| 单词 | PM |
| 释义 | PM 1. Phase Modulation. More commonly known as phase-shift keying (PSK). See PSK. 2. Physical Medium. In the ATM reference model, and other OSI-like models, a Physical Layer sublayer that specifies the physical and electro-optical interfaces with the transmission media. The PM also provides timing functions. See also ATM reference model and Physical Layer. |
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