Pulsewidth Measurement; Phase Measurement - Goldstar OS-7020 Service Manual

6-5 Pulsewidth Measurement
The basic pulsewidth measurement procedure is as follows ;
1.
Display the pulse waveform vertically
so
that the distance
between the top part of the
pulse
waveform and the hori-
zontal center line of the graticule may be equal to the
distance between the bottom part of the pulse and the
horizontal center line as shown in Fig.
6-6
90 ...
•• • "4•.
••J•• ••
I.
""
►
\
I \
rz· · ·
r · r ·
T · T · ·
r · ·
r · ·
r
1 1 1
I
Fig 6-6
Pulsewidth measurement
2. Set the TIME/DIV switch in order to make the easy observa-
tion of the signal.
3. Read the distance between c~nters of rising and falling
edges, i.e., the distance between two points at which
pulse edges cross the horizontal center line of the
graticule.
6-6 Phase Measur~ment
The measurement of phase difference between two signals,
there are the following two methods;
The first one is the Lissajou's pattern method by using
I
the instrument as an X-Y scope. The phase difference of
16