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Optical
Transmission->PAYKE TASVIR 4 |
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Payke Tasvir 4
The FM Optic System
provides a Cost Effective and Reliable solution for Long Haul
Transmission (Up to 50 Km) of high quality Video, Audios application. In
Transmitter module, the four Analog Audios Inputs converted to Digital
and Multiplexed into 2Mbit/s steam, then modulated by 10.7MHz IF
Carrier. The Audios Carrier combined with the Analog Video Input, FM
modulated into 70MHz Carrier, and then Intensity Modulated into Optical
Laser Output. The laser intensity maintains Constant by using
optoelectronic feedback loop. The light signal is coupled into a
single-mode fiber pigtail. In Receiver module, the light signal received
via multi-mode fiber converted to electrical by sensitive PIN photo
diode, amplified with low noise circuit, automatic gain controlled,
demodulated from 70 MHz carrier, separate Video/ Audio carrier signal,
filtering and amplifying video signal to obtain level and specific
requirements. The Audios Sub-Carrier 10.7 MHz shall be demodulated to
2Mbit/sec, multiplexing the four digital audio signals, and then
converted to high quality analog outputs.
Video/Audio inputs/outputs, Optical input/ output connector, with power
plug are located in the rear panel.
Key, Volume, and Display used to adjust audio level outputs for receiver
side, whereas listens in via stereo-jack and Tx/Rx/Video state
Indicators in the Tx/Rx front panel.
Features
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-10dbm Optical Transmitter diode via single-mode
fiber
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-10dbm to -27dbm Optical Receiver sensitivity
via multi-mode fiber
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Analog 70MHz FM Modulation, Optical Intensity
Modulation (IM-FM)
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High
Quality Digital Audios Converter
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Adjustable Audios/Video Receiver level
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AC
main or 48V DC Inputs Supply
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1RU
Structure for Tx,
Rx
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