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CO MP ENSATION
α. Connect the Squa re-wave Ge nerator to the 7Α16 Α
I NPUT through α Χ10 50 Ω atte nuator, 50 Ω termination,
an d α 20 pF R C
N
o rmalizer.
b. Set th e Square-wave Generator to o btain α 1 kH z,
six- division dis p lay .
M
aintain α six
d
ivision d is p lay for all
VO LTS/DI V switch
p
ositio ns, remove th e Χ 10 atten u ator
when necessary .
ε.
A
dj ust-and chec k co m pe nsation for best front corner
and flat top as sh own in Table 5-2.
R
olloff or overs h oot
should not exceed .06
d
ivision.
d. Disconnect the Squ are-wave Generator from the
7Α16 Α an d return the VOLTS/DI V switch to 10 m V.
TA BLE 5-2
Atte nuato r Compensation
V
O LTS/DIV
Ad just fo r Op timum
Switch Setting
Square Corner
F lat Top
5 mV
C134
-
10 mV
C
hec k
C
hec k
20 mV
C106
C107
50 mV
C110
C111
.1 V
Cl 14
Cl 15
.2 V
C
hec k
Chec k
.5 V
C
hec k
C
hec k
1 V
Cl 18
Cl 19
2 V
C
hec k
C
hec k
5 V
C
hec k
C
hec k
TABLE 5-1
8. Adjust
L
ow
F
re quency Compensation
9. Adjust
H
igh Frequ ency Compensation
Calibration-7A 16A
V
ertical Deflection Accuracy
α. Connect the Square-wave Ge nerator to the 7Α16 Α
I NPUT th roug h
α Χ10 50Q atte nu ator an d α 5092
V
OLTS/DIV
Standard
Vertical
M
aximum
terminator .
Switch
Am p litu de
Deflection
Error fo r ±2°/ο
Setting
Calibrator
in
Accuracy
Output
Divisions
(divisions)
b .
Set
the
Square-wave
Ge nerator
to
obtain
5 mV
20 m V
4
Set in step 4
a pp roximately
six
vertical
d
ivisio ns
of
α
25 kH z
10 mV
50m V
5
±0.1
square-wave.
20 mV
0 .1 V
5
±0.1
50 mV
0 .2 V
4
±.08
ε. A djust- R 436, LF compensation control, for
b
est flat
.1 V
0.5 V
5
±0 .1
top (minim u m tilt) .
.2 V
1 V
5
±0 .1
.5 V
2 V
4
±.08
1 V
5 V
5
±0 .1
d .
Discon nect t h e Squ are-wave Generator.
2 V
10 ν
5
±0 .1
5 V
20 V
4
±.08
7. Ad ju st Input Compensation
α . Co nn ect the
P
ulse Ge nerator to the 7Α16Α I NPUT via
α
G
R cable, Χ 10
G
R attenuator, an d α 50 Ω Terminato r.
b.
Set the 7 Α 16 Α VO LTS/DIV switch to 5 mV and
a djust th e
P
ulse ge n erator for α vertical
d
isplay of
appr oximately 6
d
ivisions .
ε . Set the time base unit to obtain α triggered disp lay at
α rate of approximately .02 μs
p
er
d
ivision .
d .
P
osition the to p of the wavefo rm to 1
d
ivisio n above
center screen .
e . Ad ju st- h igh frequ ency controls :
R
531, C531,
R
436,
C436,
R
756, C756,
R
770, and C770 in th at order for
b
est
front corner a n d flat to p . Aberrations should not exceed
±4% an d 6%
p
ea k to pea k.
NOTE
If integrated circuit
U
750 or transistors 0820 or
0840 are
r
eplaced, it may become necessary to
r
eadjust coil L770. If satisfactory results are not
achieved by adjusting all other high frequency
controls, then adjust
L
770 in the following manner:
Remove
L
770 from the plug-in socket and
s
horten
the coil by clipping α small piece with a diagonal
cutter.
R
eplace the coil to the plug-in sockets. If
aberrations
d
ecrease, continue to
s
horten the coil for
optimum results . If the aberrations are increased,
form α larger coil using AWG 26 gauge bare wire.
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