Agilent Technologies E8257D PSG User Manual page 284

Peripheral Devices
N5102A Digital Signal Interface Module
The skew has discrete values with a range that is dependent on the clock rate. Refer to
Timing for Phase and Skew Adjustments" on page 251
8. Enter the skew adjustment that best positions the clock with the valid portion of the data.
9. Press the Clock Polarity Neg Pos
This shifts the clock signal 180 degrees, so that the data starts during the negative clock
transition. This has the same affect as selecting the 180 degree phase adjustment.
10. Make the clock polarity selection that is required for the device being tested.
11. Press the hardkey to return to the first- level softkey menu.
Return
The clock source selection is also reflected in the first- level softkey menu graphic. For example, if
the device is the new clock source, you will see that the frequency reference is now connected to
the DUT and the DUT has an input clock line going to the N5102A module.
Selecting the Data Parameters
This procedure guides you through the data setup menu. Softkeys that have self- explanatory names
(for example, the
Word Size
softkeys, refer to the Agilent PSG Signal Generators Key Reference.
1. Refer to Figure 12-
Figure 12-19
This softkey menu accesses the various parameters that govern the data received by the PSG. The
status area of the display shows the number of data lines used for both I and Q along with the
clock position relative to the data.
270
softkey to Neg.
softkey) are generally not mentioned. For more information on all of the
19. Press the
Data Setup
Data Setup Menu Location
Figure 12- 20
for more information on skew settings.
softkey.
shows the data setup menu structure.
"Clock
Accesses the data setup menu
Chapter 12