+s
l
OP
E
ilia
ilia
iiil
f T T T
ft*’
’
-s
OP
Fig.
2-6.
Photograph
showing
the
phase-shifting
effect
of
the
TRIGGER
ING
LEVEL
control.
All
waveforms
were
obtained
with
the
TRIGGER
SELECTOR
set
at
+
INT.
Fig.
2-5.
Photograph
showing
the
effect
of
the
+
and
-
positions
of
the
black
TRIGGER
SELECTOR
knob.
iiii
A
1^
1
till
1 i
1111
ih
i
i
1
’
'
T
I
1
i
r
B
1
Ft
T *
ill!
r
•
Fig.
2-8.
Photograph
showing
an
application of
the
level
selection
ability
of
the TRIGGERING
LEVEL
control.
By
setting
the
LEVEL
control
to
the
+ side of the 0
mark,
the
trigger
circuits
can
be
made
to
reject
all
of
the waveform except
the
highest
peaks.
Fig.
2-7.
To trigger
along
slope
A
set
the
black
TRIGGER
SELECTOR
knob to +.
Use
the
positions
marked
-
to
trigger
along
slope
B.
For
maximum
trace
stability,
trigger
on
the
fastest
rising
or
falling
portion
of
a
waveform.
t
i
Ji
i
Ai
i
/ill
L
1
1
1
1111
1
11L
iili
4
MJ
4 ,
T
tit
t
flit
T
T
•
t
1
1
itr
■
*
♦
w
X
X
j
a
a i
i
T
f
T
Fig.
2-9. Photograph
showing
a
waveform
where
external
triggering
may
be
needed
to
examine
a
small
discontinuity
in
a
larger
waveform.
Usually
a
triggering
waveform
can
be
obtained
which
is synchronized
with
the
discontinuity.
F
ig.
2-10.
A
triple-exposure photograph
of
a
waveform
showing
the
effect
of
positioning
on
the
triggering
point
when
using
the
DC
triggering
mode.
The
TRIGGER
SELECTOR
controls
are
set
at
4-
INT,
DC
and
the
TRIGGERING
LEVEL
control
is at
0.
2-6
Operating
Instructions
-
Type
515/515A
AA
