Product description:
The experimental box is designed according to the internal relationship between signal system and digital signal processing, a new comprehensive experimental platform of signal system experiment and digital signal processing experiment. The experimental box adopts digital signal processing technology, which can complete the experiment that the traditional signal system experiment box is hard to complete or the experimental effect is not good, such as:
signal system convolution, arbitrary signal decomposition, signal frequency domain analysis, Fourier transform performance analysis, etc. Complete digital signal processing related experiments, such as: DSP (or SOPC) based signal acquisition, FIR (IIR) digital filter online design and performance verification, FFT algorithm design and signal frequency spectrum analysis, voice signal band limit, voice encryption, voice compression, etc.
Technical parameter
1. Integrated instrument based on operating system and TFT:
DDS low-frequency signal source, can produce: sine wave, triangle wave, pulse, half wave, full wave, music, sweep frequency and other signals, sine wave, sweep frequency: 0-2000KHZ; other signal frequency: 0-50KHZ; signal amplitude :0-10Vpp;
Sampling pulse, frequency: 0-100KHZ, duty cycle: 12.5%-87.5%;
Low frequency spectrum analyzer, frequency: 100HZ-1.5MHZ;
Frequency meter: 0-2000KHZ;
Millivoltmeter: 0-10V, frequency: 0-2000KHZ;
2. Can complete a variety of convolution experiments, input signals and system functions can be set by PC;
3. Design, simulation and verification of various passive and active analog filters; sampling and recovering of complex signals, recovery filters can be developed;
4. Can complete the online design, impulse and frequency response simulation and implementation of digital filter (providing a full set of online design and download software). Students can study the position and size of harmonic components in complex signals based on this function.
5. Based on digital signal processing technology, can complete: convolution, decomposition and synthesis of arbitrary signals(triangle wave, sine wave, half wave, full wave and other signals, various modulation signals); can study the influence of harmonic amplitude and harmonic phase on signal synthesis.
6. Built-in network interface and high-speed data acquisition module can achieve functions based on LABVIEW virtual oscilloscope, virtual spectrum analyzer, virtual frequency selective meter. Make real-time signal time domain frequency domain analysis on a PC;
demonstrate the principle of real-time signal synthesis and the Gibbs effect. The acquisition data can be stored. Analyzed and process various signals in the backstage of the PC: such as bandwidth analysis, spectrum analysis, energy analysis,etc.
7. The experimental box built-in voice interface and dedicated voice acquisition chip, using "oversampling" and "decimation filtering" technology to ensure that the voice also has a good recovery effect in 8KHZ sampling, sampling rate from 8KHZ to 96KHZ is programmable.
Experiment
Experiment 1 Step response and impulse response
Experiment 2 Simulation of continuous time system
Experiment 3 Active passive filter
Experiment 4 Sampling theorem and signal recovery
Experiment 5 Display of second-order network state track
Experiment 6 Transient response of the first-order circuit (zero input response and zero state response)
Experiment 7 Transient response of second-order circuit
Experiment 8 Second-order circuit transmission characteristics
Experiment 9 Signal convolution experiment
Experiment 10 Decomposition of rectangular pulse signals
Experiment 11 Synthesis of rectangular pulse signals
Experiment 12 Effect of harmonic amplitude on waveform synthesis
Experiment 13 Effect of phase on waveform synthesis
Experiment 14 Performance analysis of digital filter and various vilters
Experiment 15 Digital filter online design and arbitrary signal harmonic analysis
Experiment 16 Signal time domain frequency domain analysis
Chapter III Digital signal processing and voice processing experiment
Experiment 1 Digitization of the voice signal (the original sound can be listened and the waveform diagram can seen);
Experiment 2 Fourier transform (amplitude frequency characteristics and phase frequency characteristics);
Experiment 3: Scale conversion of voice signals (analyse variation of voice and its spectral before and after conversion )
Experiment 4 Voice band limit processing spectrum analysis (voice signals pass through low pass, high pass and band pass filters respectively).
