4 SDI / HDSDI Over 1 Fiber MINI Extender

Description Features Drawings Model Selection Specification Documents

4 Ch Mini HD-SDI Fiber Optic Extender

Extend four HD-SDI or SD-SDI digital video signals long distances over single-mode fiber optic cable

The Thor Fiber F-M4SDI-TxRx kit is a compact power house that will allow any user to transport four channels of 1.485Gbps HD-SDI Serial Data Interface over a single strand of fiber. Furthermore this Thor Fiber Kit of Transmitter and Receiver will send RS485 in reverse for easy control over the kit. This sturdy unit creates an easy drop environment for users that require multiple HD-SDI sources on one Fiber across any application and even allows additional AUX Cards which can allow a plethora of other options such as RS232 and RS422, and even capable of carrying external analog audio instead of the SDI embedded audio. Thor Fiber has an excellent reputation for high quality and low cost products to help complete your project on time, in a loss free high quality kit that will ensure you stay under budget. Commonly used in security applications, live performance environments, video surveillance, SDI distribution and control in any environment.

Locking Cables
ST or FC or SC fiber & BNC connectors make sure that the cable is not accidentally pulled out of the equipment 

No Link Alarms

Link status alarm on both the transmitter and receiver indicate when the link is not functional.
Serial Data
RS-485 return path sends serial data from the receiver back to the transmitter for device control.
  • Supports 4 Full HD-SDI @ 1.5Gbps or lower SDI or ASI digital video
  • Transports embedded audio channels as well as SDI ancillary data
  • Return path serial RS-485 channel for controlling equipment on Tx end
  • Link alarm indicators on both Tx & Rx indicate a problem with the fiber

Multipoints (Tranmitters ) to Point ( chassies and receivers blades) Aplication drawing :



The F-M4SDI fiber transport kit for HD-SDI, SD-SDI, or DVB-ASI comes with many standard features useful for video professionals  An optical link alarm (NOS) illuminates on both ends when a link cannot be established over the fiber. This immediately alerts operators on either the transmitter or receiver end of the link that there is a problem with the fiber.



 This system provides four fully independent SDI links over a single fiber cable at up to 1.5 Gbps each.  In addition the Aux port can be configured to provide bi-directional stereo audio, dual RS-232/422 duplex connections, or up to 4 contact closure lines; all over a single strand of fiber.  Optical power outputs are available for transport distances from 10 - 80 km.

4 hd-sdi to fiber

Model Selection
Addition Available Cards :
(External Analog Audio, 10/100 Ethernet, Gigabit Ethernet, RS422, RS232) (add $)
  • 2 forward contact closure + Embedded audio
  • 2 backward contact closure + Embedded audio
  • 1 bidirectional RS422+Embedded audio
  • 2 bidirectional RS232+Embedded audio
  • 2 external bidirectional audio
  • 4 external forward audio
  • 4 external backward audio - Embedded audio   
  • 10/100 Ethernet (full-duplex )  
  • Gigabit Ethernet  (full-duplex ) -CWDM version only
AUX cards selection:
  • AUX204
1-channel bidirectional RS422
  • AUX205
2-channel bidirectional RS232
  • AUX206
2-channel bidirectional audio
  • AUX207
2-channel unidirectional audio output
  • AUX208
2-channel unidirectional audio input
  • AUX211
4-channel unidirectional audio input
  • AUX208
4-channel unidirectional audio output
  • AUX201
2-channel contact closure input
  • AUX200
2-channel contact closure output

Base Model F-4MSDI-TX/RX  support single mode fiber up to 20Km and it has ST/PC connector

Additional Model Selection :


XX = Optical connector : SC/PC , FC/PC (same price)
 YY = Fiber optic distance 40,60,80,100,120Km (add $)
ZZ = (MM) Multi-mode, (SM) Single-mode (same price)
  • update to 3G SDI

3G SDI supprted up to 3Gbps (add $)

Avialable on 4 CHannel CWDM F-4SDI-TX/RX unit

  • HD-SDI Input

HD-SDI, SD-SDI, or (DVB-ASI avialable on F-4ASI-TX/RX only)

0 - 1.5 Gbps Serial Digital Signal (3G optional)

  • Number of Input
 4 SDI
 1 RS-485
 1 Auxiliary 
  • Signal Level
> 380mVp-p
  • Impedance
  • Connector
  • Distance
20Km (40,60,100Km -optional)
  • Mini box
  • Power Supply
 130 - 260 VAC @ 50-60 Hz
  • Power Consumption
  • Temperature
 0 to +70 Degree
  • Humidity
0 to 95%
  • Connector
standard : ST/PC  and ( FC/APC or SC/PC optional)
  • Optical Channels
TDM type 
  • RH
  • LED Status Indic


Power / Link

 *All Specifiactions Subject to Change Without Notice

Similar products:

8 SD/HD-SDI + Ethernet over single fiber Transmission Kit

8 HD-SDI + Analog Audio + 10/100 Ethernet + RS422/485/232 DATA over single fiber

1 SDI & HDSDI Over Fiber Micro Extender

(SD/HD-SDI coax-to-fiber) throw-down converter. Transmit multi-rate SD/HD-SDI video, up to 1.485Gb/s, at extended distances up to 80Km over one strand of single mode optical fiber, better than a rattler. F-Micro-SDI transmitter and receiver kit for transporting HD-SDI, SD-SDI digital broadcast video signals over fiber cable. Provides 1 channel of RS-485 control data over a return path from the Rx back to the Tx.

Contact us

Thor Broadcast Sales

Email: Sales@ThorFiber.com
Phone: 1(800)521-THOR (8467) Ext 1
FAX: 1(800)521-6384

Customer Service/ Support

Phone: 1-800 521-THOR(8467) Ext 2
Email: Support@ThorFiber.com