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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
:
w r t 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
~~
E 3
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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