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2
3
7：Time base adjusted to 20uS
8：Adjust the trigger yellow arrow position to about 1 large grid distance above
the left yellow arrow position
9：At this time, use the remote control to send a signal to the infrared receiver,
and a waveform will appear on the oscilloscope
With sensors(Temperature , humidity, pressure, Hall, etc.)
amplifier circuit me asurement
Gear selection:Sensor signals are g enerally relatively weak,About a few
millivolts,This small signal cannot be detected di rectly with an oscilloscope.This
kind of sensor motherboard has a signal amplification part,The oscilloscope can
measure this amplified signal,
Just use 1X gear (both probe and oscilloscope are set to 1X gear)
1：First set the oscilloscope to Auto trigger mode
2：Set the oscilloscope to 1X gear
3：The oscilloscope is set to DC coupling mode
4：Plug in the p robe,And turn the switch on the probe handle to the 1X position
5：Connect the probe clip to the ground terminal of the sensor main board
(negative power supply),Find the output terminal of the amplifying part and
connect the probe to this output terminal
6：Adjust the vertical sensitivity to 50mV gear
7：Adjust the time b ase to 500mS to enter the large time base slow sweep mode
8：If the yellow signal line appears at the top, you need to reduce the vertical
sensitivity.It is 100mV, 200mV, 500mV and so on,When the updated signal on
the right is not at the top(Generally the best in the middle o f the upper and
lower),Now you can start to detect the signal received by this sensor.