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with an appropriate receptacle.
to connect this plug to a standard two contact system.
the adapter is used, the ground connection is brought out on
a s h o r t wire.
This ground lead should then be connected to
a suitable ground for the protection of operating personnel.
An adapter may be used
When
INPUT AND OUTPUT
The input and output jacks on the control panel, r e q u i r e special
200-ohm connectors and cables.
(See paragraph 1-2).
2 -4 OPERATION
Connect the Model 460B to the power line, t u r n on the power
switch and the instrument is i n operation.
To use as a linear amplifier to amplify sine waves, etc.
,
o r
pulses of either polarity, s e t the LINEAR-PULSE s w i t c h to the
LINEAR position.
position the output is limited to
16
volts peak into an open c i r c u i t
o r 8 volts peak into a 200-ohm load.
a phase r e v e r s a l between input and output is p r e s e n t and that a
positive input pulse appears i n the output as a negative pulse.
When the LINEAR-PULSE switch is i n this
It must be r e m e m b e r e d that
To realize the full output capabilities of the Model 46OB, the
LINEAR-PULSE switch must be in the PULSE position and a posi-
tive pulse of about 8 volts peak be supplied to the input.
In the PULSE position of the LINEAR-PULSE switch the amplifier
tubes a r e operated a t higher than normal supply voltages.
g r i d bias is i n c r e a s e d to keep tube dissipation within ratings.
Under these conditions
(1-8
volt input) the r a t e d tube dissipation is
reached with a duty cycle of 10%. Lower driving voltages will
allow proportionally higher duty cycles, but the output voltage
will be lower.
The
See Figure 3.
In o r d e r to supply this 8-volt positive pulse to a Model 460B, the
units may be cascaded o r used with one o r m o r e Model 46OA
Wide Band Amplifiers, s e e Figure 4.
In general, when cascading
460 amplifiers, consideration must be given to the polarity as
well as the amplitude of the pulse to be amplified.
F o r maximum
deflection, the set-up m u s t be a r r a n g e d s o that the input to the
l a s t 460BR amplifier i s positive and of approximately 8 volts peak
amplitude.
This is e a s i l y done because the 460BR inverts
the
in-
put pulse.
Hence, a n additional 460B can be used when n e c e s s a r y
to invert pulse polarity.
In most applications a n input of about 4
volts is sufficient to give satisfactory deflection of a cathode-ray
tube.
Certain precautions must be taken when cascading s e v e r a l
460 Amplifiers, s e e P a r a g r a p h 2-2, INSTALLATION.
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