Agilent Technologies 4395A - Page 415

GPIB
Bus
Mode
The
analyzer
uses
a
single-bus
architecture
.
The
single
bus
allows both
the analyzer
and the
host
controller
to
have
complete
access
to the
peripherals in
the system.
Figure
A
-22.
Analyzer
Single
Bus
Concept
Two
dierent
modes
are
possible
,
system
controller
and
addressable
.
System
Controller
This
mode
allows
the
analyzer
to
control
peripherals
directly
in
a
stand-alone
environment
(without
an
external
controller).
This
mode can
only be
selected
manually
from
the
analyzer
front panel.
Use this
mode for
operation when
no
computer
is
connected
to
the
analyzer
. Printing
and plotting
use this
mode
.
A
ddressable
This
is
the
traditional
programming mode
,in
which the
computer
is
involved
in
all
peripheral
access
operations
.
When
the external
controller is
connected to
the analyzer
through GPIB
(as shown
in
Figure
A
-22
),
this
mode
allows
you
to
control the
analyzer over
GPIB in
the talker
mode in
order
to
send
data,
and
in
the
listener
mode
to
receive
commands
.
It
also allows
the
analyzer
to
take
or
pass control in order to plot and print.
Setting A
ddresses
In GPIB communications
, each instrument on the bus is identied by an GPIB address
. This
address code
must be unique to each instrument on the bus
. These addresses are not aected
when you
press 4
Preset
5 or
cycle the power
.For more information on how to set the address
,
refer to the description of the 4
Lo cal
5 key in Appendix B \Softkey Reference".
Basic Measurement Theory A-39