Using
Key
Codes
Using key codes allows remote control of the analyzer keys and can be
used as an alternative to using other
HP-ES
commands. This may be
useful, but it is a highly recommended programming practice to use the
HP-IB command mnemonic appropriate for the function desired.
Figure
l-6.
Key Codes
When using key codes, the following notes must be taken into
consideration:
Note 1:
An “invalid key” is reported with a 63.
Note 2:
OUTPKEY
j
outputs the key code of the last key pressed.
This command reports a knob turn as a -1.
Note 3:
KOR’?;
outputs the last key code or knob count. If the reply
is positive, it is a key code. If it is negative, then set bit 15
equal to bit 14, and the resulting two byte integer is the RPG
knob count. It can be either positive or negative. There are
about 120 counts per turn.
1-62
HP-IB
Progr
amming and Command Reference Guide
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