Keysight E8663D, Руководство пользователя

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280 Keysight E8357D/67D & E8663D PSG User’s Guide
Peripheral Devices
N5102A Digital Signal Interface Module
Clock Timing for Parallel Data
Some components require multiple clocks during a single sample period. (A
sample period consists of an I and Q sample). For parallel data transmissions,
you can select one, two, or four clocks per sample. For clocks per sample
greater than one, the I and Q samples are held constant to accommodate the
additional clock periods. This reduces the sample rate relative to the clock rate
by a factor equal to the clocks per sample selection. For example, when four is
selected, the sample rate is reduced by a factor of four (sample rate to clock
rate ratio). Figure 12-4 demonstrates the clock timing for each clocks per
sample selection. For input mode, the clocks per sample setting is always one.
Figure 12-4 Clock Sample Timing for Parallel Port Configuration
1 Sample Period
Q sample
1 Clock Per Sample
1 Clock
Clock and sample rates are the same
I sample
Clock
4 bits per word
4 bits per word