MM-8802 Break-out-Boxes

The MM-8802 breakout box accepts eight channels of analog audio inputs with 24-bit converters, and provides eight channels of low impedance line level analog audio outputs (also with 24-bit converters). The inputs can be line-level or microphone level in groups of four with the selection of either the MM Line 4 or the MM Mic 4 (any combination of the two cards can be supported in each MM8802.  Additionally, each breakout box has eight input control ports (0-10V) and eight output control ports (5 Volt TTL).  The MM-8802 automatically uses whichever sample rate is currently compiled in MediaMatrix (32k, 44.1k or 48k). The sample rate is selected by setting the MediaMatrix software to the desired sample rate (in the File | Compile Options Menu).

The Breakout Boxes produce a large amount of heat. Therefore it is necessary to provide adequate cooling. Peavey recommends that at a minimum, a blank panel be provided above each two BoB's in a rack. Another option is to fan cool the rack. See the Analog BoB Hardware section of this help file for wiring and level adjustment details.

One other factor in deciding on BoB's, is the fact that analog BoB's must be located in close proximity to the MediaMatrix computer. The MM-8802 supports both the "legacy" DB-9 "BoB Cable" style that is limited to 6' and requires a special cable, that cannot be extended if the device is to work properly. This "legacy" cable is not included in the MM-8802 box, but can be purchased if necessary.  The preferred method of connecting the MM-8802 to the frame is the new "RJ" dual-CAT5 standard.  By using two standard CAT5 "network" cables, you can extend the MM-8802 up to 50' away from the frame.  While you can use standard Ethernet cable with the EIA/TIA 568B wiring standard, this BoB-to-frame standard is NOT Ethernet.  To use the new RJ-type wiring, you must have a MM-DSP-RJ card in your frame.  If you wish to locate the BoB more than 50' away from the MediaMatrix computer, you should use CobraNet CAB devices (see below).  WARNING: You cannot connect either the BoB or the frame to any Ethernet equipment (at least if you want either to work).