346 Agilent X-Series Signal Generators SCPI Command Reference
Digital Signal Interface Module Commands
Digital Subsystem—Option 003 and 004 ([:SOURce])
If this command is executed when the clock source is not set to internal, the parameter value is
changed, but it is not used by the signal generator until the clock source is changed to internal.
Because a query returns the currently set value, regardless of the clock source, you must query both
states (reference frequency and clock source) to know the signal generator’s current setup.
Example
:DIG:CLOC:REF:FREQ 50MHZ
The preceding example specifies a 50 megahertz external reference frequency.
*RST +1.00000000E+007
Range 1 MHz–100 MHz
Key Entry
Reference Frequency
:DIGital:CLOCk:SKEW
Supported N5172B/82B with option 003 or 004 or both
:DIGital:CLOCk:SKEW <value>
:DIGital:CLOCk:SKEW?
This command sets the clock signal skew value. The skew is a fine- tune adjustment for the course
tune clock phase function and helps to align the clock with valid data states. This is useful at high
clock rates and available only for clock frequencies above 10 megahertz. The variable <value> is a
expressed in nanoseconds.
Example
:DIG:CLOC:SKEW 2NS
The preceding example sets the clock skew to 2 nanoseconds.
*RST +0.00000000E+000
Range –5ns to 5ns
Key Entry
Clock Skew
:DIGital:CLOCk:SOURce
Supported N5172B/82B with option 003 or 004 or both
:DIGital:CLOCk:SOURCe INTernal|EXTernal|DEVice
:DIG:CLOC:SOURCe?
This command selects one of three possible clock sources.
Example
:DIG:CLOC:SOUR DEV
The preceding example uses the “Device Interface Connector” input clock.
*RST INT
Key Entry
Clock Source
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