Page 2
CobraCAD, CobraNet, and Peak Audio are trademarks of Cirrus Logic, Inc. Ethernet is a trademark of Xerox Corporation. Windows is a registered trademark of Microsoft Corpora- tion. Yamaha is a trademark of Yamaha Corporation. All other trademarks are the property of their respective holders and are hereby acknowledged.
CobraNet’s Serial Bridge feature allows serial data to be transmitted over the network. Nor- mally, the ACU16-C and NHB32-C use the Serial Bridge to transmit amp control data. How- ever, it can be used to transmit MIDI (Program/Control Change) or AD824 head-amp control data between any two NHB32-Cs on the network.
Each cycle starts with a beat packet, which is used for synchronization. The last packet in the cycle can be used to transmit asynchronous serial data. The ACU16-C and NHB32-C use this for power amp control, MIDI, and AD824 head-amp control.
The network conductor The conductor device is chosen automatically and no user intervention is required. The ACU16-C and NHB32-C have front-panel indicators to show when they are working as the conductor. If the conductor fails, another device automatically takes over.
ACU16-C The ACU16-C and NHB32-C support all multicast bundle numbers and unicast bundle numbers 256 through 16, 383. NHB32-C ACU16-C ACU16-C Bundle numbers are assigned in NetworkAmp Manager. Set to receive bundle #256 Unicast bundles CobraNet, ACU16-C & NHB32-C Guide...
128 channels per connection, as opposed to the 64 channels net- work-wide supported by repeater networks. Straight cables (wired pin-to-pin) should be used to connect the ACU16-C, NHB32-C, and other network devices to a switch. NHB32-C...
You can arrange devices onscreen, wire them up, and test. CobraCAD includes most CobraNet-compatible devices, including the ACU16-C and NHB32-C. CobraCAD runs on Windows computers and can be down- loaded for free at: http://www.peakaudio.com/CobraNet/cobracad/...
Page 10
#256 and #257 to distribute 16 audio channels from an NHB32-C to an ACU16-C, which is feeding eight 2-channel power amps. Since there are no hubs on the net- work, a crossed Ethernet cable is used to connect the ACU16-C and NHB32-C.
Page 11
16 2-channel power amps. Straight Ethernet cables are used to connect the devices to the switch. Pink lines indicate bundle assignments Blue lines are straight Ethernet cables CobraCAD example #2 Here are the test results for example #2. The test results for example #2 CobraNet, ACU16-C & NHB32-C Guide...
• CobraNet supported by professional audio manufacturers world- wide • Serial Bridge feature allows power amp control, MIDI, and AD824 head-amp control via the network • ACU16-C and NHB32-C can be used with CobraNet-compatible audio equipment from other manufacturers CobraNet, ACU16-C & NHB32-C Guide...
’ NHB32-C Network Hub and Bridge The Yamaha NHB32-C Network Hub & Bridge is a bridging device for interfacing digital audio equipment with AES/EBU format I/O to a CobraNet network. It offers flexible patching of 32 AES/EBU inputs and 32 AES/EBU outputs.
NetworkAmp Manager • Patches can be recalled directly from the front panel when Net- workAmp Manager is offline • Works as an interface for Yamaha’s NetworkAmp Manager soft- ware • NetworkAmp Manager PC can be connected via USB or RS-232C •...
The Yamaha ACU16-C Amp Control Unit is a CobraNet interface offering 24-bit D/A conver- sion of up to 16 CobraNet audio channels, which are output via Euro-block connectors. Up to 32 PC-N series power amplifiers can be connected and controlled via a single ACU16-C. UNIT ID setting...
• NetworkAmp Manager PC can be connected via USB or RS-232C As of this writing, the Yamaha PC9500N and PC4800N power amplifiers can be networked with the ACU16-C. Please check the Yamaha Professional Audio Web site at the following URL for news and information on other Yamaha professional audio products: http://www.yamaha.co.jp/product/proaudio/homeenglish/...
• Remote control software for PC-N series power amplifiers, ACU16-C, and NHB32-C • Runs on standard Windows PCs • PC can be connected to any ACU16-C or NHB32-C on the network • USB or RS-232C connection • Records log file of operations and warnings (e.g., output shorts, overheating) for troubleshooting analysis after a performance (see “Log File”...
Page 18
• Output level (12-segment meter, watt/volt) • Mute (on/off) • Output clip (output clipping indicator) • Impedance (indicates current load impedance, short/open) • Protection (protection system status) • Temperature (heatsink temperature, 12-segment meter, centigrade/Fahrenheit) NetworkAmp Manager’s power amp control page CobraNet, ACU16-C & NHB32-C Guide...
(NHB32-C/ACU16-C) bundle numbers and use the patchbays to select individual audio channels from any of those bundles. For example, you may configure an ACU16-C to receive four bundles and then select four audio channels from each bundle, or any combination up to a total of 16 channels.
OM & MIDI Modes CobraNet’s Serial Bridge feature allows serial data to be transmitted over the network. Normally, the ACU16-C and NHB32-C use the Serial Bridge for power amp control. However, it can be used to transmit MIDI (Program/Control Change) or AD824 head-amp control data between any two NHB32-Cs on the network.
The Warning Log window showing Warning events Online/Offline Status: This type of event occurs when a power amplifier, ACU16-C, or NHB32-C comes online (i.e., when a new device is detected on the network) or goes offline. Power Switch: This type of event occurs when a power amp is set to On or Standby.
ACU16-C Power Amp System System Examples ACU16-C Power Amp System This example shows how Yamaha PC-N series power amplifiers can be connected to an ACU16-C for remote control and monitoring via NetworkAmp Manager. USB port ACU16-C USB port RS-485 port...
ACU16-C/NHB32-C CobraNet Audio Distribution System System Examples ACU16-C/NHB32-C Cobra- Net Audio Distribution System This example shows how multiple AES/EBU channels can be distributed over long distances (up to 200 meters with 100Base-TX Ethernet cabling) to multiple power amplifiers. The NHB32-Cs handle AES/EBU to CobraNet conversion, while the ACU16-Cs handle CobraNet to analog conversion.
MIDI Program/Control Change messages from one NHB32-C to another via Cobra- Net’s Serial Bridge feature. In this example, MIDI data from a Yamaha DME32 Digital Mixing Engine is fed through to a Yamaha DM2000 Digital Production Console. While MIDI mode is active, power amp and AD824 head-amp control are not possible.
Net’s Serial Bridge feature. In this example, head-amp control information is transmitted from a Yamaha DME32 Digital Mixing Engine, or Yamaha DM2000 Digital Production Con- sole to a remote AD824 A/D Converter. While COM mode is active, power amp and MIDI transmission are not possible.
If a primary cable or switch fails, the system automatically switches to the secondary network. NHB32-C NHB32-C Primary CobraNet Ethernet switch A Ethernet switch B Secondary CobraNet ACU16-C ACU16-C A system with redundant cabling and switches CobraNet, ACU16-C & NHB32-C Guide...
Further Informa- A glossary of CobraNet, ACU16-C, NHB32-C, and NetworkAmp Manager related terms is provided on page 29. A wealth of information about CobraNet, with sections especially for designers and installers, is available on the Peak Audio Web site at http://www.peakaudio.com.
CobraNet network designs. The latest version not synchronized by a common clock, in which data includes the ACU16-C and NHB32-C. is sent intermittently rather than in a steady stream. CobraNet: CobraNet’s Serial Bridge is asynchronous. Contrast Developed by Peak Audio, CobraNet with Isochronous.
Page 30
1,000 Mbps. CobraNet supports Gigabit Performer: Ethernet. A Gigabit switched network can handle up The devices on a CobraNet network to 1,028 CobraNet audio channels. that are wordclock slaves. Performers synchronize to the conductor. See also Conductor. CobraNet, ACU16-C & NHB32-C Guide...
Page 31
If the wiring is identical, it’s a straight cable. If it’s dif- ferent, it’s a crossover cable. Contrast with Crossover Ethernet cable. STP (Shielded Twisted Pair): A cable consisting of two shielded conductors that are twisted together. CobraNet, ACU16-C & NHB32-C Guide...
Need help?
Do you have a question about the ACU16-C and is the answer not in the manual?
Questions and answers