HP 54501A - Page 181

MASK
MASK
command/query
The :DISPLAY:MASK
command
inhibits
the
instrument
from
writing
to
selected
areas
of
the
screen.
Text
sent
over
the
HP-IB
with
the line
and
string
commands,
or
the
SYSTEM:DSP
command
is
not
affected
by
this
command.
The
purpose
of
the
command
is
to
allow
HP-IB
text to
be
written
anywhere
on
screen
and
to
prevent
the
instrument
from
overwriting
the
text
through
its
normal
operation.
The
mask
parameter
is
an
8-bit
integer
in
which
each
bit
controls
writing
to
an
area
of the
screen.
A
zero
inhibits
writing
to
the
area
represented
by
the
bit,
and
a
1
enables
writing
to
that
area.
The
MASK
query
returns
the
current
value
of
the
MASK.
Command
Syntax:
:Dispiay:MASK <
value
>
Where:
<
value
>
::
=
0
to
255
(integer
•
NR1
format)
Example:
OUTPUT
707;":DISPLAY:MASK
67"
The
previous example
enables
writing
to
the
Menu
Area
(bit
6),
the
Status
Line
(bit
1),
and
the
Advisory
Area
(bit
0).
Query Syntax:
:Dispiay:MASK?
Return
Format:
[:Dispiay:MASK]
<value>
<NL>
Where:
<
value
>
::
=
0
to
255 (integer
•
NR1
format)
Example:
DIM Msk$[30]
OUTPUT
707;":DISP:MASK?"
ENTER
707;
Msk$
PRINT Msk$
Display
Subsystem
11-12
HP
54501A
Programming