Oberheim GM-400, Руководство по эксплуатации

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Oberheim GM 400
Digital Signal Processor
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disconnect the power supply if the instrument is to be out of use for a long period.
3.2 SOME ADVICE ABOUT CORRECT USE OF THE GM 400
Switch-on.
Before making all the connections make sure that the amplification system volume is turned
down to the minimum setting. Switch on the GM 400 and then adjust the system volume
again. Otherwise, always switch on the GM 400 first and then the amplification system.
Input level.
Each instrument has its own output level which may vary depending on circumstances. In
order to obtain the best performance from the GM 400, the input level must be adjusted to suit
the instrument connected. This simple procedure will ensure that the right amount of signal is
sent to the effects processor in order to avoid distortion if the signal is too strong or hissing if
the signal is too weak.
Start the operation by turning the input trimmer to zero and pressing the Exit key while the
display is showing the main menu page:
the display will show:
At this point, send the signal to the GM 400 and start to turn the Input trimmer clockwise until
the signal brings the following onto the display.
optimum range
-24 dB -18dB -12dB -6 dB -3 dB 0 dB
At this point, reduce the input volume until >>ovl<< (the abbreviation of overload, indicating
an input circuit overload) no longer appears on the display. The illustration shows the