User manual TUBE TECH MEC 1A

[. . . ] With the link switch it is possible to link several units together on two independent bidirectional buses. In normal operation the equalizer is in front of the compressor, but a switch enables the compressor to be in front of the equalizer. COMPRESSOR INTERCONNECTION: The side chain sockets for interconnection of several compressors are located on the rear panel. A switch (link1/link2) on the front selects which compressors are interconnected, and on which bus they are connected. Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 1 (980112) The interconnection implies, that the unit that performs the most compression is controlling the others. [. . . ] Hz: There are a choice of six frequencies: 20, 30, 50, 70, 100, 160 Hz. (The frequency is 3dB from max. /min. ) (Boost/cut) Determines whether the gain control shall be boosting or cutting. MIDBAND: GAIN: The gain control is continuously variable from 0 dB to 20 dB. Hz: There is a choice of twelve frequencies: 40, 60, 80, 130, 250, 500, 1k, 1, 6k, 2, 5k, 4k, 7k, 10k. BW: The bandwidth control is continuously variable from sharp to broad. (Boost/cut) Determines whether the gain control shall be boosting or cutting. HIGH SHELF: GAIN: The gain control is continuously variable from 0 dB to 15 dB. kHz: There is a choice of six frequencies: 4, 6, 8, 12, 18, and 26 (The frequency is 3dB from max. /min. ) (Boost/cut) Determines whether the gain control shall be boosting or cutting. EQ in/out: Switches the frequency network in and out. COMPRESSOR CONTROLS: RATIO: The ratio control varies the ratio by which the input signal is compressed. If the ratio selected is to 2:1, and the input signal increases 10 dB, the output signal is only increased by 5 dB. THRESHOLD: The threshold is the point where the compressor begins its action. The threshold is continuously variable from off to -20 dBm. COMP in/out: This switch defeats the compressor side chain circuit ATTACK: The attack control chooses how fast/slow the compressor responds to an increase in the input signal. The attack control is continuously variable from 1 to 100 milliseconds. Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 3 (980112) RELEASE: The release control chooses how fast/slow the compressor responds to a decrease in the input signal. The release control is continuously variable from 0, 07 to 2, 5 seconds. ATT/REL: There are two settings of the switch: There are two settings of the switch: 1. Fixed. Attack time: 1 msec Release time: 50 msec Attack time: from 1 msec to 100 msec Release time: from 0. 07 sec to 2, 5 sec link1-off-link2: Interconnects several compressors on bus 1or bus 2. If the switch is left in the mid position, the compressor works entirely independently. OUTPUT GAIN: The gain control is used to "make up" for the gain loss that takes place when the unit is compressing. I rs p si i" VU", and the amount of compression is shown as a t e t o i ns 0 ' s t o decreasing deflection in dB. NB: Leave the meter switch in position compression as it might introduce distortion if left in the output position. EQ-COMP/COMP. -EQ: In the position EQ-COMP, the signal from the mike-preamp. goes to the compressor and then to the equalizer. 4 Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark ADJUSTMENT PROCEDURE: CAUTION: Before making any adjustment let the unit heat-up at least 30 min. [. . . ] ADJUSTMENT OF COMPRESSION TRACKING: 1) Turn the THRESHOLD-control fully counter-clockwise. 6) Apply a DC-voltage of +250, 0 mV into the side chain jack socket (tip) and observe that the output level has dropped to -10, 0 dBU. 7) If this is not the case, adjust the level with P 12, to obtain a drop of exactly -10, 0 dB. 6 Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark ADJUSTMENT OF THE VU METER READING "COMPRESSION": 1) Turn the THRESHOLD-control fully counter-clockwise. [. . . ]