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IEEE'488 Programming
NOTE
To
minimize
interference
caused by
elec-
tromagnetic
radiation,
use only shielded
IEEE-488
cables.
The Model
7007-1 and
7007-2
shielded
IEEE-488
cables
are
available
from
Keithley Instruments.
Connect
the
cable
to
the
Model
707
A
as follows:
2.
Tighten screws
securely,
but
do
not overtighten
them.
(Overtightening
can break
the connector.)
3.
Add
additional
connectors
from
other instruments, as
required.
4.
Make
sure the other
end
of
the
cable
is
properly
connect-
ed
to
the
controller.
Some
controllers
have
an
IEEE-488
type connector,
while
others
do
not.
Consult
the instruc-
tion
manual
of your
controller for the
proper
connecting
method.
I
.
Line up
the
connector
on
the
cable
with
the
connector
on
the rear
panel of
the instrument.
Figure 5-4
shows
the
IEEE-488
connector
location.
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NOTE
The
IEEE-488
bus
is
limited
to
a
maxi-
mum
of
15 devices, including the
control-
ler.
Also, the
maximum
cable
length
is
limited
to
20
meters, or
2 meters
multi-
plied
by
the
number
of
devices,
whichever
is
less.
Failure
to
observe
these
limits
may
result
in erratic
bus
operation.
In master/slave configurations, only the
master
unit
is
connected
to
the
IEEE-488
bus.
If
slave
units
are also connected,
er-
ratic
bus operation
results.
Custom
cables
may
be
constructed
by
using
the contact
assignments
listed in
Table 5-2 and
shown
in
Figure
5-5.
Figure 5-4
IEEE-488
connector
location
5-4
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