Cable TV Band RF over Fiber Transmitter

The CL-870-T transmitter is used to transmit RF cable TV signals (45-870MHz) over a fibre optic cable. By converting the RF band to an optical signal the transmission distance can be increased to over 120Km. The transmitter uses external modulation technology with a direct current laser. This results in no laser chirp, low dispersion distortion, a large extinction ratio, and high speed signal transfer. The CL-870-T features an easy to read front panel LCD screen that displays relative operating status and fault information. The unit implements a high linearity DFB laser, and features built in pre-distortion adjustment circuit. The CL-870-T direct modulated optical transmitter can be used in FTTx (10Km) of second-grade service area (Sub-HE) and can also be used in WDM narrow-band multiplexing and IP/QAM. All operating parameters of the CL-870-T series transmitters are designed for high reliability and suitable for even the most high end applications.

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Features

• Low chirp, high linearity DFB laser, chirp compensation.

• Dual module RF driver , high efficient laser pre-distortion adjustment.

• Full-automatic OMI control, AGC & MGC.

• Intuitionistic modulation status display.

• Built-in dual back-up power supply that switch automatically.

• Casing temperature auto-control, ensure the long life of the laser.

Example Aplication

Model Selection

CL-870-T	1310nm Direct Modulated AGC Optical Transmitter
CL-870-T-15	1550nm Direct Modulated AGC Optical Transmitter
CL-870-R	Optical CATV RF Reciever with single optical input
CL-870-R-2F	Optical CATV RF Reciever with Dual optical input and dual power supply

Specifications

Aplications:	Optic feature Wavelengt (nm) 1548~1563 Linewidth (MHz) <1 FWHM Side mode suppression ratio (dB) >45 SMSR Extinction ratio(dB) >20 XP Equivalent noise intensity(dB/Hz) <-160 RIN (20~1000MHz) Output power (mW) 6 Optional 3, 10 Return loss (dB) ≥ >55 Optical fiber connector SC/APC Optional FC/APC
Standars:	RF feature Work bandwidth (MHz) 45-862 Input level (dBmV) 19~21 MGC Flatness (dB) ≤ <±0.75 45~862MHz Return loss (dB) >16 Input impedance (OhmΩ) 75 RF/INPUT RF interface F type Optional imperial
Connection Ports:	Link feature Transmit channel PAL-D/60CH NTSC/80CH CNR (dB) ≥ >50 10Km optical fiber, 0dBm receive CTB (dB) ≤ <-63 CSO (dB) ≤ <-57 SBC restrain(dBm) >17
Ports:	General feature Network management interface RJ45, RS232 Support I.E. & SNMP Power supply (V) 90~265VAC -48VDC optional(30~60VDC) Power Consume (W) ≤ <50 Single power works Work temp. (C℃) -5~65 Machine temp. control automatically Storage temp. (C℃) -40~85 Operating relative humidity (%) 5~95 Size (") 19×10×1.75 (W)x(D)x(H)