IEC 60958-4-4 pdf free download

IEC 60958-4-4 pdf free download.Digital audio interface – Part 4-4: Professional applications – Physical and electrical parameters.
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 100 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 2 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 60268-12, 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/AMD1:2014
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 sub code
IEC 6 1169-8, 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 .0 (type BNC)
ISO/IEC 11801, 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 128 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
4 Common features
All interfaces shall be subject to the common jitter requirements in accordance with Clause 5. Other parameters shall comply with the transmission type specified.
The interface should use the balanced transmission format specified in Annex B. The interface may use the format specified in Annex C or one of the alternative transmission formats to be specified in a future edition (see Annex D).
5 Jitter
5.1 Output interface jitter
5.1.1 General
Jitter at the output of a device shall be measured as the sum of the jitter intrinsic to the device and jitter being passed through from the timing reference of the device.
5.1.2 Intrinsic jitter
The peak value of the intrinsic jitter at the output of the interface, measured at all the transition zero crossings shall be less than 0,025 UI when measured with the intrinsic-jitter measurement filter.
The following aspects have to be considered.
IEC 60958-4-4 pdf download.