Cobranet And Control Module Features - Crown CTS4200 Operation Manual

CTs Multi-Channel Power Amplifi ers
3 Operation
(continued)

3.2 CobraNet and Control Module Features

3.2.1 Data Indicator
An amber Data Indicator fl ashes whenever a command addressed
to the module is received. To assist with troubleshooting, an
option that forces the Data Indicator to remain lit is available
through the software. In addition, the locate feature in System
Architect will cause the Data Indicator to blink rapidly to help you
identify the unit. Another Data Indicator is on the amplifi er's front
panel, and it lights simultaneously with the module's Data
Indica tor.
3.2.2 Preset Indicator
A green Preset indicator signals the number of the current preset,
if active, by continually fl ashing a series of fl ashes equal to the
current preset number, followed by a pause. A preset is
consid ered "active" if the USP/CN settings match those in the
selected preset. If a change is made to any setting then the preset
is con sidered "inactive," and the indicator stops fl ashing.
3.2.3 CobraNet Network Connectors
The Primary and Secondary CobraNet RJ-45 connectors can
simultaneously interface to the 100 Mbps HiQnet network. While
the Primary CobraNet connector is the main connection to the
network, the Secondary connector is the "backup" or redundant
connection to the network. If the Primary connection fails due to
cut wire, failed network switch, etc., this port is automatically
enabled and ready to receive the network data within a few
sec onds.
Make connections with a standard CAT5 cable to a network switch
port. Crown strongly recommends the use of switches and not
hubs in the network. Hubs will limit the amount of CobraNet traffi c
and create unnecessary limitations in the network.
If the amplifi er is not connected to a network, the CobraNet
con nector can connect directly to a computer's network adapter
port using a crossover cable (TX and RX pairs swapped).
3.2.4 Link/Activity Indicator
The green Link/Activity indicator is provided on the network
con nector to display the status of the Ethernet connection.
Whenever the module is properly connected to another
functioning network port, the indicator lights. When the module
detects the presence of network traffi c, the indicator fl ashes. The
Link/Activity LED fl ashes for all network traffi c, while the Data
LED fl ashes only for commands addressed to this USP/CN.
Operation Manual
.3.2.5 CobraNet In-Use/Conductor Indicator
The indicator on the right side of each CobraNet RJ-45 connector
turns ON if the port is in-use (i.e. the link is being used to trans mit
or receive active CobraNet traffi c), and will blink if the device is
also the conductor (the timing reference).
3.2.6 Balanced Audio Inputs
Located on the amplifi er rear panel, these removable barrier-block
connectors allow line-level audio signals to be input to the USP/
CN. The amplifi er accepts line-level analog audio signals in
addition to the digital audio from the CobraNet network. This
analog audio can be used for one of three purposes:
• Backup of the CobraNet network audio: In the unlikely event of
a loss of CobraNet audio to the module, the module automati cally
switches over to the balanced audio inputs.
• Emergency override: If an audio signal appears at the analog
inputs, the module switches to that signal.
• CobraNet network audio inputs: The amplifi er can act as a
CobraNet audio input source by converting the balanced audio
input signal to CobraNet.
3.2.7 Aux Input/Output Connector
An RJ-11 connector provides three functions: AUX output, AUX
input and Foldback. The AUX output is a multifunctional control
output that delivers 15 VDC limited to 15 mA. It can be confi g ured
in two modes:
• Manual mode: The output is simply controlled with a
com mand from the software.
• Error reporting mode: The AUX out is active when the
mod ule detects an error. Each error source (Thermal, Clip, Load,
Amp Fault, and Line Voltage) can be individually enabled to
activate the AUX output when the error conditions are met.
An inversion control allows the AUX output functionally to be
inverted for the manual and error reporting modes. The inversion
control is ignored for fl ash preset mode.
The AUX input is a two-state input with a high state defi ned as
voltage between 4 and 15 VDC. The low state is defi ned as
volt ages between 0 and 1.6 VDC. It has a 10K input impedance.
The AUX input can be confi gured in several modes:
• None: In this mode the module makes no changes to its
operation. However, the AUX input status can be monitored
through the control software and used for functions within the
software.
• Mute All: This mutes the channels when the AUX input is
active. Likewise, the Power Off Both function disables both
channels during an active AUX input.
• AUX Input Inversion: This control allows the low state to
activate the selected function. Normally, the high state activates
the selected AUX input function.
The AUX port provides a power supply for the AUX input. This 15
VDC at 15 mA supply can be connected through a switch to the
AUX input. This allows a simple switch closure to operate the aux
input without the need of an external power supply. See Section
4.1 for details on using the AUX port.
3.2.8 Listen Bus or Foldback
The AUX port is also used for the Foldback connection. Two
pins of the connector provide a balanced line-level audio output
that can be selectively driven by either channel under System
Architect software control.
3.2.9 Preset/Reset Switch
The Preset/Reset switch is a recessed pushbutton located
between the Data and Preset indicators. It is activated by a
straightened paper clip or similar object. This switch can be used
to change presets, restore settings to factory default or restore all
the presets to the factory defaults. During operations of the
switch, the Data indicator fl ashes as an aid to the user.
To select a preset:
1. Remove all audio input signals.
2. With the amplifi er powered up, momentarily hold the preset
switch in for one fl ash of the Data indicator (less than 2 seconds)
and then release.
3. The amplifi er will load the next preset in the defi ned preset
range.
The range of presets is defi ned by the Maximum Preset and
Min imum Preset controls. Once the Maximum Preset is reached,
the next momentary depression of the switch will cycle the USP/
CN to the Minimum Preset.
4. The Preset indicator will fl ash the number of the selected pre set
followed by a pause.
5. Restore the audio input signals.
To restore the unit to factory default settings:
1. Remove all audio input signals.
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