quick overview :

Features of Optical Fibers Communication Trainer: Textbook includes the theoretical & practical details Textbook includes the expected results for reference Problem discussion attached together with answers for instructor Only need Oscilloscope & Spectrum analyzer to obtain the measured results ( not included ) Specifications :  Module One : Transmitter Module   Transmitted light wavelength : 660 nm  &  820 nm Data rate : 1 Mbps Transmitter bandwidth : 1 MHz Includes digital & analog transmitter,  and  also covers with E/O conversion circuit Built in microphone input terminal and audio amplifier Built in sine wave output signal, and also includes tunable amplitude and frequency output Amplitude : 2Vpp,  Frequency : 100Hz ~ 2.5KHz Built in digital data generator, used to produce TTL signal & CMOS level output The wavelength of optical fibers transmission line : 500nm ~ 1200nm; ST & DIN connectors Module Two : Receiver  Received light wavelength : 660 nm & 820 nm Data rate : 1 Mbps Transmitter bandwidth : 1 MHz Includes digital & analog receiver, and also covers with E/O conversion circuit Provided with tunable amplifier, which can drive the 8 ohm loud speakers The wavelength of optical fibers transmission line : 500nm ~ 1200nm; ST & DIN connectors Module Three : Computer Control Module  Transmitter interface : RS-232 Transmission baud rate : 9600bps Type of display : LCD 16x2 characters Ability to display numerals and English characters Input interface : 4 x 4 keypad  Serial characters can be inputted from keypad Includes data transmission operations software The operation software environment : Windows Keypad switch provides with normal open type Provides with LED indicator function  Module Four : Analog and Digital Signal Modulations Module   AM Modulation & Demodulation : (1) AM Modulation : Carrier signal : 540KHz ~ 1600KHz Audio frequency signal : 1KHz ~ 2KHz (2) AM Demodulation : Carrier signal : 540KHz ~ 1600KHz Audio frequency signal : 1KHz ~ 2KHz Modulation index : 50% FM Modulation & Demodulation : (1) FM Modulation : Carrier signal : 20 KHz Audio frequency signal : 1KHz ~ 5KHz (2) FM Demodulation :  Nature frequency : 20 KHz Audio frequency signal : 1KHz ~ 3KHz ASK Modulation & Demodulation :  (1) ASK Modulation : Carrier signal : 20 KHz ~ 100KHz Data signal : 100bps ~ 1kbps (2) ASK Demodulation : Carrier signal : 20 KHz ~ 100KHz    Data signal : 100bps ~ 1kbps FSK Modulation & Demodulation : (1) FSK Modulation : Space  signal : 1370 Hz Mark  signal : 870 Hz Data  signal : 100bps ~ 500bps (2) FSK Demodulation : Space  signal : 1370 Hz Mark  signal : 870 Hz Data  signal : 100bps ~ 500bps Module Five : Digital Signal Processing Module   (1) Signal Source Encoder & Decoder (CVSD) : Sampling frequency : 16KHz ~ 50KHz Audio frequency signal : 100Hz ~ 2KHz TTL input & output level signals (2) Channel Encoder & Decoder (Manchester) : Input TTL level signal CLK : 500Hz ~ 1KHz Data Rate : 250bps ~ 500bps Module Six : TV Signal Modulator and Demodulator  (1) TV Signal Generator : Built in 4 MHz quartz crystal oscillator 8 selected types of TV signal Output signal : ladder wave signal Output frequency : 15.6 KHz (2)   TV Signal Modulator : Audio signal : FM demodulating signal FM carrier signal : 5.5 MHz Built in low pass filter to remove the noise of the audio signal (3) TV Signal De-Modulator : Audio signal : FM demodulating signal FM carrier signal : 5.5 MHz Built in audio signal generator, output frequency : 100Hz ~ 1KHz, output amplitude : 600mV ~ 1.2 V Function Generator   Ports : Two signal outputs ports Frequency range : 10Hz ~ 100KHz 100Hz ~ 1MHz Waveforms : Sine, Triangle, Square, TTL Plus Amplitude : 10Vpp Built In 6 digit frequency counter Large 0.5 LED / LCD display Overload protection D C POWER SUPPLY Triple bipolar voltage outputs Consultant voltage operation Low ripple & noise Constant voltage output : ±5V, ±12V Variable voltage output : 0V ~ ±15V