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
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
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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