Fnirsi 2C23T Manual página 58

①Firstly, set the oscilloscope to Auto trigger mode (default to Auto trigger mode
after startup)
②Set the oscilloscope to 1X gear (default to 1X gear after startup)
③Set the oscilloscope to AC coupling mode
④Insert the probe and move the switch on the probe handle to 1X position
⑤Ensure that the amplifier is turned on and working, and is outputting an audio
signal
⑥Connect the probe clamp and probe to the two output terminals of the power
amplifier, without distinguishing between positive and negative poles
⑦Press the [AUTO] button once, and the waveform output by the power
amplifier will be displayed. If the waveform after AUTO adjustment is too
small or too large, you can manually adjust the waveform size in zoom mode.
9. Automotive communication signals/bus signals measurement
Communication signals used in automobiles are generally lower than
20V, and the highest test voltage for 1X gear is 80V. Therefore, using 1X
gear for testing automotive communication signal signals is sufficient
(both the probe and oscilloscope are set to 1X gear)
①Firstly, set the oscilloscope to Normal trigger mode (default to Auto trigger
mode after startup). The Norma trigger mode is specifically used to measure
non periodic digital signals, and if you use Auto trigger mode, you cannot
capture non periodic signals.
②Set the oscilloscope to 1X position (default to 1X position after startup).
③Set the oscilloscope to AC coupling mode.
④Insert the probe and move the switch on the probe handle to the 1X position.
⑤Connect the probe clamp and probe to two signal wires of the communication
line, regardless of positive or negative. If there are multiple signal wires, you
need to determine the signal wires in advance or try selecting two of them
multiple times to test.
⑥Ensure that there is a communication signal on the communication line at this
time.
⑦Adjust the vertical sensitivity to the 50mV gear.
⑧Set the time base to 20uS.
Gear selection
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