Description

INFORMATION

Overview

The device is a building indoor optical receiver. Optical forward receiver with AGC automatic level control function. When input optical power among -8～0dBm, the constant output level is 78 dbuv.

The return path of this receiver uses RFOG technology. The reverse laser controls the “burst” mode of the optical node by detecting the input CM signal, thus allowing only one optical node to communicate with the CMTS at any given point in time, thus greatly improving the reverse link noise.

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.

5.Accessories

RFOG            1

Power Adapter   1

   Product Manual   1