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coax
ial
cables, connect the Type
7A16
Input
and
the
Type
7851
EXT TRIG
IN
to the
"
T" connector.
c. Set
the
sine·wave
generator
to 50 kHz
and adjust
the
amplitude
for a
0.3 division (150
mV)
display
o
n
the
CRT.
d.
Reset the indicator oscilloscope Horizontal
Mode
to
8
and
advance
the 8
Intensity.
e. CHECK-
For a stable d isplay
triggered
on
the
positive
slope
of
the
signal.
f
.
ADJUST
-
R385
for a stable display triggered on the
positive slope
of
the
signal.
g. Reset the Type
7851
lE VEU$l
OPE
to
0/-.
h.
CHECK-For a
stable
display
triggered on the
nega·
tive
slope
of the
signal.
Performance
Check/
Calibration-Type
7851
NOTE
Slight readjustment
of
R385 may
be
necessary. Alter·
nate between 0/+ and 0/- while adjusting R385 for
optimum triggering
on both the positive
and
negative
slopes of
the
signal.
2. Check
/
A
djust
p.p
AUTO LEVEL Range
(R335· R336)
a.
Reset the
Type
7851 TRIGGERING
MODE
to P-P
AUTO. Increase the sine·wave generator output
to
display a
six
division
Signal.
b.
CHECK-A
triggered display
is
obtained
throughout
360
0
rotation
of
the
lEVE
l /SlOPE
control.
c.
AD
J
UST
-
R335
for a triggered
d
isplay as the
lEVEL/SLOPE
control
is
rotated from
0/+
clockwise
through top center to
0/-.
d
.
ADJUST
-
R336
for
a triggered
display
as the
l EVElJ'Sl
OPE
contro
l
is rotated
from
0/+
counterclock·
wise through bottom center
to
0/-.
T
ype 7504
®1
OscillatOf"
GR1310·A
...,
i
/
lO
X
BNCT
Atlenulitor
ConlleCtOf"
\
"
\
so o
hm
GR
to BNe
20pF
T.rmination
Adapt.,
NOf"mali~1H'
Fig.
5
-1.
Test
equipment
r.
quired
for I teps
1
through
8.
Type
191
--ob
i
---
--
••
.. .
,
-----
••••
0,
1
Cob' .
5·5
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