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Un.
Trigger
A
Ii
ne-frequency
si gnal
is
obtai ned from
the
secondary
of
TM
500
Series
Power
Modul e
transformer
and
atten
uated by
R905.
R907,
and
R909
to
provide a
line-trigger
so
u
r
c
e
for
the
time-base.
Cali brator
The Ca
li
b
r
a
t
or
circuit composed
of 091 0, 0900. and
their
associated
passive
components
produces
a
s
qu
a
r
e
wave output
with
accurate
amplitude
and at
a
rate of
twice
the
power-li ne frequency.
This
output
is
available
at
the
@ MAY
1980
Theory of
Oper"'on-SC
502
cali brator
jack on
the front
panel as a 0. 6
V
(ground
to
peak)
square-wave voltage.
The
resistive-capacitive
network at
the
base of
0900
receives
a
pulsati ng dc
voltage from
full-wave
rectifi er
CR900-CR902
and
p
r
o
d
u
c
es
a
nearly
symmetri cal
switchi
ng
signal
for
091
0
and
0900.
As
091 0
is
alternately
switched
on
and off at twice
the
l i ne frequency.
current
through
R91 5
is
alternately
s
wi
t
c
hed
through
the
tran
sistor or
through CR91 S
and
R91 7.
prodUCi ng
the
calibrator
test
signal . .
3-9
Содержание SC 502
Страница 1: ...SC 502 OSCILLOSCOPE ...
Страница 2: ......
Страница 9: ...SC 502 1878 1 The SC 502 Oscilloscope xi REV APR 1982 ...
Страница 10: ...Verso Filler Page z z ...
Страница 32: ...Verso Filler Page z z ...
Страница 34: ...Verso Filler Page z z ...
Страница 59: ...Mal ntenance SC 502 5 2 FIg 5 1 ReplKlng the cathode ray tube and drcult board removal MAY 1 960 ...
Страница 63: ...Section 6 SC 502 OPTIONS There are no options available at this time REV A APR 1980 6 1 ...
Страница 84: ...Beam R873 C473 Ext Bal R535 CH 1 Vert Po R335 CH 2 Vert Pos R394 ADJUSTft TP980 5 ...
Страница 125: ...REV MAR 1 984 ...
Страница 126: ...SC 502 m m o ...