| 释义 |
two-binary, one-quaternary two-binary, one-quaternary (communications)(2B1Q) A physical layer encoding used forIntegrated Services Digital Network basic rate interface.2B1Q represents two bits (2B - a "dibit") using one of foursignal levels (1Q - a "quadratude"). The first bit of thedibit is indicated by polarity: positive indicates a binary 1and negative indicates a 0. The second half of the dibit isindicated by voltage magnitude: 1 Volt indicates a binary 1and 3 Volts indicates binary 0. |