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CATV RF Over Fiber



CATV RF Optical Receiver

Tech Specs
Application Drawing

The QuestTel's L-RF-MN-RX module optical receivers are versatile, low-cost and compact optical receivers for use in HFC fiber applications. It is perfect solution for the transport and distribution of CATV RF signals over fiber optic cable. The L-RF-MN-RX module housed in a small housing and have adjustable RF output level. May be used as a hand held device for testing, or placed at a customers premise for the reception of cable television services. The Receiver is designed to operate with a very low optical input level between the range of +3dBm to -12dBm.


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CATV RF Optical Receiver

Price: $ 450.00


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    • Extra-low noise(3.8% modulate, -10dBm receive, CNR ≥ 45dB)
    • Optical Automatic Gate Control (AGC)
    • Wide dynamic receiving optical power range: within Pin=-15, MER≥36.8dB
    • Can save a large number of optical power resource, greatly reduce the Network configuration cost
    • Manual Gain Control (MGC) for optimal RF output level control
    • Optical signals in either 1310nm or 1550nm band's.
    • In the range of 40~862MHz, all have good flatness (FL ≤± 0.75dB)
    • All working parameters controlled by a microprocessor
    • Metal shell, supply safeguards to opto-electrical sensing device
    • High output level can supply for many users
    • Low power consumption, high cost performance
Tech Specs
Optical Parameters - RX  
 CATV Work Wavelength  1310 - 1568 nm
 Linewidth  < 1 MHz   FWHM
 Return Loss  > 55 dB
 Side Mode Suppression Ratio  > 45 dB   SMSR
 Optical Fiber Connector  SC/APC Standard
 RF Parameters  
 Work Bandwidth  45 - 862 MHz
 Input Level  19 - 21 dBmV   MGC
 Return Loss  > 16 dB
 Flatness  <± 0.75    45 - 862 MHz
 Input Impedance  75 Ohm   RF Input
 RF Interface  F-Type (Female)
Link Parameters  
 Transmit Channel  PAL-D/60CH     NTSC/80CH
 CNR  > 50 dB   on 10Km optical fiber
 CSO  < -57 dB
 CTB  < -63 dB
 SBC restrain  > 17 dBm
 General Parameters  
 Power supply  12V DC
 Work temp  -20°C ~ 55°C 
 Storage temp  -40°C ~ 85°C
 Work relative temp

 5 ~ 95 (%)


L-RF-MN-RX RF Over Fiber  Pdf User Guide 

 Disclaimer: Products, specifications and data are subject to change without notice, to improve reliability, function, design or otherwise.



How RF over Fiber Links Work


Converting  RF signals into light, then transporting the optical signal over fiber optic cable, is a complex process which requires a high degree of technical expertise. Incoming RF signals from the antenna or signal source are fed into QuestTel's RF over Fiber Transmitter Module via the 75 Ohm RF connector. The Module contains RF signal conditioning and provides complex impedance matching between 75 Ohm input impedance and the Laser, Laser  Control, APC, Monitoring and Alarm electronics. The Transmitter Module utilizes an Intensity Modulation scheme to convert RF signals into light. This modulated light is then transported through an optical fiber to the QuestTel's RF over Fiber Optical Receiver Module. The Receiver Module converts the modulated light back into an RF signal. The recovered RF signal is again complex impedance matched and amplified before it becomes available at the output of the Receiver Module.

QuestTel shall have no liability for any error or damage of any kind resulting from the use of this document.
Application Drawing CATV RF Optical Receiver's Application Drawing
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