Elenco Electronics XK-700 User manual

DIGITAL / ANALOG TRAINER
MODEL XK-700
A COMPLETE MINI-LAB FOR BUILDING, TESTING
AND PROTOTYPING ANALOG AND DIGITAL CIRCUITS
Instruction Manual
For Trainer with Organizer Case
Tools and meter not included.

INTRODUCTION
POWER SUPPLY
Model XK-700 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-700 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-700 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

GENERAL SPECIFICATIONS FOR MODEL XK-700
Power Supplies:
• 0V to 20VDC @ 0.5A (0V to 15V @ 1A)
• 0V to –20VDC @ 0.5A (0V to –15V @ 1A)
• +12V + 5% @ 1A
• –12V + 5% @ 1A
• +5V + 5% @ 1A
• 30VAC center-tapped at 15VAC @ 1A.
• Load regulation all DC supplies less than 0.2V no load to 0.5A
• Line regulation all DC supplies less than 0.2V 105 to 135V
• Hum and ripple all DC supplies less than .01V rms
• Short protection all DC supplies-Internal IC thermal cutoff
• Fuse - 1.25A 250V
Function Generator Analog Section:
• Waveforms sine, square, triangle, complimentary square
• Frequency - 1Hz to 100kHz in 5 steps continuously variable
• Fine frequency adjust - 10:1 approximate
• Amplitude variable 0-15Vpp
• Output impedance 330Ω: short protected
• DC offset change + 10V from zero crossing
Digital Section:
• Data switches, eight DPDT, Hi 5V, low 0V
• Logic switches, two no bounce with complimentary output
“On” voltage level 2.8V min., “Off” voltage level 1V max.
Input impedance 100kΩ.
• Eight LED readouts, 100kΩinput impedance
• Clock frequency, 1Hz to 100kHz in 5 steps continuously variable
• Clock amplitude, 5Vpp squarewave
• Clock rise time, better than 100nsec.
Bredboards Section:
• Two bredboards containing 830 tie points each (total 1,660 pins)
• 6 independent power bus lines for common connections
Variable Resistance (undedicated):
• 1kΩPotentiometer
• 100kΩPotentiometer