3. Noise measurement
Receiver systems often have to handle very weak signals, but internal noise added by system components and/or external noise, due for example to atmospheric phenomena, tend to interfere with these very weak signals.
The parameters that characterize a system's ability to handle low-level signals are sensitivity, bit error rate (BER) for digital communication systems, and noise figure. The latter characterizes both the system as a whole and its constituent components, such as the preamplifier, mixer and intermediate-frequency amplifier. Thus, by controlling the noise figure and gain of system components, the noise figure of the overall system can be directly controlled. Once the noise figure is known, sensitivity can easily be estimated from the system's bandwidth. Noise figure is one of the key parameters that differentiates one...
The Ultimate Scientific and Technical Reference
This article is included in
Electronic measurements and tests
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Noise measurement
Impedance measurement
Bibliography
Directory
Manufacturers – Suppliers – Distributors
Agilent technologies :
Anritsu:
Ballantine:
...Events
Microwave & RF: trade show for radio frequencies, microwaves, wireless and fiber optics, Paris (every year).
The Ultimate Scientific and Technical Reference
