302 Keysight E8357D/67D & E8663D PSG User’s Guide
Peripheral Devices
N5102A Digital Signal Interface Module
—
clock polarity selection
2.
Press the
Clock Source
softkey.
From this menu, select the clock signal source. With each selection, the
clock routing display in the signal generator clock setup menu will change
to reflect the current clock source. This will be indicated by a change in
the graphic.
3.
Select the clock source.
If External or Device is Selected
Press the
Clock Rate
softkey and enter the clock rate of the externally
applied clock signal.
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
For the
External
selection, the signal is supplied by an external clock
source and applied to the Ext Clock In connector. For the
Device
selection,
the clock signal is supplied through the Device Interface connector,
generally by the device being tested.
If Internal is Selected
Using an external frequency reference, the N5102A module generates its
own internal clock signal. The reference frequency signal must be applied
to the Freq Ref connector on the digital module.
a.
Press the
Reference Frequency
softkey and enter the frequency of
the externally applied frequency reference.
b.
Press the
Clock Rate
softkey and enter the appropriate clock rate.
provides a quick view of the settings and connections
associated with each clock source selection.
Table 12-9
Clock Source Settings and Connectors
Clock
Source
Softkeys
N5102A Module Connection
Reference
Frequency
Clock Rate
a
a. 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
x
x
Device
x
x
Internal
b
x
x
x
