Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1990-09-12
1993-07-20
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
455 677, 455115, 4552264, H04B 1700
Patent
active
052300870
ABSTRACT:
A monitoring system which converts a desired radio frequency signal to an absolute value, detects the peak value of the signal, converts the peak value to a corresponding digital signal and processes the converted signal by a micro-computer to determine percent modulation of the signal and displays the result to the user. A plurality of signals may be monitored at the same time by multiplexing each signal onto a common signal line. The system my be remotely operated over an RS-232 line connected to a personal computer. The system also may be programmed with various alarm conditions such that when a monitored parameter falls outside of the desired range, the user is alerted to such condition.
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Schrock, Clifford B., "AM Broadcast Measurements Using Thespectrum Analyzer", Tektronik, Inc. 1976.
Burkhart, Dieter, et al., "Modulation analyzer FAM for 55 KHz through 1.36 GHz", News from Rohde & Schwarz 89, vol. 20, 1980, pp. 4-7.
Article entitled "Techniques of Program Level Measurement Applicable to FM Stereo", by Bolgiano, published in vol. 11, No. 1 of Journal of the Audio Engineering Society, pp. 58-60 (Jan. 1963).
Grant Mark
Meyer Arno M.
Belar Electronics Laboratory, Inc.
Eisenzopf Reinhard J.
Pham Chi
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