HP 460BR Operating And Servicing Manual
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460BR
FAST PULSE AMPLIFIER
OPERATING
AND
SERVICING
MANUAL
OPERATING AND SERVICING MANUAL
FOR
MODEL
FAST
r
5
J
PULSE
Serial
1720
46OBR
AMPLIFIER
and Above
HE
275
PAGE MILL
WLETT -PACURD COMPANY
ROAD,
PAL0 ALTO, CALIFORNIA,
U.
S.
A.
46
OB
004-3
SPECIFICATIONS
Frequency Res pons e
Gain:
Output Impedance:
Rated Output:
Maximum Output:
Input Impedance:
:
High Frequency
curve when operating into
tive load. 3 db point
Low Frequency
when operating into
prox.
open circuit
ing amplifier.
With
46A-95D Adapter, response +1 db,
to
Approximately 15 db into
Approximately
Linear Amplifier
peak into
into open circuit.
Pulse Amplifier
negative peak open circuit (unilateral) pulse
operation 10% duty cycle.
200
volts output).
3
db at 3 kc when operating into an
@
410B VTVM - when used with
200
mc.
a
ohms (t8 volts input required for 125
-
closely matches Gaussian
a
200-ohm resis-
is
120 mc.
-
off approx. 3 db at 100 kc
a
matched load.
(i.
e., CRT plates) or succeed-
200
ohm load.
200
ohms.
-
Approximately 8 volts
200
ohm load or 16 volts peak
-
Approximately 125 volts
Off ap-
@
200
kc
Noise Figure:
Delay Characteristics:
Rise Time:
Power Supply:
Size:
Weight:
Accessories Available:
6
Less than
Approximately
Approximately 0.003 psec.
overs hoot.
19" relay rack panel, 5-1/4" high; 6-3/4"deep.
12
lbs. Shipping weight 18 lbs.
@<46A-l6A Patch Cord:
@
46A-16B Patch Cord:
@
46A-95A Panel Jack: For
low capacitance.
@
46A-95B Cable Plug: For
@
812-52 Cable:
specific ation.
($3
46A-95C 50-ohm Adapter: Type N to Op460,
50 ohm termination.
@
46A-95D Adapter: @410B VTVM to @460,
no termination.
@
46A-95E Connector Sleeve: Joins two 46A95B Cable Plugs.
@
46A-95F Adapter: For connecting to 5XP
CRT.
($3
46A-95H Adapter: Type N to @460,
ohm termination.
@
46A-95J Adapter: Type N to ($460, no termination.
@
46A-95K Adapter: @410 VTVM to ($5460,
200
@
460B-95A Adapter: For connecting to
Model 150A Oscilloscope plates.
db.
.
016 psec.
200
ohm termination.
No
appreciable
200
ohms,
200
ohms,
200
200
ohm cable in length to
2'
long.
6'
long.
ohm cables
ohm systems.
200-
fp
CONTENTS
Page
Section
Section
Section
Section
I
I1
I11
IV
GENERAL DESCRIPTION
1-1
1-2
OPERATING INSTRUCTIONS
2-1
2-2
2-3 Controls and Terminals
2-4 Operation
THEORY
3-1
MAINTENANCE
4-1 Cover Removal
4-2 Tube Replacements
4-3
4-4 230
4-5
4-6
4-7 Test Procedure
Description
Accessories.
Inspection
Installation
..............
.............
..............
..............
..............
OF
OPERATION
Distributed Amplifier
............
Power Supply
Volt
Operation
Trouble Shooting
Replacement
Connector
.............
of
200 ohm cable
.............
............
...........
........
.........
..........
..........
1
1
3
3
3
5
7
9
9
9
10
10
10
12
Section
V
TABLE
5-1 Table
OF
REPLACEABLE PARTS
of
Replaceable Parts
.......
15
Figure
1.
(A)
Gaussian Response
(B) Typical 460BR Amplifier Response
Figure
2.
(A)
(B)
0.01 psec Pulse Through
0.02
psec
Pulse Through
@
460BR Amplifier
3
Amplifiers in Cascade
SECTION
GENERAL DESCRIPTION
I
1-1
1-2
DESCRIPTION
@
The
designed to amplify high speed pulses to high voltage levels with
negligible overshoot. The output voltage
drive the deflection plates of
tain the fast rise time and shape of high speed pulses, it
sary that the amplifier have
sponse.
approximates the gaussian response and hence retains the characteristics of short fast pulses. Figure
The high output of the 460B
tubes by designing the amplifier primarily to amplify pulses
single polarity.
to the maximum level of 125 volts open circuit, while negative
pulses may be amplified to
cuit. A phase inversion occurs within the amplifier
itive pulse applied to the input will be
put. However, either upward or downward deflections of the CRT
is
be connected to the ground terminal of the Model 46OB.
ACCESSORIES AVAILABLE
Model 460B
The frequency response of the
possible, since either the upper or lower deflection plate may
is
a
wide band distributed amplifier especially
is
sufficiently high to
a
cathode ray-tube.
a
wide, reasonably flat frequency re=
@
Model 460B closely
1,
Figure
is
obtained with standard receiving
Thus the Model 460B amplifies positive pulses
a
maximum level of
a
negative pulse at the out-
In order to re=
is
2.
16
volts open cir-
so
that a pos-
neces-
of
a
A complete line
available from the Hewlett-Packard Company,
are listed on the Specification page and
Replaceable Parts, Section
1-3 230 VOLT OPERATION
This instrument
connected for 115 volt operation, unless otherwise specified on the
order.
contained in Section
Complete conversion information for 230 volt operation
of
accessories, for use with the Model 460B,
is
normally supplied with the power transformer
IV
V.
of this manual.
at
the end of the Table of
These accessories
is
is
-1
-
SECTION
OPERATING INSTRUCTIONS
2-1
INSPECTION
This instrument has been thoroughly tested and inspected before
being shipped and is ready for use when received.
After the instrument is unpacked,
for damage received in transit.
follow the procedure outlined in the "Claim for Damage in Ship-
ment" page at the back of this instruction manual.
2-2
INSTALLATION
I1
it
should be carefully inspected
If any shipping damage
is
found,
No special precautions are necessary except, when several
Amplifiers are to be used in cascade,
mon ground,
output must be kept away from the input to avoid the possibility of
feedback.
2-3
CONTROLS
ON
This toggle switch controls the a-c power supplied to the instru-
ment from the power line.
LINEAR, PULSE
This rotary switch selects the type of amplification desired.
i.
e. : mounted in a relay rack, and the high-voltage
AND
TERMINALS
they must have
a
FUSE
The fuseholder, located on the panel, contains the power
line fuse.
fied in the Table of Replaceable Parts, Section
POWER CABLE
The three-conductor power cable supplied with this instrument
is terminated in
third contact
blade connector which grounds the instrument chassis when used
Replacement fuses should be
a
polarized three-prong male connector. The
is
an offset, round pin added to a standard two-
of
the type speci-
V.
460
good com-
-3
-
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