User manual BELL AUDIO PA-8022 X DATASHEET

[. . . ] 0 Command switch (with led indicator) Switches at any time from , , Command"- to , , View Mode" and reverse. , , Command Mode on" is indicated by an addition green led indicator. When leaving , , Command Mode" any manipulation of parameters will automatically be safed, even when , Enter` was not operated. : functions of , , Command"- und , , View Mode" Page/Exit button Jumps to the next page ( in , , Command"- and , , View Mode") Any manipulation of data will automatically be safed without operating , Enter` button. [. . . ] Enter In Command Mode pressing , Enter` will jump from parameter to parameter. Press enter for each new digit to be stored. These entries may be numeric or confirmations such as YES / NO , ON / OFF or ENABLE / DISABLE. SIGNAL LED Indicates , signal present at amplifier output socket` Normally, only the , gren` led indicators will be on. lIMIT LED Indicates that the built-in limiters are active. When this indication is permanent, please reduce the input level (= the output level of the connected mixer) to avoid heavy compression of the audio signal. pROTECT LED Indicates a defect or a state of overheat. When the temperature of the power amplifiers exceeds 90°C, Protect will be active. After cooling down to below 80°C, Protect will be inactivated. [View Mode, Page 1] The physical cause of Protect must be found and eliminated. protect Mode will disconnect the speaker outputs via relais. Parameters: Remote address: Remote Control address of any individual power amplifier. Data communication between all linked power amplifiers and the external controller via RS485 port. In order to communicate with any specific power amplifier, the controller must have its exact address. Each power amplifier must have different address. This preselected value will be kept by the system as long as no communication between the external Controller and the SCA-2/4MR has instructed otherwise. It makes use of an onboard digital sine wave generator with frequency sweep. Power output as well as the sweep range (frequency window with start and stop entry) are selected by the user. Selected values are also used to execute the automatic impedance control (right after mains switch , on`) if this function has been activated under [Command Mode , Page 4] More information in`Funcions and features guideline p. 3 Within the selected frequency range and output power , the system will check the total impedance of loudspeakers and cables connected to the speaker outputs. The frequency sweep within the selected range will be audible through the connected speaker system(s). --> Beware of excessive audible output levels The test result will be shown in the display for a period of 5sec. [. . . ] Unlike in the automatic impedance control mode, any state of low impedance or short circuit will not switch the power amplifier into , stand by mode`. The output power of the sine wave signal will however be reduced to 4W max. In order to minimize any possible dangers for the power amplifiers. Following this test is a soft , , Fade In" of the input signal. [. . . ]