Table of Contents
Advertisement
(4) Video signal observation
Setting the COUPLING ®
switch, to the TV FRAME or TV
LINE position permits selection of vertical or horizontal
sync pulses for sweep triggering when viewing composite
video waveforms.
This makes stable triggering in video signal observations
possible regardless of the TRIG LEVEL control (fj) .
At most points of measurement, a composite video signal
is of the polarity, that is, the sync pulses are negative and
the video is positive. In this case, use " —" SLOPE.
If the waveform is taken at a circuit point where the video
waveform is inverted, the sync pulses are positive and the
video is negative. In this case, use " + " SLOPE.
(5) Single sweep
Single sweep is used typically to sweep a nonperiodic
waveform once only.
1. Set the TRIG MODE switch @ to AUTO or NORM. For
use as trigger input, connect a signal of practically the
same amplitude and frequency as the signal to be
displayed. Then set a trigger level.
2. Set the TRIG MODE switch @ to REST. The LED label-
ed " R E A D Y " will go on, indicating the trigger wait
state. The LED will go off upon completion of A sweep.
3. Being sure that the " R E A D Y " LED is lit, connect the
signal to be observed, and set the TRIG MODE control
@ to REST so that the unit is waiting for trigger. Once
the signal is triggered, it will be swept once and the
" R E A D Y " LED will go off.
NOTE: Dual trace waveform cannot be observed if the ver-
tical MODE is set to ALT. Use the CHOP mode in-
stead.
[B] R E A D O U T O P E R A T I O N
1 CRT surface readout
By rotating the INTEN (READOUT/STORE) controller
@
clockwise up to the very end, characters are
displayed on the CRT. Adjust the brightness as necessi-
ty requires. The CH1 and CH2 scale factors are
displayed in the lower part of the CRT in accordance
with setting of the MODE select switch (jj) . The sweep
scale factor is displayed in the lower right part. By pull-
ing the < • POSITION/PULLx 10 MAG switch © , a
tenth scale factor of the SWEEP TIME/DIV dial @ is
displayed. The calendar is displayed in the upper left.
NOTE: If the DATA-ON/OFF switch on the bottom is set
to the OFF position, the calendar and clock are
not displayed. To set the calendar and clock,
refer to "Maintenance and Adjustment".
When the readout values are displayed, brilliance
modulation
may
waveform in some cases. In such a case, rotate
the INTEN (READOUT/STORE) control (ffj) fully
counterclockwise. The readout function will be
turned OFF, and the brilliance modulation on the
real-time waveform will disappear.
influence
the
real-time
2 Cursor measurement
4 V 1 :
Set the MODE select switch @ to ALT and
the CURSORS select switch @
and two horizontal cursor lines are displayed on
the CRT and voltage difference between cursor
lines calculated in accordance with setting of
the CH1 VOLTS/DIV dial ®
upper right on the CRT. By setting the CH1
VARIABLE controller ®
tion, voltage ratio is displayed.
Move the cursors to the positions to be
measured with the AREF controller ©
A controller @ .
AV2:
Set the CURSORS select switch @ to AV2,
voltage difference in accordance with the CH2
range setting is displayed in the upper right on the
CRT similarly with the above 4 V 1 .
AT:
Set the CURSORS select switch @ to AT,
and two vertical cursor lines are displayed on
the CRT and time difference between the cur-
sor lines calculated based on the sweep scale
factor displayed in the lower right is displayed
in the upper right. By setting the SWEEP
VARIABLE controller @ to the UNCAL posi-
tion, time ratio is displayed.
MAT:
Set the CURSORS select switch @) to MAT,
and two vertical cursor lines are displayed on the
CRT and frequency between the cursor lines
calculated based on the sweep scale factor
displayed in the lower right is displayed in the up-
per right. By setting the SWEEP VARIABLE con-
troller @
to the UNCAL position, phase dif-
ference is displayed.
[ C ] O P E R A T I O N A S A D I G I T A L O S C I L L O S C O P E
(1) In normal oscilloscope mode (DISPLAY MODE-REAL),
adjust the y (up/down) position so that the GND
luminance line is at the center of the CRT.
In this condition, the storage range is 4 div. from the
center of the scale on the CRT for both the upper and
lower section. If a voltage exceeding ± 4 div. is input,
the storage waveform will be clamped and normal
waveform analysis will not be obtained.
If this is the case, set the vertical input coupler to AC
or DC, and check that the waveform to be stored in
present on the CRT.
• GND luminance line
Example when the GND luminance line is set at the center
of the CRT in DISPLAY MODE-REAL
Fig. 1 1
to 4 V 1 ,
is displayed in the
to the UNCAL posi-
and
Storage range
17
Advertisement
Table of Contents
