Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1987-08-11
1989-12-26
Tarcza, Thomas H.
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
455 9, 455 42, 324118, 371 204, H04B 1700
Patent
active
048903337
ABSTRACT:
A test bench is designed to determine the transfer function of a radio link in terms of variations in amplitude and a group propagation time depending on frequency. A transmission section of the test bench comprises an oscillator delivering a pulse signal having a predetermined intermediate frequency, a generator generating an exploration signal having a predetermined low frequency and a marking pulse signal synchronous with the exploration signal, a summator summating the exploration signal and an analog signal into a wobbulation signal, a r.f. wobbulator controlled by the wobbulation signal for producing a wobbulated signal to be transmitted. In a receiving section of the test bench, an analyzer receives the wobbulated signal via said radio link to analyze parameters of the radio link, such as the link group propagation time. According to the invention, the transmission section comprises a modulator for modulating the intermediate-frequency pulse signal during pulses of said marking pulse signals thereby deriving a periodically modulated measurement signal forming said analog signal applied to the summatior, and the receiving section comprises a frequency recovering circuit for deducing signals synchronous with the exploration signal as from signals produced by the analyzer.
REFERENCES:
patent: 4025854 (1977-05-01), Oades
patent: 4363131 (1982-12-01), Froese et al.
patent: 4365346 (1982-12-01), Froese et al.
patent: 4375698 (1983-03-01), Onotera et al.
Delahaye Jean-Yves
Vinson Jean-Paul
Sotomayor John B.
Tarcza Thomas H.
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