HP 8712C, User Manual, Page: 338 / 559

Automating Measurements
Controlling Peripherals
The port has five TTL input signals, used for determining
the printer’s status, which can be read. The signals and the corresponding
data bits and pins are shown in the following table:
Pin Bit
1 0
1 1
1 2
1 3 0 3
1 5
Name
Acknowledge
Busy
O u t o f
On Line
Printer Error
Your custom interface circuit can drive these signals, and they can be read
using any of these commands:
SCPI commands:
OUTPUT
ENTER
command:
P a r a l l e l - i n
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