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Quam (company)
Quam may refer to: * Quam Heights, a mostly snow-covered ridge of Antarctica * Quam Lake, a lake in Minnesota See also * C-QUAM C-QUAM (Compatible QUadrature Amplitude Modulation) is the method of AM stereo broadcasting used in Canada, the United States and most other countries. It was invented in 1977 by Norman Parker, Francis Hilbert, and Yoshio Sakaie, and published i ... * QAM {{Disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quam Heights
Quam Heights () is a mostly snow-covered heights, 15 miles (24 km) long and 4 miles (6 km) wide, rising over 1,000 m and forming the coastline between the Barnett and Dennistoun Glaciers in northern Victoria Land, Antarctica. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photography, 1960–63. The site was named by the Advisory Committee on Antarctic Names (US-ACAN) for Louis O. Quam, chief scientist of the National Science Foundation The National Science Foundation (NSF) is an independent agency of the United States government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National I ...'s Office of Polar Programs, 1967–72. Mountains of Victoria Land Pennell Coast {{VictoriaLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quam Lake
Quam Lake is a lake in Douglas County, in the U.S. state of Minnesota Minnesota () is a state in the upper midwestern region of the United States. It is the 12th largest U.S. state in area and the 22nd most populous, with over 5.75 million residents. Minnesota is home to western prairies, now given over to .... Quam Lake was named for P. J. Quam. See also * List of lakes in Minnesota References Lakes of Minnesota Lakes of Douglas County, Minnesota {{DouglasCountyMN-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C-QUAM
C-QUAM (Compatible QUadrature Amplitude Modulation) is the method of AM stereo broadcasting used in Canada, the United States and most other countries. It was invented in 1977 by Norman Parker, Francis Hilbert, and Yoshio Sakaie, and published in an IEEE journal. Using circuitry developed by Motorola, C-QUAM uses quadrature amplitude modulation (QAM) to encode the stereo separation signal. This extra signal is then stripped down in such a way that it is compatible with the envelope detector of older receivers, hence the name C-QUAM for Compatible. A 25 Hz pilot tone is added to trigger receivers; unlike its counterpart in FM radio, this carrier is not necessary for the reconstruction of the original audio sources. Description The C-QUAM signal is composed of two distinct modulation stages: a conventional AM version and a compatible quadrature PM version. Stage 1 provides the transmitter with a summed L+R mono audio input. This input is precisely the same as conventional AM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |