Specification :

I. Product Features
( 1) Advanced technology: Modern communication technology innovative experiment system adopts development platform of “ DSP+ FPGA� , on which, it realizes ( several communication systems, ) such systems as digital base band transmission system, digital frequency band transmission system, digital programmable control switching system, CDMA mobile communication system as well as analog modulation system, and etc.
( 2) Powerful function: use communication system to be series with communication principle’ s eleven technologies, such as speech coding technology, base band transmission technology, multiplex technology, analog modulation and demodulation technology, digital modulation and demodulation technology, synchronization technology, error-correcting code technology, interface technology, spread spectrum technology, duplex technology and exchange technology and etc.
( 3) Advanced structural design: adopt embedded modularization design. All modules are uniform size, flexible structure, and convenient upgrade. Users could block-building choose the needed modules according to their own requirements.
( 4) Abundant secondary development experiments: It could not only complete a large quantity of experiments for unit and system, but also experiments for secondary development and courses design, which could be the platforms of course design, graduation design, electronic design competition. The experiment system has four specialized secondary development module: single-chip computer secondary development module ( C8051F series single-chip computer) , CPLD secondary development module ( MAX3000A series CPLD) , DSP secondary development module ( TMS54XX series DSP) , ARM secondary development module ( LPC2000 series ARM7) , which could offer 41 secondary development experiments all together.
( 5) Combination of hardware and software reflects the development tendency of experiment teaching: students emulate and calculate data or waveforms by software, such as QuartusII, Keil, CCS, ADS1.2 and etc, then physical verify, finally develop with their own hands, which reflects experiment teaching’ s development tendency.
( 6) Sole innovative experiment module: GPRS module ( self-equipped GSM network and SIM card ) and wireless transceiver could open experiments contents with design, application, research, which could enlighten students’ innovative thinking, but also broaden their horizons, and improve their comprehensive design ability.
( 7) Adopt plexiglass baffle for protection

II. Performance parameters
( 1) AC, DC power supply
Input: AC 220V± 10%
Output: DC + 5V/ 3V, + 12V/ 1A, -12v / 0.5A
( 2) DDS analog signal source
DDS analog signal source output waveform’ s types, frequency, amplitude, and square wave duty ratio are all adjustable.
Sine wave output frequency range is 1Hz~ 200 KHz, amplitude range is 200mV~ 4V.
Triangular wave output frequency range is 1Hz~ 20 KHz, amplitude range is 200mV~ 4V.
Saw tooth wave output frequency range is 1Hz~ 20 KHz, amplitude range is 200mV~ 4V.
Square wave A output frequency range is 1Hz~ 50 KHz, amplitude range is 200mV~ 4V, duty ratio 50% is invariant.
Square wave B output frequency range is 1Hz~ 20 KHz, amplitude range is 200mV~ 4, duty ratio could be adjustable by 5% step, frequency output precision: f± 5%
( 3) Analog signal source
Analog speech signal source: speech input, speech output, match headphone with microphone to use
Point frequency sine wave output:
1KHz sine base wave: peak value 1V± 0.3V
2 KHz sine base wave: amplitude range 200mV~ 5V adjustable
192 KHz sine carrier : peak value 3.6V± 0.3V
384 KHz sine carrier: amplitude range 250mV~ 5V adjustable
( 4) Digital signal source
Square wave duty ratio: 50%
24.576M: 24.576MHz clock signal
2048 K: 2048 KHz square wave output
64 K: 64 KHz square wave output
32 K: 32 KHz square wave output
8 K: 8 KHz square wave output
NRZ: 24 digits NRZ code output, code rate is determined by “ code rate selection� dial code switch, code type is set by � NRZ code type selection� dial code switch.
BS: bit-synchronous signal output, square-wave frequency could be changed by “ code rate selection� dial code switch
2BS: 2 times bit-synchronous signal frequency’ s square-wave output, frequency could be changed by “ code rate selection� dial switch.
FS: Frame synchronizing signal output, narrow pulse, 24-bit codes are a frame, duty ratio 1/ 48.
PN15: m-sequence output of N= 15, code rate is determined by “ code rate selection� dial code switch.
PN31: m-sequence output of N= 31, code rate is determined by “ code rate selection� dial code switch.
PN511: m-sequence output of N= 511, code rate is determined by “ code rate selection� dial code switch.
( 5) Experiment kit host specification: 54cm× 38cm× 13cm
Module storage box specification: 38cm× 20cm× 13cm