Nexo NX242 Manuel D'utilisation page 26

26
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The NX242 will display the following messages:
Displayed Message...
Read gain: 26.0dB
No Reading yet..
You will also be warned of any setup problems with LED alerts (see MENU 2.8).
This read gain value is intended to help you to check the actual measured gain of your amplifier. The
user gain and the read gain should be the same.
IMPORTANT: Bear in mind that any changes made in the MENU are only saved when the NX242
returns to its default screen showing the current cabinet family, or when a setup is saved in
MENU 1.5 (gain & power settings are common to all presets). Do not turn off your NX242 before
saving the amplifier settings.
NB:
Even when not in use, do not leave sense inputs floating; connect them to an amplifier output or
short circuit the sense input to avoid cross-talk or interference in the sense circuitry. Otherwise,
false error messages could result.
The gain value is not modified even if the amplifier has reached its clip point. In the case of
continuous clipping of the amplifier output, the NX242 will display the wrong gain value of
(because the amplifier is no longer working linearly anymore). Some amplifiers reduce their
output gain when overloaded. This may be seen on the NX242's computed gain.
If the Input LED or the DSP LED are lit, the computed value of the gain may be false. Please
increase the Headroom value in Menu 1.1 .
IMPORTANT: NEVER insert digital equipment or any kind of signal processing (delay lines, digital
EQ, amplifier DSP modules...) between the output of the NX242 and the input of the loudspeaker
cabinet. This is because any alteration to the signals may interfere with the sensing & protection
algorithms.
Menu 2.7 Amp Power
This menu will help you to enter the amplifier power value into your NX242. This power value will be used
to determine the threshold of the peak limiters.
The first line of the menu displays the amp power entered by the user in the NX242. The second line
displays the value the NX242 has found by scanning the highest peak value reached during amplifier
clipping.
To properly set the user amp power value, please follow the following steps:
NX242 USER MANUAL LOAD2_22
DATE : 12/3/2004
AMPLIFIERS (GAIN, POWER)
Means...
The last measured gain value.
The average of the output signal is too low (< 28dBV)
to compute the amp gain.