Model No.: OFCT-17900

Features:
1. Textbook includes the theoretical and practical details.
2. Textbook includes the expected results for reference.
3. Problem discussion attached together with answers for instructor.
4. Only need oscilloscope and spectrum analyzer to obtain the measured results.

Specifications:
Module One: Transmitter Module
1. Transmitted light wavelength: 660 nm and 820 nm.
2. Data rate: 1 Mbps.
3. Transmitter bandwidth: 1 MHz.
4. Includes digital and analog transmitters, and also covers E/O conversion circuit.
5. Built-in microphone input terminal and audio amplifier.
6. Built-in sine wave output signal, and also includes tuneable amplitude and frequency output.
Amplitude: 2 Vpp; Frequency: 100 Hz ~ 2.5 kHz.
7. Built-in digital data generator, used to produce TTL signals and CMOS level output.
8. The wavelength of optical fibers transmission line: 500 nm ~ 1200 nm; ST and DIN connectors.

Module Two: Receiver Module
1. Received light wavelength: 660 nm and 820 nm.
2. Data rate: 1 Mbps.
3. Receiver bandwidth: 1 MHz.
4. Includes digital and analog receivers, and also covers O/E conversion circuit.
5. Provided with tuneable amplifier, which can drive the 8 W speaker.
6. The wavelength of optical fibers transmission line: 500 nm ~ 1200 nm; ST and DIN connectors.

Module Three: Computer Control Module
1. Transmission interface: RS-232.
2. Transmission Baud rate: 9600 bps.
3. Type of display: LCD16X2 characters.
4. Ability to display numerals and English characters.
5. Input interface: 4X4 keypad.
6. Serial characters can be inputted from keypad.
7. Includes data transmission operation software.
8. The operation software environment: Windows.
9. Keypad switch provides with normal open type.
10. Provides with LED indicator function.

Module Four: Analog and Digital Signal Modulations Module
1. AM Modulation and Demodulation
(1) AM Modulation:
a. Carrier Signal: 540 kHz ~ 1600 kHz.
b. Audio Frequency Signal: 1 kHz ~ 2 kHz.
(2) AM Demodulation:
a. Carrier Signal: 540 kHz ~ 1600 kHz.
b. Audio Frequency Signal: 1 kHz ~ 2 kHz.
c. Modulation Index: 50%.
2. FM Modulation and Demodulation:
(1) FM Modulation:
a. Carrier Signal: 20 kHz.
b. Audio Frequency Signal: 1 kHz ~ 5 kHz.
(2) FM Demodulation:
a. Nature Frequency: 20 kHz.
b. Audio Frequency Signal: 1kHz ~ 3 kHz.
3. ASK Modulation and Demodulation
(1) ASK Modulation:
a. Carrier Signal: 20 kHz ~100 kHz.
b. Data Signal: 100 bps ~ 1 kbps.
(2) ASK Demodulation:
a. Carrier Signal: 20 kHz ~ 100 kHz.
b. Data Signal: 100 bps ~ 1 kbps.
4.FSK Modulation and Demodulation
(1) FSK Modulation:
a. Space Signal: 1370 Hz.
b. Mark Signal: 870 Hz.
c. Data Signal: 100bps ~ 500 bps.
(2) FSK Demodulation:
a. Space Signal: 1370 Hz.
b. Mark Signal: 870 Hz.
c. Data Signal: 100 bps ~ 500 bps.

Module Five: Digital Signal Processing Module
(1) Signal Source Encoder and Decoder (CVSD)
a. Sampling Frequency: 16 kHz ~ 50 kHz.
b. Audio Frequency Signal: 100 Hz ~ 2 kHz.
c. TTL input and output level signals.
(2) Channel Encoder and Decoder (Manchester)
a. Input TTL level signal.
b. CLK: 500 Hz~1 kHz.
c. Data Rate: 250 bps~500 bps.

Module Six: TV Signal Modulator and Demodulator
(1) TV Signal Generator:
a. Built-in 4 MHz quartz crystal oscillator.
b. 8 selected types of TV signal.
c. Output signal: ladder wave signal.
d. Output frequency: 15.6 kHz.
(2) TV Signal Demodulator:
a. Audio signal: FM demodulating signal.
b. FM carrier signal: 5.5 MHz.
c. Horizontal signal is demodulated by using the band-reject filter.
d. Built-in low-pass filter to remove the noise of the audio signal.
(3) TV Signal Modulator:
a. Audio signal: FM modulating signal.
b. FM carrier signal: 5.5 MHz.
c. Built-in audio signal generator. Output frequency: 100Hz ~ 1 kHz; Output amplitude: 600 mV ~ 1.2V.
d. TV Signal: FM signal plus TV system horizontal signal.

Optional Function Generator/ Power Supply module: FG-17202
Power Supply: 4 fixed voltage outputs(+/- 5V, +/- 12V), 2 variablevoltage outputs (+/- 0 ~15 V)
Low ripple and noise
Function Generator:
Output: 2 CHs
Frequency Range: 10 Hz ~ 100 KHz, 100Hz ~ 1 MHz
Waveforms: TTL pulse, Square, Triangle, and Sinewave
Amplitude: 10 Vp-p
2 built-in 6-digit frequency counters
Overload protection

* Oscilloscope, function generator, power supply are not included.