Fourier Synthesis

FOURIER SYNTHESIS
 enables the theoretical study, with the help of
the exercises, of the signal synthesis according to the Fourier
method. The module includes ten sine generators (1
fundamental + 9 harmonics) with quartz control, a d.c. voltage
source and an 11-input adder stage.
TRAINING PROGRAM
• Signal synthesis by summing 10 harmonics, each selectable:
- +sin
- -sin
- +cos
- -cos
• Wave-form generation:
- Square
- Triangle
- Ramp
- Pulse
- Rectified sine
- AM
- Others
• Spectrum analysis of the signal with spectrum analyzer

TECHNICAL SPECIFICATIONS
• Frequency of the fundamentals: 10 kHz with quartz control
• Frequency of the harmonics: 20-30-40-50-60-70-80-90-100 kHz
• Phase of each sine wave: selectable 0° (sin), 90° (cosine),
180° (-sin), 270° (-cosine)
• Amplitude of each sine-wave: adjustable on 2 ranges from 0
to 1 Vpp or from 0 to 10 Vpp
• Signaling of the presence of each harmonic: via led
• Amplitude of the d.c. component: adjustable from -10 V to +10 V
• Adder stage with 11 inputs
• Power supply: ±12 Vdc
• Dimensions: 385x123x40 mm
INCLUDED ACCESSORIES
• Theoretical-experimental handbooks
• Cables as necessary


TRAINING PROGRAM
Introduction to optical fiber systems
• The optical fiber
- Constructive structure
- Light propagation in the optical fibers
- Modal dispersion
- Chromatic dispersion
- Attenuation
- Band width
• Sources and detectors
- Sources: Led and Laser
- Optical detectors: PIN and avalanche photodiodes
• Connections and headings
- Connections
- Headings
Optical fiber communication systems
• Digital transmission system
• Analog transmission system
• Video transmission system
• Transmission system between PCs
• Data Multiplexer transmission system
• Bi-directional transmission system with one fiber
• Bi-directional transmission system with two fibers
• Synchronous data transmission
• Asynchronous data transmission
• Used components
- Digital transmitter
- Analog transmitter
- Digital receiver
- Analog receiver
- FM modulator
- FM demodulator
- Audio modulator and Audio+Video combiner
- Video/Audio separator and Audio demodulator
- Data multiplexer
- Data demultiplexer
- WDM (Wavelength Division Multiplexer)
- Data coding / decoding: NRZ, Manchester,bi-phase
Mark/Space
- V24/RS232C interface
• Components characteristics:
- Digital and linear driving
- Characteristic curves of the optical source (*)
- Polarization current
- Emitted power adjustment
- “Optical power/current” curve of the source (*)
- Operating point of the LED
- Characteristics and driving of the Laser diode (*)
- Automatic control of the power emitted by the Laser diode
- Wave-form of the transmitted signal
- Detector responsivity (**)
- Avalanche photodiode characteristics and biasing
- Receiver saturation
- Modal dispersion
- Linearity of the connection
- Frequency response of the connection
- Dimensioning of the connection
- Power margin
Measurements on the optical fibers
• Components identification
• Structure of the optical cable
• Numerical opening
• Attenuation
• Connectors
Trouble-shooting
Note: (*): with optical power meter
(**): with optical source
TECHNICAL SPECIFICATIONS
Silk-screen panel
• Characteristics:
- It contains the silk screen panel
- It contains the functional block diagrams
- It contains the access and connection points, signaling
and test points of the system components
- The rear side in transparent plastic enables the display of
all component parts
• Contained components:
- 300 meters of multimode connecterized graded-index
62.5/125 optical fiber
- Pulse generator
- Data generator (0, 1, 0/1, 4x0/4x1)
- Sine generator
- Input for external microphone
- Video bar generator
- FM modulator/FM demodulator
- Audio modulator/Audio demodulator
- Audio/Video combiner
- Audio/Video separator
- Audio amplifier with loudspeaker
- Transmission interface / reception interface
- LED optical source
- LASER optical source and monitoring photodiode for
automatic power control (APC)
Optical receiver with PIN photodiode
- Optical receiver with avalanche photodiode
- 8-channel data multiplexer
- 8-channel data demultiplexer
- Wave-length division multiplexer
- Wave-length division demultiplexer
- Data coders/ decoders: NRZ, Manchester, Biphase
Mark/Space
- V24/RS232C interfaces
• Audio/Video inputs
• Audio/Video outputs
• Test points, display, connection and regulation
• 10-fault simulator insertable by means on switches and
protected with key-lock covering
• Power supply: 230 Vac (110 Vac upon request) – 50/60Hz
• Dimensions: 640x810x300 mm
Kit for Numerical Opening evaluation
• Characteristics:
- Laser Source in the visible
- Support for connectorized fibers
Optical cables
- 4 3m optical cables of graded-index connectorized fiber
62.5/125
- 1 3m optical cable of step-index connectorized fiber 9/125
- 1 3m optical cable of connectorized step-index fiber
200/230
- 1 5m optical fiber with connectorized plastic fiber