Hs 000 System Administrator’s Handbook
Appendix B. Specifications
Audio
155
Audio selection
In-band audio with any of these line rates:
■
G.711 (64 Kbits per second, 3.4 KHz audio bandwidth)
■
G.722 (48 - 56 - 64 Kbits per second, 5.0 KHz - 7.0 KHz audio
bandwidth)
■
G.728 (16 Kbits per second, 3.4 KHz audio bandwidth)
Lip sync compensation is performed at all line rates.
Audio input
A built-in audio mixer in the expansion unit handles 3 microphone inputs
and one line-level input.
Additional inputs are provided for VCR audio and Multimedia input.
These inputs are treated independently; they are not mixed.
Audio line input (mixer input)
The Line In audio source is intended for use with microphone mixers
or for typical line level devices such as a tape deck, CD player, or
additional VCR.
Input impedance: 6 K ohms nominal through an RCA connector
Input level: ~10 dBv nominal
Clipping level: +6 dBv
Microphone input
Each of the three microphone inputs is pre-amplified to line level,
then all three are mixed through the audio line input.
