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SECTION i'
GENERAL INFORMATION
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Figure 1-1. DC Power Supply, Model 6448B
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1-1 DESCRIPTION
1-2
This power supply, Figure 1-1, is co'mplet~-
ly transist.:irized and sulti}ble for bench or rack op-
eration. It is a well-regulated, Constant Voltage/
Constant Current supply that wUl furnish full rated
output voltage at the maximum rated output.current
or can be continuously adjusted throughout the r.,\Jt- ·
put range.' The front panel CURRENT controls 'can
be used to establish the output current limit (over:.
load or.short clrcult)when the supply' is used,as a
constant voltage. source and' the VOLTAGE contra 1
can be •1sed to establish the rnltage 1'tmit when the
supply :is used as a constant current source. The
supply\vUl automatically crossover 'from constant
voltage to constant cµrr'ent operation and vice-
versa if the output current or voltage exceeds tho
limits established by these controls.
1-3
Output voltage and current can be continu-
ously monitored on the two.front panel mete~s. · ,,
. The power supply !:as both front an_d rear output
terminals. Either the positive
or
negative output
terminal may be ground,ed or the pc;,wer supply can '
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be oper11ted Ilo11ting at up to
a
maximum of 300
· Volts off ground. ;
1-4, OPERATING CAPABILITIES
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1-5
Terminals at the rear of the unit allow ac-
<:ess-,to various control points within the unit to
expand the operating capabilities of the lnstrumcmt.
A brl_ef description of these capabilities ls given
below.
1-6
Remote Programming. Tho power supply may
be programmed (controlled) from a romoto location
by mea,ns of an external voltage sourco or resist-
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1•.:.7 · Remote· Sensing. The degradatlon·,in reguln-
1ion which would occur at the load
because,
of the
voltage· drop In the load leads can be,;educed by
using the power supply lri the remote sensing
mode _of operation •
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l.uto-Parallel Ope~atlon. Th~ pO\~~r supply.,
ri1ay be operated
'in
Auto-Parallel with a similar
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