Fnirsi 1013D Product Instructions page 10

Analysis of common problems
1: Why can't I turn on the phone after receiving it?
A: Maybe after the final test is completed, the tester forgets to shut down and puts it
in the inventory until it runs out. After receiving the goods, it runs out of power. Please
use USB for half an hour before powering on. Do not use computer USB for charging.
Computer USB If the power is too low, you will be dissatisfied. Use the original
charger.
2: Why is there no waveform in the test, and there is only one line on the screen?
Answer: Please check whether the pause has been pressed. If not, press the [Auto
Adjust] button once. If not, it may be that the signal source does not have a signal
output, or the probe wire is short-circuited or disconnected. Please check with a
multimeter. Whether the probe and signal source are normal
3: Why is the voltage value data 0?
Answer: Please adjust the vertical sensitivity and time base (sampling rate), or press
the [AUTOSET] screen to display at least a clear and complete periodic waveform, and
the top and bottom of the waveform should be completely displayed on the screen,
without cutting the top. Voltage data is correct
4: Why is the frequency value data 0?
Answer: First of all, you need to make sure that the trigger mode is Auto. If it is still O
in Auto mode, you need to press the [AUTOSET] button once. At least one clear and
complete periodic waveform is displayed on the screen, and the waveform is to be
triggered. (The green arrow indicates that the position is between the top and bottom
of the waveform. It is fixed and does not shake.) The data of the frequency value is
correct.
5: Why is the duty cycle 0?
Answer: First of all, you need to ensure that the trigger mode is Auto. If it is still O in
Auto mode, the trigger may not be adjusted between the waveforms. After the trigger
line is adjusted between the waveforms, the waveform will be fixed. The duty cycle
data is correct after at least 1 clear periodic waveform is displayed
6: Why are the AC coupled and DC coupled waveforms the same?
Answer: If the input signal is a symmetrical AC signal (signal output by the signal
generator), the waveform is the same whether it is AC coupling or DC coupling. If it is
an asymmetric AC signal or a DC pulsating signal, the waveform is only when the
coupling is switched. Will move up and down
7: Why does the waveform jump up and down when I test the signal? Ica n' t see
any waveform but only see multiple lines jumping up and down?