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Waveform with high frequency noise
Trigger signal by HF rejection
Fig.
*
Triggering Level
Trigger point on waveform is adjusted by the LEVEL @ ,
and SLOPE (f|) controls. Fig. 9 shows the relationship bet-
ween the SLOPE and LEVEL of the trigger point. Triggering
level can be adjusted as necessary.
SLOPE " - " RANGE
SLOPE " + " RANGE
*
Auto Trigger
When the trigger MODE ®
sweep circuit becomes free-running as long as there is no
trigger signal, permitting a check of GND level. When a trig-
ger signal is present, the trigger point can be determined by
the LEVEL control for observation as in the normal trigger
signal. When the trigger level exceeds the trigger signal,
the trigger circuit also becomes free-running where the
waveform starts running. When the trigger MODE is set to
NORM and/or, when the trigger signal is absent or the trig-
gering level exceeds the signal there is no sweep.
(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.
Using the
POSITION control, adjust the desired portion
of waveform to the C R T . Pull the x 10 MAG control to
magnify the display 10 times. For this type of display the
sweep time is the SWEEP TIME/DIV setting divided by 10.
(3) DELAYED SWEEP OPERATION
(ALTERNATING SWEEP OPERATION)
Delayed sweep operation is achieved by use of both the A
sweep and the B sweep.
Procedure:
1. First select the HORIZ DISPLAY switch to A and adjust
for a normal waveform display.
8
LEVEL
9
Fig.
selection is in A U T O , the
2. Pull out the SLOPE @) control to set the B MODE to in-
itiate the S T A R T S AFTER DELAY mode. Select the
HORIZ DISPLAY switch to A L T mode and the B sweep
will appear as an intensified portion of the A sweep. The
length of the intensified portion is adjusted by the B
SWEEP TIME/DIV control.
Adjust • T R A C E S E P control @
of both the A and B traces. The upper trace is the non-
magnified portion of the waveform with the magnified
portion super-imposed as an intensified section.
The lower waveform is the intensified portion displayed
magnified.
The B sweep intensity is adjusted using the B INTENSI-
T Y control @ ) .
3. Shift the intensified portion of waveform (section to be
magnified) along the A sweep by use of the DELAY
TIME MULT @) .
4. Select the HORIZ DISPLAY to B DLY'D to display the in-
tensified portion as a magnified B sweep. (Fig. 10)
Delay Time (magnified portion) = DELAY TIME MULT
setting x A SWEEP TIME/DIV setting.
5. For S T A R T S AFTER DELAY operation, apparent jitter in-
creases as magnification increases. To obtain a jitter
free display set the B MODE @) to TRIG. In this "Trig-
gerable After Delay" mode the A trigger signal selected
by the SOURCE switch
source.
A Sweep
B Sweep
B Sweep
Fig. 10
for easy observation
@
becomes the B trigger
Intensity modulation area
1 5
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