38
NOTE
Attach a bnc-to-binding post adapter to the A TRIG-
GER external input jack.
Using
a test lead with
an
alligator clip
at
each
end, connect one alligator clip to
the adapter and the other clip to the
~1
kHz
CAL-
IBRATOR output.
2.
Set
A TRIGGER SOURCE switch to EXT.
3.
Depress
VERT
MODE A TRIG VIEW
push
button
and
release
CH
1
VERT
MODE
push
button.
4. Adjust A TRIGGER SLOPE
and
LEVEL
controls to
stablize
and
center the display.
NOTE
The
CALIBRATOR
signal
is
not
intended to be used
as
a precise timing reference. It
is
employed in the
following steps only
as
a convenient means
of
dem-
onstrating basic instrument operation.
5.
Verify a display
of
approximately
one
square
wave
(first positive
edge
to
second positive
edge)
per
graticule division
(see
Figure 12).
Use
the horizontal
POSITION control
to
align the waveform
with
graticule lines.
l_
±···
..........................
..
-
~ ~ ~
~
~ ~
~
~
3
DIVISIONS
300mV
~
--
~
~ ~ ~ ~ ~
~
I t
......................................
..
1 SQUARE-WAVE PER
....,_DIVISION=
1
kHz
INPUT
SIGNAL
2756-13
Figure 12. Basic
4658
timing check.
465B/DM44
Operators @
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