Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-09-26
1977-05-24
Safourek, Benedict V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 57DE, H04B 1702, H04B 100
Patent
active
040258548
ABSTRACT:
A composite test signal consisting of a search test signal and a sweep test signal from a link test set is combined with the through-path traffic signals during in-service testing. The composite signals are simultaneously applied to a transmitter of a microwave radio communication link under test. The sweep signal level is adjusted at the microwave radio communication link transmitter so that the total FM deviation is limited to the normal IF or RF transmission frequency band. The composite test signals and traffic signals are received and split into a through path signal and a test path signal. In the through path, the test signals are blocked, and the traffic signals are transmitted to the next microwave radio hop. In the test path, the traffic signals are blocked, and the test signals are applied to the receive section of a link test set. The link test set is then used to measure the transmission characteristics of the microwave radio communication link under test.
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S. Christensen & I. Matthews, "A New Microwave Link Analyzer for Communications Systems Carrying up to 2700 Telephone Channels," Hewlett Packard Journal, vol. 27, No. 3, pp. 13-24, Nov. 1975.
Bookbinder Marc E.
Cannon Russell A.
Cool Leonard R.
GTE Automatic Electric Laboratories Incorporated
Safourek Benedict V.
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