Model 8901B
Service
HP
9825A
(HPL)
0:
rem 714;llo 7
60.0
Key
Scan.
The keyboard
is
scanned and
a
key code
is
displayed and output to the HP-IB. The
key codes are shown in Figure 8B-3.
HP
85A
(BASIC)
10
REMOTE
714
To use the Key Scan Special Function, remove the instrument
top
cover. Key in
60.0
SPCL
then jumper A13TP3
(INT)
to
A13TP1
(GND)
on the
A13
Controller Assembly. Press the
front-panel keys and observe the display.
If
two
or
more keys are pressed simultaneously, the
display shows the code corresponding to the
first
one
found
in its normal scan. See Service
Sheet
25.
Two
simple programs
for
displaying the key codes
on
a
computing controller are shown in
Table 8B-3. Removal
of
the top and bottom covers is unnecessary. The Modulation Analyzer
is
assumed to have HP-IB address 14,
1
:
wrt
714,
"60.
OSP"
2:
red
714,A
3:
dsp
A
4:
jmp
-2
5:
end
(301
20
LOCAL
LOCKOUT
7
30
OUTPUT
714
;
"60.
OSP"
40
ENTER 714
50
DISP
A
60
GOT0
40
~~
E3
NO
KEY
PRESSED:
99
Figure
88-3.
Key
Codes
for
Key
Scan
(Service
Special
Function
60)
Table
8B-3.
Key
Scan
Programs
8B-12 Special finctions
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