Wavetek 193 Instruction Manual page 29

20 mhz sweep/modulation generator
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4-3
Figure 4·2. Main Generator Block Diagram
SQUARE
SHAPER
o
DC
-0
'V
ALL FUNCTIONS
_
~XCEPTAM
...., '"
FUNCTION
0
0
PRE-
AMPLITUDE
o
ru
~
AMPLI-
- - --
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~
-A
AM..o.-
FIER
cr
.
....,
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AM
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OUTPUT
o
DC
I
?
~MPLI
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I
CARRIER SIGNAL
FIER
L
o
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TO SWEEP/FROM .....
I
MOD BOARD
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o '"
I
...--....,~_~.r'I~ ru
I
AM SIGNAL
+
I
....,
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FROM..
<
_.....{). AM ./.()
SWEEP/
+-
...J
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"
MOD BOARD
-
I
DC
r--..L.........L_
OFFSET
FUNC
OUT
-
t
-
4~
ATTEN-
f--
UATOR
SYNC
+23
-15
POWER
SUPPLY
+15
-5
+5
-23
.... ' ----_...1
...
HYSTERESIS
SWITCH
I
SYNC
, r
SYNC SELECT
r----~
ZERO CROSSING 1IIIIt..._t-----------._--....J
DETECTOR
TRIG BASELINE
TRG RST
TRIG ~
I
1----+
COMPENSATION lIIII
r.;.;;..::..:.:::.:.--------__J
IN
~----___'l
TRIGGER
1.__
~R.:.:U~N=----1..
MANUAL
TRIGGE'y
T
1
' V"
LOOP STOP
4
LOOP DC DELAY
t
COMPENSATIONt-----+--...J
...
~
...
+1
POSITIVE
..
CURRENT
...
CURRENT
SOURCE
--
~
SWITCH
f
j~
-
.~~
-I
...
NEGATIVE
~V
-..
CURRENT
SOURCE
.~
~
SINE
r-~~~r--~~~~I:~~~LER
-- .... _ _
~_~
-I'"
V"
CONVERTER
FREQ
MULT
VCG
~
IN
VERNIER/
SYM
VERNIER
e
~
\7
SYM
-{
~
~
'---~VMPL
>-
~~~--------------------------------------------------------------------------------~O~UTL-~
~
TIMING
CAPACITORS~.
__
.....
r-------.
.¢.
l
I --
CAPACITANCE
MULTIPLIER
SWEEP/FM IN
FROM SWEEP/MOD----I--;_
...
BOARD
FREQ/
<;l>-----1W
START FREQ:;>
-..
-=

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