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ANALOGUE SIGNAL TRANSMISSION

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the operating principles of the most common techniques of analog modulation (AM, DSB, SSB, FM and PM) with the aid also of the signal generators and auxiliary circuits as VCO and PLL.
THEORETICAL TOPICS
• Amplitude modulation and demodulation (AM)
• Double side band modulation and demodulation (DSB)
• Single side band modulation and demodulation (SSB)
• Frequency modulation and demodulation (FM)
• Phase modulation and demodulation (PM)
• VCO and PLL circuits
• Carrier generator
• Low frequency generator
• Noise generator
• Fault simulation
TECHNICAL FEATURES
• AM modulation and demodulation
Carrier input 0 – 15 V peak-to-peak, 70 – 700 kHz Modulator input 0 – 15 V peak-to-peak, 3.5 – 50 kHz
• DSB modulation and demodulation
Carrier input 0 – 15 V peak-to-peak, 70 – 700 kHz
Modulator input 0 – 15 V peak-to-peak, 3.5 – 50 kHz
• SSB modulation and demodulation
Selective filter
Carrier input 0 – 15 V peak-to-peak, 300 - 350 kHz
Modulator input 0 – 2 V peak-to-peak, 30 – 50 kHz
SSB demodulator with ACG
• FM modulation and demodulation
Input 1 – 10 V peak-to-peak, 2-5 kHz
Carrier 6-9 MHz
• Quadrature FM modulation and demodulation
Input 1 – 10 V peak-to-peak, 3-5 kHz
• PM modulation and demodulation
Input 1 – 5 V peak-to-peak, 0 – 300 Hz
• VCO and PLL circuits
Input 0 – 4 V peak-to-peak, 0 – 6 kHz
• Carrier generator
– 15 V peak-to-peak, 70 – 700 kHz
• Low frequency generator
– 15 V peak-to-peak, 3.5 – 50 kHz
• Noise generator
• Transmission with class C amplifier
• Gain of the receiver 15 dB
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M60

ANALOGUE SIGNAL PROCESSING

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the operating principle of analog communication systems and analog signal processing techniques such as multiplication, division, square root, power, logarithm, antilogarithm, attenuation, amplitude modulation and demodulation, noninverting adder, difference amplifier, integrator and shunt.
THEORETICAL TOPICS
• Familiarization with analogue computing technique
• Basic and advanced linear operations
• Simultaneous multiplication and division
• Analog computation of powers and roots
• Log ratio computation
• Antilog computation
• Square root operation
• Attenuator overview
• Characteristics and key specifications for fixed and step attenuators
• Audio attenuators
• Forms of amplitude modulation
• Amplitude modulation and demodulation methods
• The Operational Amplifier characteristics
• Main configurations of the OA
• Fault simulation
CIRCUIT BLOCKS
• Reference power supply unit
• Real-time Analog computational unit
• One-quadrant multiplication unit
• One-quadrant division unit
• Root circuit
• Power circuit
• Log ratio operation with thermic compensation
• Antilog operation with thermic compensation
• Attenuator
• Amplitude modulation and demodulation
• Non inverting summing block
• Difference amplifier
• Integrator
• Differentiator (Shunt)
Complete with theoretical and practical manual.
Dimensions of the module: 297x260mm

DL 3155M60R

DIGITAL MODULATION‐DEMODULATION

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the operating principle of the digital communications using the most common techniques such as PCM modulation, PAM modulation, PFM modulation, PWM and PPM modulations and finally the DM modulation with the aid also of a signal of noise, of analog filters and output amplifiers.
THEORETICAL TOPICS
• Different types of digital modulation and demodulation for analogue signals
• Evaluation of pros and the cons of each conversion mode
• Fault simulation
TECHNICAL FEATURES
• PCM modulator and demodulator
• 8 bit coding with compression, Mµ or A selectable through bridge
• 2 channels for transmission and 2 channels for reception
• Possibility to use 1 or 2 digital channels
• Integrated anti‐aliasing and band limiting analogue filters in reception, capacitive switching type
• Passing band from 300 Hz up to 3400 Hz
• PAM signal generation, demodulation, transmission for each single channel
• PAM modulator and demodulator
• Two channel time division
• Regeneration of the synchronism and channel signals
• Sampled, but not quantified signal
• PTM Signal Generation
• Passing band from continuous to 4000Hz
• PWM and PPM modulator and demodulator
• Single channel with passing band from continuous to 4000 Hz
• Regeneration of the synchronism signal
• Conversion of the PWM signal to PPM and from the PPM signal to PWM
• PCM signal generation and demodulation
   • PCM Signal Time‐Division Multiplexing
• PFM modulator and demodulator
Single channel with passing band from 300 Hz to 3400 Hz
Circuit realization with the use of a PLL
• Delta modulator and demodulator
Single channel with passing band from continuous to 3400 Hz
Timing
Ramp signal generation
Channel noise
Possibility to adjust the noise that is superimposed to both analogue and digital signals
• Analogue filters
2 analogue filters with 3400 Hz limited band
• Output amplifier
2 amplifiers able to pilot a small loudspeaker
• Microphone amplifier
• Microphoneamplifier with automatic gain control
Channel bandwidth
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL DL 3155M61

DIGITAL SIGNAL TRANSMISSION

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the operating principle of the transmission of digital signals using the most common modulations such as ASK, FSK and PSK with the aid of encoders/decoders NRZ, RZ, Manchester, Biphase and Duo-binary.
THEORETICAL TOPICS
• The transmission of digital signals
• The base band transmission analysed through the study of NRZ, RZ, Manchester, Biphase, DPSK and duo-binary coders and decoders
• The numerical modulators and demodulators to realize, verify and test the ASK, the FSK, the PSK modulation
• Fault simulation
CIRCUIT BLOCKS
• NRZ (Non Return to Zero) coding and decoding
• RZ (Return to Zero) coding and decoding
• Manchester coding and decoding
• Bi-phase coding and decoding
• Duo-binary coding and decoding
• ASK modulation and demodulation
• FSK modulation and demodulation
• PSK modulation and demodulation
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm
This board needs the AUXILIARY BOARD DL 3155M62A
• Clock and carrier generator, obtained by a single quartz source at 2.4576 Mc/s with a selectable clock frequency of 2400, 4800, 9600, 19200 or 38400 cycles / sec,
• Pseudo-random data generator that generates two random sequences of 1 and 0 of different length, 15 bits and 255 bits,
• Bit Error Rate (BER) meter,
• Digital delay equalizer,
• Artificial noise generator, that generates a quasi-white spectrum signal in the band 2 - 40 kHz,
• Jitter meter. 

DL 3155M62

AUXILIARY BOARD

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
• Clock and carrier generator, obtained by a single quartz source at 2.4576 Mc/s with a selectable clock frequency of 2400, 4800, 9600, 19200 or 38400 cycles / sec, 
  • Pseudo‐random data generator that generates two random sequences of 1 and 0 of different length, 15 bits and 255 bits,
   • Bit Error Rate (BER) meter,  
• Digital delay equalizer,  
• Artificial noise generator, that generates a quasi‐white spectrum signal in the band 2 ‐  40 kHz,  
• Jitter meter.

DL 3155M62A

FIBRE OPTICS

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the operating principle of the communications through the use of the optical fiber analyzing the distortion characteristics and the quality of the transmitted signals.
THEORETICAL TOPICS
• Introduction to fibre optics communication
• Attenuation
• Numerical openings
• Propagation methods
• Transmitted power specifications
• Chromatic and modal dispersion
• Cable attenuation specifications
• Received power specifications
• Time division (TDM) and wave length division(WDM) transmission
• Fault simulation
CIRCUIT BLOCKS
• Clock signal generation
• Serial interface
• ST fibre
• Analogue input / output
• POF fibre
• Printer interface
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M63

TRANSMISSION LINE

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the characteristics of a transmission line by analyzing the main parameters as the impedance of the line and the losses on the same.
THEORETICAL TOPICS
• Familiarization with the transmission line theory
• The four-terminal model of the transmission line (Equivalent circuit model)
• Input impedance of lossless transmission line
• Special cases of a transmission line (Half-wave and quarter-wave lengths, matched, shorted and open load)
• Stepped transmission line
• Practical types of transmission lines (Coaxial, microstrip, stripline, balanced, single wire, waveguide and optical fibre)
• Measuring the characteristics of a transmission line
• Measuring the attenuation of a transmission line
• Frequency characteristics of a transmission line
• Stationary waves
• Fault simulation
TECHNICAL FEATURES
• Function generator
• Input and output stages
• RLC simulated transmission line of 100m (4*25m)
• R loads
• L loads
• C loads
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M64

OPTO ELECTRONICS

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the luminescent characteristics of the colors by analyzing factors such as change in color and intensity of light. To fully understand these concepts tools as LED, photo detectors, LCD display, infrared detector sand optical switches are used.
THEORETICAL TOPICS
• Concepts of physics on light and colours
• Light radiation
• The vision of colour
• Light bulb operation
• LEDs
• LEDs technical features
• Concepts of Liquid Crystal Display
• LCD types
• Light sensors
• Photodiodes
• Photoresistors
• Infrared radiation
• Opto‐isolators
• Fault simulation
TECHNICAL FEATURES
• Photo detector
• LEDs
• Couplers
• Light drivers
• 555 Oscillator
• LCD driver
• LCD display and voltmeter
• 3909 Flasher
• Infrared Transmitter/Receiver
v Slotted optical switch
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M70

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ProductsCodeCatalogueTender specsManuals SimpleVideo
ANALOGUE SIGNAL TRANSMISSIONDL 3155M60
ANALOGUE SIGNAL PROCESSINGDL 3155M60R
DIGITAL COMMUNICATIONDL 3155M61
DIGITAL SIGNAL TRASNSMISSIONDL 3155M62
AUXILIARY BOARDDL 3155M62A
FIBER OPTICSDL 3155M63
TRANSMISSION LINEDL 3155M64
OPTO ELECTRONICSDL 3155M70