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1550nm TFT1550M optical transmitter

TFT1550M series transmitter is designed according to GY/T 143-2000 "CATV system transmitter and receiver network technology condition and measurement ...

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1550nm TFT1550M optical transmitter


Overview        TFT1550M series transmitter is designed according to GY/T 143-2000 "CATV system transmitter and receiver network technology condition and measurement method" standard. It is specially designed for CATV optical fiber transmission system, and is used to transmit cable TV signal. It uses the standard 19 inch rack mounting design, simple AC 220V, 50Hz power supply. The only input signal is the RF signal to be transmitted. Features         ● Using high performance microprocessors for equipment monitoring and data exchange;
        ● Excellent APC (automatic power control), ATC (automatic temperature control) function, to ensure the stability of laser output power and long life of the laser;
        ● Optional 1000MHz working bandwidth;
        ● Common or Optional dispersion compensation type, exclusive patent protection of dispersion compensation module, to ensure that the transmission distance of up to 50km, still has excellent indicators and performance, 5km step, flexible application (Default is common type. dispersion compensation function needs additional price).
        ● Perfect protection circuit (boot delay protection, working status indication and alarm, RF over excitation shutdown and alarm, etc.);
        ● Real time LCD display laser operating state parameters, module operation parameters (module temperature, input level, etc.) and display;
        ● High quality RF excitation circuit, MGC adjustable range up to 20dB, can adapt to a wide range of RF input signal;
        ● Good low power design and whole machine heat treatment, ensure the long-term reliability of the equipment.
        ● Support the RF signal through the main control interface for each channel average power display (default channel number is 99, can be set anywhere between 1~99) and the total power display (channel number is set to 1);
        ● The perfect LCD display control and RJ45 network management status monitoring interface, built-in network management unit, support SNMP network management, can be convenient for local computer monitoring.
        ● The excellent cooling design of the whole machine ensures the long term reliability of the equipment. Technical Specifications        Wavelength: 1550±10nm
       Optical connector: FC/APC or SC/APC
       Optical reflection loss: >45.0dB

Radio frequency pass band

47～860 / 1000 MHz

RF input signal level

75～85dBuV / CH @ 60CHs PAL-DAnalog channel or 70～80dBuV / CH @118CHs 256QAM Digital channel(Note 1)

Nominal RF input impedance

75Ω

RF input reflection loss

>16dB

Flatness

±1dB

Excitation level detection

-20dB

Input port isolation

≥50dB

MER

≥37(Note 2)

Dimension

W×L×H     440×370×44mm

N.W.

5kg

Power Supply

～220V±10%   50Hz  20W

Working environment temperature

0℃～50℃

Storage temperature

-25℃～+65℃

Power Consumption

20W


       Note 1:118 256QAM digital channel input, input level 75 + 5dBuV, laser modulation system is about 32%;
       Note 2:MER test in case of meeting the predicted link (25Km or more optical fiber) and receiving -6dBm.
       The MER value is a typical value that is loaded by 118 256QAM digital channels within 1000MHz, regardless of the distortion contribution of the receiver.