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Audio Fiber Mux

4 Channel RCA Broadcast Audio Fiber Transceiver

Overview
1-4channels of integrated audio audio optical transmitter / receiver adopt digital coding technology and the audio interface is RCA (Lotus seat) which can realize audio signals data signals digital signals and Ethernet signals through a single-mode fiber Distance bidirectional transmission the signal can be transmitted up to 100Km without distortion without repeating. 
Severalimportant indicators of audio optical transceivers are:
A、Bit rate:16bits 20bits 24bits,The higher the bit rate increase the more subtle changes in sound can be reflected.
B、Sampling accuracy:48K 96K 128K 196K (CD sampling accuracy is 44.1KHz / s),Professional audio optical transceivers generally use 48K sampling 96K 128K 196K is a future direction.
C、The signal-to-noise ratio is what we usually refer to as dynamic range. The unit is DB. The relationship between dynamic range and bit rate is: for each bit increase in bit rate the dynamic range increases by 6 dB. At 16 bits the dynamic range is 96db. This can meet the general needs and 24 bits can achieve a dynamic range of 144 dB which is fever-grade. So the current professional optical transceiver specifications can be summarized as: 24bit 48K sampling 90db.
Our audio optical transceiver the audio interface uses 24Bit AD / DA 128K sampling studio-grade transmission quality.
The audio optical transceiver is composed of an optical transmitter and an optical receiver and can be configured into 4 (2 stereo) two-way audio and 8 (4 stereo) unidirectional audio modes.
Features
◆ All-digital fiber optic transmission platform multi-service platform with flexible configuration;
◆ Can provide ordinary desktop mini desktop multiple ways of centralized card-type rack;
◆ Core of large-scale ASIC with independent intellectual property rights;
◆ The data interface and audio interface provide three levels of lightning protection which can pass the ITU-T K.21 (10 / 700μS) common mode: 6KV impedance (40Ω) test;
◆ Single fiber transmission optional dual fiber;
◆ Can detect when the remote device is powered off or fiber-optic when receiving no light;
◆ Audio adopts 24Bit AD / DA 128K sampling studio-grade transmission quality;
◆ Provides two-way asynchronous data (forward and reverse);
◆ Asynchronous data transmission rate above 110-115.200Kbps;
◆ Asynchronous data can be RS232 / RS485 / RS422 / Manchester code.
Parameters
Fiber
Multimode Fiber: 
50/125um or 62.5/125um,
Transmission diatance: 2Km  Multimode fiber,attenuation(3dbm/km )
wavelength: 850nm
Transmit power: -12dBm (Min) ~ -9dBm (Max)
Receive sensitivity: -28dBm (Min)
link budget: 16dBm
Singlemode Fiber: 
8/125um or 9/125um
Transmission diatance:20Km  Singlemode,attenuation(0.35dbm/km ) 
wavelength: 1310nm(Selective 1550nm wavelength for ultra-long distance transmission)
Transmit power: -9dBm (Min) ~-5dBm (Max)
Receive sensitivity: -27dBm (Min)
link budget: 18dBm
Audio port
Signal level:0.5~4Vp-p
Input / output impedance: 600Ω(unbalanced or balanced)
AD / DA-bit wide: 24Bit
Sampling frequency: 128K
Bandwidth: 20Hz~20KHz
Total harmonic distortion:<1%
Noise ratio (SNR):  >85dB
Physical interface: FJ45/RCA
Electrical and mechanical characteristics
System power: AC180V ~260V;DC –48V;DC +24V
Power consumption: ≤5W 
structure appearance:  93*70*25mm  Pocket
Environmental indicators 
Working temperature: -10℃—+60℃
Storage temperature: -40℃—+85℃
Working Humidity: 0%—95%(no condensation)
MTBF: >100000 hours
Application
4 Channel RCA Broadcast Audio Fiber Transceiver
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