EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of IEC EN 60958-4-4 testing. IEC EN 60958-4-4 specifies physical and electrical parameters for different environments. This section, in conjunction with IEC EN 60958-1, IEC EN 60958-4-1 and IEC EN 60958-4-2, provides an interface for serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from a transmitter to a receiver. specifies.
Specifies the physical signals transmitting the bitstream specified in IEC EN 60958-1. The transmission format is designed for use with traditionally designed shielded twisted pair cable at frame rates up to 50 kHz and distances up to 100 m. Longer cable lengths and higher frame rates can be used, but there is a rapidly increasing need for care in cable selection and possible receiver equalization or use of active repeaters. In this standard, it is foreseen that the balanced terminals will be adapted to use 75 Ω coaxial cable. Transmission via fiber optic cable is considered.
The vibration at the output of a device should be measured as the sum of the device-specific vibration and the vibration passing through the device's timing reference.
The peak value of the intrinsic vibration at the output of the interface measured at all pass zero crossings should be less than 0,025 UI when measured with the intrinsic vibration measurement filter. This jitter can be highly asymmetrical and deviation from ideal timing should meet specification in either direction. This requirement applies both when the equipment is locked to an effective jitter-free timing reference, which can be a modulated digital audio signal, and when the equipment is free running.
EUROLAB assists manufacturers with IEC EN 60958-4-4 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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