Description

Portable 2mW CATV RF over Fiber Optical Transmitter 45-1000 MHz

Q: I have two buildings that are connected with a 1500' 3 pair multimode fiber optic cable. One location has cable TV and the other does not. I currently have one pair of fibers available and wanted to see if I can send the CATV signal through them.

Unfortunately, RF CATV can only be transmitted over single-mode fiber. Multimode creates too much dispersion and reflections, and the degradation is so severe and so fast that it is literally impossible to put the cable on multimode. Would it be possible for you to pull a strand of single-mode fiber? If possible, that product you selected would be an ideal fit for your project.

Q: I have a question about your RF over fiber products. I see that they all say you must use single-mode fiber with SC APC connectors. I was told by a systems integrator that there is a chance it will work on multimode, but it must be OM4 and under 3000 feet. Is this true? If so, what would the expected loss be?

The multimode fiber doesn't support CATV RF. The easiest way would be to install the single-mode fiber and use the following devices: Transmitter https://thorbroadcast.com/product/4-mw-catv-rf-over-fiber-tx-45-870-mhz.html Receiver https://thorbroadcast.com/product/catv-rf-fiber-receiver-high-rf-power-rack-8230.html or, if this is impossible, you can use RF to IP and IP to RF gateways. 16 QAM to IP https://thorbroadcast.com/product/16-rf-tuners-to-iptv-ts-qam-output.html IP to 16 QAM Ethernet over Fiber Converters: https://thorbroadcast.com/product/10-100-1000-mbps-fast-and-gigabit-ethernet-over-1-fiber-media-8230.html

Q: Now we have pulled RJ 6 cable to all the rooms. And also we have pulled OFC cable to all the rooms. The cable TV operator will give RF input to their set-top box, and from the set-top box, we have to take the audio-video signal to the TV. I have 6 rooms now. So please tell me what all things I have to buy from you for watching TV with different programs in different rooms. Please give your suggestions.

If you have Single-mode fiber in the rooms, You can use the following units point to multipoint RF over fiber equipment 8mw CATV RF Transmitter: F-RF-TX-8 https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html 1x8 fiber optic slitter ( 1x6 is not available) https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226 6 pcs CATV RF fiber-optic receivers https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html 8mw CATV RF Transmitter: F-RF-TX-8 https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html 1x8 fiber optic slitter ( 1x6 is not available) https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226 6 pcs CATV RF fiber optic receivers https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html

Q: I need a recommendation to transport 1 freq over fiber about 500 feet. Freq is 111 MHz. - 256 QAM - Kind of what I was thinking, just wanted clarification. Thank you. - Fabulous, thanks

So it's RF; what kind of RF? - https://thorbroadcast.com/product/thor-optical-mini-catv-rf-transmitter-45-1000mhz.html The receiver can be either of these https://thorbroadcast.com/product/thor-fiber-optical-mini-ftth-rf-catv-cable-tv-receiver-8230.html https://thorbroadcast.com/product/rf-catv-mini-optical-receiver.html - No problem. There are different types of RF; these particular units are specifically for QAM - It will transport the entire RF CATV range as well.

Q: I would like to replace an obsolete set from Force, Incorporated. It is the CATVLite VSB/AM Video Receiver part # 2801R-MCST (receiver) and its compatible transmitter, the 2801T-MCST for wavelength 1310nm. We are transmitting an analog TV signal over multi-mode fiber. Will this be able to replace that? Thank you.

CATV and RF in general have to be sent over Single Mode Fiber. Formerly, there were a couple of companies who did CATV over multimode because it was analog, and they used very low frequencies and were able to make it work. All of our units are wideband, covering the entire echelon of RF CATV, 45-870Mhz, which encompasses channels 2-135. Our correlating transmitter and receiver sets will only work on singlemode fiber. Especially since CATV in general is digital now, I don't even think you can get transmitters and receivers over MM that work in analog. Please let me know if you have any questions or if you would like a quote on some of our current fiber optic transmitter and receiver sets.

Q: Hello, I have a question about optical/RF power on the F-RF-RX-RM. We recently added the H-4SDI-QAM-IPLL to our system, which allowed us to rearrange some things. The H-4SDI-QAM-IPLL and the H-4HD-EMH are sending IP streams to the H-12SDI-QAM-IPLL, and then the modulated output is sending out all 20 channels to our CATV distribution. The F-RF-1310-TX-4mW takes a feed from the CATV distro and sends it to another building on our campus with an F-RF-RX-RM. We currently get OP 2.6 and -1.6 with the optical pad, and we have an RF level of 89. To get 89, we have an ATT-16 on the receiver and a 20 dB attenuator on the coax going into the transmitter. If we connect the TX and RX together via a fiber jumper, we get signal on our test TV. It also works at the fiber patch leaving the building, but as soon as we get to the building next door, nothing, even though the readings are almost the same. The OP is 1.6 on this side. What are the desirable levels? 1x H-12SDI-QAM-IPLL 1x H-4SDI-QAM-IPLL 1x H-4HD-EMH 1x F-RF-1310-TX-4mW 1x F-RF-RX-RM

The rules are: Our fiber-optic RF CATV Transmitter and Receiver need to be connected with single-mode fiber terminated with SC/APC connectors - this is very important RF input power to the F-RF-1310-TX-4mW needs to be +15 - +25dbmv Optical input power range into Receiver F-RF-RX-RM is +3 - -5dBm Receiver outputs +45dBmv RF power in this optical input +3 - -5dBm range You should have the RF output with OP +1.6 dBm, so something is wrong. Are you using single-mode fiber end to end? Are you interfacing our equipment with SC/APC fiber connectors?

Q: This is the current test setup that I will be working with next week. Can you pass this along to an engineer to see if this setup is ideal?

Yes, this is a good setup, Please just note a few facts: RF Input power should be +15 to +25dbmv The optical inputs into receivers should be 0 to -5dBm It would be very handy to have a CATV RF meter and optical meter; it will save you a lot of setup time because the RF power and optical power need to be met in order to work properly, and it is very hard to determine that without instruments. If you do not have it, we have a very simple RF meter and an optical meter. Also, in your picture you noted SM-APC for the connectors. I think you mean SC/APC.

Q: Do you know if you could safely split the output of the transmitter in this kit to connect to a 1x4 optical splitter F-PLC-1X4, up to 4 receivers in total?

The Optical output from this unit is +2dbm The 1x4 splitter F-PLC-1x4 has 7.4db insertion loss The receivers receiving sensitivity is +3 to -6dbm You should be fine, it is on the border but it will work

Q: I was looking for a good solution to pass an analog signal over multimode fiber. I work on a ship, and the copper run would just be too long to set up a TV from our system. I already have a fiber run in the area, which is about 800 ft of fiber. The TV would be mounted around 40 ft from the receiver at the fiber patch panel. This would be for analog TV video.

Thank you for contacting us. If you are trying to pass along RF CATV, regardless of whether it is analog, you cannot do it on multimode fiber. Multimode is good for short distances with certain signals, like IP or video. However, with RF you can only use it with single mode fiber. That could be why you're having a tough time finding a solution; it's not possible. If you look in our CATV over Fiber products, you will see every single piece of equipment is listed as only being able to work with single mode fiber whether it's HD QAM / ATSC or just SD NTSC Analog. Generally speaking, the only solution here is to pull new fiber.

Q: I am working with a customer who is looking at replacing a large section of a Coaxial CATV system they have in place. Instead of replacing all the old coax and RF line extenders, I would like to look at options for utilizing fibre along the 300 yard - 600 yard runs. Looking at your website this is kind of your cup of tea. Does your company ship to Canada? We are in north-west BC. I would be looking for 1 RF-Fibre converter and then approx. 5 receivers to convert back to CATV for the different buildings on site. Let me know if you are interested in providing me with a solution and I can get you some more information.

Yes, this is one of our specialties. So in this case, if you need a distribution system for 1 Transmitter and 5 Receivers with all relatively short runs, these are the pieces of equipment that you would need. At least an 8mW transmitter with enough power to get through a 1x8 fiber coupler https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html Fiber Splitter 1x8 https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226 For receivers, we offer a variety: rackmount, compact, or compact with higher RF output power https://thorbroadcast.com/product/thor-fiber-optical-mini-ftth-rf-catv-cable-tv-receiver-8230.html https://thorbroadcast.com/product/optical-mini-node-catv-rf-receiver-with-return-path-8230.html All of our CATV over Fiber equipment can be found here if you'd like to browse: https://thorbroadcast.com/products/cable-tv-catv-rf-45-900mhz You need to make sure of two things: 1 - you have single mode fiber 2 - you have SC/APC connectors. If you don't, you need to purchase some jumpers for conversion. We carry all varieties https://thorbroadcast.com/products/fiber-jumpers-cables-attenuators

Compact RF over Fiber transport for analog TV, digital QAM, ATSC, and broadband CATV distribution over single-mode fiber.

The Thor Portable 2mW CATV RF over Fiber Optical Transmitter is a compact and dependable solution designed to transport 45-1000 MHz RF signals over single-mode fiber for short- to medium-distance distribution networks. It is ideal for carrying analog TV channels, digital QAM, ATSC off-air signals, and broadband CATV services from a headend or source location to a remote building, communications room, rack, or optical node.

Built for users who need a small, efficient, and easy-to-deploy RF optical transmitter, this portable unit combines a high-linearity DFB laser with stable internal control electronics to preserve signal quality across the full CATV band. The result is clean RF transport with low distortion, making it well suited for hospitality systems, MATV installations, private coax networks, test benches, temporary broadcast setups, and in-building RF extension projects.

Unlike bulky headend equipment, this mini transmitter is designed for installations where space is limited but performance still matters. It can be used as a point-to-point optical RF link or as part of a larger RF over Fiber architecture that includes rack mount CATV RF receivers, mini nodes with return path, and PLC optical splitters.

Compatible Thor Fiber Optical RF Receivers

The F-RF-TX-MN-2 transmitter can be used with multiple Thor Fiber optical RF receivers, depending on your RF output requirements and system design.

F-RF-RX-MN-2

Thor Fiber Optical Mini FTTH RF CATV Cable TV Receiver with Dual Coax Output

F-RF-RX-RM

CATV RF Fiber Receiver with high RF output, rack-mount design

F-RF-RX-MN

Compact RF CATV mini optical receiver for space-saving installations

F-MININODE-2RP-HP

Optical mini-node CATV RF receiver with return path and high RF output power

Features

Key Features

45-1000 MHz RF bandwidth for analog CATV, digital QAM, ATSC, and broadband RF transport
Compact portable design ideal for headends, telecom rooms, and field deployments
2 mW optical output for short- to medium-distance fiber links (up to ~10 km)
1310 nm wavelength optimized for stable RF over fiber transmission
High-linearity DFB laser ensures low distortion and excellent RF signal quality
Supports analog and digital signals including NTSC, QAM, and ATSC
Ideal for RF extension over fiber when coax distance is limited
Point-to-point RF transport between buildings, racks, or telecom rooms
Works with Thor RF receivers and mini-nodes for full system deployment
Compatible with optical splitters for multi-zone RF distribution
Advanced CPU monitoring for stable laser operation and long lifespan
Low power consumption (< 8W) for efficient operation
Stable optical output for reliable 24/7 performance
Designed for single-mode fiber networks in hotels, hospitals, campuses, and MATV systems
Simple plug-and-play deployment for fast installation
Optimized for SC/APC connectors to minimize reflections and improve performance

Important: This product is an optical transmitter (TX) only.

For a complete working system, it is commonly paired with a matching optical receiver and sold as a TX + RX kit (F-RF-TX/RX-MN).

The full kit enables point-to-point CATV RF transmission over fiber between headend and remote locations.

For best performance, use SC/APC optical connectors. If using SC/ST/FC-PC connectors, a PC to APC jumper is recommended to reduce reflections.

Real System Diagram Using Thor Products

HDMI sources feed a Thor modulator, which converts signals into RF channels. The RF is transmitted over fiber, split across multiple locations, and converted back to coax for TVs or amplifiers.

HDMI Sources

Cameras, STBs,
Media Players

->

QAM / ATSC Modulator

->

RF over Fiber TX

->

Optical Splitter

->

RF Receiver

Drawings

Application Examples

CATV RF QAM over fiber transport over single mode fiber cascading solution

Video

HDMI Modulator and RF over fiber latency demonstration Thor Petit connected to Fiber optic TX and RX

This is a demonstration for showing you how to do HD video Encoding using QAM modulation and transporting it over 10Km of fiber This Specific setup is for applications where HDMI source " ROKU " device is connected to the HDMI RF modulator H-HDMI-RF-PETIT, the CATV RF channel number 2 created by the modulator then output through Coax is then connected to the CATV RF Fiber optic Transmitter, over single-mode fiber optic cable and over to the CATV RF optical receiver, the receiver converts the optical signal to electrical COAX RF signal again. The encoder modulators add a slight delay to the system, the fiber optic Tx and RX ads only 1ms delay.

Model Selection

Available Transmitter Versions

This product page is for the transmitter only (TX). A matching Transmitter + Receiver kit is also available for complete point-to-point CATV RF over fiber transport.

F-RF-TX-MN-2mW – 1310 nm, 2 mW optical output, supports distances up to approximately 10 km over fiber

F-RF-TX-MN-2mW-1550 – 1550 nm, 2 mW optical output, supports distances up to approximately 10 km over fiber

F-RF-TX-MN-10mW – 1310 nm, 10 mW optical output, supports distances up to approximately 40 km over fiber

Important: This listing is for the optical transmitter only.

For customers who need a complete working optical link, this unit is also commonly purchased as a Transmitter + Receiver kit, which allows point-to-point CATV RF transmission over fiber.

The complete kit part number is F-RF-TX/RX-MN, which includes both the optical transmitter and the matching optical receiver.

Other Available CATV RF over Fiber Transmitters

Additional CATV RF fiber optic transmitter models are available for different optical power levels and network sizes. You can browse the full product family here: CATV RF over Fiber Transmitters

F-RF-TX-MN-2mW – Mini CATV RF Fiber Optic Transmitter, 1310 nm, compact design, 2 mW laser
F-RF-1310-TX-4mW – CATV RF Fiber Optic Transmitter, 1310 nm, 45–1000 MHz, 4 mW laser
F-RF-1310-TX-8mW – CATV RF Fiber Optic Transmitter, 1310 nm, 45–1000 MHz, 8 mW laser
F-RF-1310-TX-16mW – CATV RF Fiber Optic Transmitter, 1310 nm, 45–1000 MHz, 16 mW laser
F-RF-1310-TX-32mW – CATV RF Fiber Optic Transmitter, 1310 nm, 45–1000 MHz, 32 mW laser
F-RF-1550-TX-8mW – CATV RF Fiber Optic Transmitter, 1550 nm, 45–1000 MHz, 8 mW laser

TX + RX Kit Option

While this page is for the TX only, many customers purchase the complete F-RF-TX/RX-MN kit, which includes both the transmitter and receiver for a full point-to-point CATV RF over fiber link.

F-RF-TX-MN-2mW

Optical transmitter only

F-RF-RX-MN-2

Matching optical receiver

Complete kit part number: F-RF-TX/RX-MN
Includes: 1 × optical transmitter + 1 × matching optical receiver

Accessories & Upgrades

Recommended Accessory: F-PLC Passive Fiber Optic Splitter

The Thor F-PLC passive fiber optic splitter with SC/APC connectors is an ideal accessory for CATV RF optical transmitters, allowing one optical signal to be split and routed to multiple locations over fiber. Available in 1x2 to 1x64 versions, it is perfect for RF over fiber distribution systems in hotels, campuses, apartment buildings, and other multi-location installations.

Learn more about Thor F-PLC Splitters →

Specification

Item	Unit	Technical specification
Wavelength	nm	1310nm +/- 20
Laser type		DFB laser
Optical modulation type		Direct optical strength modulation
Optical connector type		SC/APC IMPORTANT NOTE* (it is very important to interface our unit with SC/APC - Angle Polished Connector to avoid any light reflections. If your fiber is terminated with the SC, ST, FC /PC flat connector, you need to use an optical jumper from PC type to SC/APC for proper conversion.**
Frequency range	MHz	45-862/1000
RF input level	dBuV	72~82
Flatness in band	dB	+/-0.75
RF input resistance		75
Input reflection loss	dB	>=16
Link C/N	dB	>=51
Link C/CSO	dB	>=60
Link C/CTB	dB	>=65
AGC controlling range	dB	+/-5
MGC controlling	dB	0~10
Power Supply	V	12V DC / 1.5A AC to DC power supply - Included ( F-Type Female coax connector)
Power Loss	W	<= 8
Dimension	mm	140 x 90 x 26

Quick Installation guide

The Mini Transmitter and Mini Receiver set are plug-and-play devices if the RF input power to the TX and optical power input to the RX are in the specified range.

TX RF INPUT 15-25dBmV (75-85dBuV) RX Optical INPUT should be +2 - 6dBm

TRANSMITTER:

1) Connect Power Supply to the Transmitter

2) Connect CATV RF Input to the F port connector - Please note, the RF power should be between 15-25dBmV (75-85dBuV)

3) Connect fiber optic cable to the Mini Transmitter Output - The connector type MUST be SC/APC, never use SC/PC (Blue flat connector) NEVER LOOK DIRECTLY INTO THE UNITS OPTICAL OUTPUT (you could burn your eye)

4 ) For short-distance, point-to-point transmission, please plug 5db fiber optic attenuator, included in the box. (if the transmitter is used with a fiber optic splitter, the attenuator is not needed due to splitters insertion loss). The fiber loss is about 0.35db/km in 1310nm wavelength there is also some slight loss in path panel junctions typically 0.1 -0.5db per junction

5) The TX should show "ON" on the LCD, meaning it is transmitting and outputting an optical signal.

RECEIVER:

1) Connect POWER Supply to the Receiver, "No Light Input" or "Level too Low" the LED will be RED

2) Connect CATV RF cable to the F port connector - RF Output, the output will be about 22dBmV (82 dBuV)

3) Connect fiber optic cable to the Mini Receiver INPUT - The connector type MUST be SC/APC, never use SC/PC (Blue flat connector) NEVER LOOK DIRECTLY TO THE FIBER JUMPER. (You will burn your eye)

4) The optical level by the receiver should be about +2 to -6dBm

5) The LED should turn from RED to GREEN

5a) The RED LED means no Link Light detector

5b) The red light might also mean saturation, LEVEL TOO HIGH, it is easy to determine when you plug in the optical jumper the unit will go from RED to GREEN to RED again, it means the optical level is higher than +2Dbm , the receiver will still work correctly if this level will be not higher than +5dbm, If higher then +5, please add 5db attenuator included with your purchase.

Why Use a 2mW RF over Fiber Transmitter?

A 2mW optical transmitter is often the right choice for portable links, shorter fiber paths, and smaller RF distribution systems. It gives integrators a practical, lower-cost way to move RF channels over fiber without introducing the signal loss and interference problems that are common with long coax runs. For many projects, this means easier installation, better signal stability, and cleaner expansion to remote areas of a campus, hotel, apartment building, stadium zone, or commercial facility.

It is especially useful when paired with a source such as the H-THUNDER-8 HDMI to RF modulator, allowing RF channels generated at the headend to be transported over fiber and then converted back to coax RF near the destination TVs or distribution amplifiers.

Key Features

45-1000 MHz RF bandwidth for CATV and broadband RF transport
2mW optical output for short to medium distance fiber links
Supports analog TV, digital QAM, ATSC, and other RF services
Compact portable housing for field deployment and space-limited installations
High-linearity DFB laser for stable optical performance and low distortion
Automatic internal monitoring and control for reliable operation
Suitable for point-to-point and smaller optical RF distribution systems
Works with Thor RF over Fiber receivers, mini-nodes, and optical splitter networks

Typical Applications

Transporting CATV RF channels from one building to another
Extending QAM or ATSC signals to remote TV zones over fiber
Feeding mini-nodes in hospitality, apartment, campus, or enterprise systems
Reducing long coaxial cable losses in RF distribution systems
Portable RF test systems and temporary event installations
Fiber delivery of modulated channels from a central headend to remote racks

How It Fits Into a Complete RF over Fiber System

In a typical deployment, the RF signal originates from a CATV headend, antenna system, or RF modulator. For example, a Thor H-THUNDER-8 can generate digital QAM or ATSC channels from HDMI sources. Those RF channels feed this portable 2mW optical transmitter, which converts the RF spectrum into an optical signal for transmission over fiber.

At the far end, the optical signal is converted back to coaxial RF by a rack mount CATV RF receiver or a mini-node with return path. The recovered RF can then feed televisions directly, launch into a building coax network, or connect to amplifiers and splitters for wider in-building distribution.

When one optical feed needs to serve multiple destinations, the signal can also be distributed through Thor F-PLC optical splitters, depending on the optical power budget and system design.

Advantages of RF over Fiber vs Long Coax

Much lower signal loss over distance compared with coaxial cable
Better noise immunity in electrically noisy environments
Cleaner delivery of broadband RF channels to remote locations
Easier expansion between buildings and across large properties
Improved system flexibility for centralized headend designs

Technical Overview

Parameter	Specification
Product Type	Portable CATV RF over Fiber Optical Transmitter
RF Frequency Range	45-1000 MHz
Optical Output Power	2mW
Laser Type	High-linearity DFB laser
Supported Signal Types	Analog TV, Digital QAM, ATSC, CATV broadband RF
Fiber Type	Single-mode fiber
Typical Link Distance	Short to medium range deployment, depending on system optical budget
Deployment Style	Portable, compact, point-to-point or small RF over Fiber systems

Recommended Related Products

Thor Broadcast Summary

The portable 2mW CATV RF over Fiber transmitter is an excellent choice for compact RF transport systems where integrators need a simple, reliable, and professional way to move broadband RF over fiber. It is especially effective in systems carrying QAM or ATSC channels from a central source to remote coax distribution points.

Question and Answers

Question:
I have two buildings that are connected with a 1500' 3 pair multimode fiber optic cable. One location has cable TV and the other does not. I currently have one pair of fibers available and wanted to see if I can send the CATV signal through them.

Answer:
Unfortunately, RF CATV can only be transmitted over single-mode fiber. Multimode creates too much dispersion and reflections, and the degradation is so severe and so fast that it is literally impossible to put the cable on multimode. Would it be possible for you to pull a strand of single-mode fiber? If possible, that product you selected would be an ideal fit for your project.

Question:
I have a question about your RF over fiber products. I see that they all say you must use single-mode fiber with SC APC connectors. I was told by a systems integrator that there is a chance it will work on multimode, but it must be OM4 and under 3000 feet. Is this true? If so, what would the expected loss be?

Answer:
The multimode fiber doesn't support CATV RF. The easiest way would be to install the single-mode fiber and use the following devices: Transmitter https://thorbroadcast.com/product/4-mw-catv-rf-over-fiber-tx-45-870-mhz.html Receiver https://thorbroadcast.com/product/catv-rf-fiber-receiver-high-rf-power-rack-8230.html or, if this is impossible, you can use RF to IP and IP to RF gateways. 16 QAM to IP https://thorbroadcast.com/product/16-rf-tuners-to-iptv-ts-qam-output.html IP to 16 QAM Ethernet over Fiber Converters: https://thorbroadcast.com/product/10-100-1000-mbps-fast-and-gigabit-ethernet-over-1-fiber-media-8230.html

Question:
Now we have pulled RJ 6 cable to all the rooms. And also we have pulled OFC cable to all the rooms. The cable TV operator will give RF input to their set-top box, and from the set-top box, we have to take the audio-video signal to the TV. I have 6 rooms now. So please tell me what all things I have to buy from you for watching TV with different programs in different rooms. Please give your suggestions.

Answer:
If you have Single-mode fiber in the rooms, You can use the following units point to multipoint RF over fiber equipment 8mw CATV RF Transmitter: F-RF-TX-8 https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html 1x8 fiber optic slitter ( 1x6 is not available) https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226 6 pcs CATV RF fiber-optic receivers https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html 8mw CATV RF Transmitter: F-RF-TX-8 https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html 1x8 fiber optic slitter ( 1x6 is not available) https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226 6 pcs CATV RF fiber optic receivers https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html

Question:
I need a recommendation to transport 1 freq over fiber about 500 feet. Freq is 111 MHz. - 256 QAM - Kind of what I was thinking, just wanted clarification. Thank you. - Fabulous, thanks

Answer:

So it's RF; what kind of RF?

- https://thorbroadcast.com/product/thor-optical-mini-catv-rf-transmitter-45-1000mhz.html

The receiver can be either of these

https://thorbroadcast.com/product/thor-fiber-optical-mini-ftth-rf-catv-cable-tv-receiver-8230.html

https://thorbroadcast.com/product/rf-catv-mini-optical-receiver.html

- No problem. There are different types of RF; these particular units are specifically for QAM

- It will transport the entire RF CATV range as well.

Question:
Hi, I'm looking to send a cable TV signal over fiber from one building to another.

Answer:

Question:
I would like to replace an obsolete set from Force, Incorporated. It is the CATVLite VSB/AM Video Receiver part # 2801R-MCST (receiver) and its compatible transmitter, the 2801T-MCST for wavelength 1310nm. We are transmitting an analog TV signal over multi-mode fiber. Will this be able to replace that? Thank you.

Answer:
CATV and RF in general have to be sent over Single Mode Fiber. Formerly, there were a couple of companies who did CATV over multimode because it was analog, and they used very low frequencies and were able to make it work. All of our units are wideband, covering the entire echelon of RF CATV, 45-870Mhz, which encompasses channels 2-135. Our correlating transmitter and receiver sets will only work on singlemode fiber. Especially since CATV in general is digital now, I don't even think you can get transmitters and receivers over MM that work in analog. Please let me know if you have any questions or if you would like a quote on some of our current fiber optic transmitter and receiver sets.

Question:
Hello, I have a question about optical/RF power on the F-RF-RX-RM. We recently added the H-4SDI-QAM-IPLL to our system, which allowed us to rearrange some things. The H-4SDI-QAM-IPLL and the H-4HD-EMH are sending IP streams to the H-12SDI-QAM-IPLL, and then the modulated output is sending out all 20 channels to our CATV distribution. The F-RF-1310-TX-4mW takes a feed from the CATV distro and sends it to another building on our campus with an F-RF-RX-RM. We currently get OP 2.6 and -1.6 with the optical pad, and we have an RF level of 89. To get 89, we have an ATT-16 on the receiver and a 20 dB attenuator on the coax going into the transmitter. If we connect the TX and RX together via a fiber jumper, we get signal on our test TV. It also works at the fiber patch leaving the building, but as soon as we get to the building next door, nothing, even though the readings are almost the same. The OP is 1.6 on this side. What are the desirable levels? 1x H-12SDI-QAM-IPLL 1x H-4SDI-QAM-IPLL 1x H-4HD-EMH 1x F-RF-1310-TX-4mW 1x F-RF-RX-RM

Answer:

The rules are: Our fiber-optic RF CATV Transmitter and Receiver need to be connected with single-mode fiber terminated with SC/APC connectors - this is very important RF input power to the F-RF-1310-TX-4mW needs to be +15 - +25dbmv Optical input power range into Receiver F-RF-RX-RM is +3 - -5dBm Receiver outputs +45dBmv RF power in this optical input +3 - -5dBm range You should have the RF output with OP +1.6 dBm, so something is wrong. Are you using single-mode fiber end to end? Are you interfacing our equipment with SC/APC fiber connectors?

Question:
This is the current test setup that I will be working with next week. Can you pass this along to an engineer to see if this setup is ideal?

Answer:
Yes, this is a good setup, Please just note a few facts: RF Input power should be +15 to +25dbmv The optical inputs into receivers should be 0 to -5dBm It would be very handy to have a CATV RF meter and optical meter; it will save you a lot of setup time because the RF power and optical power need to be met in order to work properly, and it is very hard to determine that without instruments. If you do not have it, we have a very simple RF meter and an optical meter. Also, in your picture you noted SM-APC for the connectors. I think you mean SC/APC.

Question:
Do you know if you could safely split the output of the transmitter in this kit to connect to a 1x4 optical splitter F-PLC-1X4, up to 4 receivers in total?

Answer:
The Optical output from this unit is +2dbm The 1x4 splitter F-PLC-1x4 has 7.4db insertion loss The receivers receiving sensitivity is +3 to -6dbm You should be fine, it is on the border but it will work

Question:
I was looking for a good solution to pass an analog signal over multimode fiber. I work on a ship, and the copper run would just be too long to set up a TV from our system. I already have a fiber run in the area, which is about 800 ft of fiber. The TV would be mounted around 40 ft from the receiver at the fiber patch panel. This would be for analog TV video.

Answer:
Thank you for contacting us. If you are trying to pass along RF CATV, regardless of whether it is analog, you cannot do it on multimode fiber. Multimode is good for short distances with certain signals, like IP or video. However, with RF you can only use it with single mode fiber. That could be why you're having a tough time finding a solution; it's not possible. If you look in our CATV over Fiber products, you will see every single piece of equipment is listed as only being able to work with single mode fiber whether it's HD QAM / ATSC or just SD NTSC Analog. Generally speaking, the only solution here is to pull new fiber.

Question:
I am working with a customer who is looking at replacing a large section of a Coaxial CATV system they have in place. Instead of replacing all the old coax and RF line extenders, I would like to look at options for utilizing fibre along the 300 yard - 600 yard runs. Looking at your website this is kind of your cup of tea. Does your company ship to Canada? We are in north-west BC. I would be looking for 1 RF-Fibre converter and then approx. 5 receivers to convert back to CATV for the different buildings on site. Let me know if you are interested in providing me with a solution and I can get you some more information.

Answer:
Yes, this is one of our specialties. So in this case, if you need a distribution system for 1 Transmitter and 5 Receivers with all relatively short runs, these are the pieces of equipment that you would need. At least an 8mW transmitter with enough power to get through a 1x8 fiber coupler https://thorbroadcast.com/product/8-mw-catv-rf-over-fiber-tx-45-870-mhz.html Fiber Splitter 1x8 https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226 For receivers, we offer a variety: rackmount, compact, or compact with higher RF output power https://thorbroadcast.com/product/thor-fiber-optical-mini-ftth-rf-catv-cable-tv-receiver-8230.html https://thorbroadcast.com/product/optical-mini-node-catv-rf-receiver-with-return-path-8230.html All of our CATV over Fiber equipment can be found here if you'd like to browse: https://thorbroadcast.com/products/cable-tv-catv-rf-45-900mhz You need to make sure of two things: 1 - you have single mode fiber 2 - you have SC/APC connectors. If you don't, you need to purchase some jumpers for conversion. We carry all varieties https://thorbroadcast.com/products/fiber-jumpers-cables-attenuators

Question:
I am installing a fiber run for a few Comcast cable boxes at a job site. We purchased a CATV RF Fiber Transmitter, Model No. F-RF-TX-MN-2MW. We also purchased a CATV RF Optical Receiver, Model No. F-RF-RX-MN-2. I am testing offsite before the install with a Cox box because they are in a similar frequency range. I'm testing with a short 3 meter cable, but can't get the Cox box to load its content. Since I'm using a short cable, is it possible that I need a signal attenuator?

Answer:

Are you trying to get it to work with a Cable TV Set-Top Box (STB)? There might be a couple of things to check:

Please measure the RF input power. It needs to be between 15-30 dBmV.
Additionally, many cable companies use a return path (5-45 MHz) in the reverse direction for communication and registering the box with the cable TV headend.

Please perform the following test:

Connect the STB directly to the coax cable (bypassing the optical equipment) and check if you receive content.
Without removing power from the STB, connect it through the Optical TX and RX units.
If it works in this setup, it means your system requires bi-directional RF:
- Forward path: 45-1000 MHz
- Return path: 5-45 MHz

If that's the case, you will need this unit:

F-RFoF-TX/RX

https://thorbroadcast.com/product/coax-cable-bi-directional-catv-rf-transmitter-and-receiver-over-fiber-8230.html

Question:
Apologies for our ignorance, as we're just trying to solve a problem for a customer, but we don't normally support this area. The full story: A customer's coaxial line from the distribution comm closet to their specific apartment was cut, and we're unable to run a new line. This coaxial line provides their apartment with the Xfinity RF DOCSIS for internet, and we're trying to find some way to reconnect them. There is a single SC fiber run still connected and a single Cat 5e. Xfinity has denied any responsibility for the line inside the building after distribution. Are there any solutions for this on a single SC fiber run or Cat 5e?

Answer:

That makes sense - we do have a solution for this:

F-RFoF-TX/RX - (TX + RX kit / both ends) https://thorbroadcast.com/product/coax-cable-bi-directional-catv-rf-transmitter-and-receiver-over-fiber-8230.html

Please note: two single-mode fiber strands are required. The fiber optic interface is SC/APC (green, angled polish). If you do not have SC/APC fiber, please use SC/PC to SC/APC conversion patch cables.

Also, an RF spectrum analyzer will be very helpful during installation, since the optical transceivers require an RF input level of +15 to +25 dBmV. In many cases, the modem output level needs to be adjusted to meet this RF window (either internally or externally using passive attenuators).

Please let me know if this is clear.

Question:
How do you calculate the Optical Budget and Transmission Distance?

Answer:

The transmission distance depends on the transmitter optical output power and the operating input range of the optical receiver. For this unit, the transmitter optical output is approximately +2 dBm. If the receiver sensitivity is approximately -5 dBm, the total optical budget is about 7 dB.

This means the total allowable loss in the optical link - including fiber attenuation, patch panels, connectors, and any passive optical components - should remain within that 7 dB budget.

As a general reference, single-mode fiber at 1310 nm has a typical loss of about 0.35 dB/km. Additional losses must also be considered for optical connectors, patch points, and splice or panel transitions.