Agilent Technologies 8712ET Programmer's Manual page 37

NOTE
Passing Control
Passing Control
Passing Control
When an external controller is connected to the analyzer with a GPIB
cable, passing control may be needed to control devices such as printers
and plotters that are also connected on the GPIB. For some operations
the active controller must pass control to the analyzer. When the
analyzer completes the operation, it automatically passes control of the
bus back to the external controller.
An example program, PASSCTRL, demonstrates passing control to the
analyzer. In this example program, control is passed so the analyzer can
control a printer for hardcopy output. See the Example Programs Guide.
Pass Control is not needed to control peripherals connected to the serial,
parallel, or LAN ports.
For smooth passing of control, take steps that ensure the following
conditions are met:
• The analyzer must know the controller's address so it can pass
control back.
• The controller must be informed when the analyzer passes control
back.
3-2 Programmer's Guide