User manual BIAMP MODEL 21 SERIES MIXING CONSOLE

[. . . ] One of the channels includes a level "ducking" feature, which can be triggered when signal is present in selected other channels (see Ch 3/6 Duck on next page). This "ducking" feature is useful in page-over-music applications. Bass: This screwdriver-adjustable control sets the low-frequency equalization (Bass) for the Main Out section. Bass is a shelving type filter, which provides +/-10dB of gain adjustment for frequencies below 100Hz. [. . . ] -20 Indicator (Signal Present): This red LED indicates signal level at the Main Out is above -20dB (normal signal level). Once the Master Level control has been adjusted, this indicator will remain lit whenever signal is present at Main Out. Threshold: A limiter is provided at the Main Out section to help eliminate unwanted peaks in program signal level. This screwdriver adjustable control sets the threshold level, at which the limiter is activated. For most applications, set this control so the Limit Indicator flashes only on occasional peaks in signal level (see Limit Indicator below). Counter-clockwise adjustment lowers the threshold, increasing the amount of limiting. Clockwise adjustment raises the threshold, ultimately removing the limiter from operation. Limit Indicator: This red LED indicates when the limiter is activated by program signal levels that exceed the threshold setting. On Indicator: When the power transformer is plugged in, and AC power is applied to the mixer, the red On indicator remains lit. 2 REAR PANEL DC Power Supply: The included power supply module provides 24 Volt DC power to the mixer. To ensure compatibility, only use a Biamp Systems' supplied power supply. Main Out: These three terminals provide the electronically balanced Main Out from the mixer, wired with high to (+), low to (-), and ground to ( ). For unbalanced use, connect inputs with high to (+) and ground to both (-) & ( ). Phantom Power is available for operation of condenser microphones (see Phntm Switches above). Pad Switches: These switches reduce the channel input signal level by 30dB. Depress this switch when channel input signal levels exceed the normal operating range of the front panel Trim control. Pad is typically released for mic input and depressed for line input. 3 REMOTE CONTROL Remote Control: When using a slide potentiometer as a remote control, wire with High (T) to the voltage terminal (`V'), Wiper (W) to the control terminal ("C"), and Low (B) to the ground terminal (` '). When using a rotary potentiometer, wire with High (CW) to the voltage terminal ("V"), Wiper (W) to the control terminal ("C"), and Low (CCW) to the ground terminal (" "). Potentiometers should be linear taper, of any value from 5k ohms to 50k ohms, and may be wired up to 2000 feet from the mixer. If an on/off switch is utilized, "ON" position should connect the voltage terminal (`V") to the control terminal ("C"). Different wiring techniques, using both a potentiometer and a switch, can provide either level and mute functions or adjustable muting attenuation. NOTE: The rear panel Remote Enable switch must be depressed for remote controls to function (see Enable Switches on page 3). REMOTE CONTROL WIRING DIAGRAM toggle switch ccw off on rotary pot. w cw T slide pot. +10V C gnd W B 4 SPECIFICATIONS & BLOCK DIAGRAM 5 WARRANTY BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL 1. BIAMP Systems warrants to the original purchaser of new products that the product will be free from defects in material and workmanship for a period of 5 YEARS from the date of purchase from an authorized BIAMP Systems dealer, subject to the terms and conditions set forth below. [. . . ] Electro-mechanical fans, electrolytic capacitors, and normal wear and tear of items such as paint, knobs, handles, and covers are not covered under this warranty. BIAMP SYSTEMS DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. The remedies set forth herein shall be the purchaser's sole and exclusive remedies with respect to any defective product. No agent, employee, distributor or dealer of Biamp Systems is authorized to modify this warranty or to make additional warranties on behalf of Biamp Systems. [. . . ]