IEEE-488 Reference
4-148
Note from the table that enabling auto filter with the Model 2001 on the ACI, or RMS, average
or LFRMS ACV function will disable (off) the filter. For the other measurement functions, en-
abling auto filter will enable the moving filter and set the filter count to 10.
Disabling auto filter has no effect on the currently programmed filter state and count.
The ONCE parameter is analogous to a momentary toggle switch. When ONCE is sent, the auto
filter will turn on momentarily and then disable.
Programming example 10 OUTPUT 716; “:curr:ac:aver:auto on; auto?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Enables the auto filter for the ACI function, and then queries the state of auto filter.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the state of auto filter (1; on).
4.19.12 Analog Filter
:FILTer[:LPASs][:STATe] <b>
[:SENSe[1]]:VOLTage[:DC]:FILTer[:LPASs][:STATe] <b> Control analog filter
Parameters <b> = 1 or ON Enable analog filter
= 0 or OFF Disable analog filter
Format :volt:filt <b>
Defaults Power-up Saved power-on setup
*RST OFF
:SYSTem:PRESet OFF
Query :FILTer[:LPASs][:STATe]?
Short-form formats: :filt?
Response message: 0 or 1
Description This command is used to enable or disable the analog filter for the DCV function. When enabled,
an RC network filters out high frequency (>10kHz) noise on the input signal. The analog filter
is most effective when measuring voltages greater than 2V p-p on the 2V p-p on the 2V or 20V
range. See paragraph 3.9.7 for details on the analog filter.
Programming example 10 OUTPUT 716; “:volt:filt on; filt?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Enables the analog filter for DCV and then queries the state.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the state of the filter (1).
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