[SENSe:]COUNter:GATE:POLarity

34980A

[SENSe:]COUNter:GATE:POLarity

Syntax

[SENSe:]COUNter:GATE:POLarity <polarity>, (@<ch_list>)

[SENSe:]COUNter:GATE:POLarity? (@<ch_list>)

Description

This command sets the logic polarity of the Gate input line for counter operations on the 34950A Digital I/O Module (each bank has it's own Gate input line). You can specify the gate polarity as "normal" (active high, default) or "inverted" (active low). Changing the gate polarity while an initiated measurement is in progress (see [SENSe:]COUNter:INITiate command) is not allowed.

Used With:

  • 34950A Digital I/O Module

Parameters

Name

Type

Range of Values

Default Value

<polarity>

Discrete

{NORMal|INVerted}

NORMal (active high)

<ch_list>

Numeric

One or more counter channels in the form (@sccc).
Select from s301 or s302.

This is a required parameter

Remarks

  • If you change the gate polarity while a counter operation is in progress, the count on the specified channels will be cleared.

  • The selected gate polarity is stored in volatile memory and will be set to "NORM" when power is turned off or after a Factory Reset (*RST command).

Return Format

The query command returns "NORM" or "INV" for the specified channels. Multiple responses are separated by commas.

Examples

The following command selects an inverted gate polarity (active low) on counter channels 301 and 302 on the module in slot 3.  

COUN:GATE:POL INV,(@3301,3302)

The following query returns the gate polarity on counter channels 301 and 302 on the module in slot 3.

COUN:GATE:POL? (@3301,3302)

Typical Response:  INV,INV

See Also

[SENSe:]COUNter:GATE:SOURce