User manual ROLLS CL151

[. . . ] The page signal must also be connected to the main mixer or amplifier as well. When the paging signal begins, its signal goes to the main mixer and the Side Chain circuitry. The music is compressed or "ducked" under the page. CL151 GLC Compressor/Limiter/ Gate MIC IN LINE IN SIDE CHAIN LINE OUT DC IN 12 VDC PHANTOM POWER off on + - SCHEMATIC GLC Gate Limiter Compressor CL151 SPECIFICATIONS Max Input: Max Out: Noise Floor: Phantom Power: Frequency Response: Gate Release Time: Gate Attack Time: Comp Attack Time: Comp Release Time: Power: Weight: ROLLS CORPORATION SALT LAKE CITY, UTAH 03/10 Size: XLR: -10 dBm Balanced 1/4": +14 dBV Balanced +14 dBV Balanced -72 dBV, Out Level Min, Gate Off 12 VDC 10 Hz - 30 kHz, +0 -3 dB 150 mS - 1 S 5 mS 5 mS 800 mS 12 VDC 150 mA adapter (center negative) 1 lbs. [. . . ] The compressor RATIO and THRESH controls work together to control the amount of compression, and the point at which compression begins respectively. Decreasing the THRESH control lowers the amount of signal required to begin compression - so it compresses sooner. This works with the RATIO control which, when increased, increases the amount of compression. The gate THRESH control, after being turned slightly counterclockwise from the "off" position, goes to its maximum level. This means it requires a higher signal level to "open" the gate. As the gate THRESH control is turned counterclockwise, a lower and lower signal is required to open the gate. The gate REL (release time) control sets the amount of time taken for the gate to "close" after the signal drops below the THRESH level. For example, the CL151 will continue passing a sustaining note until the level drops below the THRESH level, and the REL time has passed. FRONT PANEL INPUT: Adjusts the amount of input signal to the CL151, from no signal to +20 dB. GATE REL: This control adjusts the amount of time taken for the gate circuitry to "close" or mute the output, after the signal level has dropped below the gate Threshold level. THRESH: Sets the point at which the input signal must surpass to "open" the gate circuitry or allow signal to pass to the output. GATE LED: When lit, indicates that the gate is "closed" or the output is muted. This ratio relates to the amount of increase of input compared to output signal. Thus, at a 1:1 ratio, a 1 dB increase of input signal will result in a 1 dB increase of output signal. At 2:1, a 2 dB increase of input signal will result in only 1 dB increase of output signal. [. . . ] DC IN: For connection to the Rolls PS27 12 VDC, 150 mA power supply; outside of the barrel is positive. SIDE PANEL PHANTOM POWER: Jumper header for connecting 12 VDC phantom power to the XLR Mic Input. Phantom power is engaged by carefully removing the jumper, and reconnecting it to the pins toward the CL151 controls. Connection Example USING THE SIDE CHAIN To access the compressor detector circuit directly, Rolls has included a Side Chain jack. [. . . ]