User manual BIAMP DLA93

[. . . ] DLA93 Digital-Logic Automixer Operation Manual ® Biamp Systems, 10074 S. W. Arctic Drive, Beaverton, Oregon 97005 U. S. A. (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. [. . . ] Aux Input Bus 1 & Bus 2 Pre/Post Jumpers: From the factory, Aux Input signals assigned to Bus 1 are post-VCA (affected by remote control) and Aux Input signals assigned to Bus 2 are pre-VCA (not affected by remote control). However, the Aux Input may be modified to provide pre-VCA signal to Bus 1 and/or post-VCA signal to Bus 2. To convert Bus 1 to pre-VCA: 1) Locate jumper positions near the center of the top circuit boards, in front of the Aux Input connector (J903 & J904). 2) Move existing jumper (0 ohm resistor) to the vacant `PRE' position (J904 to J903). 3) Solder both leads of the jumper, at the under-side of the circuit board. To convert Bus 2 signal to post-VCA: 1) Locate jumper positions near the center of the top circuit boards, in front of the Aux Input connector (J901 & J902). 2) Move existing jumper (0 ohm resistor) to the vacant `POST' position (J901 to J902). 3) Solder both leads of the jumper, at the under-side of the circuit board. 4 OPTIONS Input Isolation Transformers Channel Direct Output and Bus 1 & Bus 2 Pre/Post Jumpers J408 BUS1 J407 PRE POST R106 T101 R104 Patch jack J406 BUS2 LED Input connector rear panel D OUT J405 J404 J403 POST Output Isolation Transformers Aux Input Bus 1 & Bus 2 Pre/Post Jumpers T10 J102 J202 T9 J103 J101 J201 J203 J904 BUS1 PRE J903 Expansion In connector rear panel DIP switches POST BUS2 J901 J902 5 REMOTE CONTROL The DLA93 provides remote control terminals on a rear panel 15-pin Subminiature D (female) connector. Remote Control can be used with devices such as switches, potentiometers, resistors, diodes, and even Logic Outputs to perform a variety of remote control functions. 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). [. . . ] xfmr Level Main Output Input (mic/line) phntm. xfmr 30dB PAD Level +10 active automix EQ ---HPF main VCA exp. out logic control Remote Control filter log amp A-to-D conversion and central microprocessor compress NOM Logic Output Remote Control Hold Leveler Defeat meter Leveler meter select BLOCK DIAGRAM ic m st n e n ro tim lo ne te as ld an ch m ho la Aux Input exp. out sl av e 14 Aux Outputs exp. [. . . ]