3G-SDI over Fiber Extender | HD/SDI Video Fiber Converter 1080p60

Q: I am looking for the cost of the F-M1SDI-3G-TX/RX Kit using multimode fiber. I currently have the single-mode model and it works great, but I have 12 strands of multimode fiber that I want to use for my shorter distances.

The F-M1SDI-3G-TX/RX Kit uses single-mode lasers because strictly multimode equipment is being phased out of the optical transport industry. However, this solution can work for shorter distances over multimode fiber. While we cannot guarantee performance in this specific configuration, the best approach would be to test the units for your particular situation. We offer a 30-day return policy, so if it does not work for your setup, you can return it. We currently have these in stock, and you can purchase them directly from our website. Once ordered, we will ship them out so you can test the connection.

Q: As I discussed last week with Cameron and Mark, I'm looking for a much smaller version of our EDFA amplifier (https://thorbroadcast.com/product/20-dbm-edfa-optical-amplifier.html) for use in tactical deployments. I found this item, but our Government client now requires products made in the USA. Here is a description of our application: we are currently sending an A/V feed from our MaximusH265Pro box camera over the air at a distance of 200 m using our transmit/receive beam shaping optical front end. I'm using a F-M1SDI-3G-TX to transmit and F-M1SDI-3G-RX to receive. Our link margin should get us to 300 m without an EDFA, but we would really like to go out to 500 m or greater. I would also like to see what's possible in terms of increasing the aperture at the receiver end. I have increased the "ease in coupling" of our optical front end to the F-M1SDI-3G-RX on the receive end using multimode fiber. This allows me to get our link up and running quickly without noticeable impact on link margin via simple mechanical alignment (tripod), so I was wondering if the alignment process can be further improved with a wider receiver aperture.

That won't be an issue. If you have the M1sdi-3G units, the transmit and receive pair, you can check the specs and see that on multimode fiber they work for about 2000 ft; but over singlemode fiber the standard units go about 20 km. In none of the situations you mention above are you coming even remotely close to 20 km, so the standard stock units should be more than capable of handling your current environment. Unfortunately, the distance limitation is not inherently within our unit, but with the choice of fiber you are using. Regardless of how strong we make the optics in the transmitter, the distance limitation residing within the multimode fiber core is the problem area that degrades your signal transmission. EDFA will not help if you are using multimode fiber. The right solution would be to use single mode fiber instead of multimode. Then, you will not even need EDFA for 500 meters. Please let me know if this is clear.

Q: I am just trying to get my head around how it is possible to send SDI data in one direction and 485 data in the other direction with this small F-micro. I thought it would require another laser, but I know it works, so I should just stop overthinking it.

The way we do it is by using two different wavelengths (colors of light). The TX sends SDI to the RX on the 1310nm wavelength, and the RX sends RS485 data back on 1550nm. Both units have small optical filters that separate the 1310nm and 1550nm wavelengths. I hope this explains it. If not, here is a more detailed explanation of how WDM optical muxing and demuxing works Principle: WDM is like sending multiple colored lights through the same fiber optic cable. Each color (wavelength) carries a different signal, so you can send several signals at the same time without them interfering with each other. Explanation: Imagine you have a flashlight that can shine in different colors-red, green, blue, etc. If you shine all these colors down the same path, they won't mix together; they'll stay separate. In WDM, each color of light represents a different data signal (like video or internet). Muxing: At the start, a device called a multiplexer (mux) combines the different colors (wavelengths) into one single beam of light that travels through the fiber optic cable. Demuxing: At the other end, a demultiplexer (demux) splits the beam back into its original colors (wavelengths), separating the data signals. In WDM, the fiber optic cable carries all these different "colored" signals at once, allowing more data to be transmitted efficiently.

Q: I'm interested in transmitting 8 HD-SDI feeds over fiber, and I'd like to compare the pricing between the 1.5G and 3G models.

The HD-SDI model uses TDM, so it's slightly less expensive. https://thorbroadcast.com/product/8-sdi-hdsdi-over-1-fiber-optical-transmission-multiplexer.html The 3G models are CWDM. https://thorbroadcast.com/product/8-ch-sd-hd-3g-sdi-over-single-fiber-cwdm-uncompressed-rack-mountable.html We also have those with a loop out. https://thorbroadcast.com/product/8-ch-sd-hd-3g-sdi-over-single-fiber-with-loop-outputs.html We also just expanded our line of those models, so they can do up to 16 inputs on 3G. https://thorbroadcast.com/product/16-channel-sd-hd-3g-sdi-4k-uhd-over-one-fiber-8230.html We're still running a special on these. If you'd like to discuss further, I'm readily available; PST until about 3:30 PM today. 1800-521-8467 ext. 1 If you have any questions about the differences between the products or their capabilities, let me know.

Description

3G SDI over fiber, 3G SDI fiber extender with RS485 control for data

Optical Transmitter/Receiver Kit -

PN# F-M1SDI-3G-TX/RX
Extend 3G, HD-SDI, or SD-SDI digital video signals over single-mode fiber optic cable
Base Model F-M1SDI-3G-TX / RX supports single-mode fiber up to 20Km and has an ST / PC connector

Thor Fiber ultra-compact 3G SDI fiber extender kits are designed to increase the range of digital 3G, SD-SDI, or HD-SDI video signals over single-mode fiber optic cable. SDI is normally carried over coaxial cable on BNC connectors; however, the maximum cable distance is limited to around 100 meters. Thor SDI extenders increase the distance to more than 80 miles by using lasers to send data over the fiber optic cable.

F-M1SDI-3G-TX/RX kit with ST/PC fiber connector, supports single-mode fiber up to 20Km

Up to 3G SDI optical fiber converters.

It allows the transport of SDI, HD-SDI, and 3G SDI over distances up to 20km using single-mode fiber optic cable with ST/PC standard.

Tags: SDI over Fiber SDI to COAX

Features

Supports SMPTE-424m (3G-SDI), SMPTE-292M (HD-SDI), SMPTE-259M (SDI), and DVB-ASI specifications
Telecast Rattler comparable
Transports multi-rate HD-SDI digital video over 1 single-mode fiber
Latch-locking power connector
HD-SDI BNC input connector
Robust metal die-cast enclosure for harsher environments
Automatic input equalization
Input Impedance: 75 Ohm
Data Rate: up to 3 Gbps
Signal Level: 800mVp-p +/- 50mV
Optical Fiber Types: ST/PC (Single mode)
Number of Fibers: 1
Output Connector: BNC Female
Distance: Up to 15 miles (20km) using single-mode fiber
Propagation Delay (Sender): 1.3 ns
Propagation Delay (Receiver): 35 ns
Power Supply: 5V DC @ 0.5 A
Power Budget: 13dB
Operating Temperature: -20 to +80C
Wavelength (Sender Unit): 1310nm
Wavelength (Receiver Unit): 1310 nm - 1670 nm

Applications

Broadcast studios and TV production
Live event video transmission
Sports venues and stadiums
Video production and post-production
Medical imaging systems
Military and defense video systems
Industrial video monitoring
Surveillance and security systems
Campus and facility-wide video distribution

Drawings

Application Examples

3G SDI over Fiber

Model Selection

Model	Description

F-M1SDI-3G-TX/RX	Optical connector: ST/PC – 20 km Standard Model

F-M1SDI-3G-TX/RX-40	Optical connector: ST/PC – 40 km Extended Distance Model ( additional costs will apply)

F-M1SDI-3G-TX/RX-60	Optical connector: ST/PC – 60 km Extended Distance Model ( additional costs will apply)

F-M1SDI-3G-TX/RX-80	Optical connector: ST/PC – 80 km Extended Distance Model additional costs will apply)

F-M1SDI-3G-TX/RX-120	Optical connector: ST/PC – 120 km Long-Distance Model ( additional costs will apply)

Accessories & Upgrades

Specification

Size / Weight	WEIGHT: 1.3 lb BOX SIZE (IN): 9.75 x 6.25 x 2.75 in BOX SIZE (MM): 248 x 159 x 70 mm UNIT SIZE (IN): 4.25 x 2 x 1.25 in UNIT SIZE (MM): 108 x 51 x 32 mm
* All Specifications Subject to Change Without Notice
HD-SDI Input	HD-SDI, SD-SDI, or DVB-ASI 0 - 3 Gbps Serial Digital Signal Input Signal Standard: SMPTE292M, SMPTE259M, SMPTE297M, SMPTE310, SMPTE 424m, SMPTE 372m, SMPTE305 (SDTI), DVB-ASI (EN50083-9), Media Audio
Number of Inputs	1 SDI - (BNC) 1 RS-485 (terminal block)
Signal Level	> 800mVp-p
Impedance	75 Ohm
Connector	BNC
Distance	20 km Standard Model -- optical distance can be increased to 30/60/80/100 km (additional costs will apply)
Power Supply	130 - 260 VAC @ 50-60 Hz
Power Consumption	<10W
Temperature	0 to +70 Degrees
Humidity	0 to 95%
Connector	ST / PC
Optical Channels	1310 or (1550nm and CWDM available)
LED Status Indicator Power	Power / Link LED

Supported Standards:

	SMPTE format	Bitrates	Video formats
SMPTE 259M	SD-SDI	270 Mbit / s, 360 Mbit / s, 143 Mbit / s and 177 Mbit / s	480i, 576i
SMPTE 344M	ED-SDI	540 Mbit / s	480p, 576p
SMPTE 292M	HD-SDI	1,485 Gbit / s and 1,485 / 1,001 Gbit / s	720p, 1080i
SMPTE 372m	Dual Link HD-SDI	2.970 Gbit / s and 2.970 / 1.001 Gbit / s	1080p60
SMPTE 424m	3G-SDI	2.970 Gbit / s and 2.970 / 1.001 Gbit / s	1080p60

Question and Answers

Question:
I am looking for the cost of the F-M1SDI-3G-TX/RX Kit using multimode fiber. I currently have the single-mode model and it works great, but I have 12 strands of multimode fiber that I want to use for my shorter distances.

Answer:
The F-M1SDI-3G-TX/RX Kit uses single-mode lasers because strictly multimode equipment is being phased out of the optical transport industry. However, this solution can work for shorter distances over multimode fiber. While we cannot guarantee performance in this specific configuration, the best approach would be to test the units for your particular situation. We offer a 30-day return policy, so if it does not work for your setup, you can return it. We currently have these in stock, and you can purchase them directly from our website. Once ordered, we will ship them out so you can test the connection.

Question:
As I discussed last week with Cameron and Mark, I'm looking for a much smaller version of our EDFA amplifier (https://thorbroadcast.com/product/20-dbm-edfa-optical-amplifier.html) for use in tactical deployments. I found this item, but our Government client now requires products made in the USA. Here is a description of our application: we are currently sending an A/V feed from our MaximusH265Pro box camera over the air at a distance of 200 m using our transmit/receive beam shaping optical front end. I'm using a F-M1SDI-3G-TX to transmit and F-M1SDI-3G-RX to receive. Our link margin should get us to 300 m without an EDFA, but we would really like to go out to 500 m or greater. I would also like to see what's possible in terms of increasing the aperture at the receiver end. I have increased the "ease in coupling" of our optical front end to the F-M1SDI-3G-RX on the receive end using multimode fiber. This allows me to get our link up and running quickly without noticeable impact on link margin via simple mechanical alignment (tripod), so I was wondering if the alignment process can be further improved with a wider receiver aperture.

Answer:
That won't be an issue. If you have the M1sdi-3G units, the transmit and receive pair, you can check the specs and see that on multimode fiber they work for about 2000 ft; but over singlemode fiber the standard units go about 20 km. In none of the situations you mention above are you coming even remotely close to 20 km, so the standard stock units should be more than capable of handling your current environment. Unfortunately, the distance limitation is not inherently within our unit, but with the choice of fiber you are using. Regardless of how strong we make the optics in the transmitter, the distance limitation residing within the multimode fiber core is the problem area that degrades your signal transmission. EDFA will not help if you are using multimode fiber.

The right solution would be to use single mode fiber instead of multimode. Then, you will not even need EDFA for 500 meters. Please let me know if this is clear.

Question:
I am just trying to get my head around how it is possible to send SDI data in one direction and 485 data in the other direction with this small F-micro. I thought it would require another laser, but I know it works, so I should just stop overthinking it.

Answer:
The way we do it is by using two different wavelengths (colors of light). The TX sends SDI to the RX on the 1310nm wavelength, and the RX sends RS485 data back on 1550nm. Both units have small optical filters that separate the 1310nm and 1550nm wavelengths. I hope this explains it. If not, here is a more detailed explanation of how WDM optical muxing and demuxing works

Principle: WDM is like sending multiple colored lights through the same fiber optic cable. Each color (wavelength) carries a different signal, so you can send several signals at the same time without them interfering with each other.

Explanation: Imagine you have a flashlight that can shine in different colors-red, green, blue, etc. If you shine all these colors down the same path, they won't mix together; they'll stay separate. In WDM, each color of light represents a different data signal (like video or internet).

Muxing: At the start, a device called a multiplexer (mux) combines the different colors (wavelengths) into one single beam of light that travels through the fiber optic cable.
Demuxing: At the other end, a demultiplexer (demux) splits the beam back into its original colors (wavelengths), separating the data signals.

In WDM, the fiber optic cable carries all these different "colored" signals at once, allowing more data to be transmitted efficiently.

Question:
I'm interested in transmitting 8 HD-SDI feeds over fiber, and I'd like to compare the pricing between the 1.5G and 3G models.

Answer:
The HD-SDI model uses TDM, so it's slightly less expensive. https://thorbroadcast.com/product/8-sdi-hdsdi-over-1-fiber-optical-transmission-multiplexer.html The 3G models are CWDM. https://thorbroadcast.com/product/8-ch-sd-hd-3g-sdi-over-single-fiber-cwdm-uncompressed-rack-mountable.html We also have those with a loop out. https://thorbroadcast.com/product/8-ch-sd-hd-3g-sdi-over-single-fiber-with-loop-outputs.html

We also just expanded our line of those models, so they can do up to 16 inputs on 3G. https://thorbroadcast.com/product/16-channel-sd-hd-3g-sdi-4k-uhd-over-one-fiber-8230.html We're still running a special on these. If you'd like to discuss further, I'm readily available; PST until about 3:30 PM today. 1800-521-8467 ext. 1 If you have any questions about the differences between the products or their capabilities, let me know.

Documents

F-M1SDI-3G-TxRx User Manual

thor-fiber-f-msdi-3g-tx-rx-quick-installation-guide..pdf

thor-fiber-f-msdi-3g-tx-rx-quick-installation-guide-2023.pdf

1-8-hd-sdi-over-fiber-extenders-selection-and-optional-aux.pdf

Availability:	In stock	Condition:	new
Shipping:	starting at $0.00	Warranty:	1Yrs

1 Channel 3G-SDI over Fiber Extender - HD/SDI Video Transmission up to 1080p60