Elenco Digital / Analog Trainer in Case - Manual (Page 4)

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INTRODUCTION
POWER SUPPLY
Model XK-550 has five built-in power supplies which
will satisfy most design needs. This includes two
variable power supplies giving up to +20 volts and –
20 volts at .5 amp. Below 15V the current available
is over 1 amp. Three fixed power supplies give you
+12VDC, –12VDC or +5VDC at 1 amp each. These
fixed voltages are the most commonly used voltages
for design work. All supplies are regulated to within
150mV. This means that you can increase the
current draw from no load to .5 amp and the voltage
will change less than 150 millivolts. All supplies are
also short circuit protected by using integrated circuit
regulator devices.
The analog trainer contain a complete function
generator capable of producing sine, square and
triangle waveform. The frequency of this generator
is continuously variable from one hertz to over 100,000 hertz in five steps. A fine tuning control
makes selection of any frequency easy. The output
voltage amplitude is variable between 0 to 15Vpp.
The output impedance is approximately 330 ohms.
DIGITAL TRAINER SECTION
The digital trainer has the necessary functions to do
your digital designs. They consist of a clock
generator, two no bounce logic switches, 8 LED
indicator lamps and 8 data switches. These
functions will make it easy to do your digital
experiments.
Congratulations on your purchase of the Elenco ®
Model XK-550 Digital / Analog Trainer. This trainer
is designed to simplify designing of digital and analog
circuits. It contains most of the necessary test
equipment needed to build and test these circuits.
Your XK-550 has four basic trainers in a single
package. They are, 5 independent power supplies,
an analog trainer, a digital and a bredblock assembly
trainer. We shall proceed in describing each trainer
in the following sections.
ANALOG TRAINER SECTION
FUNCTION GENERATOR