Nexo NXAMP - Manuel (Page 27)

ENGLISH
PAGE
27
AMPLIFIERS (GAIN, POWER)
1. Unplug all loudspeaker cabinets in the system.
2. Set the NX242 on the [4 S2 cabinets S2-80 Hz] setup.
3. Ensure that the amp volume controls are set to maximum (i.e. no attenuation).
4. Ensure that the menu 2.7 user value is put to 5000W (so the peak limiting will not interfere with
the measurement)
5. Feed Pink noise into the system until the amplifier is consistently clipping.
6. Read the value from the display and enter it in the user value.
The Amp power reading is a real time process and will also display a measurement while operating the
system on real conditions. However the result may slightly vary according to the setup, the frequency of
clipping, interactions with protections.
Menu 2.8 Sense Alerts & reset
In addition to the Amp Gain display in MENU 2.6 LED visual
alerts will be triggered if user gain and read gain are not the
same. Note that there are no visual alerts on the POWER
computations in MENU 2.7 “Amp power”.
Flashing Mode… Means…
The measured gain value is under user gain
(and thus the system is over-protected)
The measured gain value is above the user gain
(and thus the system is under-protected)
Small differences are allowed, i.e. there will be no alert if the measured gain is more or less than 1 dB of
what the user has entered.
The first section of Menu 2.8 allows you to reset the gain and power reading to default settings. If the
enter WXbutton is pressed, the values are reset, and menu 2.6 is displayed again. Use this feature if any
physical changes have occurred in your system to start again the measurement process.
Turn the encoder wheel to reach the second section of Menu 2.8, which is the alert disable menu. Press
the enter WX button to set the alerts (Led flashing) on or off. Once disabled, the LEDs will not flash if gain
settings are incorrect. This parameter is saved every time the NX242 returns to the default screen, or
when a setup is saved in the menu 1.5.
USER MANUAL LOAD2_22
DATE: 03/12/2004