Agilent Technologies 8935 Series Manual de usuario descargar pdf (Pagina 89)

Chapter 4 89

IEEE Common Commands

Common Command Descriptions

*IDN? (Identification Query)

The *IDN? query causes a device to send its identification information

over the bus. The Test Set responds to the *IDN? command by placing

its identification information, in ASCII format, into the Output Queue.

The response data is obtained by reading the Output Queue into a

string variable of length 72. The response data is organized into four

fields separated by commas. The field definitions are described in Table

4-2.

NOTE

The Serial Number format can take one of two forms:

A = alpha character

X = numeric character

The form returned will depend upon the manufacturing date of the Test

Set being queried.

Example BASIC program

Example 4-1 Example

10 DIM A$[10]20 OUTPUT 714;"*IDN?"

30 ENTER 714;A$

40 PRINT A$

50 END

Table 4-2 Device Identification

Field Contents Response from Test

Set

Comments

1 Manufacturer Agilent Technologies

2 Model Depends upon Model of

Test Set

3 Serial Number US12345678 ASCII character “0”, decimal

value 48, if not available

4 Firmware Revision Level A.01.08 ASCII character “0”, decimal

value 48,if not available

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 328 329

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Agilent Technologies 8935 Series Manual de usuario Pagina 89