FOR REFERENCE PURPOSES ONLY
BIPOLAR
POWER SUPPLYIiMPLI’HER
MODEL 0 6828 AN0 6827A
OPERATING AND SERVICE MANUAL
FOR SERIALS 1317A-00101 AND ABOVE’
yr
j ,:,
HP Part No. 5950.1702
‘For Serials Above 1317A-00101
a change page may be included.
HEWLETT.PACKARD
Printed: November. 1974
COPYRIGHT AND DISCLAIMER NOTICE
Copyright - Agilent Technologies, Inc. Reproduced with the permission of Agilent
Technologies Inc. Agilent Technologies, Inc. makes no warranty of any kind with regard
to this material including, but not limited to, the implied warranties of merchantability
and fitness for a particular purpose. Agilent Technologies, Inc. is not liable for errors
contained herein or for incidental or consequential damages in connection with the
furnishing, performance, or use of this material or data.
SECTION I
GENERAL INFORMATION
1-1 DESCRIPTION
l-2
service instructions for two BiPolar Power SupplvlAmplifiers
&x&c systems. circuitry, or components. The BPS/A
can be operated as a power supply or as an amplifier. Ter-
minals on the rear terminal strip permit ~CCCES to various in.
fernal control points to further expand the operational Cap-
abilities of the unit, The resulting flexibility lends the BPS/A
10
these applications are ourlined in Section III of this manual.
The following paragraphs describe nome of the features of
the BPS/A as a power supply and as an amplifier.
l-3
1-4
power supply by setting the front panel MODE switch fo
the POWER SUPPLY position. The
either a Constant Voltage output or Constant Current out.
Put. The dc output is bi.polar and is continuously adjustable
from
wntinuously through zero. A
callv changes the supply from constant voltage to consfant
current operation at a preset or programmed voltage/current
Point. The front panel CURRENT MODE indicator lights
far constant current operation, Both the supply and the
Ipad are profected against overvoltage and overcurrent
conditions by internal circuits. Dual output voltage ranges
are provided for better resolution. The front panel RANGE
switch allows selecfion of the high (X10) or low 1x1) output
range.
1.5
using the front panel VOLTAGE control, or remotely, by
means of a resistance connected to the appropriate rear terminals. The output current can be programmed locally using the from panel CURRENT control, or remotely, by
means of a resistance or voltage source connected to the
apprwriste rear terminals. The BPS/A can be programmed
(COntrolled at a very high rate of speed (less than 50lrseC
foroutput voltage change over the entire voltage span).
Local and remote programming connections are described
in Section II I, The outpuf voltage and current ranges are
as follows:
This instruction manual contains operating and
an almost unlimited number of applications. Some of
POWER SUPPLY FEATURES
The unif can be made to function as a regulated dc
supply
can furnish
its maximum rated positive value to an equal negative
wossow
The oufput voltage can be programmed locally
feature automati.
Model 6826A:
-5V to +5V at 0 to l.OA (low rangel
-60V to +5OV at 0 to l.OA (high range)
Model 6827A: -lOV to +lOV at 0 fo 0.5A (low raw)
-lOOV to +lOOV at 0 to 0.5A (high range)
1.6 The BPS/A can sink, as well as spurc~ current. Permitting it to serve 8s a variable load device. The BPS/A can
sink up to 50% of the rarsd output current.
1.7
1.8
AMPLIFIER FEATURES
The unit can be made to function as a variable gain
or a fixed gain amplifier by setting the MODE switch t0 the
VAR GAIN AMP or FXD GAIN AMP position. When oper
sting 8s an amplifier, the BPS/A can amplify externallv
applied ac or dc signals. Variable gain can be controlled
locally (VOLTAGE control) or remotely and is accurate to
0.1%. The variable or fixed gain provided is as follows:
Model 6826A:
Variable Gain - O-2 (low rangel. 0.20
(high range)
Fixed Gain -
1x (low range) 10x
(high range)
Model 6827A: Variable Gain - O-4 (low range). O-40
(high range)
Fixed Gain -
2x bw range). 20x
(high range)
1-9 The variable gain amplifier is nowinverting and has
B frequency response from dc to 15kHz. The fixed gain
amplifier is inverting and has a frequency response from dc
to 40kHz 16826A4) or from dc to 30kHz 16827A). Tofal
harmonic distortion is 0.1% (maximum).
l-10
METERS
1-11 A voltmeter and an ammeter on the front Panel
monitor the ac or dc output voltage and current respective-
ly. Associated front panel VOLTAGE METER and CUR.
RENT METER switches allow the meters to monitor either
an ac or dc output and also provide dual range monitoring
capability for better resolution. The dc meter accuracy is
f3% of full scale and the ac meter accuracy is *5% of full
SCPIP.
I-12 SPECIFICATIONS
1.13
given in Table l-l.
Detailed specifications for the two models are
l-l
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