[SENSe:]VOLTage:AC:BANDwidth
[SENSe:]VOLTage:AC:BANDwidth
Syntax
[SENSe:]VOLTage:AC:BANDwidth {<filter>|MIN|MAX}[,(@<ch_list>)]
[SENSe:]VOLTage:AC:BANDwidth? [{(@<ch_list>)|MIN|MAX}]
Description
The instrument uses three different AC filters which enable you to either optimize low-frequency accuracy or achieve faster AC settling times. The instrument selects the slow (3 Hz), medium (20 Hz), or fast (300 Hz) filter based on the input frequency that you specify with this command for the selected channels.
Used With:
- 34901A 20 Channel Multiplexer (2/4-wire) Module
- 34902A 16 Channel Multiplexer (2/4-wire) Module
- 34908A 40 Channel Single-Ended Multiplexer Module
Parameters
Name Type Range of Values Default Value <filter> Discrete {3|20|200} 20 <ch_list> Channel List One or more channels, as shown:
(@310) - channel 10 on the module in slot 300.
(@305:310) - channels 05 through 10 on the module in slot 300.
(@202:207,209,302:308) - channels 02 through 07 and 09 on the module in slot 200 and channels 02 through 08 on the module in slot 300.
If you omit the optional <ch_list> parameter, this command applies to the currently defined scan list.
Remarks
- This command applies to AC voltage measurements only. For the <filter> parameter, specify the lowest frequency expected in the input signal on the specified channels. The instrument selects the appropriate filter based on the frequency you specify.
- The CONFigure and MEASure? commands automatically select the default 20 Hz (medium) filter.
- The instrument selects the default 20 Hz (medium) filter after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting.
- The settling delay is controlled by the ROUTe:CHANnel:DELay command. You get the default delay with ROUTe:CHANnel:DELay:AUTO ON.
| Input Frequency | Default Settling Delay | Minimum Settling Delay |
|---|---|---|
| 3 Hz to 300 kHz (Slow) | 7 seconds / reading | 1.5 seconds |
| 20 Hz to 300 kHz (Medium) | 1 second / reading | 200 ms |
| 200 Hz to 300 kHz (Fast) | 0.12 seconds / reading | 20 ms |
Return Format
The query returns 3 (slow), 20 (medium), or 200 (fast) for each channel specified. Multiple responses are separated by commas.
Examples
The following command selects the slow filter (3 Hz) on channels 03 and 13 in slot 100.
VOLT:AC:BAND 3,(@103,113)
The following query returns the ac filter settings on channels 03 and 13 in slot 100.
VOLT:AC:BAND? (@103,113)
Typical Response: 3,3