278 Agilent X-Series Signal Generators User’s Guide
Digital Signal Interface Module (Option 003/004)
Operating the N5102A Module in Output Mode
b. Press the Clock Rate softkey and enter the appropriate clock rate.
Table 10- 7 provides a quick view of the settings and connections associated with each clock
source selection.
6. Press the Clock Phase softkey.
From the menu that appears, you can adjust the phase of the clock relative to the data in 90
degree increments. The selections provide a coarse adjustment for positioning the clock on the
valid portion of the data. Selecting 180 degrees is the same as selecting a negative clock polarity.
The 90 degree and 270 degree selections are not available when the clock rate is set below 10
MHz or above 200 MHz. If 90 degrees or 270 degrees is selected when the clock rate is set below
10 MHz or above 200 MHz, the phase will change to 0 degrees or 180 degrees, respectively.
NOTE The clock phase and clock skew may need to be adjusted any time the clock rate
setting is changed. Refer to
“Clock Timing for Phase and Skew Adjustments” on
page 264.
7. Enter the required phase adjustment.
8. Press the Return softkey to return to the clock setup menu.
9. Press the Clock Skew softkey.
This provides a fine adjustment for the clock relative to its current phase position. The skew is a
phase adjustment using increments of time. This enables greater skew adjustment capability at
higher clock rates. For clock rates below 25 MHz, this softkey is inactive.
The skew has discrete values with a range that is dependent on the clock rate. Refer to “Clock
Ta bl e 10-7 Clock Source Settings and Connectors
Clock Source Softkeys N5102A Module Connection
Reference
Frequency
Clock Rate
1
1
For the Internal selection, this sets the internal clock rate. For the External and Device selections, this tells the
interface module the rate of the applied clock signal.
Freq Ref Ext Clock In Device Interface
External
• •
Device
• •
Internal
2
2
There should be no clock signal applied to the Ext Clock In connector.
• • •
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