Bosch IRIS-Net User Manual page 109

IRIS-Net
The LIMIT indicator lights as soon as the internal dynamic limiter is activated, which is the case
when the amplifier is operated at maximum out- put. Short-term blinking is not a problem, since the
internal limiter controls input levels of up to +20dBu down to a distortion rate of approximately 1%.
However, if this indicator lights permanently, reducing the output level is strongly recommended to
protect the connected loudspeaker systems from being damaged by capacity overload.
The Input Level Meters provide indication of the corresponding audio levels at the amplifier inputs
in dBu. The amplifier's nominal input level is
+6dBu, the maximum level can be as high as +21dBu. In general, it is recommended that the
amplifier be operated in a range between 0 and
+10dBu. Only signal peaks should be at higher levels.
The level controls are for adjusting the overall amplification of the corresponding amplifier channel.
Setting the level controls to a value between 0dB and -6dB provides full output capacity. The
numerical field below the level controls indicates the set level, by which the output amplification is
attenuated, in dB.
The Output Level Meters provide indication of the corresponding audio levels at the amplifier
outputs. Indication in dB is relative to amplifier full-modulation. A 0dB output level (full-modulation)
is indicated in yellow.
The MUTE button is for attenuating the output level of the corresponding amplifier output to -∞.
Clicking the MUTE button with the left mouse button mutes the corresponding amplifier output. The
MUTE button is virtually pressed and lights red. Clicking the MUTE button once again with the left
mouse button disables the mute-function and the amplifier output is again active. The MUTE button
is virtually disengaged and not lit.
Clicking this switch activates the STATUS indicator on the amplifier's rear panel as well as in the
amplifier's front panel window in the IRIS-Net software. Normally, the STATUS indicator blinks only
during serial communication. Once the STATUS switch is engaged, the STATUS indicator blinks in a
steady but fast sequence. This function is meant for checking communication and for identifying or
searching an amplifier in a large system setup.
The address field indicates the set amplifier address. Assigning a new address is also possible by
clicking into the field with the left mouse but- ton and entering the desired amplifier address.
Available values are 1 to 250. Press Return on the computer keyboard to acknowledge your entry.
The assigned address and the address specified by the setting of the selection switch on the
amplifier's rear panel have to be identical. Each address can exist only once within a system.
Bosch Security Systems B.V. User Manual
REMOTE AMPLIFIER | en
2017.05 | 3.20 | F.01U.119.956
109