User manual BIAMP VRAM

[. . . ] VRAM Variable Resource Automixer 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 September 7, 2005 VRAM TABLE OF CONTENTS Front & Rear Panel Features Setup Logic Inputs Logic Outputs RS-232 Control Specifications & Block Diagram Warranty pgs. 16 8 balanced mic/line inputs on plug-in barrier strip connectors 2 balanced auxiliary line inputs on plug-in barrier connectors balanced main & aux outputs on plug-in barrier connectors phantom power, trim, HPF, level, & gating on channels 1~8 model VRAMeq includes 3-band, variable-mid, channel EQ aux line inputs include mix-minus & teleconferencing mode independent mixing to main & aux outputs (pre/post gate) direct outputs from channels (programmable pre/post gate) eight logic outputs (programmable timing & pre/post gate) eight logic inputs (programmable for remote switch control) sixteen non-volatile memory presets store all mixer settings NOM attenuation, last mic, default mic, & hold time selectable selectable channel-off gating attenuation (-10dB to -80dB) expansion in & out for linking of units for more mixer inputs controls & indicators provided by software graphic interface software peak & level meters - front panel active indicators Windows 95/98/NT/2000/XP software & cable included ® INTRODUCTION The VRAM Variable Resource Automixer is a 10-in / 2-out programmable automatic mixer, which is completely user tamper proof, providing no external controls. All mixer parameters are under microprocessor control, and are ® easily programmed via Windows software. [. . . ] Clear allows all actions assigned to the selected button (or all buttons) to be cleared. Try It causes the actions currently assigned to the selected button to be performed by the VRAM. Close will close the Button Definitions screen. 7 SETUP LOGIC INPUT DEFINITIONS SCREEN The Logic Input Definitions screen is used to assign specific `actions' to the Logic Inputs (and remote control buttons). Logic Inputs allow remote control of the VRAM via external circuits, such as switches, contact-closures, active driver circuits, and/or `open-collector' logic outputs (see Logic Inputs on pg. From the factory, Logic Inputs 1~8 have no pre-programmed functions. However, using the Logic Input Definitions screen, each Logic Input may be assigned various `actions'. Logic Inputs select which Logic Input is to be defined. NOTE: Since Logic Inputs are controlled by switches, contact-closures, etc. , each Logic Input may be assigned certain actions to perform when the switch is `opened', and different actions to perform when that same switch is `closed'. Store Preset allows store actions for Presets 1~16 to be assigned to the selected Logic Input. Recall Preset allows recall actions for Presets 1~16 to be assigned to the selected Logic Input. Logic Outputs allows `on', `off', & `toggle' actions for Logic Outputs 1~8 to be assigned to the selected Logic Input. NOTE: Turning a Logic Output on/off will temporarily defeat its ability to follow channel gating activity, until again assigned to 'follow gate' (see pg. Echo Character allows the `echo' character for the selected Logic Input to be changed. NOTE: This is the RS-232 ASCII character which will be transmitted via the Serial Port whenever that Logic Input is switched. From the factory, no echo characters are assigned to Logic Inputs 1~8. Changing the Echo Character is used primarily for customizing remote control commands amongst various RS-232 controlled products within a system (see RS-232 Control on pg. Main Volume & Aux Volume allow specific volume & muting actions for Channels 1~8, Aux 1 & 2, Main Out, & Aux Out to be assigned to the selected Logic Input. NOTE: Although Logic Inputs volume actions include a `repeating' (volume ramp) function, they will not continuously repeat the echo character via RS-232. Clear allows all actions assigned to the selected Logic Input (or all Logic Inputs) to be cleared. Try It causes the actions currently assigned to the selected Logic Input to be performed by the VRAM. Close will close the Button Definitions screen. 8 SETUP LOGIC OUTPUT POLARITY SCREEN Normally, when a Logic Output turns `on' it provides a DC path to ground, which is then used to control `active-low' type circuits. The Logic Outputs Polarity screen simply allows this operation of the individual Logic Outputs to be reversed, for driving `active-high' type circuits. CONFIGURATION OPTIONS SCREEN The Configuration Options screen is used to select options which customize the operation of the VRAM. [. . . ] The Link Port of one device simply connects to the Serial Port of the next device, and so forth (see diagram below). Link cables are available as an option (Biamp #909-0057-00). NOTE: All but the final device in a system should have its `Link' switch pressed in (see Front & Rear Panel Features on pg. The Link Port may also transmit commands which are received via the Logic Inputs, depending upon the echo character assignments (see Setup on pg. [. . . ]