Optical Receiver node CATV with AGC & RFOG Return Path

Description

Achieve crystal-clear signal stability and banish reverse noise for good. This FTTH CATV Optical Receiver Node is engineered to solve your two biggest HFC network headaches. First, the intelligent AGC (Automatic Level Control) ensures a constant, rock-solid 78 dBuV output even when input optical power fluctuates between -8 and 0 dBm. This means no more signal fading or service calls due to power variance. Second, the RFOG return path uses smart burst-mode laser control, allowing only one optical node to talk to your CMTS at a time. For you, this translates to a dramatic reduction in reverse link noise, upstream interference, and latency issues. Whether you are upgrading a fiber-deep network or deploying new FTTH apartments, this receiver delivers the pristine forward path and quiet return path that digital TV and high-speed data demand.

Optical Receiver Node Specification

Test condition ：59 routes PAL－D channel，3.8% modulation degree，-1dBm optical power receiving.

　　 System index：

　　C/N≥51dB

        C/CSO≥60dB

        C/CTB≥65dB

      Optical index：

　　Operating wavelength：1550±10 nm

        Input power：-9～+2 dBm

　　Junctor：　SC/APC

　　Return loss：≥45dB

　　RF index：

　　Working bandwidth：87～1218 MHz

        Output level：78 dBuV (@ optical input-8～0dBm)

        Flatness：±2dB

        Reflection loss：≥14dB

Return path optical receiver

  Optical index:

　　Operating wavelength：1310 nm

        Optical transmitter power：2mW

        Laser opening threshold：85dBuV（5～65MHz,aggregate capacity）

        Laser closing threshold：70dBuV（5～65MHz,aggregate capacity）

    RF index：

　　Working bandwidth：5～65MHz

        Flatness：±1.5dB

        Reflection loss：≥16dB

Universal parameter

Output impedence：75Ω

Connector：F style inch

  Working temperature：-10～＋50℃

    Outside dimensions：100*102*27 mm

Power adapter，input AC 100～240V，output DC 5V。

Schematic Diagram

Installation, debugging instructions

1) Install the machine in the shell through the installation holes on both sides of the shell.

2) Connecting fiber. Be sure to clean the end face of the fiber head before connecting. And be sure to test whether the optical input signal is within the required optical input range. The maximum input light power of this machine must not exceed 3dbm.

3) Power supply and the indicating light turn on, indicating that the power supply is normal.

4) Forward optical receiving indicator：Lights up in the AGC range and extinguishes beyond the AGC range.

5) Return path optical receiving indicator：When there is a return path signal input and reaches the open laser threshold, it turns on. When there is no return path signal input or when the signal is below the laser threshold, it will go out. Since the return path signal is discontinuous, the return path optical indicator will flash.

Note：The light signal is invisible laser beam, exposure to the eye directly may cause permanent injury.

Optical Receiver Node Accessories

RFOG            1

Power Adapter   1

Product Manual   1