HP 492A Operating And Service Manual
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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
,~,,".
:0:
'.1&
1.----19---.,
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