Máy thu CATV quang ZHT FTTH1021-TB Mini Optical Fiber Node

Model RFoG, sử dụng cho mạng quang;
Tích hợp công nghệ CWDM và quang;
Ở đường về giảm thiểu tối đa tạp âm tích lũy ở trên sợi quang về đến trạm Hub đối với khoảng cách lớn, tăng tỷ số tín/ tạp.
Bên trong có nguồn chuyển mạch.

Thông số kỹ thuật:

Downstream (RF)

Parameter	Unit	Min	Typical	Max	Note
Frequency Range	MHz	54		1002	note1
Flatness	dB		±0.5	±0.75
Output Level	dBmV	20
CNR	dBc		52		note2
CSO	dBc		-67		note2
CTB	dBc		-65		note2
CM	dBc		-65		note2
Group Delay	ns			15	55.25MHz 3.58MHz span
Return Loss	dB	16	18		F Type 75Ω
Monitor Level	dBc	-22	-20	-18

Laser

Wavelength	nm		1550
Input Power	dBm	-6		2
Optical Return Loss	dB	55	62
Monitor Power	mW/V	1±0.2	Test Point	Monitor Power	mW/V
State	Green	Optic Power≥-6dBm			LED
	Red	Optic Power＜-6dBm

Upstream (RF)

Parameter	Unit	Min	Typical	Max	Note
Frequency Range	MHz	5		42
Flatness	±dB		±0.5	±0.75
Return Loss	dB	16	18		F-Shape75Ω
Monitor Power	-dBc	-22	-20	-18
Input Level	dBμV	81 (-47dBmV/Hz)			2 NTSC Channel

Laser

Optic power	mW	1	2
Burst Level	dBμV	70
CNR	dBc		50		note3
2nd Intermodulation	dBc		-55		note3
3rd Intermodulation	dBc		-58		note3
Optical Return Loss	dB	55	62
State	Green	Laser Operation ok			LED
	Red	Output Power Fall 50%
Power Inspection	Vdc/mW	1±0.2			Test Point

Optical branching device

Wavelength	nm	1310 & 1550
Main Port		75%	Optional
Optical Tap port		25%

General parameter

RF Ports	F-shape 75Ω
Optic Connector	SC/APC
Operate Temperature	From -30℃ to +50℃
Power Supply	12VDC   500mA	By power adapter
Surge Withstand	0.5µs-100KHz ring wave 6kV/200A	RF IN/OUT ports
Measurement	128×112×32 mm

Note:1.The Frequency range of transmitter same, must 54-1002MHz.
         2. OMI / ch be 3.5%/ch and Optic input -1dBm.
         3. 2 NTSC channel loading, 7dB Fiber link.Functional Block Diagram
(1310nm＋1550nm WDM with Optical bypass)