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SDI / ASI Over Fiber



4 Channel HD-SDI Over Fiber Extender Kit with RS485 channel

Tech Specs
Application Drawing

QuestTel's L-4SDI-FE-HD-TX/RX is a reliable high performance, 4-channel HD-SDI video over singlemode fiber transmitter and receiver extender solution, which provides real-time, loss-free HD-SDI transmission audio embedded) over a single optical fiber cable. Furthermore QuestTel's 4CH PRO-SDI Gear provides a bi-directional RS485 data channel and optional audio/contact closure/RS422/RS232 data transmission, which can be widely used in TV live broadcast, high-definition video conference, high-definition video monitoring, intelligent transportation system and public security system. Fiber optical transmission excludes electromagnetic noise factor, it makes this product a perfect solution for efficient, reliable and secured SD/HD-SDI signal transport.

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4 Channel HD-SDI Over Fiber Extender Kit with RS485 channel

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    • Comply with SMPTE-292M HD-SDI and SMPTE-259M SD-SDI standard, supports 1.485Gb/s and 270Mb/s
    • L-4SDI-FE-HD-TX: four HD/SD-SDI input (BNC)
    • L-4SDI-FE-HD-RX: four HD/SD-SDI output (BNC)
    • Each SDI channel includes 2-channel audio embedded
    • One bi-directional RS485 channel, half duplex, up to 115.2Kb/s baud rate
    • One auxiliary channel, which can be 2-channel bi-directional audio, or 2-channel unidirectional audio, or 4-channel unidirectional audio, or 2-channel contact closure input/output, or 1-channel bi-directional RS422 , or 2-channel bi-directional RS232 channel
    • Supports 1080P@30,25,24, 29.97, 23.98, 1080I@60/50/59.94, 720P@60/50/30,25/24,29.97/23.98 and 625i / 525i formats
    • DVB-ASI data passthrough support
    • With integrated cable equalizer
    • Embedded ESD and surge protection circuit to prevent damage from static and thunder
    • With alarm indications, output status indicator and input lock indicator
    • With APC circuit to perform stable optical power
    • Engineered for reliability and exceptional high resolution image performance
Tech Specs


HD-SDI Interface  
Connector BNC
Fiber Connector ST/PC
Bit rate 1.485Gb/s and 270Mb/s auto adaptive
Impedance 75Ω
Return loss >15dB
Output level 800mVp-p±10%
Rise and fall time?HD-SDI? ≤270ps
Rise and fall time?SD-SDI? ≤1.50ns
SD-SDI Alignment jitter (1KHz) ≤0.2UI
SD-SDI Timing jitter (10Hz) <0.2UI
HD-SDI Alignment jitter (100KHz) ≤0.2UI
HD-SDI Timing jitter (10Hz) <1.0UI

Comply to SMPTE-292M HD-SDI and

SMPTE-259M SD-SDI standard

Audio Interface (Optional)  
Connector PHOENIX connector
Quantization grade 20 bits
Sample frequency 48KHz
Audio input/output voltage 2VP-P
Bandwidth 20Hz~20KHz
Total Harmonic Distortion 0.1%
RS485 Interface  
Connector PHOENIX connector
Baud rate 0~115.2Kb/s
Bit error ratio <10-9
Duplex Half-duplex
CONSOLE Interface  
Connector RJ45
Baud rate 19200
bits 8
Stop bit 1
parity check None
EMU/EMU-EX Interface  
Connector RJ45
Bit rate 10Mb/s or 100Mb/s auto adaptive
Power and Consumption for desktop equipment  
Power supply DC 12V
DC input voltage range 8V~14V
Power consumption 3W±10%
Environment Requirements  
Working temperature -30C - 60C
Relative Humidity ≤95%, no condensation
Storage temperature -40C - 85C
Equipment dimension  
Equipment dimension 180mm x 123mm x 30mm


L-4SDI-FE-HD-TX-RX SDI Over Fiber  Pdf User Guide 


Disclaimer: Products, specifications and data are subject to change without notice, to improve reliability, function, design or otherwise.

QuestTel shall have no liability for any error or damage of any kind resulting from the use of this document.
Application Drawing 4 Channel HD-SDI Over Fiber Extender Kit with RS485 channel's Application Drawing
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