Performance
Tests
C-
22
Step
4.
Check
60 MHz Trigger
Sensitivity
a.
Set
the
leveled
sine-wave
generator
to
produce
a 1.2
division
display
at
an
output
frequency
of
60 MHz.
b. CHECK -
That
a
stable
display
can
be
obtained
by
adjusting
the
Trigger LEVEL
control
for
each
switch
combination
given
in
Table C-4
with
DC, LF REJ,
and
AC
Trigger COUPLING;
and
that
the
display
will
not
trigger
with
NOISE
REJ
or
HF
REJ
Trigger COUPLING.
Ensure
that
the
TRIG'D
light
comes
on
when
triggered.
c.
Disconnect
the
test
equipment
from
the
instrument.
Step
5.
Check
External
Trigger Range
a. SET:
VOLTS/DIV (CH
1)
....... 0.5 V
SEC/DIV ......................... 20 µs
Trigger COUPLING ....... AC
Trigger SLOPE ...............
Positive
Going
b.
Connect
the
leveled
sine-wave
generator
output
via
a 50 n BNC coaxial cable, a 50 n
termination
and
a
dual-input
coupler,
to
the
CH
1
OR
X
and
the
EXT
INPUT
OR
Z
input
connectors.
c.
Set
the
leveled
sine-wave
generator
to
produce
a
five-division
display
at
an
output
frequency
of
50 kHz.
d.
Position
the
waveform
equally
around
the
center
horizontal
graticule
line.
e. SET:
Trigger MODE ............. NORM
Trigger SOURCE ........... EXT
f.
CHECK -
That
the
display
is
not
triggered
at
either
extreme
of
rotation
of
the
Trigger LEVEL
control.
g.
Toggle
the
Trigger COUPLING
switch
to DC.
h.
Repeat
part
f.
Rev
12/92
Appendix
C:
Performance Verification
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