4 Channel Audio RCA to Fiber Optic Converter

The audio optical transmitter/receiver adopts 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.

Several important indicators of audio optical transceivers are:

1. Bit rate: 16bits 20bits 24bits, The higher the bit rate increase, the more subtle changes in sound can be reflected.

2. 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.

3. The signal-to-noise ratio is what we usually refer to as the 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 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.

The audio interface uses 24Bit AD/DA and 128K sampling, and it has 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) bidirectional audio and 8 (4 stereo) unidirectional audio modes.

● 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.

● Fiber

Multimode Fiber:

50/125um or 62.5/125um

Transmission distance: 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 distance: 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

● Power

System power: AC180V ～260V; DC –48V; DC +24V

Power consumption: ≤5W

● Environmental Indicators

Working temperature: -10℃—+60℃

Storage temperature: -40℃—+85℃

Working Humidity: 0%—95%（no condensation）

MTBF: ＞100,000 hours