Fnirsi 1013D Product Instructions page 13

power on), Auto trigger mode is used to test the periodic signal (DC voltage is a
periodic signal)
2: The oscilloscope is set to the corresponding position (the default is 1X position
after booting)
3: The oscilloscope is set to DC coupling mode
4: Plug in the probe, and turn the switch on the probe handle to the corresponding
position
5: Make sure the battery has power or DC voltage has voltage output
6: Connect the probe clip to the battery negative or DC negative, and the probe to the
battery or DC positive
7: Press the [AUTOSET] button once, the DC signal is displayed, and then look at the
average value parameter. Note that the battery voltage or other DC voltages are DC
signals, there is no curve waveform, only a straight line with up and down offset. , And
the peak-to-peak and frequency of this signal are both O
Crystal measurement
Gear selection: It is easy to stop the oscillation after the crystal meets the capacitor.
The input capacitance of the 1X probe is up to 100 — 300pF, the 10X gear is about 10
— 30pF, and the 1X gear is easy to stop the vibration, so it needs to be set to the 10X
gear, that is, Both the probe and the oscilloscope should be switched to the 10X
position (the probe and the oscilloscope are both set to the 10X position)
1: First set the oscilloscope to Auto trigger mode (default is Auto trigger mode after
power on), Auto trigger mode is used to test the periodic signal (the crystal resonance
sinusoidal signal belongs to the periodic signal)
2: The oscilloscope is set to the 10X position (the default is 1X position after booting)
3: The oscilloscope is set to AC coupling mode
4: Plug in the probe and turn the switch on the probe handle to the 10X position
5: Make sure the crystal motherboard is powered on and running
6: Connect the probe clip to the ground of the crystal oscillator main board (the
negative end of the power supply), pull out the probe cap, the needle tip inside, and
touch the needle tip to one of the pins of the crystal
7: Press the [AUTOSET] button once, the waveform of the crystal to be measured is
displayed. If the waveform after the automatic adjustment is too small or too large,
you can press [CTRL] to switch to the zoom button bar, press [V+] and [V-] Manually
adjust the waveform size
PWM signal measurement of MOS tube or IGBT
Gear selection: The voltage of the PWM signal that directly drives the MOS tube or
IGBT is generally within 10V — 20V, and the PWM pre-stage control signal is also
generally within 3 » 20V. The 1X gear can test up to 40V, so the 1X gear is sufficient
for testing the PWM signal. (The probe and oscilloscope are set to 1X).
1: First set the oscilloscope to Auto trigger mode (default is Auto trigger mode after