SECTION I
GENERAL DESCRIPTION
1-1 DESCRIPTION
The @ Model 460B is a wide band distributed amplifier especially
designed to amplify high speed pulses to high voltage levels with
negligible overshoot. The output voltage is sufficiently high to
drive the deflection plates of a cathode ray-tube. In order to re=
tain the fast rise time and shape of high speed pulses, it is neces-
sary that the amplifier have a wide, reasonably flat frequency re=
sponse. The frequency response of the @ Model 460B closely
approximates the gaussian response and hence retains the charac-
teristics of short fast pulses. Figure 1, Figure 2.
The high output of the 460B is obtained with standard receiving
tubes by designing the amplifier primarily to amplify pulses of a
single polarity. Thus the Model 460B amplifies positive pulses
to the maximum level of 125 volts open circuit, while negative
pulses may be amplified to a maximum level of 16 volts open cir-
cuit. A phase inversion occurs within the amplifier so that a pos-
itive pulse applied to the input will be a negative pulse at the out-
put. However, either upward or downward deflections of the CRT
is possible, since either the upper or lower deflection plate may
be connected to the ground terminal of the Model 46OB.
1-2 ACCESSORIES AVAILABLE
A complete line of accessories, for use with the Model 460B, is
available from the Hewlett-Packard Company, These accessories
are listed on the Specification page and at the end of the Table of
Replaceable Parts, Section V.
1-3 230 VOLT OPERATION
This instrument is normally supplied with the power transformer
connected for 115 volt operation, unless otherwise specified on the
order. Complete conversion information for 230 volt operation is
contained in Section IV of this manual.
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