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Specifications of Optical Fibers Communication Trainer
(ETEK OFC-9000)
Module One: OFC-9000-01
Chapter 1: Optical Fibers Transmitter
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 with E/O conversion circuit.
5. Built-in microphone input terminal and audio amplifier.
6. Built-in sine wave output signal, and also includes tunable amplitude and frequency output.
Amplitude: 2 Vpp; Frequency: 100 Hz ~ 2.5 kHz.
7. Built-in digital data generator, used to produce TTL signal and CMOS level output.
8. The wavelength of optical fibers
Transmission line: 500 nm ~ 1200 nm; ST and DIN connectors.
Module Two: OFC-9000-02
Chapter 2: Optical Fibers Receiver
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 with
O/E conversion circuit.
5. Provided with tunable amplifier,
Which can drive the 8 W loud speaker.
6. The wavelength of optical fibers
Transmission line: 500 nm ~ 1200 nm; ST and DIN connectors.
Module Three: OFC-9000-03
Chapter 3: Optical Fibers Data Communication Controller
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.
Specifications of Optical Fibers Communication Trainer
(ETEK OFC-9000)
Module Four: OFC-9000-04
Chapter 4: AM and ASK Modulator and Demodulator
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. 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.
Chapter 5: FM and FSK Modulator and Demodulator
1. 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: 1 kHz ~ 3 kHz.
2. 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.
Specifications of Optical Fibers Communication Trainer
(ETEK OFC-9000)
Module Five: OFC-9000-05
Chapter 6: CVSD Encoder and Decoder
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.
Chapter 7: Manchester Encoder and Decoder
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: OFC-9000-06
Chapter 8: 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 Modulator
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: 100 Hz ~ 1 kHz;
Output amplitude: 600 mV ~ 1.2 V.
(4) TV Signal: FM signal plus TV system horizontal signal.