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Notes: #The DSR is usually expressed in Bits Per Second . #The data Signaling rate is given by where ''m'' is the number of parallel channels, ''ni'' is the number of significant conditions of the Modulation in the ''i''-th Channel , and ''Ti'' is the Unit Interval , expressed in seconds, for the ''i''-th channel. #For Serial Transmission in a single channel, the DSR reduces to (1/''T'')log2''n''; with a two-condition modulation, i. e. ''n'' = 2, the DSR is 1/''T''. #For Parallel Transmission with equal unit intervals and equal numbers of significant conditions on each channel, the DSR is (''m''/''T'')log2 ''n''; in the case of a two-condition Modulation , this reduces to ''m''/''T''. #The DSR may be expressed in bauds, in which case, the factor log2''ni'' in the above summation formula should be deleted when calculating bauds. #In Synchronous Binary Signaling , the DSR in Bits Per Second may be numerically the same as the Modulation Rate expressed in bauds. Signal processors, such as four- Phase modems, cannot change the DSR, but the modulation rate depends on the Line modulation scheme, in accordance with Note 4. For example, in a 2400 bit/s 4-phase sending Modem , the signaling rate is 2400 bit/s on the Serial Input side, but the modulation rate is only 1200 bauds on the 4-phase Output side. ''See also:'' Bit Rate , Transfer Rate . ''Based upon'' Federal Standard 1037C . |
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