ITech IT-M3900C Series User Manual page 156

How to Use
When pin 2 is set to default Ps function, pin 2 will output high or low level based
on whether the instrument is under protection or not. Under normal conditions
(Not under protection), and when pin 2 is under default setting (Not-Invert), pin
2 outputs high level; when the instrument is under protection, pin 2 outputs low
level.
1. Refer to the figure below to connect pin 2 to the external oscilloscope.
When pin 2 is set to Invert, the output level is completely opposite.
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Not-Invert: No
Ps This default function means the output
level from pin 2, which displays that
whether the instrument is under pro-
tection or not.
Input Pin 2 receives the level signal from
the outside.
Output Pin 2 sends the digital signal (1, 0,
PWM) to the outside.
True By default (Not-Invert), the
output digital signal is 1 (i.e.
low level), and in the case of
Invert, the output is high
level.
False By default (Not-Invert), the
output digital signal is 0 (i.e.
high level), and in the case of
Invert, the output is low level.
PWM Digital signal of PWM.
PWM Freq
PWM Duty
Basic Operation
Frequency
Duty cycle
145