Function Generator
GF3 and GF4 function generator
Ref :
293
036
293 037
ENGLISH 7
Specially designed for didactic applications, it delivers sinusoidal, triangular
and rectangular output signals whose frequency can be adjusted in 5 ranges
(4 by push-button, and 1 by pressing simultaneously on the 2 lower range
buttons) from 1 Hz to 110 KHz.
A 10 turns potentiometer enables, within in each range, the display of the
frequency with great accuracy.
• Overlapping of ranges.
• The output voltage is adjustable from 0 to 20 V peak to peak, with
attenuation by push-button 1 - 1/10 - 1/100.
• The very low output impedance (50 Ω) is particularly useful for
teaching students in the last three years of secondary school.
• A DC voltage (offset) may be added or subtracted from the signal
with a continuous setting between 0 and 5 V.
• An associated LF amplifier, on the GF3 model, may be used, for
example, to drive a loud speaker.
• The modulation of frequency and amplitude is possible on the GF4
model (without amplifier).
3 Commissioning
The device is delivered ready for use at 220-230 Volts.
To connect it to 115 Volts, rotate the voltage selector placed under the
device. Stick a label on the device reading "115 Volts".
The indicator lamp must come on when the device is energised.
It is recommended to use the device after a minimum heating time, which
allows the characteristics to be conserved: 15 min
3.1 Frequency display
• Select the desired range by pressing the corresponding push-button
(12).
(1) Adjustment of
frequencies by
potentiometer 10 turns
(1 to 11)
(2) Indicator light
(3) Offset from 0 to
5V
(4) Adjustment of
gradient level
0 to 20 Vcc
(5) Attenuation :
1 – 1/10 ou 1/100
(6) Outputs
Function generator
(7) Offset (+ or -)
using push button
(8) Amplifier
outputs 3W
k
t
4mm
(9) Mode selection
(10) Inputs
am
lifie
(12) 4 ranges :
10 Hz to 110 KHz by
pressing the 2 left
buttons
simultaneously
(11) Adjustment of
amplifier output
level
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