IEC 60958-4-4-2016 pdf download.Digital audio interface – Part 4-4: Professional applications – Physical and electrical parameters.
This part of IEC 60958 specifies the physical and electrical parameters for different media. This part together with IEC 60958-1 , IEC 60958-4-1 , and IEC 60958-4-2 specify an interface for the serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. The transport format defined in IEC 60958-1 is intended for use with shielded twisted-pair cable of conventional design over distances of up to 1 00 m without transmission equalization or any special equalization at the receiver and at frame rates of up to 50 kHz. Longer cable lengths and higher frame rates may be used, but with a rapidly increasing requirement for care in cable selection and possible receiver equalization or the use of active repeaters, or both. Provision is made in this standard for adapting the balanced terminals to use 75 Ω coaxial cable, and transmission by fibre-optic cable is under consideration.
This standard does not cover connection to any common carrier equipment. In this interface specification, an interface for consumer use is also mentioned. The two interfaces are not identical.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60268-1 2, Sound system equipment – Part 12: Application of connectors for broadcast and similar use
IEC 60603-7 (all parts), Connectors for electronic equipment – Part 7: Detail specification for 8-way, unshielded, free and fixed connectors
IEC 60958-1 :2008, Digital audio interface – Part 1: General
IEC 60958-1 :2008/AMD1 :201 4
IEC 60958-4-1 , Digital audio interface – Part 4-1: Professional applications – Audio content
IEC 60958-4-2, Digital audio interface – Part 4-2: Professional applications – Metadata and subcode
IEC 61 1 69-8, Radio-frequency connectors – Part 8: Sectional specification – RF coaxial connectors with inner diameter of outer conductor 6,5 mm (0,256 in) with bayonet lock – Characteristic impedance 50 Ω (type BNC) ISO/IEC 1 1 801 , Information technology – Generic cabling for customer premises 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
3.1 unit interval
UI shortest nominal time interval in the coding scheme
Note 1 to entry: There are 1 28 UI in a sample frame. See Annex A.
Note 2 to entry: This note applies to the French language only.
3.2 interface jitter
deviation in timing of interface data transitions (zero crossings) when measured with respect to an ideal clock
3.3 intrinsic jitter
output interface jitter of a device that is either free-running or synchronized to a jitter-free reference
3.4 jitter gain
ratio of the amplitude of jitter at the synchronization input of a device to the resultant jitter at the output of the device
Note 1 to entry: This definition excludes the effect of intrinsic jitter.
Note 2 to entry: The ratio is expressed in decibels.
3.5 frame rate
frequency at which frames are transmitted.IEC 60958-4-4 pdf download.