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Operating Manual - NE Multi Channel Power Amplifier
The base amplifier comes with software provisions for an audio control surface, password protected security func-
tions, and network property management. Furthermore, Link Group Configuration and Power On Delay are set up under
the Device Options menu tab. In addition, provisions for implementing DSP modes, AES/EBU Inputs, and Cobranet
inputs are made available, presuming the necessary hardware has been installed in the amplifier. Protea
auto-detect the installed amplifier hardware options and display the resultant menu items as soon as it recognizes the
amp on the network.
Link Group Configuration - Linking allows the controls for multiple signal processing function "blocks" to track
each other. For example - if two graphic equalizers are "linked", any change made to a control within either of the
equalizers will result in an identical change to the other. Blocks may be linked within a Protea
multiple devices (assuming that devices are networked). Linking of multiple devices is managed through LINK GROUPS.
Each Protea
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device will support up to eight Link Groups. DSP function "blocks" may be assigned to these groups
though Protea
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Software. Once assigned to a group all LIKE functions within the group will track parameter changes.
However more than one function type may be assigned to a group. Each LINK GROUP may be assigned a name by the
user, and also be assigned a color for easy identification. For further details about linking, see the online help in Protea
Software.
Preset Options - The Preset Options tab in the main amplifier window allows amplifier setups to be saved to and
recalled from the amplifier as well as a computer. Presets are a snapshot of all current settings on a given amplifier.
Sub Presets - Sub Presets are user defined groups of DSP functions within one channel or across multiple chan-
nels. Sub Presets allow the end user to instantly recall a pre-determined set of DSP parameters to quickly address
changing environmental conditions, without the risk of making undesirable or irrecoverable system changes.
The Amplifier Control Surface Tab
This is the main user interface for the NE multichannel amplifier. Key features of this window include:
1) Channel/Offset Link Group Faders - The level control provides up to 40dB of analog input attenuation. More
than 40dB of cumulative attenuation causes the channel to mute. If a channel has been assigned to an offset link
group, a colored triangular marker appears on the left side of the fader graticule for secondary level control of
all channels in that group. The main level control faders can not be linked to a group.
2) Mute button - This mutes the input channel
3) Polarity button - This inverts the phase of the input channel
4) Offset link group - Up to eight groups are available for the purpose of linking similar function parameters
across multiple channels. In addition to the control surface secondary level control (not the main fader), most
DSP functions have a link group check box in their work window to assign a specific parameter to one of the
eight link groups if desired. Link groups can be renamed by clicking on any group name and entering the new
name then pressing <enter> on the keyboard.
5) Attenuators - These two dials indicate the physical position of hardware controls on either the amp front panel
or the remote level control (if present). Note that these will display the position of attenuators even when
DISABLED in software.
6) Total Attenuation - This indicates the total amount of attenuation being applied to the channel. This is the sum
of the following attenuators: main fader, offset link group attenuation, front panel and remote attenuators (if
enabled).
7) Meters - Input and Output meters display the real time activity per channel, in dB below rated output. Also, the
amplifier's operating temperature and output current are shown. Output current shows that the amplifier
channel is actually delivering output to a connected speaker load.
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