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Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Section 8: TSP command reference
DMM7510-901-01 Rev. B / May 2015
8-85
dmm.digitize.coupling.acfilter
This attribute selects the instrument settling time when coupling is set to AC.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Configuration script
Measure configuration list
dmm.AC_FILTER_SLOW
Usage
type
= dmm.digitize.coupling.acfilter
dmm.digitize.coupling.acfilter =
type
type
Type of AC coupling filter:
•
Slow (800 ms):
dmm.AC_FILTER_SLOW
•
Fast (80 ms):
dmm.AC_FILTER_FAST
Functions
dmm.FUNC_DC_VOLTAGE
dmm.FUNC_RESISTANCE
dmm.FUNC_ACV_FREQUENCY
dmm.FUNC_AC_VOLTAGE
dmm.FUNC_4W_RESISTANCE
dmm.FUNC_ACV_PERIOD
dmm.FUNC_DC_CURRENT
dmm.FUNC_DIODE
dmm.FUNC_DCV_RATIO
dmm.FUNC_AC_CURRENT
dmm.FUNC_CAPACITANCE
dmm.FUNC_DIGITIZE_CURRENT
dmm.FUNC_TEMPERATURE
dmm.FUNC_CONTINUITY
dmm.FUNC_DIGITIZE_VOLTAGE
Details
This option is only used when digitize signal coupling is set to AC.
When the signal coupling is set to AC, there may still be some DC signal content that comes in with
the AC signal. To allow this signal to settle out, you can set AC coupling filter to slow. When the filter
is set to slow, the instrument adds an 800 ms delay before making measurements.
When the AC coupling filter is set to fast, the instrument adds an 80 ms delay before making
measurements. Set the AC filter to fast for faster settling when measuring rapidly changing inputs.
For most digitize voltage measurements, the 80 ms delay is enough time for the range to settle.
Example
dmm.digitize.func = dmm.FUNC_DIGITIZE_VOLTAGE
dmm.digitize.coupling.type = dmm.COUPLING_AC
dmm.digitize.coupling.acfilter = dmm.AC_FILTER_FAST
Set the measure function to digitize voltage.
Set the coupling type to AC.
Set the filter to fast.
Also see
(on page 2-132)
dmm.digitize.coupling.acfrequency
(on page 8-86)
(on page 8-87)