Ashly Protea 4.8SP Betriebshandbuch - Seite 14

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Operating Manual - PROTEA 4.8SP and 3.6SP System Processors

7. TROUBLESHOOTING

7.1 - Audio Troubleshooting Tips

No power - Is the detachable AC cord fully plugged in? Is the rear panel power switch on?

Controls don't work - check the Security Level. If set to Full Lockout, then Protea unit is "view only". Change

security settings in Util menu or software.

No sound - Check to see if the input or output is muted. Is the input or output Gain turned down? Check the

selected audio source(s) for each output, making sure there is signal applied to the designated input(s). If the crossover

is used, make sure the high pass filter (HPF) is set to a lower frequency than the low pass filter (LPF).

Clip light stays on - Is the input signal level too high? Check to see that the nominal input level is 0dBu, allowing

20dB of input headroom. Are input or output gain settings too high? Check to see if an EQ filter has too much boost.

Distorted sound but no Clip LED- Check individual EQ filters to see if there is excessive boost.

Muffled sound - If expecting full range audio on an output, make sure the crossover settings are not inadvertently

set so as to limit the pass band.

Excessive Noise - An input signal level or an input gain setting that is too low could require the loss to be made

up for at the output gain stage, producing more noise than a properly set up gain structure. Do not use the DSP processor

section for dramatic increases in level, but rather optimize the signal source for a nominal 0dBu output.

Forgot the password - See section 4.7e

8. SPECIFICATIONS

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Active Balanced, 18KΩ

Max. Input Level . . . . . . . . . . . . . . . . . . . . +20dBu

Input Gain Range . . . . . . . . . . . . . . . . . . . -40dB to +12dB

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . Active Balanced, 112Ω

Max. Output Level . . . . . . . . . . . . . . . . . . +20dBu

Output Gain Range . . . . . . . . . . . . . . . . . . -40dB to +12dB

EQ Filter Types . . . . . . . . . . . . . . . . . . . . . 1st or 2nd Order High or Low Shelf, Parametric

Shelving Filter Boost/Cut Range . . . . . . ±15dB

Shelving Filter Frequency Range . . . . . . Low Shelf 19.7Hz to 2kHz, High Shelf 3.8kHz to 21.9kHz

Parametric Filter Boost/Cut Range . . . . +15dB/-30dB

Parametric Filter Frequency Range . . . 19.7Hz to 21.9kHz, 1/24 Octave Steps

Parametric Filter Bandwidth . . . . . . . . . Four Octaves to 1/64 Octave

Input and Output Delay . . . . . . . . . . . . . . 0-682 milliseconds

Crossover

HPF and LPF Frequency Range . . . . . . . 19.7Hz to 21.9kHz, Off

Available Filter Types . . . . . . . . . . . . . . . 12dB/Oct Butterworth, 12dB/Oct Bessel, 12dB/Oct Linkwitz-Riley

18dB/Oct Bessel, 18dB/Oct Linkwitz-Riley

24dB/Oct Butterworth, 24dB/Oct Bessel, 24dB/Oct Linkwitz-Riley

48dB/Oct Butterworth, 48dB/Oct Bessel, 48dB/Oct Linkwitz-Riley