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Фрагмент инструкции
High Pass Filter The high-pass filter allows all the frequencies above a specific frequency to pass, whereas it cuts all the frequencies below it. LPF HPF LPF HPF P r L T h OP 1 F u 1k 00 H z 0 P r H T h OP 1 F u 1k 00 H z Signal segment obtained with the combination of LPF and HPF. 19 Each filter has the following editable parameters: Type of filter Allows to choose three different types of filter and different attenuation slopes: Butterworth (But) at 6, 12, 18 or 24dB per octave, Bessel (Bes) at 12, 18 or 24dB per octave, Linkwitz-Riley (LR) a 12, 24 or 48dB per octave. By setting the Thru value, the filter is disabled and the signal passes without its frequency being altered. OP 1 L P F 2k 00 zH B es 0 24 Crossover frequency Allows to choose the filter cutoff frequency. OP 1 L P F 1k 46 zH T hr 0 u Phase Allows fine control (in 5 steps) of the signal's phase. The effect of this control is summed with that of the Output Polarity function (0 ~ 180 ). In this way it's possible to adjust the phase of each individual output with 5 steps through a full 360 . Note: this control is only in the Low-Pass Filter window. OP 1 L P F 1k 00 zH T hr 0 u 81 The values can be set in the following ranges: XOVER NAME TYPE SLOPE FREQ PHASE LPF Thru 0~ 180 (Stp 5 ) But Butterworth 6, 12, 18, 24 dB/oct 15.6Hz ~ 16KHz Bes Bessel 12, 18, 24 dB/oct LR Linkwitz-Riley 12, 24, 48 dB/oct HPF Thru Hish 6 Butterworth 6, 12, 18, 24 dB/oct 15.6Hz ~ 16KHz Hish 12 Bessel 12, 18, 24 dB/oct Notch Linkwitz-Riley 12, 24, 48 dB/oct 20 5.3.4 Output EQ Output equalizer with 5 parametric filters. Also called Channel EQ, allows to alter the tone of each individual output. The characteristics of quality and programmability are identical to those of the Input Equalizer and enable this unit to be used extremely effectively and flexibly. Ou t p u t E Q Each equalizer has 5 pages (one per filter), indicating the name of the output it effects and the number of the filter. Q a E P e OP 1 1 k 2k Example: Output 1 -Filter 1 . +1 . 5 00 1 0 Since technical specifications and editing fields of the Output EQ are identical to those of the Input EQ, please refer to INPUT EQ section for descriptions. 5.3.5 Output Gain Output level control Allows to adjust the signal level of each individual output. Ou t p u t Ga i n Editing values are between +6dB ~ -30dB, with 0.5dB steps. OP 1 GA I N -6 . 5 d B Note: The level of each output is shown by the respective OUTPUT LEVEL LED ladder. To avoid distortion, don't let the red CLIP LED light up. As automatic protection, you can also enable the LIMITER (EDIT menu) on the outputs that require it. In this case, remember that enabling the LIMITER changes the display mode on the relative LED ladder: in fact, the level shown is no longer the absolute output level, but the level of the signal In relation to the LIMITER threshold. 5.3.6 Output Pol Controls the output's polarity. Allows to invert the phase of the signal of individual outputs. Ou t p u t P o l Editing values are: 21 Normal: leaves the phase unchanged Reverse: shifts the phase through 180 , inverting it. OP 1 N o rm PO L A a I RI T Y OP 1 e v er PO L A s e RI T Y R The effect of this control is summed with that of the parameter of the LPF filter ( Xover -EDIT menu), which operates with 5 steps in a range of between 0 and 180 . In this way it's possible to set the phase of each individual output with 5 steps within a complete 360 revolution, a very useful function when assembling arrays of speaker enclosures, in the control of the interpolation between various enclosures or between sections of the same system. 5.3.7 Output Limiter a. Output level limiter Allows to keep the signal of each individual output within a set level. Can be used effectively to protect the components of a sound system. Ou t p u t L i m i t e r The following editable parameters are available: b. Reaction times Allows to choose between 3 types of Limiter reaction speed. In fact, these are attack and release times that are optimised so that the Limiter reacts more or less rapidly when the signal exceeds or drops below the threshold: Fast short times, suited to rapid Limiter operation. Normally more suited to outputs dedicated to high frequencies. Normal intermediate times, suited to the majority of applications. Normally more suited to outputs dedicated to mid frequencies or full-range systems. Slow long times, suited to avoiding rapid repeated level jumps (pump effect). Normally most suited to outputs dedicated to low frequencies. LI M I ER OP 1 T Fa s t o f f LIMITER ATTACK RELEASE FAST 1ms 10 ms NORMAL 8ms 80 ms SLOW 45 ms 450 ms c. Threshold Allow to set the level above which the Limiter intervenes (limiting the signal) and below which it leaves the signal unchanged. The editing values are within the following ranges: +19.8dBu ~ -10dBu, with 0.2dBu steps 7.574V ~ 0.245V with variable steps The measurement unit can be chosen with the Lim. Thresh. Unit function ( UTILITY menu -Units submenu). The...