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AD9545BCPZ датащи(PDF) 58 Page - Analog Devices |
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AD9545BCPZ датащи(HTML) 58 Page - Analog Devices |
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58 / 157 page ![]() AD9545 Data Sheet Rev. A | Page 58 of 157 For example, determine the value of the Qxy phase bit field necessary to yield a 14% pulse width given E = 7301. Solving Equation 1 for Qxy phase yields the following: Qxy Phase = Pulse Width × E/100 = 14 × 7301/100 = 1022 (nearest integer) = 0x0000003FE (hexadecimal) The user has the option to adjust the output pulse width only prior to execution of the first subsequent phase offset. After invoking a subsequent phase offset, pulse width control is no longer available. To change the output pulse width after executing the first subsequent phase offset, the user must issue a Q divider sync (see the Distribution Output Clock Synchronization section), at which point the Q divider is ready to accept a new initial phase offset, a new output pulse width ,and subsequent phase offsets. |
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