31
/
99
Figure 6-5
Based on sinθ=A/B or C/D, θ is the phase angle between channels, the definition of A, B, C, D see Figure
6-5. So the phase angle is
θ
=
±
arcsin
（
A/B
）
or
θ
=
±
arcsin
（
C/D
）
.
If the main spindle of elliptical within I, III quadrant, then the acquired phase angle should at I, IV quadrant,
that is within
（
0
～π
/2
）
or
（
3
π
/2
～
2
π）
.
If the main spindle of elliptical within II, IV
,
then the acquired phase angle should within
（π
/2
～π）
or
（π～
3
π
/2
）
.
In addition, if the frequency or phase difference of the two signal to be measured are integer times,
calculating the frequency and phase relation of the two signals based on the Figure 6-6.
Figure 6-6
6.5 Multi-Scopes
In multi-scopes, CH1, CH2 can be set to different timebase scale, so that signals of different frequency in multiple
channels can be observed at the same time. Enter Multi-Scopes interface via horizontal menu.
Switch Multi-scopes to enter this mode, as shown in Figure 6-7. Each channel can be set to different frequency,
amplitude and waveform and all can be stable generated in multi-scopes.
In multi-scopes, it can turn on, off, activate channel. Timebase scale, volts/div, horizontal displacement, vertical
displacement, trigger setting of channel can be adjusted independently.
Multi-Scopes supports split screen (upper and down screen) for observing waveform, as shown in Figure 6-7.
