Rolls CL151 Compressor Manual & Schematic 电路图.pdf

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1、Quick Start Guide ROLLS CORPORATION SALT LAKE CITY, UTAH 03/10 PHANTOM POWER off on MIC INLINE IN SIDE CHAIN LINE OUT DC IN 12 VDC + - CL151 GLC Gate Limiter Compressor CL151 GLC Compressor/Limiter/ Gate SPECIFICATIONS Max Input: XLR: -10 dBm Balanced 1/4: +14 dBV Balanced Max Out: +14 dBV Balanced

2、Noise Floor: -72 dBV, Out Level Min, Gate Off Phantom Power: 12 VDC Frequency Response: 10 Hz - 30 kHz, +0 -3 dB Gate Release Time: 150 mS - 1 S Gate Attack Time: 5 mS Comp Attack Time: 5 mS Comp Release Time: 800 mS Power: 12 VDC 150 mA adapter (center negative) Weight: 1 lbs. (.45 Kg) Size: 4.15 x

3、 3.375 x 1.55 SCHEMATIC The plug connected to the Tip is the Send which will connect to the Input of the signal processing device, and the Ring is the Return which connects directly to the detector (compression control) circuit. Side Chain circuits are often used in ducking. Ducking is momentarily l

4、owering one sig- nal under another signal. For example, you may wish to automatically lower a music signal under a paging microphone signal, then have the music return to normal level after the page is over. This would be accomplished by running the music into the compressor, and having the page sig

5、nal connect into the Side Chain return. The page signal must also be connected to the main mixer or amplifi er 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. RadioFans.CN 收音机爱 好者资料库 INTRODUCTIO

6、N Thank you for your purchase of the CL151 GLC Gate Compressor Limiter. This unit pro- vides smooth, soft-knee compression and limiting with a gate. Gain reduction is indicated via a front panel 5-segment LED bargraph. Plus, the unit has a mic preamp input with 12 volts phantom power available. WARR

7、ANTY INFO Please visit our website, , for the Rolls 1 Year Warranty information and registration. 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,

8、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. COMP RATIO: This control se

9、ts the signal to compression ratio. This ratio relates to the amount of increase of input compared to output signal. Thus, at a 1:1 ratio, a 1 dB in- crease 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 o

10、utput signal. At 8:1, an 8 dB increase of input signal will result in a 1dB increase of output signal. THRESH: Sets the point that the input signal must reach for compression to begin. GAIN REDUCTION LEDs: This LED ladder indicates the amount of signal compression, or gain reduction. OUTPUT: Adjusts

11、 the amount of overall output signal from the CL151. PWR: Indicates that the CL151 is connected to the power source, and the unit is on. REAR PANEL MIC IN: Balanced XLR jack, for connection to any standard dynamic or condenser micro- phone. LINE IN: Balanced 1/4 TRS jack for connection to balanced o

12、r unbalanced line level signals. SIDE CHAIN: 1/4 TRS jack for connection via TRS insert cable to a device such as an equalizer or other device, for direct access to the CL151 detector circuitry. LINE OUT: Balanced 1/4 TRS jack for connection to a mixers line input or to an amplifi er. DC IN: For con

13、nection 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 cont

14、rols. CONNECTION AND OPERATION The example below shows the connection of a microphone. If the microphone requires phantom power, make sure the Phantom Power jumper is connecting the two pins closest to the front panel. Connect the output of the CL151 via a balanced or unbalanced 1/4 plug to the inpu

15、t of a mixer or amplifi er. Begin adjustments by setting the INPUT and OUTPUT levels at O (about 10 Oclock). This setting is for unity gain. Set the gate THRESH for off, the COMP RATIO for 1:1, and the compressor THRESH for +10. These initial settings essentially bypass the gate and compressor circu

16、its. 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 com- presses sooner. This works with the RATIO con

17、trol which, when increased, increases the amount of compression. The gate THRESH control, after being turned slightly counterclockwise from the off posi- tion, goes to its maximum level. This means it requires a higher signal level to open the gate. As the gate THRESH control is turned counterclockw

18、ise, 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 lev

19、el, and the REL time has passed. Connection Example USING THE SIDE CHAIN To access the compressor detector circuit directly, Rolls has included a Side Chain jack. The Side Chain works somewhat like an effects loop, with a send and return point. A 1/4 Tip-Ring-Sleeve Insert Cable is required to utilize the Side Chain. See the picture below. (Explanation continues on the next page) RadioFans.CN 收音机爱 好者资料库