HP 8753D - HP-IB Operation

HP-IB Operation
The
Hewlett-P
ackard
Interface
Bus (HP-IB)
is Hewlett-P
ackard's hardware
,software
,
documentation,
and
support
for
IEEE
488.2
and IEC-625
worldwide standards
for interfacing
instruments
.
This
interface
allows
you
to operate
the analyzer
and peripherals
in two
methods:
by
an
external
system
controller
by
the
network
analyzer
in system-controller
mode
Device
Types
The
HP-IB
employs
a
party-line
bus
structure
in
which
up
to
15
devices
can
be
connected
on
one
contiguous
bus
.
The
interface
consists
of
16
signal
lines
and
8
ground
lines
within
a
shielded
cable
.
With
this
cabling
system,
many
dierent
types
of
devices
including
instruments
,
computers
,
power
meters
,
plotters
,
printers
,
and
disk
drives
can
be
connected
in
parallel.
Every
HP-IB
device
must
be
capable
of
performing
one
or
more
of
the
following
interface
functions:
T
alker
A
talker
is
a
device
capable
of
transmitting
device-dependent
data
when
addressed
to
talk.
There
can
be
only
one
active
talker
at
any
given
time
.
Examples
of
this
type of
device include:
power
meters
disk
drives
voltmeters
counters
tape
readers
The
network
analyzer
is
a
talker
when
it
sends
trace
data
or
marker
information over
the
bus
.
Listener
A
listener
is
a
device
capable of
receiving device-dependent
data
over
the
interface
when
addressed
to
listen.
There
can
be as
many as
14
listeners
connected
to
the
interface
at
any
given
time
.
Examples of
this type
of device
include:
printers
power
supplies
signal
generators
The
network analyzer
is a
listener when
it is
controlled
over
the
bus
by
a
system
controller
.
Controller
A controller is dened as a device capable of:
1. managing the operation of the bus
2. addressing talkers and listeners
There can be only one active controller
on the interface at any time
. Examples of controllers
include desktop computers
, minicomputers
, workstations
,
and the network analyzer
.Ina
multiple-controller system, active control can be passed between controllers, but there can
only be one system controller connected to the interface. The system controller acts as the
master and can regain active control at any time. The analyzer is an active controller when it
plots, prints, or stores to an external disk drive in the pass-control mode. The analyzer is also a
system controller when it is operating in the system-controller mode.
Compatible Peripherals 11-15