HP 3468A - Page 47

Example 3. Power-on SRO
This
example
shows
how
the
power-on
SRQ
feature
can
be
used
with
the
-hp-
Model
41C/41CV
calculator.
The
Power-on
SRQ
bit
is
used
to
signal
the
calculator
that a power
outage
has occurred
for the 3468A.
Without
turning
the
3468A
off,
locate
the
bank
of
switches
just
below
the
HP-IL
connector,
on
the
rear
panel
of
the
multimeter.
Set
switch
3
to
the
“UP”
position.
Again, execute the INSTAT command.
Keystrokes HP 41 Display Comments
XEQ)
[ALPHA]
INSTAT
[ALPHA]
1.0000
The
calculator
display
shows
“1” for data ready.
w@
07
NO
Flag
O7
(bit
7)
is
not
set.
Now,
turn
the
3468A
off
and
then
on
again.
Notice
the
SRO
annunciator
in
the
display.
ALPHA]
INSTAT
[ALPHA
1.0000
_
Data
is
still
ready.
|
07
YES
Flag
07
is
set
(bit
7)
because
a
power-on
reset
occurred.
Return switch 3 to its “DOWN” position.
| SELECT
Cammeny
Comments
The
SELECT
command
is
used
to
determine
which
HP-IL
device
will
be
the
selected
device
in
the
loop
-
that
is,
which
device
will
receive
the
information.
The
X-register
in
the
calculator
must
contain
the
address
of
the
device
to
be
selected
before SELECT is executed.
42