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Содержание Compex F760X-RS

Страница 1: ...By Compex F760X RS ...

Страница 2: ... 2 Audio Pin 3 0V Audio If problems such as hum etc are encountered there are a couple of possible routes to eliminating this 1 lift shield at Pin 1 of input audio wiring This is easiest to accomplish in the XLR connector on the end of your wiring If that does not fix the problem lifting pin 3 at the input may be the next choice This same sequence can be followed on the output XLR Interfacing unba...

Страница 3: ...mpressor Ratio control select the Slope required e g 2 1 and adjust the Compressor Threshold control until the Peak Limit only indicates on peaks above the amount of compression required i e move the threshold down from 0 towards the 20 point until the Limit light goes out then come back one position The limit section will then oper ate on any further unexpected increase in level The amount of com...

Страница 4: ...Slope required e g 2 1 and adjust the Compressor Threshold control until the Peak Limit only indicates on peaks above the amount of compression required i e move the threshold down from 0 towards the 20 point until the Limit light goes out then come back one position The limit section will then oper ate on any further unexpected increase in level The amount of compression may be changed by increas...

Страница 5: ...ed signal may now begin to be expanded release and attack may need adjustment to avoid modulation effects The alternative is to use the GATE position n Having established the Expander mode satisfactorily switch it out re establish the compression section by selecting the ratio and increasing the input attenuator to give compression required Then switch the Expand mode to In Make any final fine adj...

Страница 6: ...udness The faster the release and the tighter the slope the more lower level signal is brought up toward peak level The problem introduced is that of pumping or breathing plus the effect of fast release times on low frequency distortion With very fast release the low frequency wave forms are being flattened this is naturally most noticeable under conditions of considerable gain reduction coupled w...

Страница 7: ... the lower level signal is being expanded but there is then the danger of modulation effects and hunting unless slower release attenuate rate times are used This does rather defeat the idea of getting rid of the noise fast before the ear can detect it it does have its uses however where the noise is so poor that it actually merges with the wanted signal In such a case as with an older orchestral r...

Страница 8: ...tion has the Expander Gate Side chain with associated Indicator switching circuit GREEN With the FET Bias pre set correctly adjusted and with the Input Output attenuators fully open the overall gain of the sys tem will be 34dB transformerless 30dB variloss amp 4dB Line drive amp this 4dB is lost in a pad when in the direct signal bypass mode to maintain unit gain Normal maintenance would consist o...

Страница 9: ...t adjust the inverter pre set full CW to give maximum output about 4dBu output system gain of 38dB Adjust the inverter pre set CCW so level is attenuated by about 1dB down to 3dB then adjust the FET bias to further attenuate the output by 3dB Output should be 0dBu system gain of 34dB 4 Select compressor ratio of 2 1 and threshold to 20 this is referenced to the internal peak limit threshold Using ...

Страница 10: ... range pre set on the C board unit a reading of 16dB is achieved then proceed to the next step to adjust for stereo linking Check that both channels are reading 16dB then select the stereo in mode on the stereo link switch and ob serve and change of position in meter readings If movement occurs switch out the stereo link and adjust the one moving towards 0 with the FET LAW preset on the C board so...

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