Downstream Two-way Optical Receiving Unit GSB821

Two-way optical receiving With main backup automatic switching function High sensitive optical power receiving Both MGC/AGC

Features

1.      Two-way optical receiving,   with main backup automatic switching function;   

2.      High sensitive optical power receiving, broad dynastic range,high-performance RF output;

3.      Both MGC and AGC operation mode support the alarming function;

4.      Advanced national network module, remote control, intelligent management;

5.      Remote/Local accurate attenuation  setting;

6.      Excellent optical receiving module, RF amplifier module, excellent indication;

7.      Module design,  plug-in installment;

8.      LED polite lamp on front panel;

Technical  Specification  

Item		Parameter	Remark
Input optical power range		-4 dBm~+3 dBm
Optical return loss		>45 dB	SJ/T  10663-1995
Equivalent input noise current		≤8 PA/	SJ/T 10663-1995
Standard optical wave		1310 nm, 1550 nm
Optical connection type		SC/APC or FC/APC
Frequency range		47 MHz~862 MHz
Flatness		±0.75 dB	Optical receiving power -1dBm
RF output signal level		≥102 dBμv	Optical receiving power -1dBm
Output port testing level		-20 dB±1 dB
Nonlinearity distortion(Remark)	C/CTB	≥75 dB	GY/T-143-2000-6.2.7
	C/CSO	≥70  dB	GY/T-143-2000-6.2.7
C/N		≥50 dB
RF output impendence		75Ω
RF output return loss		≥16 dB	GB/T11318.1
AGC input optical power range		-3.5 dBm~ +3 dBm
Recommend output optical power		-3 dBm~ +1 dBm

Downstream Two-way Optical Receiving Unit GSB821