Operating Manual -
10. BLOCK DIAGRAM | Distorted Sound |
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| CLIP |
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EQ |
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| 6dB/15dB |
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| INPUT |
| GAIN |
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| HPF |
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| 15 BAND EQ |
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| HPF In/Out |
| EQ In/Out |
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| EQ OUTPUT | ||
| CHAIN |
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1 3 | LIMITER |
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| INPUT |
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| CLIP |
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| INPUT/OUTPUT METERS |
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| + | GAIN |
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| VCA | 1 | ||
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| OUTPUT |
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| GAIN REDUCTION DISPLAY |
| LEVEL |
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| RATIO |
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| LIMITER | |
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| LIMITER | ||
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| DETECTOR |
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| ATTACK |
| IN/OUT |
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| CIRCUIT | TH |
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| RELEASE |
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| INSERT | |||
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| THRESHOLD |
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This will only be caused by too much signal which will show on the Clip LED. If the LED is not flashing, there is an overload some- where else in the signal path. Adjust the rela- tive gain of each component in your chain to keep everything at a comfortable level.
Excessive Hum or Noise
Hum will usually be caused by a ground loop between components. Try using the sug- gested balanced input and output
Noise (excessive hiss) can be caused by insufficient drive signal. Make sure you are send- ing a nominal 0 dBu line level signal to the equalizer. Most noise problems occur because gain is applied to audio signals too late in the chain. For best performance, apply gain to in- dividual source signals as early as possible, like at the mixer input preamp section. As gain in- creases, it also boosts the noise content of that signal. Any cumulative noise built up in a mixed signal will only be increased by using an equal- izer as a gain device, so make every attempt to operate the equalizer with as little gain as pos- sible.
11. Equalizer Troubleshooting Tips
No Audio Output
Check AC power - is the pilot light on? Check in/out connections - are they reversed? Are you sure you have an input signal?
EQ Controls Do Nothing
Is the master EQ switch in?
The lowest and highest frequency sliders may be beyond the range of the program material or speakers and may produce little or no audible effect.
Peak Light Flashes or Stays On All the Time
If the peak light flashes, the signal level to the equalizer is too high. Turn down the gain. If it is on all the time, disconnect the input and output cables. If it is still on, the unit must be returned for service.
Note: Unshielded cables, improperly wired con- nectors, and cables with broken strands of wire are very common problems. Use quality cables with quality, cor- rectly wired connectors.
11.1Compressor/Limiter Troubleshooting Tips
No Output
Check AC power. Is the power switch on? Check input and output connections - are they reversed? Are you sure you have an input signal?
Controls Have No Effect
Is the limiter in/out switch in? Perhaps the ratio control is set too low to produce an audible effect or the input level is below threshold. Is the threshold LED light- ing up? If not, lower the threshold setting or increase the gain. Do not expect to hear any effect when the input level is below threshold, since the unit is simply a linear amplifier at those levels.
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