Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
Patent
1993-09-17
1995-09-12
Urban, Edward F.
Telecommunications
Receiver or analog modulated signal frequency converter
Measuring or testing of receiver
4552263, 455 673, 324614, H04B 1700
Patent
active
054506239
ABSTRACT:
A measuring apparatus is provided which is capable of measuring CN ratio. The measuring apparatus has a measuring band specifying unit for specifying a band under measurement; a display for displaying the spectrum of levels measured in the specified band; first and second noise measuring frequency specifying units; a transmission channel selector; and a CN ratio calculating unit for estimating a noise level at a carrier of a selected transmission channel and for calculating the CN ratio using the estimated level.
REFERENCES:
patent: 4125809 (1978-11-01), Mott
patent: 5313651 (1994-05-01), Kurita
Test & Measurement Catalog published by Hewlett-Packard Company, 1991, pp. 245, 250-252, 264, 268-269.
"New CATV Techniques" edited by Electric Telecommunication Technology Committee, issued Nov. 20, 1987 pp. 246-257 (No translation).
"All of Spectrum Analyzer" issued May 20, 1977 by Yokogawa-Hewlett-Packard Ltd., pp. 229-231 (No translation).
"Techniques for Broadcasting Satellite" issued Nov. 20, 1982 by Nippon Hohso Publishing Kyokai, pp. 40-45 (No translation).
"A computer-controlled satellite communications monitoring system for time division multiple access", Comsat Technical Review, Fall 1984, vol. 14, No. 2 (pp. 391-430).
European Search Report, Dec. 23, 1993.
Ishida Kenichi
Nagai Masaaki
Saito Kakuya
Yokoyama Itoshi
Leader Electronics Corp.
To Doris
Urban Edward F.
LandOfFree
CN ratio measuring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with CN ratio measuring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CN ratio measuring apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-414534