[SENSe:]PERiod:APERture
Syntax
[SENSe:]PERiod:APERture {<seconds>|MIN|MAX|DEF} [, (@<ch_list>)]
[SENSe:]PERiod:APERture? [{(@<ch_list>)|MIN|MAX}]
Description
This command selects the aperture time (also called gate time) for period measurements on the specified channels. If you omit the optional <ch_list> parameter, this command applies to the internal DMM, independent of any channels or a scan list.
Used With:
34921A through 34925A Multiplexer Modules
Parameters
Name |
Type |
Range of Values |
Default Value |
<seconds> |
Discrete |
Desired gate time in seconds: 10 ms (4 |
100 ms |
<ch_list> |
Numeric |
One or more channels in the form (@sccc). |
If <ch_list> is omitted, this command applies to the internal DMM. |
Remarks
For the <seconds> parameter, you can substitute MIN or MAX for a numeric value. MIN selects the smallest value accepted, which gives the lowest accuracy; MAX selects the largest value accepted, which gives the highest accuracy.
If you omit the optional <ch_list> parameter, the configuration applies to the internal DMM, independent of any channels or a scan list (any existing scan list is not redefined). An error is generated if the internal DMM is not installed or is disabled.
Since frequency and period are related functions, changing a measurement parameter for one function will also change the corresponding parameter for the other function (see [SENSe:]FREQuency:APERture command).
The instrument sets the aperture time to 100 ms after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting.
Return Format
The query command returns the aperture time in the form "+1.00000000E-01" for each channel specified. Multiple responses are separated by commas.
Examples
The following command sets the gate time to 10 ms on channels 3 and 13 in slot 1.
PER:APER 10E-03,(@1003,1013)
The following query returns the gate time selected on channels 3 and 13 in slot 1.
PER:APER? (@1003,1013)
Typical Response: +1.00000000E-02,+1.00000000E-02