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Amplifier and DSP
Input Stage:
The female XLR connector (10. Audio, input –
Figure 2
) allows to send an outside signal
straight to the input of the DSP by-passing the inside noise generator. The input is
possible only when the noise generator is off (button 4. turned up – Figure 2).
The male XLR connector (11. Audio, link –
Figure 2
) allows to make the
talk through
of this
signal to another device.
The yellow (“On”) and green (“Signal”) leds indicate respectively the ON status and the
presence of the DSP input signal (whether it comes from the inside generator or from
outside).
The red led indicates one of the following possible status:
saturation of the DSP input AD converter
intervention of the DSP peak limiter
intervention of the “RMS” limiter on the output of the amplifier
amplifier
clip
It is possible to better detect which of these particular events is occurring by monitoring the
DSP via PC remote control. To that end please refer to the paragraph “DSP Remote
Control– Software” and to the Help on-line of the PS-NET Network Controller software.
Figure 5: JADSP1250 General Scheme
Switch for DSP Control:
The DSP on board is supplied with presets straight switchable from the hardware panel. A
main switch named “PRESETS” allows to switch the correct audio sets-up for:
1) JA12
dodecahedron (with or without the JASW12 subwoofer dedicated) – PRESET
named
JA12
2) JA401
2
speaker for front insulation measurements
–
PRESET named
JA40
