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Operation
4.3.2
Front panel control
Closing
and opening
channels
A
matrix
crosspoint
is
closed
form
the front
panel
by
simply
keying
in the
channel assignment
and
pressing
CLOSE.
For example,
to close
Row
3,
Column
4
cros-
spoint
of
a matrix card
installed in slot
2,
key
in
the
fol-
lowing
channel
list
and
press
CLOSE:
SELECT
CHANNELS
2!3!4
The
above
closed
channel can be
opened by
pressing
OPEN
or
OPEN
ALL. The
OPEN
key opens
only the
channels
specified in
the
channel
list,
and
OPEN ALL
opens
all
channels.
The
following display
is
an example
of a
channel
list
that consists of several channels:
SELECT
CHANNELS
2!1!1, 2!1!3,
2!2!l-2!2!5
Notice
that
channel
entries are
separated
by
commas
{,).
A
comma
is
inserted
by
pressing
ENTER
or the
right
cursor
key
{>
)•
The
channel range
is
specified
by
us-
ing the
hyphen
{-)
key
to
separate the
range
limits.
Pressing
CLOSE
will close
all
the
channels
specified
in
the
channel
list
Pressing
OPEN
(or
OPEN
ALL)
will
open
the channels.
Scanning
channels
Matrix
crosspoints are
scanned
by
creating a scan
list
and
configuring the
Model
7001
to
perform
a
scan.
The
scan
list
is
created in
the
same manner
as a
channel
list
(see
Closing
and Opening
Channels).
However,
the
scan
list
is
specified
from
the
"SCAN
CHANNEL"
dis-
play
mode.
(The
SCAN
LIST key
toggles
between
the
channel
list
and
scan
Hst.)
The
following
shows
an
ex-
ample
of
a scan
list:
SCAN CHANNELS
2!1!1, 2!1!3,
2!2!l-2!2!5
When
a scan
is
performed,
the
channels
specified in the
scan
list
will
be scanned
in
the
order
that
they
are pre-
sented
in the
scan
list.
A
manual
scan
can be performed
by
using the
RESET
default
conditions of the
Model
7001.
RESET
is
selected
from
the
SAVESETUP menu
of the
main
MENU. When
RESET
is
performed,
the
mainframe
is
configured
for
an
infinite
number
of
manual
scans.
The
first
press
of
STEP
takes the
mainframe
out
of the
idle
state.
The
next press
of
STEP
will close the
first
channel
specified
in the
scan
list.
Each
subsequent
press
of
STEP
will se-
lect
the
next
channel
in the
scan
list.
4.3.3
IEEE-488 bos operation
Bus
operation
is
demonstrated using
HP
BASIC
4.0.
The programming
statements
assume
that the
primary
address
of the
mainframe
is
07.
Closing
and opening
channels
The
following
SCPI
commands
are
used
to
close
and
open
channels:
:CLOSe
<list>
:OPEN<Hst>IALL
The
following statement
closes
channels
1!1!1,
and
1!1!3
through
l!l!6:
OUTPUT
707;
":dos
(@
im3:lll!6)"
Notice
that
the
colon
(:)
is
used
to
separate the
range
limits.
Either of the
following statements
will
open
channels
1!1!1,
and
111I3
through
1!1!6:
OUTPUT
707;
":open
(@
lilll,
1!1!3:1!1!6)"
OUTPUT
707;
":open
all"
Scanning channels
There
are
many commands
associated
with sccuming.
However,
it
is
possible
to
configure a scan using
as
lit-
tle
as
four
commands.
These
commands
are
listed
as
follows:
4-4
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