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HP 492A Operating And Service Manual page 5

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Section I
Table 1-1
Model 492A/494A
Table 1-1, Specifications
~
Model 492A
<Fj!
Model 494A
Frequency Range:
4 gc to 8 gc
7 gc to 12,4 gc
Maximum Output Power:
20 mw minimum into 50 ohm load
20 mw minimum into 50 ohm load
Modulated Pulse Delay:
Approximately 20 ns
Approximately 15 ns
Helix Modulating Voltage:
Approximately 40 volts peak-to-
peak. Provides 360
0
phase shift.
Input impedance lOOK
Approximately 50 volts peak-to-
peak. Provides 360
0
phase shift.
Input impedance lOOK
Hum and Spurious Modulation:
At least 45 db below signal level
At least 45 db below signal level
Weight:
Power Supply:
66 lb net, 85 Ib shipping
US volts ±10%, 50
to
60 cps,
approximately 200 watts
63 Ib net, 84 Ib shipping
U5 volts ±10%, 50
to
60 cps,
approximately 225 watts
Accessories Furnished:
AC-16Q cable assembly
AC-l6Q cable assembly
For Both Models
Small Signal Gain:
30 db minimum
Meter Monitors:
Cathode current, anode current, helix current, collector current.
Input Impedance:
50 ohms, swr less than 2
Output Internal Impedance:
50 ohms, swr less than 3
Dimensions:
Cabinet Mount: 7-3/8 in.wide, U-l/2 in.high, 20 in.deep.
TypeN
Less than 30 db
t
:0:
IU]
REAR
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:0:
'.1&
1 . - - - - 1 9 - - - . ,
492AR/494AR
Rack Mount:
Noise Figure:
Connectors,
RF Input and Output:
Pulse Rise and Decay Time:
Amplitude Modulating Voltage:
Approximately 15 ns
Approximately 50 volts peak positive pulse will produce a 40 db change
in
rf
power output. Sensitivity approximately 1 db/volt
1-0
00144-2

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494a