ConceptDistributed Antenna System (orDAS) is a predetermined space or building with multiple spatially separated antenna nodes connected through multiple signal transmission media A mobile communicati...

The working method of ultrasonic gas leakage detection principleIf a container or pipeline is filled with gas, when the internal pressure is stronger than the external pressure, due to the large press...

CnSCA: ChinaNon-stickCoatingAssoctiationSince its inception, non-stick coatings have immediately swept the market with their excellent anti-corrosion properties and non-stick properties, and are widel...

1. Main technical indicators1.1 General characteristic indicatorsThe frequency bands commonly used by mobile phones in my country mainly include CDMA1X and 800MHz frequency bands occupied by CDMA mobi...

DefinitionIntroductionThe frequency band of China Railway is 885-889MHz in the uplink direction and 930-934MHz in the downlink direction. The GSM-R system includes four parts: Network Subsystem (NSS),...

CausesIn actual work, it is often necessary to limit the observation time of the signal within a certain time interval. The process of taking a limited amount of data, that is, truncating the signal,...

OSA certification introductionChinese super-hard tools need to pass three barriers to go abroad. Chinese super-hard tools industry enterprises need to solve three problems if they want to enter the in...

ConceptIf the data is not intercepted in the whole cycle, the truncation will cause sudden changes at both ends of the signal waveform. The intercepted signal is very different from the original signa...

DevelopmentThe handheld hard disk duplicators in the international market can be roughly divided into two generations of products. The first-generation duplicator represented by SF-5000, SOLOII, and S...

Classic ExperimentIn the 1960s, Walter Mischel, a professor of psychology at Stanford University in the United States, designed a famous experiment on "delayed gratification". This experiment is It st...

IntroductionMemory latency indicates the time the system waits for memory response before entering the data access operation ready state. It is usually represented by 4 consecutive Arabic numerals, su...

When experimenting with animals, place the food in one of the two containers in front of the animal, and cover it so that the animal cannot eat immediately, that is, cover the stimulus, and then relea...

PrincipleDuring the scanning process of the instrument, after the sensor detects the leakage signal, it converts them into audio signals that can be heard by human ears and displays them on the large...

FeaturesAll application modules are specially designed for on-site installation.　Pc software tool can analyze the measurement results.　The optical telephone can carry out two-party communication and...

IntroductionThe book "Communication Test Instruments" has 15 chapters, including signal generators, electronic oscilloscopes, electronic counters, ultra-high frequency millivolt meters, distortion met...