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List of amateur radio modes The following is a list of the modes of radio communication used in the amateur radio hobby.
Free-space path loss In telecommunications, the free-space path loss (FSPL) (also known as free-space loss, FSL) is the attenuation of radio energy between the feedpoints of two antennas that results from the combination of the receiving antenna's capture area plus the obstacle-free, line-of-sight (LoS) path through free space (usually air). [1] The "Standard Definitions of Terms for Antennas ...
Signal strength and readability report. A signal strength and readability report is a standardized format for reporting the strength of the radio signal and the readability (quality) of the radiotelephone (voice) or radiotelegraph (Morse code) signal transmitted by another station as received at the reporting station's location and by their ...
PL/PQ platforms Volkswagen Group has previously introduced an alphanumeric nomenclature for car platforms. The platform code is composed as follows: A letter, P, indicating a passenger car platform A letter indicating the configuration of the engine: Q indicates a transverse engine (Quer in German) L indicates a longitudinal engine (Längs in ...
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Volkswagen Group engines are not widely known by "engine families" in the same way some other manufacturers do. [citation needed] VW Group engines are commonly known by the type of fuel they use, their displacement, and their rated motive power output. [citation needed] VW Group does have names of engine series, and individual engines are identified by an "ID code" (early codes were one or two ...
Traffic Message Channel (TMC) is a technology for delivering traffic and travel information to motor vehicle drivers. It is digitally coded using the ALERT C or TPEG protocol into Radio Data System (RDS) [1] carried via conventional FM radio broadcasts. It can also be transmitted on Digital Audio Broadcasting or satellite radio.
Friis' original formula Friis' original idea behind his transmission formula was to dispense with the usage of directivity or gain when describing antenna performance. In their place is the descriptor of antenna capture area as one of two important parts of the transmission formula that characterizes the behavior of a free-space radio circuit. [2]