Ericsson RX8000 - Audio Alignment Levels; Digital Audio Outputs; Supported Audio Bit Rates

Technical Specification
EN/LZT 790 0005 R7A
B-15
B.1.2.11 Supported Audio Bit Rates
Table B.12 Supported Audio Data Bit Rates (MPEG-2)
Mono (kbps) Stereo (kbps)
32 64
48 96
56 112
64 128
80 160
96 192
112 224
128 256
160 320
192 384
B.1.2.12 Digital Audio Outputs
Digital audio outputs comply with E1A-4221 and have a max. data rate of
3.072 Mbps.
Digital audio is output on two 9-way, D-type and four BNC connectors.
Audio output is balanced 2 – 7 Volts.
B.1.3 Audio Alignment Levels
In broadcasting a signal coding level is recommended so that digital/analog audio
signals can easily be exchanged between equipment. Two recommendations are
applicable:
• SMPTE RP155 Reference Level for Digital Audio Systems. For professional
equipment the SMPTE Alignment Level specifies that a digital signal level of -
20 dBFS will equal an analogue signal level of +4 dBu.
• EBU Technical Recommendation R68-2000. For professional equipment the
EBU Alignment Level specifies that a digital signal level of -18 dBFS will equal
an analogue signal level of 0 dBu.
1
EIA-422-A-1978: Electrical characteristics of balanced voltage digital interface circuits.