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.
• 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.
Wavelengt (nm) 1548~1563
Linewidth (MHz) <1 FWHM
Side mode suppression
ratio (dB) >45 SMSR
Extinction ratio(dB) >20 XP
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
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
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
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
humidity (%) 5~95
Size (") 19×10×1.75 (W)x(D)x(H)