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Operation
Table
4-1
Status
of
slave
unit controls
Control,
indicator,
or
connector
Status
POWER
active
CROSSPOINT
DISPLAY
Group:
MEMORY
key
and
LED
only
LED
active
RELAYS
key and
LED
only
LED
active
CROSSPOINT
DISPLAY
active
MODIFIED LED
COPY
DISPLAY
™
MEMORY
inactive
COPY
DISPLAY
—
RELAYS
inactive
AUTOMATIC
key and
LED
only
LED
active
SCROLL
A
and
SCROLL
y
inactive
MEMORY
Group:
INSERT
inactive
DELETE
inactive
menu
key and
LED
inactive
SWITCHING
Group:
SETfLINGTIME
inactive
MAKE/BREAK
inactive
BREAK/MAKE
inactive
LOCAL
inactive
TRIGGER
Group;
ENABLE
key
and
LED
only
LED
active
source
inactive
MANUAL
inactive
Data
Entry
(A-H,
0-9)
inactive
cancel,
enter
inactive
RESET
inactive
clear, open,
CLOSE
inactive
Alphanumeric
Display
active
(Note
1)
TALK,
LISTEN,
REMOTE
LEDs
inactive
Crosspoint Display
LEDs
active
MAKE/BREAK
and
BREAK/MAKE
active
Row LEDs
LIGHT PEN
inactive
Rear
Panel Connectors:
MASTER/SLAVE
IN
active
MASTER/SLAVE
OUT
active
EXTERNAL
TRIGGER
INPUT
inactive
MATRIX
READY OUTPUT
active
(Note
2)
REALY
TEST
not
used
DIGITAL
I/O
inactive
(Note
3)
IEEE-488
INTERFACE
not
used
Notes:
1
.
Messages
only.
2.
Timing
accuracy
not guaranteed.
3.
Outputs
set to
all
low.
4.9.5
IEEE-488
bus
address
The Model
707A
communicates
over
the
IEEE-488 bus
through
the
rear panel
connection
shown
in
Figure 4-13.
When
connected
to
a bus
controller,
instrument operating
modes
can
be
programmed. Note
that
IEEE-488
common
is
always grounded.
IEEE-488
interface
function
codes
are
marked
adjacent
to
the connector.
(fS
(T^
SHI
AH1
T6
TEO
L4
LEO
SRI
BL1
PRO
DC1
DTI
El
CO
Figure 4-13
IEEE-488
bus connector
A
menu
item
is
used
to set
the
primary
address of
the
Model
707A
for
bus
operation.
The
primary
address of
the
Model
707
A
is
factory set
to 18,
but
it
may
be
set to
any
value
between 0 and 30
as
long
as
address
conflicts
with other
instruments or
the
bus
controller are
avoided.
To
check
the
present
primary
address or
to
change
to
a
new
one,
perform
the
following procedure:
1
.
Press
the
MENU
key
until
the current
primary address
is
displayed.
For example,
if
the
instrument
is
set
to pri-
mary
address
18, the
following
message
is
displayed:
IEEE-488
18
2.
Press
CANCEL
to
retain the
present address
and
exit
menu
mode.
3.
To
change
the
primary
address,
use
the
data entry
keys
to
key
in
a
new
value,
then
press
ENTER.
This action
will also exit
menu
mode.
The new
address
will
be
stored
in
memory
so
that the
instrument
powers up
to
that
address.
4-17
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