Agilent Technologies HP 54601B Specifiche Scaricare il pdf (Pagina 38)

Communicating over the bus

Since GPIB can address multiple devices through the same interface card,

the device address passed with the program message must include not only

the correct interface select code, but also the correct instrument address.

Interface Select Code (Selects Interface)

Each interface card has a unique interface select code. This code is used by

the controller to direct commands and communications to the proper

interface. The default is typically “7” for GPIB controllers.

Instrument Address (Selects Instrument)

Each instrument on an GPIB must have a unique instrument address

between decimal 0 and 30. The device address passed with the program

message must include not only the correct instrument address, but also the

correct interface select code.

DEVICE ADDRESS = (Interface Select Code * 100) + (Instrument Address)

For example, if the instrument address for the oscilloscope is 4 and the

interface select code is 7, when the program message is passed, the routine

performs its function on the instrument at device address 704.

For the oscilloscope, the instrument address is typically set to

Oscilloscope Device Address

The examples in this manual and in the online Agilent 54600-Series

Oscilloscopes Programmer’s Reference assume the oscilloscope is at device

address 707.

See the documentation for your GPIB interface card for more information on

select codes and addresses.

Programming over GPIB

Communicating over the bus

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Agilent Technologies HP 54601B Specifiche Pagina 38