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{a)
Trigger point
"NORM"'
{(b)
Trigger
point
I
(c)
"EXE
Trigger
point
Fig. 11
|
LEVEL control
Trigger
point
(2)
Input signal changed
into a pulse waveform.
(3)
Readjust level
(a) When the trigger level is set
around the center of the waveform.
p
i
}
Same level as (1)
(3)
Highest levei
(b) When the trigger level is set to
the ''—' side of the waveform
(Mode switch set to ''NORM'')
Triggering without
(4)
setting level
(c) Mode switch set to "'FIX''.
Fig. 12
18
(2) MAGNIFIED SWEEP OPERATION
Since merely shortening the sweep time to magnify a por-
tion of an observed waveform can result in the desired por-
tion disappearing off the screen, such magnified display
should be performed using the MAGNIFIED SWEEP.
(3) ALTERNATE SWEEP OPERATION
A sweep and B delayed sweep are usable in an alternating
fashion making it possible to observe both the normal and
magnified waveform simultaneously.
Procedure:
1. Set the HORIZ MODE to A and adjust for anormal wave-
form display.
2. Depress the HOLD OFF control @ (AFTER DELAY) and
set the HORIZ MODE to ALT. Adjust TRACE SEPATA-
TION @) for easy observation of both the Aand B traces.
The upper trace is the non-magnified portion of the wave-
form with the magnified portion super-imposed as an
intensified section. The lower waveform is the intensi-
fied portion displayed magnified.
3. The 4 REF/DELAY TIME POSITION @) contra can be used
to continuously slide the magnified portionof the wave-
form across the A sweep period to allow magnification
of precisely the desired portion of waveform.
4. Set the HORIZ MODE to B to display the INT intensified
portion as a magnified B sweep. (Fig. 14)
5. For Starts AFTER DELAY operation, appaent jitter in-
creases as magnification increases. To obtan a jitter free
display pull the HOLD OFF control out. In this ''Trigger-
able After Delay'' mode the A trigger signa selected by
the SOURCE switch @ becomes the B trigger source.
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