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Keysight E1459A SCPI Command Reference
The INPut Subsystem configures the input de-bounce circuitry and specifies the input
clock source.
Syntax
INPutn:CLOCk[:SOURce] <source>
Specifies the input circuitry clock source for Port n.
Parameters
Parameter Name
INPutn
<source>
Comments
Example
50
INPutn
:CLOCk[:SOURce] <source>
:CLOCk[:SOURce]?
:DEBounce:TIME <time> | MINimum | MAXimum | DEFault
:DEBounce:TIME? [MINimum | MAXimum | DEFault]
Parameter Type
numeric
discrete
– When the clock source is set to INTernal, the input data is sampled by the
internal clock. When the clock is set to EXTernal, the input data is sampled
on negative-edge transitions of the input clock.
– This is the clock source for clocking new data from the optical isolators into
the input circuitry. New data is automatically clocked into the input
debounce circuitry for each clock pulse of the internal clock when the
clock source is INTernal. Refer to the INPut:DEBounce:TIME command to
set the Debounce time.
– For a clock source of EXTernal, new data is clocked into the input circuitry
when the external clock receives a clock pulse. Data is clocked into the
input circuitry on the positive edge of the external clock.
– Note that the debounce circuitry, current value registers, and event
detectors are always clocked by the internal clock.
– Note: if a Data Available Event is enabled for the port, attempting to set
the clock source to INTernal will result in an error -221, "Settings Conflict".
– *RST Condition: sets the input clock source to INTernal.
INP1:CLOC:SOUR EXT
INPut Subsystem
Range of Values
0, 1, 2, 3
INTernal, EXTernal
Sets the input clock source for Port 1 to External
Keysight E1459A/Z2404B User and SCPI Programming Guide
DISPlay:MONitor Subsystem
Default
0
INT
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