HP 8753D - Page 411

The
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TITLE
TO
PERIPHERAL
sequencing
command
(in
the
Sequencing
Special Functions
menu)
sends the
HP-GL command
string
to
the
analyzer's
HP-GL
address
.
The
address
of
the
analyzer's
HP-GL graphics
interface is
always
oset
from
the
instrument's
HP-IB
address
by
1:
If
the
current
instrument
address
is
an
even
number:
HP-GL
address
=
instrument
address
+1.
If
the
current
instrument
address
is
an
odd
number:
HP-GL
address
=
instrument
address
0
1.
Special
Commands
Two
HP-GL
commands
require
special
consideration
when
used
in
local
operation
or
in
sequencing.
These
are
explained
below:
Plot
absolute
(HP-GL
command:
P
A)
The
syntax
for
this
command
is
P
Ax,y
where
x
and y
are screen
location coordinates
separated
by
a
comma.
Label
(HP-GL
command:
LB)
The
syntax
for
this
command
is
LB[text][etx].
The
label
command
will
print
ASCII
characters
until
the
etx
command
is
seen.
The
etx is
the ASCII
value 3
(not
the
ASCII
character
3).
The
analyzer
title
function
does
not
have
the ASCII
value 3,
so the
instrument allows
the
LB
command to
be
terminated
with
the
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END OF
LABEL
command
(accessed
by
pressing
4
DISPLA
Y
5
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MORE
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TITLE
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MORE
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END
OF
LABEL
).
Entering
Sequences Using
HP-IB
Y
ou
can create
a
sequence
in
a
computer
controller
using
HP-IB
codes
and
enter
it
into
the
analyzer
over
HP-IB
. This
method
replaces
the
keystrokes
with
HP-IB
commands
.
The
following
is
a
procedure
for entering
a
sequence
over
HP-IB:
1.
Send
the
HP-IB command
NEWSEQx where
x
is
a
number
from
1
to
6.
2.
Send
the
HP-IB
commands
for
the
measurement.
3.
T
erminate
with
the
HP-IB
command
DONM
(done
modify).
Reading
Sequences Using
HP-IB
An
external
controller
can
read
the
commands
in
any
sequence
(in
HP-IB
command format).
Send
the
following
command
to
the
analyzer:
OUTPSEQx where x is a number from 1 to 6.
Allocate an adequate amount of string variable space in the external controller and execute an
ENTER statement.
6-144 Application and Operation Concepts