[SENSe:]COUNter:FREQuency[:DATA]?
Syntax
[SENSe:]COUNter:FREQuency[:DATA]? (@<ch_list>)
Description
This command returns the frequency measured on the specified counter channels on the 34950A Digital I/O Module.
Used With:
34950A Digital I/O Module
Parameters
|
Name |
Type |
Range of Values |
Default Value |
|
<ch_list> |
Numeric |
One or more counter channels in the form (@sccc).
|
This is a required parameter |
Remarks
The frequency is measured as: (NumberRisingEdges
– 1)/GateTime. The specified counter channels must detect at least two edges for a valid frequency measurement. The maximum input frequency allowed is 10 MHz. If the specified channels have been configured for a totalizer measurement (see CONFigure:COUNter:TOTalize command), the [SENSe:]COUNter:FREQuency[:DATA]? command will return "+9.91000000E+37".
Return Format
The command returns the frequency in hertz for each counter channel specified. Multiple responses are separated by commas.
Example
The following command configures counter channels 301 and 302 on the module in slot 3 for frequency measurements and reads the results.
CONF:COUN:FREQ
1E-3,(@3301,3302)
COUN:INIT (@3301,3302)
COUN:FREQ? (@3301,3302)
Typical Response: +3.45600000E+05,+3.31300000E+05