Typically they move in geosynchronous orbits about 22,300 mi (35,900 km) above the earth and operate at frequencies near 4 gigahertz for downlinking and 6 GHz for uplinking.

典型的通讯卫星位于地球同步轨道，约在地球上方35，900公里处，操作频率向地传输4吉赫，向上传输为6吉赫。

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The new line of phones feature a quad-core processor called K3V2 that was developed in-house and timed at 1.2 gigahertz per second (GHz).

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AMD's new quad-core Phenom desktop processors based on AMD's four-core Barcelona design will be available at clock speeds of 2.3 gigahertz and 2.2 GHz.

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It runs on Microsoft 's (nasdaq: MSFT - news - people ) Windows XP and requires a PC with an Intel (nasdaq: INTC - news - people ) Pentium 4 running at 1.3 gigahertz or higher, though a chip running at 2 Ghz or higher is recommended.

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