A Simple Electric Motor: Variable speed drives in the industry employ a simple electric motor as their drive motors mainly because they enjoy several specific advantages, such as overload capacity, smooth speed control over a…
Electric Voltage: Electric Voltage states that, according to the structure of an atom, we know that there are two types of charges: Positive and Negative. A force of attraction exists between these positive and negative…
CCIF Intermodulation Distortion: In the second method of carrying out an CCIF Intermodulation Distortion test, the two test signals used have equal amplitude, and relatively high but slightly different frequencies. When non-linear distortion is present,…
Nonlinear Distortion Measurements: One of the methods of Nonlinear Distortion Measurements consists of simultaneously applying two sinusoidal voltages of different frequencies to the amplifier input and observing the sum, difference and various combination frequencies that…
Selectivity Measurement Receiver: The Selectivity Measurement Receiver is its ability to reject, (adjacent) unwanted signals. It is expressed as a curve, such as the one in Fig. 16.5, which shows the attenuation that the receiver…
Sensitivity Measurement Definition: The Sensitivity Measurement Definition of a radio receiver is its ability to amplify weak signals. It is often defined in terms of the voltage that must be applied to the receiver input…
RF UHF field strength meter circuit: There are two general methods available for determination of RF UHF field strength meter circuit. One is the standard antenna method. In this, use is made of an antenna…
Simple Cylindrical Cavity Wavemeter: Resonant cavities find extensive use as wavemeter at microwave frequencies. They enjoy high accuracy, mechanical simplicity, and a large physical size in proportion to the wavelength being measured. Practical cavity wavemeter…
Resonant Coaxial Wavemeter: A Resonant Coaxial Wavemeter line such as illustrated in Fig. 16.1 and operating as a resonant system can be used to measure frequencies in the range of 600 — 10,000 MHz. At…
Microwave Power Measurement Techniques: Microwave Power Measurement Techniques can be done by the use of wavemeters. A wavemeter is an adjustable resonant circuit provided with a calibration that gives the resonant frequency in terms of…