Agilent Technologies 34420A Especificações descarregar pdf (Página 132)

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 meter

will stop making measurements when the output buffer fills. Readings

are not stored in the meter’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.

Caution

If you send two query commands without reading the response from the

first, and then attempt to read the second response, you may receive some

data from the first response followed by the complete second response. To

avoid this, do not send a query command without reading the response.

When you cannot avoid this situation, send a device clear before sending

the second query command.

Chapter 4 Remote Interface Reference

Simplified Programming Sequence

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Agilent Technologies 34420A Especificações Página 132