Agilent-technologies 34401A Manuel d'utilisateur télécharger pdf (Page 120)

Using the range and resolution Parameters

With the MEASure? and CONFigure commands, you can select the

measurement function, range, and resolution all in one command.

Use the range parameter to specify the expected value of the input

signal. The multimeter then selects the correct measurement range.

For frequency and period measurements, the multimeter uses one

“range” for all inputs between 3 Hz and 300 kHz. The range parameter

is required only to specify the resolution. Therefore, it is not necessary

to send a new command for each new frequency to be measured.

Use the resolution parameter to specify the desired resolution for

the measurement. Specify the resolution in the same units as the

measurement function, not in number of digits. For example, for

dc volts, specify the resolution in volts. For frequency, specify the

resolution in hertz.

You must specify a range to use the resolution parameter.

Using the READ? Command

The READ? command changes the state of the trigger system from the

“idle” state to the “wait-for-trigger” state. Measurements will begin

when the specified trigger conditions are satisfied following the receipt

of the READ? command. Readings are sent immediately to the output

buffer. You must enter the reading data into your bus controller or the

multimeter will stop making measurements when the output buffer

fills. Readings are not stored in the multimeter’s internal memory when

using the READ? command.

Sending the READ? command is like sending the INITiate command

followed immediately by the FETCh? command, except readings are not

buffered internally.

Chapter 4 Remote Interface Reference

Simplified Programming Overview

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Agilent-technologies 34401A Manuel d'utilisateur Page 120