User manual ELECTRO-VOICE 524A DATASHEET
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Manual abstract: user guide ELECTRO-VOICE 524ADATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. Unplug this apparatus during lightning storms or when unused for a long period of time. [. . . ] CONFIG/DISPLAY SETUP/LCD Time to Dim: The currently set time interval, during which the display lights with the maximum brightness it has been set to, is indicated. Pressing the ENTER button opens the Set LCD Time to Dim dialog box, where the user can specify the duration after which the display dimming starts by pressing the Up/Down buttons. Alternately, the user can select Autodim off to completely deactivate the dimming function, which results in the display always lighting at the set maximum brightness level (Brightn. Pressing the ENTER button opens the Set Temperature Unit dialog box, which allows selecting °C (Degrees Celsius) or °F (Degrees Fahrenheit) by pressing the Up/Down buttons. Pressing the ENTER button stores the selected unit in memory and the CONFIG menu reappears on the display. CONFIG/SERVICE/Restore Amplifier's Factory Settings: The power amplifier can be reset to factory settings. Pressing the ENTER button opens a safety dialog box that lets the user choose between YES or NO by pressing the Up/Down buttons. If YES has been selected, pressing the ENTER button resets the power amplifier to its factory settings. If the user selected NO, all power amp parameters stay unchanged and the display returns to the CONFIG. The following table lists all parameters that are affected by a reset: Parameter Power-On-Delay Breaker Current (depends on the supply voltage) Amplifier Name Value 0. CONFIG/SERVICE/Lifetime: This menu item shows the total running time of the power amplifier (not counting standby times). Whenever the PROTECT-LED lights yellow, one of the internal protections has been activated. However, a lit PROTECT-LED does not necessarily mean that the signal path gets switched off. The differentiated protections concept of TOUR GRADE SERIES power amps results in several protection circuits being activated one after another, which ensures that under normal circumstances the power amplifier will stay in the safe and stabile operating range. In case the amplifier needs to be switched off to prevent power amplifier and connected speaker systems from being damaged, this is indicated by the PROTECT and MUTE-LEDs being lit simultaneously. The MUTE-LED lights red whenever the power amp's output signal is being muted, which happens for example during power-on delay of the speaker systems, when switching the input sensitivity, and when manually muting the output signal via IRIS-NetTM. Level indication is realized via two vertical LED chains on the power amp's front panel that individually indicate the actual levels of each channel at -30dB, -20dB, -10dB below full modulation and 0dB as soon as full modulation is reached. 0 dB indication results from comparing the power amp's internal ratio of input to output voltage, which ensures precise indication of the full modulation limit, even before limiting becomes audible. If the input audio signal is driven above the 0 dB mark, a clipping limiter reliably controls distortion down to a stable rate of 1 %. The red LIMIT-LED has a dynamic brightness control that makes it easy to perceive the degree of limiting applied to the signal. If the POWER-LED does not light, despite the fact that the amplifier has been switched on, this indicates that the power amp is not connected to the mains, the primary fuse has blown, or the amplifier is in standby mode (the STANDBY-LED lights yellow). The POWER-LED blinks whenever the voltage at the MAINS IN is too high (overvoltage) or too low (undervoltage), which prevents that the power amplifier can be switched on. [. . . ] Because of the superposition of the reflection with the original signal, the original signal is blurred. In order to prevent or minimize reflections at the bus ends, terminators are used as they "absorb" the energy of the signal. Since the CAN interfaces of all EVI Audio appliances are galvanically separated from the rest of the circuitry, network cabling also carries a common ground conductor (CAN_GND) ensuring that all CANinterfaces in the network are connected to a common ground potential. 10: Bus Topology of the CAN bus By using a CAN bus repeater a connection between two independent and self-contained CAN bus systems can be created. [. . . ]
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