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(6) HOLDOFF Control
W h e n observing signals containing pulses at different
intervals in spite of constant repetition of pulses, im-
proper adjustment of the H O L D O F F control (§) results
in doubled waveform display. In such a case, adjust the
H O L D O F F to obtain stable triggering.
O n - C R T
O n - C R T
, d i s p l a y
© ,
, d i s p l a y
I n p u t s i g n a l
i H O L D
H O L D
Fig.
If the HOLDOFF is set like (a), waveforms © and © are
displayed on the C R T alternately.
D o u b l e d w a v e f o r m d i s p l a y d u e t o i m p r o p e r
H O L D O F F
Fig. 15
By adjusting the H O L D O F F to condition (6), waveform
© only is displayed on the C R T .
H O L D O F F i s p r o p e r l y a d j u s t e d
[2] SWEEP MAGNIFICATION
When observing a part of w a v e f o r m by expanding the time
a x i s , quickening the s w e e p time may exclude the part to
be observed from the C R T . T h e s w e e p magnification is used
in s u c h a case for proper observation. Move a part to be
observed to the C R T center with the
trol knob © . Pressing then the x 10 M A G s w i t c h ® turns
on the LED and magnifies the part tenfold. T h e s w e e p time
of the readout values displayed on the C R T is decupled.
N O T E : S w e e p magnification is impossible if A INT B or X - Y
of the H O R I Z O N T A L MODE s w i t c h e s is selected.
22
O n - C R T
O n - C R T
, d i s p l a y
©
. d i s p l a y
©
©
O F F ®
O F F ®
1 4
a d j u s t m e n t
Fig. 16
• POSITION con-
[3] DELAYED SWEEP
The A s w e e p and B s w e e p are used for delayed s w e e p mag-
nification.
1 . Continuous Delay (Start After Delay)
The continuous delayed s w e e p can activate delayed
s w e e p operation from any point of A s w e e p .
a)
Select of the H O R I Z O N T A L M O D E s w i t c h e s © and
set each control and switch for normal waveform ob-
servation.
b)
Select A INT B of the HORIZONTAL MODE switches
©
and set the B S O U R C E to A F T . D . A bright
intensity-modulated part is displayed on the A sweep
trace. Its intensity can be controlled w i t h the PULL
B INTEN © . Length of the intensity-modulated part
to be magnified depends on setting of the B S W E E P
T I M E / D I V control (magnification ratio). Move the
intensity-modulation part to a part to be magnified
with the D E L A Y POSITION © . The delay time is dis-
played in the upper right of the C R T .
c)
By setting the HORIZONTAL MODE switches to A L T ,
t w o trace lines of the A s w e e p and B s w e e p are dis-
played alternately, enabling magnified and non-
magnified parts to be observed simultaneously. If
trace lines of the A s w e e p and B s w e e p are hard to
be observed due to overlapping, control the T R A C E
S E P (37) to shift the B s w e e p w a v e f o r m to an easy-
to-see position.
M a g n i f i e d i n t e n s i t y - m o d u l a t i o n
Fig. 18
Fig. 17
p a r t
A s w e e p
t r a c e line
B s w e e p
t r a c e line
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