Model
864
2A/B
Operation
Output
Display
Informa
tion
...
The
Signal
Generator
will
output
the
display
information
when
it
is
addressed
to
talk
and
is
not
configured to
output
any
other
data.
1.
The first time the Signal
Generator
is
addressed to talk, it will
output
the
actual
display
in
alphanumeric
characters
(maximum
of
74 characters). (The string length
of
the
alphanumeric
display will always be
greater
than
or equal to
25
characters.)
2.
The second
time
the Signal
Generator
is
addressed to talk,
it
will
output
a number,
representing
the
displayed cursor positions,
in
a binary, weighted sum. (This string
length
will always
be
less
than
25 characters.)
3.
The
third
time
the
Signal
Generator
is addressed to talk,
it
will
output
a number,
representing the displayed annunciators, in a binary, weighted sum. (This string length
will also always be less
than
25 characters.)
Each
item
in
the sequence above will be
output
agam
In
the
same sequence
when
the
Signal
Genera
tor
is
further
addressed to talk.
Following
is
a programming example
in
BASIC for
outputting
display
information:
Output
the
current
display
of
the Signal
Generator
(address
19),
including
the
cursor
position
and
annunciators. (Assuming a
function
was executed to enable you
to
get
the
display you want.)
10
DIM
A$
[74]
20
ENTER
719;
A$
30
ENTER
719; C
40
ENTER
719; N
Define
string
big
enough
to
handle
maximum
display
Display
String
Cursor
Value
Annunciator
Value
The
Signal
Generator
is
initialized
to
output
the
alphanumeric
display string first,
whenever
you execute an
instrument
function
(for example, set AM or frequency). (When
you
are
using
Output
Display to
output
messages,
the
actual
front-panel
display will
be
output,
not the message code
number
that
would be
output
if
you used "OC", "OE",
or
"OHIO.)
The
binary
weight
of
the cursor positions are:
2
1
=2
for
the
left
most cursor, 2
2
=4
for
the
next cursor to
the
right, 2
3
=8
for
the
next
cursor to the right,
...
, 2n
for
the
nth
cursor position
from
the
left,
...
, 2
25
= 33
554
432
for
the
right
most cursor.
The
binary
weight
of
the
annunciators
are provided
in
the following Ta ble 3 -
5.
3-21
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