User manual BIAMP DLA93

[. . . ] DLA93 Digital-Logic Automixer Operation Manual ® Biamp Systems, 10074 S. W. (503) 641-7287 http://www. biamp. com an affiliate of Rauland-Borg Corp. DLA93 TABLE OF CONTENTS Front & Rear Panel Features Options Remote Control Logic Outputs Applications Block Diagram Specifications Warranty pgs. 15 o eight mic/line input channels with pad, trim, & peak indicator o balanced differential mic/line preamp circuitry (xfmr option) o input & direct output for each channel on plug-in barrier strip o patch insert point for each channel on TRS 1/4" phone jack o phantom power & HPF switch selectable for each channel o automatic mixing function switch selectable for each channel o output bus assignments switch selectable for each channel o level & tone controls, plus active indicator, for each channel o additional auxiliary line input channel on plug-in barrier strip o aux input switch selectable for balanced or L+R sum signals o aux channel includes level, tone, HPF, & output assignment o Main, Aux 1, & Aux 2 outputs with independent level control o each output balanced on plug-in barrier strip (xfmr options) o Aux 1 & Aux 2 switch selectable for pre or post automixing o Main output leveler, plus compression on individual channels o remote control of inputs/outputs, automixing, & combining o logic outputs for active channel control of external switching o expansion in & expansion out for linking of multiple DLA93s o automixing, linking, & last mic on modes switch selectable o active channel hold time switch selectable (0. 4 or 1 second) o 10-segment meter displays output level or gain reduction o front panel security cover included to prevent tampering o incorporates AES recommended grounding practices o marked and UL / C-UL listed power source o covered by Five-Year "Gold Seal" Warranty INTRODUCTION The ADVANTAGE DLA93 Digital-Logic Automixer provides nine input channels and three independent outputs, with automatic mixing functions controlled via microprocessor. Input functions such as automixing, phantom power, high-pass filters, and output assignments are selectable on individual channels. [. . . ] These devices may be wired up to 2000 feet from the DLA93, and can be configured for functions such as: level adjustment & muting for individual or grouped inputs/outputs; manual/automatic `chairman override' of multiple inputs; manual/automatic `page-override' of music input; multi-level `priority override'; selection of automatic/manual mixing; room combining; etc. See diagrams on next page for some examples of remote control wiring for specific applications. Remote Control terminals are provided for Channels 1~8, Aux Channel, Main Output, and Aux 1 Output (see diagram below). These terminals have internal pull-up resistors, which keep them at a high idle state of +10 Volts. Therefore, no Remote Control connections are necessary to keep these signals turned on. However, a variable control voltage (0~+10 VDC) can be used to control these signal levels (+10 VDC = unity gain; 0 VDC = -80dB). The DLA93 provides +10V and ground terminals (for use with potentiometers), but an external `ramp' voltage may be used instead. Potentiometers should be 25k linear taper (Biamp #170-0001-20), and are wired with the high-side to +10V, the wiper to the desired control terminal(s), and the low-side to ground (see diagrams on next page). The wiper of a single potentiometer may be wired to multiple control terminals (to control a group of signals). However, wipers from multiple potentiometers should not be connected to a single control terminal (causes undesirable interaction). Switches, Logic Outputs, or other contact-closures are used to provide muting of the input/output signals, by simply shorting the respective control terminal(s) to ground (see diagrams on next page). A switch may be wired to multiple control terminals (to mute a group of signals). Multiple switches may be wired to a single control terminal, but if multiple switches are connected to multiple control terminals a diode matrix may be necessary (see diagram on next page). The combination of potentiometer & switch can be used to perform level adjustment & muting, or to provide an adjustable amount of `ducking' attenuation. Use of the DLA93 Logic Outputs in conjunction with the Remote Control terminals can provide various `automatic' functions. Many other possible uses of the Remote Control terminals exist, which are not mentioned here. Two additional Remote Control terminals are provided, which allow master/slave assignment and selection of automatic/manual mixing. These terminals have internal pull-up resistors, which keep them at a high idle state of +5 Volts. Switches or other contact-closures are used to short these terminals to ground. The master/slave terminal provides the same function as the `slave' switch on the DLA93 rear panel (see Master DIP Switches on pg. NOTE: The rear panel DIP switch must be in the down (`master') position for the Remote Control terminal to function. When multiple DLA93s are linked together, shorting the master/slave terminal to ground assigns the DLA93 as a `slave' unit. [. . . ] Two switches, at the judge's bench, are wired to DLA93 Remote Control terminals. An `override' switch mutes all inputs except the judge's mic. A `conference' switch mutes all inputs except a special conference mic at the judge's bench. The conference mic is not assigned to any output, but is for recording purposes only. [. . . ]