Keithley 2002

HP3458A Emulation Mode
H-4
APER
Purpose
To program the A/D integration time.
Format
APER <aperture>
Parameter
<aperture> = 166.67E-6s to 1s
Default 1.67E-4s
Query
APER? Returns aperture in seconds.
Description
The APER command programs the Model 2002 A/D integration period. The unit will accept values
between 0s and 1s, but it rounds values to meet the Model 2002’s valid parameter range.
Example
APER 1E-3 Program 1ms aperture.
ARANGE
Purpose
To enable/disable the autorange mode.
Format
ARANGE <range>
Parameter
<range>
<range> Parameter Numeric Equivalent Description
OFF 0 Disable autorange.
ON 1 Enable autorange.
ONCE 2 Autorange next reading.
Default
OFF
Query
ARANGE? Returns autorange status.
Description
ARANGE enables/disables autorange mode. The valid parameters are OFF, ON, and ONCE, which
correspond numerically to 0, 1, and 2 respectively.
Purpose
Autorange can also be controlled by the FUNC and RANGE commands. Specifying AUTO for the sec-
ond parameter of the FUNC command turns autoranging ON. Specifying AUTO for the first parameter
of the RANGE command turns autoranging ON.
Example
ARANGE ON Enable autorange.
ARANGE 0 Disable autorange.
AZERO
Purpose
To enable/disable the autozero mode.
Format
AZERO <mode>
Parameter
<mode>