F-RF-TX 1550nm Direct Modulated AGC Optical Transmitter (CATV RF over Fiber)

F-RF-TX  1550nm Direct Modulated AGC Optical Transmitter (CATV RF over Fiber)
 The F-RF-TX transmitter is used to transmit RF cable TV signals (45-870MHz) over a fiber optic cable. By converting the RF band to an optical signal the transmission distance can be increased to over 120 km.  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 F-RF-TX 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 circuity. The F-RF-TX 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. Our RF transmitter units feature dual power supplies for added fault protection.  All operating parameters of the F-RF-TX series transmitters are designed for high reliability and suitable for even the most high end applications.

Product 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.

F-RF-TX 1550nm Direct Modulated AGC Optical Transmitter (CATV RF over Fiber)


Performance                 Index                                       

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

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 

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     

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)