ADLINK PCI-8164 - Manual (Page 81)

Operation Theory 69
gram shows the output waveform of positive (+) commands and
negative (-) commands.
A/B Phase Pulse Output Mode (A/B phase Mode)
In this mode, the waveform of the OUT and DIR pins represent A-
phase and B-phase pulse output, respectively. Pulses output from
the OUT pin leading makes the motor move in positive direction,
whereas pulse output from the DIR pin leading makes the motor
move in negative direction. The following diagram shows the out-