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10
Using
the
Analyzer's
I/O
P
ort
This
chapter
describes
how
to
use
the
I/O
port
of
the
analyzer
with
the
GPIB
.
F
or
general
operation
of
the
I/O
port,
see
the
4396B
Function
R
eference
manual.
The
I/O
port
on
the
analyzer's
rear
panel
communicates
with
external
devices
(for
example
,
a
handler
on
a
production
line).
Figure
10-1.
I/O
P
ort
The
I/O
port
consists
of
the
following
15
TTL
compatible
signals:
8-bit
output
4-bit
input
3
grounds
The
signals
IN
0
to
IN
3
and
OUT
0
to
OUT
7
can
be
read
and
set
by
GPIB
commands
.
The
Instrument
B
ASIC
commands
READIO(15,0)
and
WRITEIO
15,0
can
directly
control
the
8-bit
I/O
port
without
using
GPIB
commands
.
This
operation
is
faster
than
using
an
GPIB
command.
F
or
more
information
on
these
commands
,
see
the
Using
Instrument
B
ASIC
with
the
4396B
manual.
Using
the
Analyzer's
I/O
P
ort
10-1