals in the environment. Continue reading ‘Wide-band RF Field Strength Meter’ »