HP 492A Operating And Service Manual

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Brand: HP

Category: Amplifier

Type: Operating and service manual

Model: HP 492A , HP 494A

Pages: 44

Download 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
\
\
\
\
\
\
\
\
\
,
\
,
,
.
\
\.
\.
,.
.....
,.
,
,.
,
\ \
\
::::".
\'\
" \
\
\
\ \
800
-fI<--------t--\-----J'l---t---1
~\.\
',\
\
I \ \ \ \
6
00
+--4-~.____--+-.:,.-----4---;.-+-----l..-____,r----__r___---......,.....---_+---__l
'.'.
\ \
\>\\
\\
400+-------''rl-----T---'';---+-ir----1-----+-----+-----+----~
\
\.\
..•
',\
\\
.....
1\\
'.
'.
~~
\.
'\
\
..
\
200+------+------>,r-"""'d-....:...;-"""\r----11-----+-----+-----+----~
~~"
.•..
,~~
'~
"~
~
.............
~,.
~:.-.:.:..~
0~---_+_---_+_----1f_--==:..::.!!!~---_+_---_+---___l
1400+------+--~
1200
0
<
0
.J
:E
:I:
0
1000
0
It)
z
V>
~
.J
o
>
.J
.J
)
+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