CLOCk
Command/Query The CLOCk command is used to specify the clock source for the pattern
generator. The choices are INTernal or EXTernal. With an internal clock
source, the clock period must also be specified (real number value).
With an external clock source, the clock frequency range must be specified
as one of the following:
•Less than or equal to 50 MHz (LEFifty)
•Greater than 50 MHz and less than or equal to 100 MHz (GTFifty)
•Greater than 100 MHz (GTONe)
The maximum clock rate is limited by the output channel mode selected (see
FORMat:MODe command).
Command Syntax :FORMat:CLOC k INTernal,<clk_ period>

:FORMat:CLOC k EXTernal,{LEFi fty|GTFifty|GTONe}

<clk_period> a real number clock period that corresponds to the front-panel selectable
clock period values.
Query Syntax :FORMat:CLOCk?
Returned Format [:FORMat:CLOCk] INTernal,<clk_period>

[:FORMat:CLO Ck] EXTernal,{LE Fifty|GTFifty|GTONe}

Example 10 DIM Cl$[100]
20 OUTPUT XXX;":FORMAT:CLOCK?"
30 ENTER XXX;Cl$
40 PRINT Cl$
50 END
This example queries and prints the current clock settings.
FORMat Subsystem
CLOCk
38–3