scope:

This Part of IEC 60958-4 specifies the physical and electrical parameters for different media. 132 It is one of four sub-parts that together specify an interface for the serial digital transmission 133 of two channels of periodically sampled and linearly represented digital audio data from one 134 transmitter to one receiver. 135 The transport format defined in IEC 60958-1 is intended for use with shielded twisted-pair 136 cable of conventional design over distances of up to 100 m without transmission equalization 137 or any special equalization at the receiver and at frame rates of up to 50 kHz. Longer cable 138 lengths and higher frame rates may be used, but with a rapidly increasing requirement for 139 care in cable selection and possible receiver equalization or the use of active repeaters, or 140 both. Provision is made in this standard for adapting the balanced terminals to use 75-Ohm 141 coaxial cable, and transmission by fibre-optic cable is under consideration. The document 142 does not cover connection to any common carrier equipment. In this interface specification, 143 mention is made of an interface for consumer use. The two interfaces are not identical.