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Notes regarding the current version
• If using 4.5 m cables to make connections, no special knowledge is required when connecting up to 16
devices. However for larger systems, further understanding of connections is required, such as how connec-
tions can be branched.
• At present, it is not possible to create systems of 64 or more devices. In the near future, it will be possible to
use devices called "bridges" to expand this to 63 x 1023 devices. However in this case as well, a certain
amount of knowledge will be required.
• In the current version, even if 63 or fewer nodes are connected, there is no limitation regarding reception of
realtime data such as audio and MIDI. However, the number of nodes that can transmit data is limited to
approximately five devices.
There is no limitation on the number of nodes that can transmit non-realtime data such as file transfers by
IEEE 1394 devices. (The current version of mLAN does not support file transfer for mLAN devices.)

Troubleshooting

The following table provides troubleshooting hints for some common problems. Before calling for professional
service, refer to the troubleshooting advice below to see if you can find and correct the cause of the problem.
Bus does not start up
• A loop connection may have been created. Check the
cable connections.
Node is not displayed
• The power of an intervening node may be off, or a cable
may be disconnected. If two or more CD8-mLAN cards
are installed in an 02R, connections are also required
between these cards.
• PC card hot plugging on the PowerBook is not supported.
If you insert a new PC card, you must restart the system. If
there are multiple 1394 adapters, you must specify the
adapter.
mLAN plug is not displayed
• The reception plug (input plug) of a Macintosh is not visi-
ble from other nodes. Make connection settings on the
Macintosh.
• For Direct mode on the CS6x/CS6R/S80, there is no
reception plug (input plug).
Connection cannot be made
• A connection may have already been specified for the
receiving device plug.
• The bus traffic may be approaching 100%.
Connection cannot be restored
• The connection may have been overwritten. Or, you have
may performed Factory Set or mLAN Initialize. These
operations will initialize the connection.
• The bus traffic may be approaching 100%.
• You may have switched devices. The connection will not
be restored if you switch to a different hardware unit,
even if the model is identical.
No sound
• Is a word clock being supplied? Does a word clock master
node exist (if the word clock source is "ext.").
• Is the Digital In of the mLAN8P connected? Is the Optical/
Coaxial setting correct?
• Has mixer muting (channel off) been defeated on the
mLAN8P/mLAN8E?
• The mLAN signals that can be received simultaneously by
one Macintosh are limited to the signals transmitted from
a single mLAN device. It is not possible to receive a total
of two or more channels transmitted from multiple mLAN
devices. Multiple channels transmitted from a single
mLAN device can be received simultaneously. Even if OMS
settings for multiple ports have been made, reception is
limited to signals transmitted from a single mLAN device.
Can't operate the panel
• The mLAN Mixer may be connected. It is not possible to
operate the mLAN Mixer and the panel simultaneously.
Can't receive/transmit MIDI
• In order to receive/transmit MIDI on the 03D, rear panel
cable connections (TO HOST cable) and DIP switch set-
tings are required.
• On the A4000/A5000 or CS6x/CS6R/S80, you must
switch between the conventional MIDI connectors and
the mLAN MIDI.
• The mLAN signals that can be received simultaneously by
one Macintosh are limited to the signals transmitted from
a single mLAN device. Even if OMS settings for multiple
ports have been made, reception is limited to signals
transmitted from a single mLAN device.
Sound is interrupted
• The cable may have been disconnected from a port
whose LED is lit red, or the power of that device may have
been turned off.
• A bus to which multiple devices are connected may have
been joined.
• The bus may contain a node with a device of an older for-
mat (IEEE 1394 - 1995), such as an older DVCam.
• On the Macintosh, numerous applications may be run-
ning, or you may be attempting to transmit numerous
channels of audio. The sound may be interrupted if a
heavy processing load is being placed on the Macintosh.
Something is wrong with the sound
• Is the word clock setting correct? If the word clock is not
synchronized correctly, the audio quality may be affected.
Also, the A4000/A5000 and CS6x/CS6R/S80 support only
44.1 kHz.
Macintosh does not synchronize with other devices
• The Macintosh cannot be the slave of other devices.
Sound is heard when you disconnect a cable
• A "blip" sound may be heard from a device receiving
mLAN audio when you disconnect the cable from the
device that is transmitting that signal. If this occurs, either
pause transmission/reception or lower the volume before
disconnecting the cable.

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   Summary of Contents for Yamaha mLAN

  • Page 1: Troubleshooting

    five devices. There is no limitation on the number of nodes that can transmit non-realtime data such as file transfers by IEEE 1394 devices. (The current version of mLAN does not support file transfer for mLAN devices.) Troubleshooting The following table provides troubleshooting hints for some common problems. Before calling for professional service, refer to the troubleshooting advice below to see if you can find and correct the cause of the problem.

  • Page 2

    Guide Book Basic concepts of mLAN Leitfaden Basiskonzepte von mLAN Guide Principes de base du mLAN Guía Conceptos básicos de mLAN...

  • Page 3: Table Of Contents

    Table of Contents Basic Concepts of mLAN ..........4 Features of mLAN.............9 Features Inherited from IEEE 1394..........9 Features of mLAN Products............9 Technical Explanations ..........10 1. About IEEE 1394 ..............10 2. Device Connections (Topology, Routes, Cycle Master) ..11 3. Bus Reset (Long, Short) ............13 4.

  • Page 4: Basic Concepts Of Mlan

    “IEEE (I triple E) 1394” high performance serial bus. In a musical environment without mLAN, dozens of various types of cables such as audio cables, phone cables, and MIDI cables are required, with different types of cable for each device and application.

  • Page 5: Midi Setup

    Basic Concepts of mLAN Figure 1: Conventional connections compared to mLAN connections MIDI setup Audio signal Audio signal Conventional connection Audio signal Audio MIDI signal signal MIDI signal MIDI signal MIDI signal CS6R tone generator MIDI Keyboard 02R digital mixer...

  • Page 6

    Basic Concepts of mLAN Home PC setup Conventional connection Audio signal WAV file Playback software Audio system Computer Speakers mLAN connection 1394 mLAN8P S/PDIF WAV file Playback software Audio system IEEE 1394-equipped Computer Speakers...

  • Page 7

    Basic Concepts of mLAN Live performance setup Conventional connection Audio signal Audio signal Audio signal MIDI signal A5000 sampler CS6x synthesizer 02R digital mixer mLAN connection 1394 1394 1394 mLAN8P mLAN8E mLAN8E CD8-mLAN S/PDIF A5000 sampler CS6x synthesizer 02R digital mixer...

  • Page 8

    Basic Concepts of mLAN DV editing setup Conventional connection Digital video signal Audio signal MIDI signal Digital video DTM system camera Video editing software Computer mLAN connection 1394 1394 Digital video mLAN8P camera S/P DIF MIDI Powered Video editing Analog...

  • Page 9: Features Of Mlan

    figuration. Signal flow between nodes can be changed without having to physically reconnect the devices, and such configurations can be recorded. • mLAN specifications will continue to be upgraded as new products are developed. mLAN sup- ports future expansions of its functionality, and is an specification that will “continue to evolve”.

  • Page 10: Technical Explanations

    Technical Explanations 1. About IEEE 1394 This is a standard defined by the IEEE (Institute of Electrical and Electronics Engineers). It is being use to implement low-cost high-speed digital networks that connect computer equipment to con- sumer devices (audio equipment, video equipment, electronic musical instruments) or to connect consumer devices to each other.

  • Page 11: Device Connections (topology, Routes, Cycle Master)

    Technical Explanations 2. Device Connections (Topology, Routes, Cycle Master) This section provides information that will be needed by power users who wish to use IEEE 1394 with maximum efficiency. Users who are connecting 16 or fewer devices (nodes) using standard 4.5 m cables will not require this information.

  • Page 12

    Technical Explanations Figure 5 Root 9 10 Tiered star Tree structure The above diagrams show the frequently-used tiered star (multiple stars that are connected) as a tree structure. In a tree structure, nodes that are not connected to another node in the direction away from the root are called “leaf nodes.”...

  • Page 13: Bus Reset (long, Short)

    In the case of mLAN devices, the cable port LED will light green to indicate cable ports connected as leaf nodes. Root...

  • Page 14: Calculating The Number Of Hops And Cable Length

    Technical Explanations 4. Calculating the Number of Hops and Cable Length The number of hops indicates the distance between two nodes in the bus (system), and expressed by the number of cables between the two nodes. The maximum number of hops is not the number of cables in the network; it simply means the maximum number of hops between any two nodes (not necessarily from the root).

  • Page 15: Bandwidth Issues

    Technical Explanations 5. Bandwidth Issues Isochronous transfer The isochronous data transfer used by IEEE 1394 is a transfer method that guarantees the right to transmit or receive data at fixed intervals (125 microseconds). This makes it possible to transmit data in realtime. It is particularly suitable for data of a realtime nature, such as video and audio. This fixed interval (125 microseconds) is managed by the cycle master node, and access rights are granted preferentially to the cycle master node.

  • Page 16: Cable Power

    Although DV cables that omit the power lines do exist, mLAN products use six-pin cables. Figure 8: Cross-section of a six-pin cable Power supply cable (8–40 V DC, maximum current 1.5 A)

  • Page 17

    For the current mLAN devices, this will generally be [B] and [c]. In other words, a system consisting solely of mLAN devices will function as a single system only if the power of all devices (nodes) is turned on. Data...

  • Page 18: Hot Plugging / Unplugging

    IDs. The system can be used immediately after it has been connected. mLAN feature One feature of mLAN is that after nodes are connected, the MIDI and audio signal flow can be routed freely without having to actually change physical connections. No particular care need be taken regarding the order of connections.

  • Page 19: Other Protocols, Drivers

    The IEEE 1394 specification is broadly used in DV connectors for digital video. Although DV includes an audio signal in addition to the video, it uses a different format than mLAN, and DV audio cannot be handled directly by an mLAN device. In order to handle DV audio on mLAN, a...

  • Page 20: Mlan Connection Manager

    Channel 2 (receiving mLAN plug) (transmitting mLAN plug) The mLAN connection manager is a function possessed by all mLAN devices, and is a module that manages the specified mLAN connections on each node. The mLAN connection manager has the following functionalities: •...

  • Page 21

    Technical Explanations The mLAN connection data is stored by the receiving device. Even when a bus reset occurs or the power is turned off, the mLAN connection data is preserved. After a bus reset occurs or the power is turned on, a receiving device will search for the transmit- ting device based on its stored mLAN connection data, and will re-establish the mLAN connec- tions.

  • Page 22: Mlan Fs Manager

    Technical Explanations 11. mLAN Fs Manager mLAN Fs Manager manages the master and slave relationship between each node’s word clock (WC/WCLK). To transmit and receive digital audio data between multiple devices correctly, you need to assign one of the devices on the bus as “master” so that the rest of the devices lock to the word clock generated from the master device.

  • Page 23: Index

    ACTIVE ............ 18 manual mode ...........22 Arbitration ..........15 master ............22 audio stream ........... 22 Mbps ........... 9 mLAN connections ........20 mLAN plug ..........20 module .............20 branch connection ........11 bridges ..........9 bus ............13 bus reset ..........13 node ............11...

  • Page 24

    This document is printed on recycled chlorine free (ECF) paper with soy ink. Auf Recycling-Umweltpapier gedruckt. M.D.G.,Pro Audio & Digital Musical Instrument Division, Yamaha Corporation Ce document a été imprimé sur du papier recyclé non © 2000 Yamaha Corporation blanchi au chlore.

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