HP 6826A - Specifications

SECTION I
GENERAL INFORMATION
1-1 DESCRIPTION
1-2 This instruction manual contains operating and
service instructions for two Bipolar Power Supply/Amplifiers
(Models 6826A and 6827A). The Bipolar Power Supply/
Amplifier (BPS/A) is a general purpose instrument useful in
any laboratory engaged in the research and development of
electronic 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 access to various in¬
ternal control points to further expand the operational cap¬
abilities of the unit. The resulting flexibility lends the BPS/A
to an almost unlimited number of applications. Some of
these applications are outlined in Section ill of this manual.
The following paragraphs describe some of the features of
the BPS/A as a power supply and as an amplifier.
1-3 POWER SUPPLY FEATURES
1-4 The unit can be made to function as a regulated dc
power supply by setting the front panel MODE switch to
the POWER SUPPLY position. The supply can furnish
either a Constant Voltage output or Constant Current out¬
put. The dc output is bi-polar and is continuously adjustable
from its maximum rated positive value to an equal negative
continuously through zero. A crossover feature automati¬
cally changes the supply from constant voltage to constant
current operation at a preset or programmed voltage/current
point. The front pane! CURRENT MODE indicator lights
for constant current operation. Both the supply and the
load are protected against overvoltage and overcurrent
conditions by internal circuits. Dual output voltage ranges
are provided for better resolution. The front panel RANGE
switch allows selection of the high (X10) or low (XI) output
range.
1-5 The output voltage can be programmed locally
using the front panel VOLTAGE control, or remotely, by
means of a resistance connected to the appropriate rear ter¬
minals. The output current can be programmed locally us¬
ing the front panel CURRENT control, or remotely, by
means of a resistance or voltage source connected to the
appropriate rear terminals. The BPS/A can be programmed
(controlled) at a very high rate of speed (less than BOpsec
for output voltage change over the entire voltage span).
Local and remote programming connections are described
in Section III. The output voltage and current ranges are
as follows;
Model 6826A: -5V to +5V at 0 to 1.0A (low range)
--50V to +50V at 0 to 1.0A (high range)
Model 6827A: -10V to +10V at 0 to 0.5A (low range)
-100V to +100V at 0 to 0.5A (high range)
1-6 The BPS/A can sink, as well as source current, per¬
mitting it to serve as a variable load device. The BPS/A can
sink up to 50% of the rated output current.
1-7 AMPLIFIER FEATURES
1-8 The unit can be made to function as a variable gain
or a fixed gain amplifier by setting the MODE switch to the
VAR GAIN AMP or FXD GAIN AMP position. When oper¬
ating as an amplifier, the BPS/A can amplify externally
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
Fixed Gain
Model 6827A: Variable Gain
Fixed Gain
0-2 (low range), 0-20
(high range)
IX (low range) 10X
(high range)
0-4 (low range), 0-40
(high range)
2X (low range), 20X
(high range)
1-9 The variable gain amplifier is non-inverting and has
a frequency response from dc to 15kHz. The fixed gain
amplifier is inverting and has a frequency response from dc
to 40kHz (6826A) or from dc to 30kHz (6827A). Total
harmonic distortion is 0.1% (maximum).
1-10 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
±3% of full scale and the ac meter accuracy is ±5% of full
scale.
1-12 SPECIFICATIONS
1-13 Detailed specifications for the two models are
given in Table 1-1.
1-1