13
Introduction
Introduction
The following items are included with the M-400. Make sure that all
of them are present.
• The M-400 itself
• Power cord
* Use only the power cord that was included with the M-400.
• REAC connector covers (three)
• Channel number sticker
• Ferrite cores (three)
• Owner’s manual (the document you’re reading)
• Cover
The explanations in this manual include illustrations that depict
what should typically be shown by the display. Note, however, that
your unit may incorporate a newer, enhanced version of the system
(e.g., includes newer sounds), so what you actually see in the display
may not always match what appears in the manual.
The following input/output units can be connected to the M-400’s
REAC ports.
• S-1608 stage unit
• S-0816 FOH unit
• S-4000S 40-channel I/O modular rack (Ver. 2.010 and later)
In this manual, we may abbreviate these units as the S-1608, S-0816,
or S-4000S, or may refer to them collectively as input/output units.
Text enclosed in square brackets [ ] indicates a button. For example,
the direction to “press [METER]” means that you are to press the
METER button.
If a secondary name is shown for a button, such as [DISP (BUTTON
ASSIGN)], the text in parentheses indicates the function that the
button has when pressed while holding down [SHIFT].
In the case of function buttons, the function is given in parentheses,
such as [F1 (LINK)].
This owner’s manual uses various icons. These icons indicate
supplementary information about the M-400’s functions or
operation.
The REAC (Roland Ethernet Audio Communication) interface is the
core of this system. It uses a proprietary protocol based on Ethernet
technology, and allows 40 channels of digital audio to be sent via a
single Cat5e Ethernet cable.
REAC can do the following.
• Send 40 channels of digital audio
• Send audio up to 100 meters on one Cat5e cable
• A switching hub or the S-OPT option can be used to extend the
cable.
• Use a switching hub to easily split the signal
• The transmission delay between REAC devices is extremely
small (approximately 375 microseconds)
When the signal passes through a switching hub, there will be
approximately 200 microseconds of delay for each unit.
Since Cat5e Ethernet cables are used, it’s very easy to connect REAC
devices to each other. Cat5e Ethernet cables are commonly used for
computer network connections, and have RJ45 plugs.
Types of Ethernet cable
There are two types of Ethernet cables. Although both types have the
same exterior appearance, their RJ45 plugs are wired differently, as
follows.
•
Crossover cable
The internal wiring of the cable is crossed at each RJ45 plug.
This means that the connections of the RJ45 plugs will differ at
each end of the cable.
•
Straight cable
The internal wiring of the cable is the same at each end.
Crossover cables (such as RSS SC-W100S or RSS W100S-R) should be
used when connecting to the REAC ports on this product.
Certain cautions apply if you’re using a conventional
switching hub with this system. For details, refer to “REAC
applications” (p. 181).
Check the included items
Conventions used in this
manual
Names
About the icons
Indicates important information that will help
you avoid personal injury, or damage to the M-
400 or other devices.
Indicates supplementary information on a re-
lated topic.
Indicates an idea for using the function being
explained.
Indicates a reference page.
Basic knowledge about REAC
About REAC
About cables
M-400_v15_e.book 13 ページ ２００８年６月２０日 金曜日 午後４時５分
