Agilent Technologies 4395A - Page 414

GPIB
GPIB
Requirements
Number
of Interconnected
Devices: 15
maximum.
Interconnection
Path/
Maximum Cable
Length:
20
meters maximum
or 2
meters per
device,
whichever
is
less.
Message
Transfer Scheme:
Byte serial/bit
parallel asynchronous
data transfer
using
a
3-line handshake
system.
Data
Rate: Maximum
of 1
megabyte per
second over
limited
distances
with tri-state
drivers.
Actual
data rate
depends
on the
transfer rate
of the
slowest device
involved.
A
ddress Capability:
Primary addresses:
31
talk,
31
listen.
A
maximum
of
1
active
talker and
14 active
listeners
at
one
time
.
Multiple
Controller Capability:
In systems
with
more
than
one
controller
(like
the
analyzer
system),
only
one
can
be
active
at
any
given
time
.
The active
controller
can
pass
control
to
another
controller
,
but
only one
system
controller
is
allowed.
GPIB
Capabilities
of
the
4395A
As
dened
by
the
IEEE
488.1
standard,
the
analyzer
has
the
following
capabilities:
SH1
Full
source
handshake
.
AH1
Full
acceptor
handshake
.
T6
Basic
talker
,
answers
serial
poll,
unadresses
if
MLA
is
issued.
No talk-only
mode
.
TE0
Does
not
have
extended
address of
talker
.
L4
Basic
listener
,
unadresses
if MT
Ais
issued.
No
listen-only
mode
.
LE0
Does
not
have extended
address of
listener.
SR1
Complete
service
request
(SRQ)
capabilities.
RL1
Complete remote/local
capability
including
local
lockout.
PP0
Does not
respond to
parallel
poll.
DC1
Complete device
clear.
DT1 Responds to a group execute trigger
.
C1, C2, C3, C4
System controller capabilities in system controller mode
.
C11 Pass control capabilities in addressable mode
.
E2
Tri-state drivers
.
A-38 Basic Measurement Theory