User manual BIAMP 801

[. . . ] TM 801 Mic/Line Mixer Operation Manual Biamp Systems, 10074 S. W. Arctic Drive, Beaverton, Oregon 97005 U. S. A. an affiliate of Rauland Borg Corp. (503) 641-7287 www. biamp. com blank print update June 17, 2002 801 TABLE OF CONTENTS Front Panel Rear Panel Options Applications Specifications & Block Diagram Warranty pg. 8 eight differential balanced mic/line inputs & one aux line input discrete transistor mic/line preamps for low noise & distortion optional mic/line input isolation transformers (user installed) +24 volt phantom power selectable on each mic/line input optional +48 volt phantom power supply (user installed) aux input switch selectable for balanced or stereo summing aux input 'auto-ducking' switch selectable on channels 1~8 front panel trim and rear panel pad switch on each channel +10dB 'peak' LED indicator on each channel for easy set-up high-pass 'rumble' filter switch selectable on each channel mic/line & aux inputs on plug-in barrier strip connectors 1/4" patch insert jack on each channel and at main output balanced main output on plug-in barrier strip connector main output limiter with threshold control and LED indicator main out Bass & Treble control with rear panel bypass switch -20dB signal present & power LED indicators at main output channel 1 / priority override via rear panel switch terminals optional remote control of main out via external level control optional main output isolation transformer (user installed) stack in & slave switch to add inputs by linking multiple units DC Out jack for powering certain other BIAMP products covered by Biamp Systems' five-year warranty marked and UL / C-UL listed power source INTRODUCTION The 801 is a single rack-space mixer, with eight mic/line inputs and one auxiliary line input. Each mic/line channel uses a differentially balanced, discrete transistor preamplifier for low noise and low distortion performance. [. . . ] Input (Channels 1~8 & Aux): These plug-in barrier strips provide the balanced mic/line Inputs to the mixer (Channels 1~8 only). Input isolation transformers (model IT-A) are available as a user installed option (see Options on pg. For balanced connection, wire high (+), low (-), and ground ( ). For unbalanced connection, wire high (+) and ground to both ( ) & (-). Phantom power (+24VDC) is available (see DIP Switches below), with +48V phantom power as an option (model 48VPS) (see Options on pg. The Aux input accepts either balanced mono line input or unbalanced stereo line input (see DIP switches below). Aux input cannot accept mic input signal, or the optional input isolation transformer, and does not provide phantom power. Master DIP Switches: These switches assign functions to the mixer as a whole (when pushed up). Slave assigns the mixer as an expander to a `master' mixer. Tone Out bypasses the front panel tone controls (Bass & Treble). Override allows automatic muting of all other inputs when signal is present in Channel 1. Remote allows remote control of Main Output level, by enabling the Remote terminals (see above). DIP Switches (Channels 1~8 & Aux): These switches assign functions to the individual inputs (when pushed up). Pad attenuates channel signal -18dB (-10dB at Aux) for line input. Priority disables Channel 1 Override muting for that channel. Phantom (Channels 1~8 only) turns on phantom power (for condenser mics). Duck Aux (Channels 1~8 only) allows channel signal presence to activate -15dB attenuation at Aux input (ducking). HP Filter enables a high-pass filter on the input (6dB/octave @ 170Hz). Sum (Aux only) converts Aux from standard balanced input to stereo (L/R) summing input. 3 OPTIONS Override: Channel 1 Override can be manually triggered by an external switch wired across pins 3 & 6 of the DC Out jack (see diagram on next page). Channel 1 Override can also be triggered automatically by signal present in Channel 1 (see Master DIP Switches on pg. When additional 801 mixers are being used (for more inputs), pins 3 & 6 of the various DC Out jacks can be wired together (in parallel). This allows Channel 1 Override triggering (manual or automatic) to be transmitted to all 801 mixers in the system. [. . . ] MADE IN U. S. A. signal / peak signal / peak signal / peak FUSE signal / peak signal / peak OFF OFF OFF OFF OFF OFF OFF OFF OFF level level level level level level level OFF OFF OFF HPF BRIDGE HPF HPF BRIDGE HPF HPF BRIDGE HPF input input input input input input input HPF BRIDGE HPF This application shows an 801 mixer connected with other BIAMP products to provide a 4-zone paging & background music system with page routing, music source selection, override, and amplification. The 801 mic inputs have phantom power (for condenser mics) and high-pass filter (for speech signals) assigned. Patch jacks are used as channel direct outputs, which feed into line inputs of a PMX84. The PMX84 provides an 8x4 matrix, with mic switches wired to Logic Inputs for page routing & override. [. . . ]