! " # !! # $ ( ! % ! & $ ' ) * " ! % ! + * , - $. + / 1' . 1 . $ + 0 $ + $ 1 . * $ 2 3)4',* 2 * $ , + 0 5 ) 6 ) 6 (7 7 $.
1 ' )83 8) )83 & 5 CAUTION! The CAB 4n series of products are Ethernet (CobraNet™) network products designed to operate on a network backbone or infrastructure. The design, implementation and maintenance of this infrastructure is critical to the operation and performance of the CAB 4n Series products. Peavey Electronics does not support nor service network cabling, hubs, switches, patch bays, wall plates, connector panels or any other type of network interconnect device.
1 ' )83 8) )83 & 5 Thank You! Thank you for purchasing the CAB 4n CobraNet Audio Bridge. This product is designed to provide years of trouble-free operation, and high quality audio performance. We sincerely hope that you enjoy your new CAB 4n, and will find other products in the MediaMatrix product line to supplement your new CobraNet Audio Bridge. We are confident that you will find the CAB 4n, as well as other MediaMatrix products to be of the highest quality available.
1 ' )83 8) )83 & 5 Features • Scalable I/O Architecture • Supports all MediaMatrix 4-channel I/O cards • 8x8, 16x0, 0x16, 12x4 or 4x12 I/O configurations • Supports short-loading • RS-485 connection for Serial Bridging • Integrated CobraNet Serial Bridging • Configurable GPIO • Optional DIN rail package for external control terminations • Fan cooled 2U package with new NION cosmetics • Front panel audio metering • Front panel network status and fault indicators • Word clock sync option supports Media
1 ' )83 8) )83 & 5 Audio Input and Output Modules The CAB 4n includes functionality that supports modular input and output architecture. This architecture provides the ability to configure the CAB 4n inputs and outputs for a variety of functions. Four internal 4-channel modular bays provide connection to factory installed input/output modules. A combination total of four modules can be installed at the factory on the CAB 4n.
1 ' )83 8) )83 & 5 Gain Structure Gain structure is among the most important, often debated and misunderstood topics in the audio industry. For years, engineers have disagreed with each other about proper levels, gain I/O, meters and other issues that affect the way we work. When digital audio came into the mainstream, the topic’s confusion was only compounded, and today, few fully understand the inner workings of gain structure. This is true within MediaMatrix® as well.
1 ' )83 8) )83 & 5 selected, then it will take +18 dBu of level to get to a 0 dB reading (full-scale A/D) on the front panel input meter. The setting in the Full-Scale Input Sensitivity dialog box will determine how the front panel input meters display audio levels coming into the CAB 4n. It is very important that these switches be set correctly.
1 ' )83 8) )83 & 5 This +23.0 dBu level represents 0 dB on the front panel meters. Remember, the +23.0 dB DPU level is always the maximum fullscale level that can be received by, or sent to the CAB 4n. Anything above +23.0 dB (DPU level) that is sent to the CAB output block, and thus, to the CAB’s D/A will be clipped. The additional 12 dB of headroom is only available within the DPU. What about the outputs? The outputs are easy....just set the drive level you want.
1 ' )83 8) )83 & 5 Installation: The CAB 4n product is designed to mount in a standard EIA electronic equipment rack. Because the CAB 4n includes forced air cooling, adding rack mounted vent panels is not required for most installations. However, it is recommended that common sense be applied to large installations where multiple units are mounted in a single rack. It is generally accepted that a ratio of 2:1 is a good rule of thumb that usually provides adequate performance.
1 ' )83 8) )83 & 5 Hardware vs. Software Devices: The CAB 4n is an integration of physical hardware and software. Within CobraNet™, there are even further integrations, that being the network itself, and the actual piece of equipment, in this case, the CAB 4n. In software, the equipment is represented by a “Device” within the MediaMatrix NWare application. The CobraNet network is represented by a traditional MediaMatrix wiring block with inputs and outputs.
1 ' )83 8) )83 & 5 Hardware vs. Software Devices continued: The second half of this equation, as mentioned above, is the audio transport. This transport is the CobraNet network that carries audio from one location to another. In the past, and if you are familiar with MWare, this was represented by a block with “wire nodes” on it that represent the actual input and output points for the system.
1 ' )83 8) )83 & 5
1 ' )83 8) )83 & 5 CAB 4n Software Device Features: LINK LED This LED will turn ON when a valid connection has been established between the CAB 4n and the network switch. This function is duplicated on the front panel of the CAB 4n. ID The four digit number is the user-defined Hardware Base Address. The range is hex, between 0000 and FFFF. The LED will turn ON when a valid number is entered. Each CAB 4n on the network must have a unique ID.
1 ' )83 8) )83 & 5 #
1 ' )83 8) )83 & 5 1. HARDWARE BASE ADDRESS SWITCHES 4-position rotary switches for setting the hardware base address (ID). Located behind removable front panel for tamperproof settings. 2. FAULT LED Illumination of the Fault indicator indicates detection of an unexpected condition within the CobraNet interface. Some fault conditions will also light the RX Error and/or TX Error indicators to give more specific indication if the unexpected condition is in the receive or transmit processes.
1 ' )83 8) )83 & 5 Basic CobraNet Network Connections The CAB 4n product feature 4 different connection types. (Refer to the Rear Panel Details.) First in priority is the CobraNet™ network port. This RJ-45 connector is designed to connect with standard, off-the-shelf Category 5 (CAT 5) cable for use with standard Ethernet network switches. This cabling interconnect is commonly referred to as the wiring “backbone”. This backbone must be properly designed for each system.
1 ' )83 8) )83 & 5 Basic CobraNet Network Connections continued Alternately, you can connect the CAB 4n CobraNet port directly to the CobraNet port on your MM-DSP-cn card or Nion, bypassing the need for a switch. However, this type of direct connection requires a "crossover" cable. (See p.18 to 19 for CAT 5 cable details.) It should be emphasized that with this direct connection method, you cannot connect more than a single CAB product to an MMDSP-cn card or Nion CM-1 card.
1 ' )83 8) )83 & 5 Audio Connections The second connection is audio input or output. Each audio connection on the CAB 4n is a single three-wire, balanced analog circuit. The connections are identical for both microphone and line input plus line output cards. When using an AEC card make sure there is at least one line output card loaded in the CAB 4n for signal reference purposes. As with any electronic connection, care should be taken to ensure that the termination is solid.
1 ' )83 8) )83 & 5 CAT 5 cable is your friend.... Well, you’ve been in the audio business for a while now....you know all about audio connections, balanced cables, multi-pairs, SJO, TRS this and XLR that....you can dress off a wiring harness like nobody’s business....then, the industry throws “CAT 5” at you....
1 ' )83 8) )83 & 5 The color code extends well beyond that, but since we are only dealing with 4 pairs of wire, you don’t need to know the entire Bell System color code for terminating a 900 pair distribution trunk...! What is often confusing is that the pair numbers do not line up with the pin numbers on the RJ-45 connector. In other words, conductor ONE of the cable (White w/Blue Strip) is NOT terminated to PIN ONE of the connector.
1 ' )83 8) )83 & 5 Crossover cables are used to connect switches to other switches or CABs directly to the DPU card. Also, a crossover cable is what you would use if you were to connect a CAB to another CAB, for use as a digital “snake”. A crossover cable is terminated the same way as a normal cable, except that the TX and RX pins are "swapped" at one end to allow the transmit pair of one device to connect to the receive pair of the other.
1 ' )83 8) )83 & 5 Link Connections All CAB Series products feature built-in “Buddy Link” functionality for creating backup I/O configurations in mission critical systems. The term “Buddy Link” extends to multiple dimensions within MediaMatrix, but in this context, we are concerned only with how the built-in Buddy Link works with the CAB 4n Series products.
1 ' )83 8) )83 & 5 internally. You can see this by the duplication of audio presence on the front panel meters. To prevent confusion from duplicated audio signals in the system, the secondary CAB 4n is prevented from transmitting onto the CobraNet network by the action of the Buddy Link. Therefore, only one set of audio inputs is present within the system at a time in addition and for the outputs the secondary unit’s audio output is muted.
1 ' )83 8) )83 & 5 Setting the Hardware Base Address ID Once you have a valid physical connection to the network port, you now must configure the port on both ends of the network media to establish communications between the MediaMatrix software and the CAB 4n. This is a critical configuration since you will not be able to pass audio or enable communications without it. Please keep in mind that there are two separate settings for successful communications on the CobraNet™ network.
1 ' )83 8) )83 & 5 Now you are ready to test your connection. If you have done everything correctly, you should now have communications between the Nion and the CAB 4n. If so, the front panel TX and RX LED’s will indicate traffic. You can further test the connection by testing the functions of the CAB and verifying the response.
1 ' )83 8) )83 & 5 number, into the box. (Refer to the MediaMatrix Help for information on making this control gesturable.) To complete the process, this same Bundle Number must also be set on the corresponding CAB unit for each group of four channels. In order to get audio from a given CobraNet Input or Output Block, the numbers must match in the blocks and the CAB Taxi Device or in the case for NWare the CM-1 table within the corresponding NioNode block.
1 ' )83 8) )83 & 5 GPIO Pin-Out Details The CAB4n Series include a versatile GPIO (General Purpose Input Output) system for terminating external logic, controls, relays and other external systems. Each control pin is supported by NWare for configuration, control and monitoring. Any combination of control pins may be used simultaneously, regardless of the configuration. For information on the GPIO configuration options, please refer to the NWare Help, included with the software.
1 ' )83 8) )83 & 5 Connection The rear panel of the CAB4n includes a 25-pin DSub connector (DB-25) for accessing the GPIO functions. Although it is possible to terminate GPIO functions directly to the DB-25 connector, we recommend that you use the optional breakout accessory (GPIO-25: Peavey Part# 00510490). The GPIO-25 is a convenient way to access each pin and facilitates easy rack wiring and troubleshooting.
1 ' )83 8) )83 & 5 Technical Support MediaMatrix has an extensive Technical Services Group that provides tech support, repair and implementation services. If you require assistance with your new CAB 4n, you can get help from several sources. There are many technical documents, white papers and application notes on our website and Peak Audio’s website. (See the Additional Resources section on the next page for details.
1 ' )83 8) )83 & 5 Additional Resources The use of the CAB™ 4n Series products, as well as MediaMatrix and networking technology require a thorough understanding of several advanced topics. It is highly recommended that the designer acquire an understanding of these topics so that the process of systems work is efficient and cost-effective. There are several excellent sources for obtaining information regarding these topics.
1 ' )83 8) )83 & 5 Specifications MECHANICAL of AC Dimensions (H x W x D) 19" W x 12-7/8" D x 3-1/2" H (48.26 x 29.71 x 8.78 cm) Weight 9.5 lbs. (4.3 kg) Mounting Double EIA Space Rack Mount (2U) Connections Removable “Euro” Connectors for each single channel audio inputs/outputs and RS-485 bus. RJ-45 for CobraNet™ interface, BNC for link. IEC receptacle for power.
1 ' )83 8) )83 & 5 CAB 4n PERFORMANCE Frequency Response: +0 / -0.3 dB, 20 ~ 20 kHz, referenced @ 1 kHz THD + Noise: Line Level: 0.006%, Mic Level: < 0.01% Dynamic Range: 106 dB Equivalent Input Noise (EIN): Mic Level: < -126 dBu Common Mode Rejection Ratio: 55 dB Crosstalk: 90 dB Full-Scale Line Level: +30, +24, +18, or +12 dBu Input Sensitivity Settings: Mic Level: -42 dBu at +63 dB gain Full-Scale Output Settings: settings +24, +18, +12, +6 dBu, Less than 0.
1 ' )83 8) )83 & 5 GENERAL SPECIFICATIONS A/D, D/A Quantization: 24-bit Audio Transmission Quantization: On CobraNet: 20 or 24-bit, CobraNet truncates to 20 bits unless used in reduced channel mode Sample Rate (Fs): 32, 44.1 or 48 kHz (user selectable) Master Clock Speed (256 Fs): 12.
1 ' )83 8) )83 & 5 ##
