Agilent Technologies HP 83711A - Page 103

Front/Rear
P
anel
Connectors
As
many
as
14
HP-IB
instruments
can
be
connected
to
the
synthesizer
(15
total
instruments
in
the
system).
The
cables
can
be
interconnected
in
a
star
pattern
(one
central
instrument
with
the
HP-IB
cables
emanating
from
that
instrument
like
spokes
on
a
wheel),
or
in
a
linear
pattern
(like
boxcars
on
a
train),
or
a
combination
of
the
two
.
There
are
certain
restrictions
that
must
be
followed
when
interconnecting
instruments
.
These
restrictions
are
as
follows:

Each
instrument
must
have
a
unique
HP-IB
address
,
ranging
from
0
to
30
(decimal).
Refer
to
\T
o
Set
the
HP-IB
A
ddress"
in
Chapter
2
for
information
on
setting
the
synthesizer
HP-IB
address
.

In
a
two-instrument
system
that
uses
just
one
HP-IB
cable
,
the cable
length
must
not
exceed
4
meters
(13.2
ft).

When
more
than
two
instruments
are
connected
on
the
bus
,
the
cable
length
to
each
instrument
must
not
exceed
two
meters
(6.6
ft).

The
total
cable
length
between
all
instruments
must
not exceed
20 meters
(65
ft).
Hewlett-P
ackard
manufactures
HP-IB
extender
instruments
(Models
HP
37201A
and
HP
37204A/B)
that
overcome
the
range
limitations
imposed
by
the
cabling
rules
.
These
extenders
allow
twin
pair
cable
operation
up
to 1
km
(3,280
ft),
and
telephone
modem operation
over
any
distance
.
HP
sales
and
service
oces
can
provide
additional
information on
the
HP-IB
extenders
.
5-9