Performance
Check/Calibration-Type
453/R453
Correct
(Optimum
square
(Al
l+++++++++-H~f+++H++H+H
corner
and
flat
top
)
I
/"':
:"\
\.
~Ill
I
Incorrect
-
(8)
(spike
and
top
not
flat)
+It-
I
!
(C)
fig.
5-16.
(A) Typical
CRT
display
showing
correct
compensation;
(8)
and
CCI
incorrect
compensation;
(0)
location
of
variable
capacitor
(bottom
view) .
23. Check/ Adiust Channel 1
and
2 Volts/ 0
Division Shunt Compensation
a.
Connect
the
square-wave
generator
high-amplitude out-
put connector
to
the
Channel 2 INPUT connector through
t~e
five-nanosecond GR
cable,
5 X GR
attenuator,
50-ohm
m-
line termination
and
20
pF
input
RC
normalizer,
in
given
order.
b. Set
the
CH
2 VOLTS/DIV switch
to
20
mV.
c.
Set the
square-wave
generator
for four divisions of one-
kilohertz signal.
d. CHECK-CRT
display
at
each
CH
2 VOLTS/DIV switch
setting listed
in
Table
5-3 for optimum flat
top
(see Fig.
5-16A,
B,
and
C).
e.
ADJUST-CH
2 VOLTS/DIV switch shunt compensation
as
given
in
Table
5-3 for optimum flat
top
on the display.
Readjust
the
generator
output
with
each
setting of
the
CH
2
VOLTS/DIV switch (remove
the
5X
attenuator
as
required)
to provide four divisions of deflection (only
about
three
5-18
divisions
obtainable
in
2 position). Fig. 5-16D shows
the
location of the
variable
capacitors.
f.
Disconnect the signal from the Channel 2
INPUT
con-
nector
and
reconnect
it
to
the
Channel 1 INPUT connector
through the five-nanosecond GR
cable,
5 X GR
attenuator,
50-ohm in-line termination
and
20 pF input
RC
normalizer,
in
given order.
g. Set the MODE switch
to
CH
1.
h.
CHECK-CRT display
at
each
CH
1 VOLTS/DIV switch
setting listed
in
Table 5-3 for optimum
square
corner
(see
Fig. 5-16A,
B,
and
C).
Remove
the
5 X
attenuator
as
re-
quired.
i.
ADJUST-CH
1 VOLTS/DIV switch shunt compensation
as
given
in
Table
5-3 for optimum flat
top
on
the
display.
Readjust the
generator
output
with
each
setting
of
the.
CH
1 VOLTS/DIV switch (remove
SX
attenuator
as
required)
to provide four divisions of deflection (only
about
three
divi-
sions
obtainable
in
2 position). Fig. 5-16D shows the loca-
tion of the
variable
capacitors.
j.
Disconnect all test equipment.
©
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