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  2. Cable TV CATV RF 45-900Mhz
  3. 4 mW CATV RF Over Fiber Tx 45-870 MHz
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4 mW CATV RF Over Fiber Tx 45-870 MHz

Model: F-RF-1310-TX-4mW
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Availability: In stock Condition: new QR Code 4 mW CATV RF Over Fiber Tx 45-870 MHz
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Description

RF Over Fiber Optical Transmitter – 1310nm | 4mW | 45–1000 MHz

The RF Over Fiber Optical Transmitter (4mW, 1310nm) is a high-performance solution designed to transport any RF signal over single-mode fiber with exceptional signal integrity and reliability. Supporting a wide frequency range of 45–1000 MHz, this unit enables seamless distribution of both analog and digital RF signals over long distances.

This transmitter directly converts incoming RF signals into optical signals, allowing all channels and services to be transported over a single fiber link. It is fully compatible with industry-standard RF over Glass (RFoG) systems and can operate with Thor Fiber receivers as well as third-party RF optical receivers.


Universal RF Compatibility

This system supports virtually all RF modulation formats within the 45–1000 MHz range, including:

  • Analog TV (NTSC / PAL / SECAM)
  • Digital QAM (DVB-C, J.83 Annex B)
  • ATSC (8VSB)
  • QPSK (satellite IF downconverted to L-band within range)
  • FM radio and other RF-based services

Real System Diagram Using Thor Products

Example signal flow: HDMI sources enter a Thor modulator, the RF output feeds an RF optical transmitter, the fiber is split using PLC splitters, and multiple optical RF receivers convert the signal back to coax for TVs or local RF amplifiers.

HDMI Sources
Cameras, Set-Top Boxes,
Media Players, PCs
→
H-THUNDER-8 QAM / ATSC Modulator
Thor H-THUNDER HDMI to QAM ATSC RF Modulator
Creates RF channels from HDMI sources
→
RF over Fiber Transmitter
Thor RF over Fiber CATV transmitter
8mW / 16mW / 32mW options
→
F-PLC Optical Splitter
Thor PLC optical splitter
1x8 / 1x16 / 1x32 / 1x64
→
F-RF-RX-RM Receivers
Thor rack mount CATV RF optical receiver
Optical to coax RF conversion
 

Transmitter can be used with any or Thor Fiber optical RF receivers

  F-RF-RX-RM     

CATV RF Rack- Mountable Receiver High Power  

 

  F-RF-RX-MN     

CATV RF Mini optical receiver

 

F-Mininode

CATV Mininode -RF Receiver and return path RF transmitter

Features

Key Features

  • Wide RF Frequency Range: 45–1000 MHz
  • Optical Output: 1310nm DFB laser, 4mW power
  • Transport Type: RF over Fiber (RFoG compatible)
  • Full Spectrum Transport: Carries all RF channels simultaneously over one fiber
  • High Linearity: Ensures low distortion for digital and analog signals
  • Automatic Gain Control (AGC): Maintains consistent RF performance
  • Point-to-Point & Point-to-Multipoint:
    • Direct fiber link
    • Passive Optical Network (PON) using PLC splitters (1x2, 1x4, 1x8, etc.)
  • Front Panel LCD Display: Real-time monitoring, alarms, and status
  • Redundant Power Supply (Optional): Increased system reliability

Typical Applications

1. CATV & Hospitality TV Distribution

Deliver dozens or hundreds of TV channels from a central headend to multiple buildings or rooms using fiber instead of coax.

2. Multi-Building RF Distribution

Transport RF signals between buildings, campuses, or facilities without signal degradation over long distances.

3. RF Over Fiber Backbone Replacement

Replace long coaxial cable runs with fiber to eliminate signal loss, noise, and grounding issues.

4. Stadiums & Large Venues

Distribute RF signals across large areas such as stadiums, racetracks, and event venues using fiber infrastructure.

5. IPTV + RF Hybrid Systems

Use QAM or ATSC modulators (such as Thor Broadcast modulators) to generate RF channels, then distribute them over fiber.

6. Fiber-to-the-Home (FTTH) / RFoG Systems

Deploy RF overlay services alongside data networks using passive optical splitters.

7. Broadcast & Headend Signal Transport

Transport RF feeds between headend equipment rooms, remote transmitter sites, or monitoring locations.


System Architecture Options

Point-to-Point

  • Transmitter → Single Fiber → Optical RF Receiver
  • Ideal for direct long-distance links

Point-to-Multipoint (PON Architecture)

  • Transmitter → Fiber → PLC Splitter → Multiple Receivers
  • Efficient distribution to many locations using passive components

Compatibility

The transmitter works seamlessly with:

  • Thor Fiber RF Optical Receivers
  • Industry-standard RFoG optical nodes and receivers
  • Passive optical components (PLC splitters, couplers)

Why Use RF Over Fiber?

  • Low Signal Loss over Distance (compared to coax)
  • Immunity to EMI/RFI interference
  • Supports large channel counts
  • Scalable architecture using optical splitters
  • Cleaner signal for digital modulation (QAM / ATSC)

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.

Drawings




Model Selection

The following CATV RF fiber optic transmitters are available. You can view all models 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

Other available models: 8 mW, 16 mW, and 32 mW versions in both 1310 nm and 1550 nm wavelengths.

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

*All Specifiactions Subject to Change Without Notice
  • Input

1x Type-F connector - 75 Ohm

  • Optical Wavelength
1310nm
  • Line Width:
< 1 MHz   FWHM
  • Extinction Ratio
>20 dB XP
  • Equivalent Noise Intensity
< -160 dB/Hz
  • Output Power
4 mW  (+6dBm)
  • Return Loss
>55 dB
  • Optical Connector

SC/APC - Angle Polished

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. 

  • RF Power Level
11-29 dBmV AGC Managed
  • Flatness
<± 0.75    45 - 862 MHz
  • SBC Restrain
>17 dBm
  • CNR
>50 dB @ 10km fiber length
  • CTB
< -63 dB
  • CSO
< -57 dB
  • Dimensions
19 x 10 x 1.75 inch
  • Weight
2.5 kg
  • Operating Temperature
0 - 45 

Question and Answers

Answer:
Yes, for 12TV's and 200 feet of single mode fiber, 4mW OTx and the mini receiver are sufficient. It has to be single mode fiber with SC/APC termination. We've been helping customers with these kind of applications for a long time, it's our niche. This would be an ideal solution for what you're trying to accomplish. As we noted previously we have everything in stock, if you'd like to move forward with a purchase please let us know. We can accept a credit card or PO.

Answer:
The only reliable way is to use optical SC/APC attenuators, there are some "temporary test methods " 1 connect an optical fiber to the meter and Bend the fiber slightly gently; but not too much of an acute angle to avoid damaging it. 2 Remove the fiber jumper slightly from the adaptor to create an air gap, you can monitor the loss using the Optical Meter

Answer:
Thank you for reaching out to Thor Fiber.

To send CATV  RF from one location to 5 remote locations, please use the following equipment:

  • F-RF-1310-TX-16MW: 16 MW CATV RF transmitter - $2995 -  https://thorbroadcast.com/product/16-mw-catv-rf-over-fiber-tx-45-870-mhz.html
  • F-PLC-1x8: 1x8 optical splitter - $495 (no 5-port available)  https://thorbroadcast.com/product/1-x-2-to-1-x-128-fiber-optic-couplers.html/226
  • F-RF-RX-RM: Optical to RF high-power receiver - $1595 each - https://thorbroadcast.com/product/catv-rf-fiber-receiver-high-rf-power-rack-8230.html
    • High dual power output: 45 dBmV each, eliminates the need for RF amplifiers.
    The signal flow diagram
  • Central Location      |      |  (RF Signal)      |  F-RF-1310-TX-16MW      |      |  (RF Signal)      |  F-PLC-1x8 Optical Splitter      |      |---- Single-Mode Fiber ----|      |                           |                                |                           |                                |                           |                                V                           V                           Building 1                   Building 2      ...        Building 5      |                           |                           |      |  (Fiber to RF Conversion) |                           |      |                           |                           |  F-RF-RX-RM                 F-RF-RX-RM                   F-RF-RX-RM      |                           |                           |      |  (RF Signal 45 dBmV)      |                           |      |                           |                           |    Output                     Output                      Output
   

 

Please note that this equipment requires single-mode fiber only (not multimode) and must be interfaced with an SC/APC (angle polished connector).

One more thing: if you have SC/PC connectors on your patch panel, you will need to use conversion cables (jumpers) — SC/APC (for our devices, green) to SC/PC (flat, blue) to connect to your patch panels.

https://thorbroadcast.com/product/sc-pc-to-sc-apc-simplex-3-0mm-singlemode-patch-cable.html

Answer:
We do have portable RF TX/RX or rack-mountable, which one would you prefer: Portable  Mini TX/RX: https://thorbroadcast.com/product/thor-optical-mini-catv-rf-transmitter-45-1000mhz.html https://thorbroadcast.com/product/thor-fiber-optical-mini-ftth-rf-catv-cable-tv-receiver-8230.html 19" rack-mountable https://thorbroadcast.com/product/4-mw-catv-rf-over-fiber-tx-45-870-mhz.html https://thorbroadcast.com/product/catv-rf-fiber-receiver-high-rf-power-rack-8230.html   The devices require single-mode fiber, the interface is SC/PC, so you would need 2 optical jumpers LC/PC to SC/APC

Answer:
Okay we certainly have the gear available that you need, but to narrow it down I just have a couple basic questions.    What is the distance of your single mode fiber? Do you already have SC/APC terminations on the singlemode?    Do you need bidirectional or is this application just going unidirectionally?   If this is uni- directional transmission ( Cable TV video only) you can use those TX/RX units , 1 single mode fiber is required SC/APC fiber connects F-RF-TX-MN-2mW https://thorbroadcast.com/product/thor-optical-mini-catv-rf-transmitter-45-1000mhz.html F-RF-RX-MN-2 https://thorbroadcast.com/product/thor-fiber-optical-mini-ftth-rf-catv-cable-tv-receiver-8230.html     If this is Bi-directional ( Cable TV + Internet) You can use this unit, 2 single mode fibers are required, SC/APC fiber connects F-RFoF-TX/RX https://thorbroadcast.com/product/coax-cable-bi-directional-catv-rf-transmitter-and-receiver-over-fiber-8230.html    

Answer:

Yes, absolutely! We have great engineers and the capability to help you design and advise on the right equipment. Please check the application drawing below to see what we did for one of our customers

Answer:

I checked the MUL-1310TX-1000 model number. It looks like it should include one more digit at the end (4, 8, 10, 12, or 16). This is an RF optical transmitter, and we can match an equivalent model from our Thor transmitters.

We also offer a complete fiber break system, PN :  F-RF-BR  which includes the transmitter (TX), receiver (RX), and an optical jumper. In this setup, it’s simply RF IN → fiber → RF OUT.

 

https://thorbroadcast.com/product/rf-fiber-break-optical-rf-coax-isolation-solution.html

 

 

If you already have a working RX, we can just replace the failed TX. Alternatively, we can use a full replacement solution for this application.-  PN F-RF-BR

Documents

F-RF-1310-TX - USER MANUAL
F-RF-1310-TX-4mW - TECHNICAL DATASHEET
F-RF-1310-TX - QUICK SETUP GUIDE
thor-f-rf-broadband-catv-fiber-optic-distribusion-solusion-.pdf

4 mW CATV RF Over Fiber Tx 45-870 MHz

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    • HD-SDI converters
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