CONFigure:FREQuency

Syntax | Description | Parameters | Remarks | Return Format | Examples

Syntax

CONFigure:FREQuency [{<range>|MIN|MAX|DEF} [,{<resolution>|MIN|MAX|DEF}] , ] [(@<ch_list>)]

Description

First, this command resets all measurement parameters on the specified channels to their default values. Then, configures the channels for frequency measurements but does not initiate the scan. If you omit the optional <ch_list> parameter, this command applies to the internal DMM, independent of any channels or a scan list.

The CONFigure command does not place the instrument in the "wait-for-trigger" state. Use the INITiate or READ? command in conjunction with CONFigure to place the instrument in the "wait-for-trigger" state.

Used With:

• 34921A through 34925A Multiplexer Modules

Parameters

Remarks

• If you omit the optional <ch_list> parameter, the configuration applies to the internal DMM, independent of any channels or a scan list (any existing scan list is not redefined). An error is generated if the internal DMM is not installed or is disabled.

• When you specify a range of channels with this command, any channels that are invalid will be ignored (no error will be generated) but the first and last channel in the range must be valid for the selected function. The Analog Bus relays (numbered s911, s912, s913, etc.) on the multiplexer and matrix modules are ignored if they are included in a range of channels. An error will be generated if an Analog Bus relay is specified as the first or last channel in a range of channels.

• The <range> parameter is required only to specify the measurement resolution parameter. Therefore, it is not necessary to send a new command for each new frequency to be measured.

• If the input signal is greater than can be measured on the selected range (manual ranging), the instrument gives an overload indication: "±OVLD" from the front panel or "±9.9E+37" from the remote interface.

• The *RST command will clear the scan list and set all measurement parameters to their factory settings. The Instrument Preset (SYSTem:PRESet command) will not clear the scan list; however, this command will clear reading memory and all stored statistical data.

Examples

The following program segment configures the instrument for frequency measurements on channel 4 in slot 3. The READ? command places the instrument in the "wait-for-trigger" state, scans the channel once, and then sends the reading to reading memory and the instrument's output buffer. The default range (autorange) and resolution (fixed at 6½ digits) are used for the measurement.

CONF:FREQ (@3004) ROUT:SCAN (@3004)
READ? (@3004)

Typical Response:  +1.32130000E+03

The following program segment configures the instrument for frequency measurements on channels 3 and 8 in slot 1. The INITiate command places the instrument in the "wait-for-trigger" state, scans the channels once, and stores the readings in memory. The FETCh? command transfers the readings from reading memory to the instrument's output buffer. The 100 Hz range and the default resolution (fixed at 6½ digits) are used for the measurement.

CONF:FREQ 100,(@1003,1008)
ROUT:SCAN (@1003,1008)
INIT
FETC?

Typical Response:  +4.27150000E+03,+1.32130000E+03

The following program segment configures the internal DMM for a frequency measurement (no <ch_list> is specified). The READ? command places the internal DMM in the "wait-for-trigger" state, initiates a trigger, and then sends the reading to reading memory and the instrument's output buffer. The default range (autorange) and resolution (fixed at 6½ digits) are used for the measurement.

CONF:FREQ  !Applies to the internal DMM
READ?

Typical Response:  +10.13240000E+03

See Also

CONFigure?

FETCh?

INITiate

MEASure:FREQuency?

READ?

ROUTe:SCAN

[SENSe:]FREQuency:RANGe:LOWer

[SENSe:]FREQuency:VOLTage:RANGe

SWEep:COUNt