COVID-19: Canford remains open for business and web orders are being processed normally. Please see our Coronavirus statement for the latest updates.

UK Sales: 0191 418 1122         International: +44 191 418 1133


  • Next day delivery
  • Free standard UK delivery
    on all orders over £100
  • Industry leading
    customer service
  • Free technical support
    from our team of experts


Without special equalisation and recovery equipment conventional AES-3 digital audio signals are limited to a range of 100 metres over twisted-pair cable. This is a bi-directional interface to two ST-fibres and is used in pairs. AES-3 signals may be sent and received between the two interfaces across two ST-fibres up to 2000 metres long, providing digital audio transmission between buildings campus-wide.


The transformer-balanced AES-3 input is equalised for medium length cables of up to 200 metres and modulates an ST-fibre transmitter. Sample rates of 24kHz to 200kHz are supported. A status LED indicates the integrity of the input signal. The receiving fibre signal is recovered and passed to a transformer-balanced AES-3 output. A bi-colour LED indicates the integrity of the received signal, and also warns of low-level fibre input.

The AES-3 input and output are XLR-3F and XLR-3M respectively, both transformer balanced and earth-free. Power is applied through a 2.5mm coaxial connector. Two ST-fibre connections are provided on the front panel, one for the sending fibre, one for the receiving fibre. Fibre: 50 or 62.5 micron types.

AES-3 input: Impedance 110 ohms, minimum level 200mV peak to peak. AES-3 output: Impedance 110 ohms, 3V peak to peak loaded. Power source: 8 - 30V DC, recommended 12-24V, 120mA at 12V. Dimensions: 94 x 52 x 108 (w x h x d) mm. Weight:250g.

Included accessories: Instructions
Optional accessories: Power supply 23-8904. See BCD rack mounting panels - Extruded box for details of rack mounting-options and see Extruded Boxes Mounting Kits for fixing to flat surfaces.

  Description Price £
ex. VAT
Add to basket
Show carriage
BCD FAB-1 AES-3 AUDIO TO ST-FIBRE INTERFACE Bi-directional AES/EBU, requires 2x fibres and DC power   Stock code: 20-238
Please login for stock availability and lead times.