Agilent Technologies E8257D PSG User Manual page 262

Peripheral Devices
N5102A Digital Signal Interface Module
Clock
I sample
4 bits per word
Q sample
4 bits per word
Clock
I sample
4 bits per word
Q sample
4 bits per word
248
2 Clocks Per Sample
Sample rate decreases by a factor of two
1 Sample Period
2 Clocks
4 Clocks Per Sample
Sample rate decreases by a factor of four
1 Sample Period
4 Clocks
Chapter 12