HP 492A Operating And Service Manual
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Model 492A/494A
Section III
Figure
3-6
)
1600+-----+-----1
-.::..bp--
MODEL
494A
TYPICAL
MODULATION
CHARACTERISTICS
INPUT
-6
OBM
-21
OBM
-250BM
-280BM
-31
OBM
OUTPUT
-------
0
DB
-'-'-'30B
............- _ 6
DB
-,,-,,-9
DB
----12
DB
FREQUENCY
:
9000
Me
HELIX
VOLTAGE:
OPTIMIZED
AT
Eg=O
FOR
EACH
CURVE.
OUTPUT
:
DB
BELOW SATURATION
OUTPUT
AT
E
g
=0
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800
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6
00
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0
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0
1000
0
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o
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+10
o
-10
GRID
-20
-30
BIAS
VOLTS
-40
-50
G-M-37
-60
Figure
3-6.
Typical
Plot
of
Output
Voltage
VB
Grid
Voltage
of a Model 494A
00144-2
3-5