1550nm RF CATV Externally Modulated Fiber Optic Transmitter 45-1000 MHz

Description

The Thor Fiber Externally Modulated Optical Transmitter uses a high-power, low noise, narrow linewidth, continuous broadcast, and a DFB laser. It provides 4~10 way high linearity optical power output. It can connect 4~10 units high-power FTTB EDFA As this product comes standard without an EDFA, each optical port can output up to: CNR≥53.5dB, CTB≥-65dB, CTB≤-65dB. Furthermore you can easily communicate with this device using the RS232 communication interface with SNMP, plus it comes standard with a 1+1 power supply + hot-pluggable back up which helps avoid power damage. The SBS can reach 13 ~ 19dBm adjustable which is perfect for high-power EDFA applications. The External Modulator does not generate CSO distortion, so it can be used with an EDFA to be used a large coverage area and it's ideal for very-long trunk and local networks. Since Thor Fiber uses the best internal components our Optical Transmitters provide excellent APC, ACC and ATC control, while creating an ideal design that vastly improves ventilation and heat-dissipation so we can ensure a long life expectancy and expceptional reliability of the pump laser.

The LCD display is utilized in the vast majority of Thor Products which makes it easy to setup the unit quickly and efficiently, more so to check the status and performance of your externally modulated transmitter. This unit becomes even more tangible for large scale applications with the addition of EDFA's, which Thor Fiber offer's a wide variety of output power options for, to execute difficult and long haul applications to ensure that we can keep your clients connected to any sort of CATV, Phone, and Internet Triple Play Packages your company may offer. The wideband application for use in projects and industrial sized architectures make this a cost effective unit for any budget. Should you have any questions reach out to a Thor Fiber Design Engineer or Sales Executive to learn more about how we can help take your infrastructure to the next level.

Features

High-power, continuous wave DFB laser, which provides 4 way, 6 way, 8 way, 10 way high linearity standard optical power output, can be linked more FTTP EDFA.
Innovation SBS: 13 ~ 19dBm adjustable
Telecom class exceptional reliability and network management.
System Indicators: CNR≥53.5dB, CTB≥-65dB, CTB≤-65dB ( Without EDFA ).
Externally modulated no laser chirp, low dispersion distortion, large extinction ratio, 40 ~ 1000MHz band
Narrow linewidth(Typ. = 0.65MHz), low noise, DFB continuous wave laser, helps to reduce the dispersion.
The operating bandwidth is up to 47~1000MHz.
ITU standard wavelength, in the ± 200GHz (± 1.6nm) range can be adjusted.
AGC / MGC mode is optional at spot; OMI can be optimized at spot.
1+1 powers supply back, hot-pluggable functionality available.
Advanced SNMP network management function, perfect RS232 communicate interface.
Casing temperature auto-control.

Drawings

Model Selection

F-RF-1550-TX-EM-2 1550nm +2dBm output RF Transmitter
F-RF-1550-TX-EM-4 1550nm +4dBm output RF Transmitter
F-RF-1550-TX-EM-8 1550nm +8dBm output RF Transmitter

Specification

Performance			Index		Supplement
Optic feature	Operating wavelength	(nm)	1548~1563		HT8500M-CR
			1528.77~1563.86 ( ITU )
	Wavelength ADJ. range	(nm)	±1.6		±200GHz
	Wavelength ADJ. mode		±0.05nm stepping
	Wavelength stability	(Pm/°C)	-1~0		Tc=20~70°C
	Linewidth	(MHz)	Typ.=0.65		FWHM(?λ), (-3dB full width)
	Side mode suppression ratio	(dB)	≥45		SMSR
	Equivalent noise intensity	(dB/Hz)	≤-160		RIN ( 20~1000MHz )
	Number of output port		4
			6
			8
			10
	Each port output power	(dBm)	≥7.0
			≥4.5
	Return loss	(dB)	≥50
	Optical fiber connector		LC / APC
RF feature	Work bandwidth	(MHz)	47-862		Optional 47~1000MHz
	Input level K	(dBmV)	18~28		AGC
	Flatness	(dB)	≤±0.75		47~862MHz
			≤±1.5		862~1000MHz ( Optional )
	Return loss	(dB)	>16
	Input impedance	(Ω)	75
	RF connector		F-Female
Link feature	Transmit channel		PAL-D / 60CH	PAL-D / 99CH
	CNR1	(dB)	≥53.5	≥52.0	Back to back
	CNR2	(dB)	≥52.0	≥50.0	65Km optical fiber, 0dBm receive
	CTB	(dB)	≤-65	≤-65
	CSO	(dB)	≤-65	≤-65
	SBS restrain	(dBm)	13~19		Adjustable
General feature	SNMP network management interface		RJ45
	Communication interface		RS232
	Power supply	(VAC)	90~265VAC		50 / 60Hz
		(VDC)	-48		30~72
	Power Consume	(W)	≤50		Single power works
	Operating temp.	(°C)	-5~65		Machine temp. control automatically
	Storage temp.	(°C)	-40~85
	Relative humidity	(%)	5~95
	Size (W)x(D)x(H)		19×15.2×1.75 ( " ) 483×386×44 ( mm )		S-Type
			19×17.9×1.75 ( " ) 483×455×44 ( mm )		L-Type

Question and Answers

Question:
I'm from Brazil, I'm ISP fiber optic provider, I'm wanting to implement CATV. this device: "1550nm RF Over Fiber Tx 45-870 MHz 2 -16 mW" How many channels does it tune? Example, will I have to have one such device per channel? How much? How do I buy? I await an answer. Thank you. Second question : I understand, I plugged the RF antenna and it picks up all the programs (channel) and passes it to the fiber. In the client, I use a device or ONU with CATV. That's exactly what I'm looking for! I'm going to use multipoint, my fiber is single mode. I use some OLON EPON V-SOL v1600d8, 1:64 ratio. My division is 1x4 primary splitter and 1x16 secondary. The average signal at the customer's home is -18dbm. Am I going to need an amplifier for CATV?

Answer:
it will take and convert all you CATV RF Analog or Digital channels from 45-1000mhz. This is an RF over Fiber device, to which you can put a coaxial cable into the unit with all programs between 45-870Mhz; this unit will convert the RF signal to Fiber, and then on the receiver side, will convert all the programs from fiber back to Coaxial cable. You will also need a fiber optic receiver as well: https://thorbroadcast.com/product/rf-catv-mini-optical-receiver.html https://thorbroadcast.com/product/catv-rf-fiber-receiver-high-rf-power-rack-8230.html This product does not "tune" channels, this is a device to send CATV over fiber optic cable. What is fiber optic distance? Do you have single mode fiber? Is it point to point or point to the multipoint application? do you want to use it with the optical splitter? Second answer : In your case when you use a 1x4 and then a 1x16 optical splitter you insertion loss is 7.5 + 13.5 = 21db, you would need to use 1550nm 8Mw CATV RF transmitter together with the 24db EDFA amplifier. Depends on the fiber distance after the splitter. This is the link to the transmitter : https://thorbroadcast.com/product/1550nm-rf-over-fiber-tx-45-870-mhz-2-16-mw.html this is the link to the EDFA: https://thorbroadcast.com/product/24-dbm-edfa-optical-amplifier.html One more question, What is the fiber distance after the 1x16 slitter?

Question:

I am looking for a cable TV optical transmitter 1550 FTTX transmitter IN: RF and 20 DB optical output.

Answer:

Currently, we only have 1550 Transmitters available in 8mW. However, you can pair this with an EDFA (Erbium-Doped Fiber Amplifier) for stronger output power, which is the usual practice.

We have two different types of CATV 1550nm TX's available. The first is the external modulated type, which is used for long-distance transmission

F-RF-1550-TX-EM-2

Internal modulated transmitted , could be use up to 15Km

F-RF-1550-TX-8mW

https://thorbroadcast.com/product/1550nm-rf-over-fiber-tx-45-870-mhz-2-16-mw.html

Ths is link to the 20db EDFA fiber amplifier

F-EDFA-20

https://thorbroadcast.com/product/20-dbm-edfa-optical-amplifier.html

this is the application drawing example r 15510nm :

You would need that 20dB because you are most likely using optical splitters. If your total distance doesn't exceed 15km, you could use an internal modulated TX. However, if the distance is greater, I would recommend using an external modulated TX.

Documents

catv-rf-conversions-of-power-chart-75o-dbmv-dbuv-dbm-8230

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1550nm Externaly Modulated CATV RF Transmitter - Analog or QAM or ATSC CATV RF Over Fiber