User manual PEAVEY MEDIAMATRIX CAB 8I DATASHEET

[. . . ] Each input channel has software controlled, continuously variable analog input gain from -9 dB to +60 dB in 1 dB steps. The CAB 8o downloads eight channels of line-level analog audio signals from an Ethernet network. Maximum output levels are individually jumper-selectable between +24 dBu, +18 dBu, +12 dBu, and +6 dBu. [. . . ] ¥ Eight with 20-bit transmission quantization selected ¥ Seven with 24-bit transmission quantization selected Audio specifications are measured with the input fed into the CAB 8i, digitally transmitted through an Ethernet hub, and the output fed out of the CAB 8o where relevant. CAB 8i: The Peavey CAB 8i shall provide eight channels of either microphone or line-level audio transmitted onto an Ethernet network. It shall provide full-bandwidth, high-quality audio transmission via 100BaseT (fast) Ethernet without lossy compression techniques, drop-outs or signal degradation by employing CobraNet audio transmission protocol to make Ethernet signal distribution deterministic. It shall employ 24-bit A/D converters with 20- or 24-bit selectable transmission quantization utilizing a 48 kHz sampling rate. It shall have a dynamic range of 95 dBA and 93 dB unweighted for line-level signals, and an equivalent input noise level of Ð124 dB for microphone level signals. Input-commonmode-rejection ratio (CMRR) shall be greater than 65 dB at any gain setting. Maximum input level without clipping shall be +38 dBu while maintaining specified CMRR. Control features shall include eight relays with both normally open and normally closed contacts, and eight channels of TTL control outputs, both of which are software controllable via an Ethernet link. Also included are eight channels of analog voltage-control ports that allow external switches, potentiometers or voltage sources to control MediaMatrix software parameters via an Ethernet link. Front-panel indicators shall display the following status conditions: signal transmission, signal reception, transmission error, reception error, fault indication, link indication, conductor status, RS-485 control indication, and power presence. It shall have eight peakreading headroom meters to monitor the Analog level present at the input to the A/D converters, with the top-most red LED indicating A/D clipping. Rear panel features shall include a detactable AC power cord, an AC power switch, and an AC power receptacle with a built-in auto-resetting circuit breaker. It shall have two word-clock connectors to enable auto-switch-over should a unit fail. it shall employ detachable , euro-style , bare-wire capturing , screw-terminal connectors for ease of hook-up and trouble-shooting. [. . . ] These connectors shall be used for all line-level, control-voltage, TTL, relay, and RS-485 connections. The unit shall use a standard eight-conductor RJ-45 I/O jack for Ethernet connection. ), and its 1 rack-unit (1 3/4"), fan-cooled, steel chassis, shall be finished in grey powder coat. [. . . ]