L-RF-MN-RX
CATV RF Optical Receiver
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.
- 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
| 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 (%) |
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.
