User Manual
25
(3)
Select
DC
in the right menu. Both DC and AC components of the signal are passed.
(4)
Select
AC
in the right menu. The direct current component of the signal is blocked.
2.
To adjust the probe attenuation
For correct measurements, the attenuation coefficient settings in the operating menu of
the Channel should always match what is on the probe (see "
" on P12). If the attenuation coefficient of the probe is 1:1, the
menu setting of the input channel should be set to X1.
Take the Channel 1 as an example, the attenuation coefficient of the probe is 10:1, the
operation steps are shown as follows:
(1)
Push the
CH1
button to show the CH1 SETUP menu.
(2)
Select
Probe
in the bottom menu. Select
Attenu
in the right menu, turn the
M
rotary control to set it as
10×
.
3.
To measure current by probing the voltage drop across a resistor
Take the Channel 1 as an example, if you are measuring current by probing the voltage
drop across a 1Ω resistor, the operation steps are shown as follows:
(1)
Push the
CH1
button to show CH1 SETUP menu.
(2)
Select
Probe
in the bottom menu. In the right menu, set
MeasCurr
as
YES
, the
A/V radio menu will appear below. Select it; turn the
M
rotary control to set the
Amps/Volts ratio. Amps/Volts ratio = 1/Resistor value. Here the A/V radio should
be set to 1.
4.
To invert a waveform
Waveform inverted: the displayed signal is turned 180 degrees against the phase of the
earth potential.
Taking the Channel 1 for example, the operation steps are shown as follows:
(1)
Push the
CH1
button to show the CH1 SETUP menu.
(2)
Select
Inverted
in the bottom menu, switch to
ON.
the waveform is inverted. Push
again to switch to
OFF,
the waveform goes back to its original one.
5.
To set bandwidth limit
When high frequency components of a waveform are not important to its analysis, the
bandwidth limit control can be used to reject frequencies above 20 MHz.
Taking the Channel 1 for example, the operation steps are shown as below:
(1)
Push the
CH1
button to show CH1 SETUP menu.
(2)
Select
Limit
in the bottom menu.
(3)
Select
Full
band
in the right menu. The high frequency of the signal will be
allowed to pass.
(4)
Select
20M
in the right menu. The bandwidth is limited to 20 MHz. The
frequencies above 20MHz will be rejected.
Summary of Contents for MP720021
Page 1: ...i Digital Storage Oscilloscope 100MHz Model MP720025...
Page 5: ...v Appendix B General Care and Cleaning 147 Appendix C Battery Using Guide 148...
Page 27: ...User Manual 22 Control the vertical cursor line Switch to select the lines...
Page 36: ...User Manual 31 Figure 4 1 Hamming window Figure 4 2 Rectangle window...
Page 37: ...User Manual 32 Figure 4 3 Blackman window Figure 4 4 Hanning window...
Page 38: ...User Manual 33 Figure 4 5 Kaiser window Figure 4 6 Bartlett window...
