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Tektronix 2445A - Page 35

Tektronix 2445A
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Theory
of
Operation-2445A/2455A Service
-
-
CH
2
na_rr
-
BNL
i
VERTICAL
DELAY
LINE
CHANNEL
/
r
73nll
'\
/
SWITCH
-
VERTICAL
0
'2
\.
, 2
AMPLIFIER
2/
cot
0
.,
READOUT
r
VERJ.JrCAL
~
READOUT
(!I
0
cuanni_rr
un1:1T7DNTAL
mrr
...
(II
-
I-
ffi
READOUT
>
REQUEST
READOUT
ACKNOWLEOSE
EXT
ZIN
TRACE
SEP
DISPLAY
HORIZONTAL
SELECTS
CI!....,
SEQUENCER
SWEEP
SATES
Z-AXIS
DC
0
HOLDOFF
OUT
RESTORER
DLY
SELECT
0
I
~
s,
2/
Z-AXIS
~-21<V
A
SATE
I
0
,I
--,
AMPLIFIER
-1.9KV
CRT
B
SATE
0
I-
CD!!J
~
~~
(!l(.J
,:-,...
MW
.......
~iil
a:<
,"
2
1-1-
(II
(II
A
GATE
A
TRIS
SWEEP
~
2 I
0
HORIZONTAL
-✓
CD--+
A
SWEEP
AMPLIFIER
HORIZ
SIS
>
i,:
B
SWEEP
0
..
TRIGGERS
I
DELAY
0
GATE
-
HIGH-VOLTASE
-
!
POWER
SUPPLY
-
0
7
B
-
+
co-
SWEEP
-
f
TRIG
0
B
GATE
CD
HORIZONTAL
OUT
(X)
6017-27
Figure 3-1. Instrument
block
diagram (cont).
3-3

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