XK-TXP  PC based with communication trainer, electronic trainng kit for laboratory

1)Product overview

This trainer adopts” communication building blocks” type modular frame, from the perspective of the communication system, each knowledge point is matched to a independent module, each module has the standard structure, signal input and output interface and clock bus, communication bus interface. The module design adopts the current more popular “soft core and hard architecture “ open type design mode in the current communication device, not only can let the students configurate the module function flexibly, but also can use these standard module” building blocks” to build the communication system according to their own concepts, such as the wire communication system, wireless communication system, band-limited transmission, programme control switching system, mobile communication system, optic fiber transmission looped network, PSTN networks and so on, can let the students use these module” building blocks” to deep learn each knowledge point and all kinds of communication system before the student creation.

Of course , this kinds” soft core and hard architecture” open type design mode can also support the students to carry out the creative design, because on the hardware architecture design of each “building block”, the same function integration built by the “ building blocks” are all considered completely, through the soft cores customization and development, the students can fully redefine the “building blocks” according to their own concepts in the same kind function range, it is need to mention that, in order to fully improve the students creative and development interest and enthusiasm, this trainer fully support combining and adjusting their own design function with other existed “building blocks”, thus can integrate the questions during the design to the whole communication system and then being verified.

Besides, in order to support the students to carry out the learning and creative design by anytime and any place, we had specialized matched a network version virtual simulation software to this product, and “ move” all the trainer to PC, through login the network, the students can carry out learning and development on PC

2)Product characteristics and advantages

1. The module adopts upper and lower protective cover to fully protects, the upper cover is a transparent shell, between the upper and lower protective shell, it is adopted bayonets to conveniently disassemble and assemble.
2. The main control module can real-time feel the existence of each module, can configurate the function and set the parameters of each module separating from the PC.

3.Rich process measuring point

The leading out process measuring points can not only let the students carry out teh deep learning to theory knowledge, but also can be as the process measuring and test points of the signal processing during the process of students’ creation and development

1. The standard module, building blocks design is to ensure the flexiblity in the aspect of system building.

5.I/O port specilized protective techniques

The module key I/O ports all are adopted specialized insulation protective techniques, totally prevent the damge to the key components during the creative practice.

6.Matched with complete instrument modules

This product is matched with relative instruments, such as the signal source, frequency meter, spectrum analysis , error code test meters, optical power meter and so on.

7.The thoughtful detail

Each module has protection to prevent the reverse connection.

Can clearly see the signal process diagram and functional block diagram.

8.”One key” upgrading function

In order to upgrading and extending the purchased modules, the product is added the on-line upgrading function.

3)Main performance index and characteristics

Signal source output waveform:

Sine wave: frequency range:0-2MHz, amplitude range:0-5V

Triangle wave: frequency range:0-100KHz, amplitude range:0-5V

Square wave: frequency range:0-100KHz, amplitude range:0-5V

Music signal: real

Sampling signal: 1KHz+3KHz

DSB signal: carrier wave frequency:20KHz-30KHz

SSB signal: carrier wave frequency: 20KHz-30KHz

FM signal: carrier wave frequency:20KHZ

PN sequence: code length 15bits/127bits code rate range: 1kbp/s~2048kbp/s

Clock signal speed range: 1KHz~2048KHz

Signal source with swept-frequency signal output, half wave signal output, full wave signal output

Signal source coding and decoding kind: PCM coding and decoding, ADPCM coding and decoding, simple delta modulation, CVSD coding and decoding

Channel coding and decoding type: hamming code, recurrent code, BCH coding and decoding, convolution and RS code

Base band encoding type: AMI code, HDB3 code, CMI code, BPH code

Digit modulation type: ASK,FSK,BPSK/DBPSK,QPSK/OQPSK

Channel type: white noise, low pass channel, band pass channel

Sampling theory contains aperture distortion phenomenon observation and the experiment content of reverse sinc filter compensation to aperture distortion

Main characteristics are as follows:

1. The experiment system should adopt modular design, convenient for second development of the hardware circuit, for extending and upgrading the experiment system and for after-sale service

2. Each module should adopt upper and lower protective covers, the upper cover is a transparent shell, convenient for students observation and experiment, in order to facilitate the experiment teaching and modules maintenance, should adopt the bayonets to connect the upper and lower layer protective shell for conveniently disassembly

3.Equipped with specialized synchronous module, can show bit synchronization , frame synchronization, carrier synchronization function, and the bit synchronization contains filtering method and full digital phase-locked loop method.

4.In order to facilitate the students to understand and master the basic digital modulation method hardware architecture, ASK, FSK, PSK, DPSK should adopt hardware circuit to build, but not the DSP and software to realize.

5.can carry out time division digital transmission system, multiplexing base band transmission system, frequency band transmission system communication among different trainers, can simulate the real communication system signal processing, in the system experiment, the synchronous signal should be picked from the receiving end itself, do not need to wiring separately.

6.The trainer should be equipped with specialized channel simulation module, can realize the simulation of white noise, low pass, band limit and other channels, can show the real Nyquist eye pattern.

7.Equipped with manual and multimedia teaching courses, the courses can dynamically display the wiring process and the corresponding experiment result

8.The module’s symbol, signal process, function block diagram and I/O interface should be showed clearly, can make the students be familiar with each module and its function within the minimum time.

9.In order to easy upgrading the purchased module in the future, the product should support “one key” upgrading through SD card, can .directly insert the SD card to the main control module, through menu selection, can automatically upgrade the corresponding module.

10.Each module should be equipped with independent multiway power supply switch, the students can independently open and shut off each module according to the actual conditions.

11.In order to meet the students’ requirement of individual setting and adjusting the module during the students in creative research, the product can not only batch setting to many modules according to experiment, but also can support the student to separately adjust each parameters to each module .

12.The product should have good man-machine interface, in order to conveniently operate, the main control module should be equipped with color LCD display screen.

4)Experiment projects

²  Voice encoding technique

1.Sampling theorem experiment

2.Sampling aperture effect and the method to solve it.

3.Pulse code modulation(PCM)and demodulation and A/μ law conversion experiment

4.ADPCM encoding and decoding experiment

5.Simple delta modulation and CVSD encoding and decoding experiment

²  Digital modulation and demodulation experiment

ASK modulation and demodulation experiment

FSK modulation and demodulation experiment

BPSK/DBPSK modulation and demodulation experiment

QPSK/OQPSK modulation and demodulation experiment

MSK/GMSK modulation and noncoherent demodulation experiment

π/4DQPSK modulation and demodulation experiment

²  Base band transmission encoding and decoding experiment

AMI/HDB3 code conversion experiment

CMI/BPH code conversion experiment

²  Channel coding and decoding experiment

Hamming coding and decoding experiment

Recurrent coding and decoding experiment

BCH encoding and decoding experiment

Convolution encoding and decoding experiment

Convolution encoding and decoding and interweave and de-interweave experiment.

²  Synchronization techniques experiment

Filtering method and digital phase-locked loop method bit synchronization extraction experiment

Analog phase-locked loop hold-in range and pull-in range measuring experiment

Phase-locked frequency synthesis experiment

Frame synchronization extraction experiment

²  Time division multiplexing technique experiment

Time division multiplexing and demultiplexing experiment

²  Channel simulation experiment

Low pass channel simulation experiment

Band pass channel simulation experiment

²  Communication system experiment

HDB3 circuit encoding communication system experiment

Correction encoding communication system experiment

5)Product configuration

Main control and signal source module;2# digital terminal& time division multiple access module;3# signal source encoding and decoding module;6# channel encoding and decoding module;7# time division multiplexing& time division switching module;8# base band transmission encoding and decoding module9# digital modulation and demodulation module;13# carrier synchronization and bit synchronization;21# PCM coding and decoding &voice terminal

 Contact :   Ms. Sally Zhao

                     Skype: xksally

                     Tel: 86-531-88771298

                      Shandong Xingke Intelligent Technology Co., Ltd.

                    ADD:4th Floor, No. 786 Xinluo Street, Gaoxin Zone,Jinan,Shandong,China.

                    Post code: 250101

                    Website: :810/

                                  http://sdxk.en.china.cn/