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•
Section I
SECTION !
GENERAL INFORMATION
1-1. GENERAL INFORMATION.
J-2. The -hp- Model 461A Wide Band Amplifier is
used primarily where flatness is important. The -hp-
Model 462A Wide Band Amplifier is used primarily
where rise time is important. The Model 461 }''-
frequency response
is II dB
from 1 kHz to 150 Mliz.
The Model 462A rise and fall times are less than .:;.
nanoseconds. Either 40 dB or 20 dB gain can be
selected with the front panel GAIN (DB switch). The
Models 46JA and 462A are shown in Figure J-L The
specifications for both instruments are given in Table
J.l.
1-3. Since the Models 461 A and 462A are nearly
identical, this manual
will
discuss the instruments in
terms of the Model 46J A. The Model 462A will be
mentioned only when its operation differs from that
of the Model 461 A.
1-4. ACCESSORIES AVAILABLE.
J -5. The
.hp-
1l048C 50-ohm
feedthrough
termination is an available accessory that is connected
at the output of the Model 461A. The feed through
termination should be used to ensure that the Model
461A is operating into its rated impedance in the
event the instrument is connected to a device with an
impedance greater than 50 ohms.
Table 1-1. Specifications.
•
MODEL46U
Frequency Range : 1 kHz
to
150 MHz.
Frequency Response:
dB. 1 kHz to 150
MHz
when operating into a 50 ohm resistive load (SOC
kHz reference).
Gain at
500
kHz: 40 dB
-cl-O.S
dB: or 20 dB +;-1.0
dB, selected by front panel switch (inverting).
MODEL 462A
Pulse Response:
Leading Edge and Trailing Edge
Rise Time: Less than 4 nanosecono:
Overshoot: Less than
5Cj(
Pulse Overload Recovery: Less than
times overload.
Pulse Duration
fOI
J.O% Droop:
~,C
'is.
us for
l
I
I
101
- I
Input Impedance: Nominal 50 ohms.
Maximum Input: 1 volt nns or
2.
volts
pop
pulse.":
Maximum de InpUT'
Equivalent Input Noise Level- Less than 40
uv
in
40 dB position when Laded with 50 ohms.
)npu , Impedance: Nominal 50 ohms
Maximum Output
resistive ioac.
; volt rms
t:
:? volts
pop
pulse."
rated .oac
•
Overload Recover'
Lc~~ ::i-!,ii~
-nicroseconc
ic:
~:~
times overics
c
resistive loao
i :
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