| 单词 | HDB3 (High Density Bipolar order 3) |
| 释义 | HDB3 (High Density Bipolar order 3) The line coding technique employed in E-1. HDB3 is a bipolar transmission method that reverses the polarity of alternate marks, or 1 bits, expressing the first as a 74570c08.qxd 9/11/07 12:21 PM Page 222 |
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