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Resumen del manual
A conventional active balanced output would cause significant noise current resulting in more noise. Essentially, the servo-balanced output circuit behaves like a transformer balanced output because it maintains a constant level into balanced and unbalanced lines with a low differential impedance and a high common- mode impedance. The servo-balanced output also does not suffer from problems associated with output transformers such as low-frequency distortion, susceptibility to magnetic fields and poor frequency response. 3.3 Grounding The terminal strip has two ground connections, one for input ground and one for chassis ground. The equalizer is shipped with a jumper strap connecting these two grounds. Normally, this strap should be left in place so the chassis and input grounds are connected. In a rack- mount installation where the equalizer is connected to other equipment with unbalanced inputs or outputs and the rack itself provides a good electrical connection between the equalizer chassis and the other equipment, it may be desirable to remove this strap to isolate the input ground from chassis ground and avoid a ground loop. Unless you have such an installation and have a hum problem you can’t solve by other means (ie: using balanced input and output connections), leave the ground jumper strap in place. 4. AC POWER Your GQX equalizer should be connected to a standard 3-wire grounded electrical outlet supplying 120 Volts, 50-60 Hz (some export models are wired for 240 Volts, and are labeled as such). To reduce the risk of ground loop hum, connect all audio equipment to the same electrical power source. Removal of the ground pin is both unlawful and dangerous, as a potential shock hazard could result. This unit will perform normally within an AC voltage range of 93 to 130 volts. Voltages less than this, as found in “brown-out” conditions, will reduce headroom and decrease power supply regulation. While this may affect performance, the equalizer will continue to function during a brown-out. In the event of a blown fuse, replace only with same type fuse. No user serviceable parts are inside the chassis. Overall power consumption is less than 25 watts. Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 GQX Series Model 3101 Third Octave Graphic Equalizer Power 5. CONTROLS 5.1 Gain The gain control adjusts the overall gain of the equalizer when the EQ switch is “in”. It is generally used to compensate for level changes due to the equalization process, but can also allow the equalizer to adjust overall system level and gain structure. Overall gain with this control is from +6dB to -.. 5.2 High-Pass Filter The high-pass filter can be used to supplement the frequency response achieved by the bandpass filters. It’s function is to “roll off” the response below a given frequency to eliminate subsonic interference like wind noise, floor rumble, and microphone “pops”. The rolloff frequency is adjustable between 14Hz and 280Hz on the 31-band models, and is fixed at 40Hz on the 15-band model. 5.3 Equalization The individual equalization faders adjust the gain or loss at each filter frequency. There are 31 of these faders per channel on the GQX-3101 and GQX-3102 third octave models, and 15 faders per channel on the GQX1502 two-thirds octave model. By adjusting a combination of faders, an overall frequency response can be developed and the physical position of the faders will give an approximate visual indication of this response. 5.4 EQ Bypass Switch This switches the Graphic Equalization and gain adjustments. This way, the effect of any equalization can be compared to a “flat” response. This switch does not defeat the High-pass filter. 5.5 Range Switch This switch selects the operating range of the individual equalization faders between 15dB and 6dB on the two 31 band models. The 15dB settings should be used when this much equalization is needed. The 6dB setting allows finer resolution on the fader settings. 5.6 Level Meters On the GQX-3101 and GQX-3102 31 band models, a 10-segment, two color LED level meter indicates the output level of the equalizer. A Clip indicator LED on all models illuminates when any point in the equalizer signal path reaches a level within 3dB of clipping. 6. TYPICAL APPLICATIONS 6.1 General Tone Control The graphic equalizer is a very useful device for general tone shaping because it is intuitive and easy to adjust. The visual reference provided by the slider position gives an approximate idea of the frequency response generated, with the lower frequencies on the left and higher frequencies on the right. To use the power of an equalizer effectively, you need to translate your idea of the tone you want to produce into a range of numerical frequencies. This is simple after a little practise. Here are a few references which are useful for starting points: Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalize...
Otros modelos de este manual:Instrumentos Musicales - GQX-1502 (142.44 kb)
Instrumentos Musicales - GQX-3102 (142.44 kb)