User`s manual

26 Chapter 1
O:\Manuals\E6380A_Progguid\Book\Usehpib.fm
Using HP-IB
Overview of the Test Set
External Automatic Control Mode
In External Automatic Control mode the Test Set’s operation is
controlled by an external controller connected to the Test Set through
the HP-IB interface. When in External Automatic Control mode the
Test Set’s internal configuration is the same as in Manual Control Mode
with two exceptions:
1. Configuration and setup commands are received through the
external HP-IB interface, select code 7, rather than from the
front-panel keypad/rotary knob.
2. The MEASure command is used to obtain measurement results and
DUT data through the external HP-IB interface.
Figure 1-1 on page 28 shows how information is routed inside the Test
Set in Manual Control mode. Figure 1-1 also shows that certain Test
Set resources are dedicated to the IBASIC controller (PC Card, internal
ROM, Serial Ports 10 and 11) and are not directly accessible to the user
in Manual Control Mode. In addition, Figure 1-1 shows that Serial Port
9 and Parallel Printer Port 15 are accessible as write-only interfaces for
printing in Manual Control mode. These same conditions are true when
in External Automatic Control mode. If the user wished to access these
resources from an external controller, an IBASIC program would have
to be run on the Test Set from the external controller.