User manual BIAMP AUTOONE

[. . . ] autoONE Automatic Mixer Operation Manual Biamp Systems, 10074 S. W. Arctic Drive, Beaverton, Oregon 97005 U. S. A. (503) 641-7287 www. biamp. com blank 16Feb07 autoONE TABLE OF CONTENTS Front Panel Rear Panel Logic Outputs Specifications Block Diagram Warranty pg. 7 eight balanced mic/line inputs on plug-in barrier connectors trim, pad, level, & combined active/peak indicator per channel channel 1 manual `override' via external contact-closure channel 8 `mix-minus' assign & `ducking' via channels 1~7 balanced main & aux outputs on plug-in barrier connectors selectable last mic on, hpf, automix, & 24V phantom power selectable automix channel-off attenuation (-12dB or -40dB) pre/post automix assignment to main, aux, & patch outputs options selectable via external switches (no internal jumpers) logic outputs from channels for switching of external circuits Adaptive Threshold Sensing minimizes false gate triggering Speech-Frequency Filter minimizes false gating due to noise 6dB of hysteresis reduces gate `flutter' when near threshold `stacking' of two units to expand system input capability incorporates AES recommended grounding practices marked and UL / C-UL listed power source INTRODUCTION The autoONE Automatic Mixer is affordable, extremely versatile, and easy to use. Features include NOM attenuation, adaptive threshold sensing, speechfrequency filtering, manual priority override, selectable channel-off attenuation, and selectable last mic hold. [. . . ] The information shared is processed primarily by the `master' autoONE. To prevent system errors, the second autoONE mixer should be assigned as `slave' (see Master DIP Switches below). Channel 1 override can be achieved by shorting pins 3 & 6 (see Logic Outputs on pg. Main Output: These plug-in barrier strip terminals provide the balanced line-level Main Output from the mixer. For balanced connection, wire high (+), low (-), and ground ( ). For unbalanced connection, wire high (+) and ground ( ), leaving (-) unconnected. Signal level will be reduced by 6dB when output is unbalanced. Main Output level is affected by the front panel Master control, as well as by automatic NOM Attenuation, which reduces the output level by 3dB for each doubling of active (gated) channels. Aux Output: These plug-in barrier strip terminals provide the balanced line-level Aux Output from the mixer. For balanced connection, wire high (+), low (-), and ground ( ). For unbalanced connection, wire high (+) and ground ( ), leaving (-) unconnected. Signal level will be reduced by 6dB when output is unbalanced. Aux Output level is affected by the front panel Aux control, but not by automatic NOM Attenuation. Stack In: These plug-in barrier strip terminals provide a balanced line-level Stack In to the mixer. Signal entering here is combined with signals from the input channels, and is then sent to the Main Output section. When using multiple autoONE mixers within a system, connect Main Output of one mixer to Stack In of the next mixer, and so forth. All mixers except the final autoONE should be assigned as `slaves' (see Master DIP Switches below). For balanced connection, wire high (+), low (-), and ground ( ). For unbalanced connection, wire high (+) and ground to both ( ) & (-). 3 Main Patch: This 3-conductor TRS ¼" phone insert jack is for connection of certain BIAMP products or other external devices at the Main Output section. The Main Patch jack is pre-Master Level, and is wired Tip (send), Ring (return), and Sleeve (ground). Certain BIAMP products require a single TRS ¼" phone cable for connection. [. . . ] The autoONE Logic Outputs are most often used, in conjunction with external relays, to turn off specific speakers when nearby microphones are active (reducing feedback problems). For example, if a speaker is located directly above microphone #1, the Logic Output for Channel 1 of the autoONE can be used to turn off that speaker relay when microphone #1 is active (see diagram on next page). The Logic Outputs can also be combined (wired in parallel) to control a single circuit. To use logic `on' to turn on (or activate) a device, wire across the `normally open' relay contacts, in series with the device (or control voltage source). [. . . ]