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Tektronix 502A

Tektronix 502A
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Calibration
Procedure
—
Type
502A
SENSITIVITY
Initial
Checking
Min.
Amp.
Setting
Freq
.
and
Freq.
for
Proper
Amplitude
Response
.2
VOLTS
PER
CM
4
cm
at
1
kc
1
m
c
2.8
cm
100
mVOLTS
PER
CM
4
cm
at
1
kc
400
kc
2.8
cm
50
mVOLTS
PER
CM
4
cm
at
1
kc
400
kc
2.8
cm
20
mVOLTS
PER
CM
4
cm
at
1
kc
200
kc
2.8
cm
10
mVOLTS
PER
CM
4
cm
at
1
kc
200
kc
2.8
cm
5
mVOLTS
PER
CM
4
cm
at
1
kc
200
kc
2.8
cm
2
mVOLTS
PER
CM
4
cm
at
1
kc
200
kc
2.8
cm
1
mVOLTS
PER
CM
4
cm
at
1
kc
200
kc
2.8
cm
.5
mVOLTS
PER
CM
4
cm
at
1
kc
100
kc
2.8
cm
.2
mVOLTS
PER
CM
4
cm
at
1
kc
100
kc
2.8
cm
.1
mVOLTS
PER
CM
4
cm
at
1
kc
50
kc
2.8
cm
Remove
input
signal
from
oscilloscope.
27.
Adjusting
A
Input
Attenuator
Compensa
tions
Apply
1
-kc
square
waves
from
the
Type
105
to
input
con
nector
A
of
the
vertical
amplifier
through
the
Input
Time
Constant
Standardizer.
The
cable
used
should
be
terminated
into
the
proper
resistance
on
each
end.
Place
the
Input
Selector
switch
in
the
A-DC
position
and
the
SENSITIVITY
switch
in
the
.2
VOLTS
PER
CM
position.
Adjust
the
output
of
the
Type
105
for
approximately
3
cm
of
vertical
deflection.
Set
the
TRIGGER
SELECTOR
to
trigger
off
the
proper
beam,
the
TIME/CM
to
.5
mSEC
and
the
TRIGGERING
LEVEL
to
trigger
the
signal.
Adjust
C410
for
an
undistorted
square
wave.
Place
the
SENSITIVITY
switch
in
the
2
VOLTS
PER
CM
position
and
adjust
the
Type
105
output
for
approximately
3
cm
of
vertical
deflection.
Adjust
C406A
and
C406C
for
an
undistorted
square
wave.
Place
the
SENSITIVITY
switch
in
the
5
VOLTS
PER
CM
position
and
adjust
the
Type
105
output
for
approximately
3
cm
of
vertical
deflection.
Adjust
C406G
and
C406J
for
an
undistorted
square
wave.
28.
Adjusting
B
Input
Attenuator
Compensa
tions
Connect
1
-kc
square
waves
from
the
Type
105
to
input
connector
B
of
the
vertical
amplifier
through
the
input
Time
Constant
Standardizer.
Place
the
Input
Selector
switch
in
the
B-DC
position
and
the
SENSITIVITY
switch
in
the
.2
VOLTS
PER
CM
position.
Set
the
Type
105
output
amplitude
for
approximately
3
centimeters
of
vertical
deflection.
Adjust
C440
for
an
undistorted
square
wave.
Place
the
SENSITIVITY
switch
in
the
2
VOLTS
PER
CM
position
and
adjust
the
Type
105
output
for
approximately
3
cm
of
vertical
deflection.
Adjust
C407A
and
C407C
for
an
undistorted
square
wave.
Place
the
SENSITIVITY
switch
in
the
5
VOLTS
PER
CM
position
and
adjust
the
Type
105
output
for
approximately
3
cm
of
vertical
deflection.
Adjust
C407G
and
C407J
for
an
undistorted
square
wave.
5-9

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