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HP-IB
STATUS
Indicators
When the analyzer is connected to other instruments over HP-IB, the HP-IB STATUS indicators
in the instrument state function block light up to display the current status of the analyzer.
R
=
remote operation
L = listen mode
T = talk mode
S = service request (SRQ) asserted by the analyzer
System Controller Mode
me
~~~~~~~~~~~~~:
softkey
activates
the
system
controller
mode.
men
in
this
mode,
i
;:...
.
:~:.&.:.
.?....:<bL:i.:...
:.;..l&..:
the analyzer can use HP-IB to control compatible peripherals, without the use of an external
computer. It can output measurement results directly to a compatible printer or plotter, store
instrtmrent
states using a compatible disk drive, or control a power meter for performing
service routines. The power meter calibration function requires system controller or pass
control mode.
lhlker/Listener
Mode
,, .,
. . . . . . . . . . . . . . . . ...>
./
..:...........
*
.,
i.
..2.il
The
~~~~~~~~~~:
softkey
activates the talker/listener mode, which is the mode of
operation most often used. In this mode, a computer controller communicates with the
analyzer and other compatible peripherals over the bus. The computer sends commands or
instructions to and receives data from the analyzer. All of the capabilities available from the
analyzer front panel can be used in this remote operation mode, except for control of the
power line switch and some internal tests.
Pass Control Mode
,_,./,,,
_
..j
,,.
_
;;
.,.,.,.,.,.,...,.,...
i..i...
iiiii.i.iii;;;~~;ii
_
;
.,,,
/;;//,LC>>;“’
....
The
~~~~~~~~~~~~~j
softkey
activates the third mode of HP-IB operation: the pass control
:~~~~...~~~~~~~~~:..:.1...;...:.,~...,;~~
.A......
.:..:::::&i
.
“.a..r
mode. In an automated system with a computer controller, the controller can pass control of
the bus to the analyzer on request from the analyzer. The analyzer is then the controller of the
peripherals, and can direct them to plot, print, or store without going through the computer.
When the peripheral operation is complete, control is passed back to the computer. Only one
controller can be active at a time. The computer remains the system controller, and can regain
control at any time.
Preset does not affect the selected controller mode, but cycling the power returns the analyzer
to talker/listener mode.
Information on compatible peripherals is provided in Chapter 11, “Compatible Peripherals.
n
Address Menu
ms
menu
citn
be
accessed
by
pressing
the
:~~:~~~~~.~
softkey
within
the
HP-IB
menu.
./::::
;..::
::.;..i:
.::::::
In communications through the Hewlett-Packard Interface Bus (HP-IB), each instrument on the
bus is identified by an HP-IB address. This decimal-based address code must be different for
each
instrument
on the bus
This menu lets you set the HP-IB address of the analyzer, and enter the addresses of peripheral
devices so that the analyzer can communicate with them.
6-112
AppiicationandOperationConcepts