Midas DL371 Operator's Manual
DL371 Audio System Engine
Operator Manual
Midas Klark Teknik Limited,
Klark Industrial Park,
Walter Nash Road,
Kidderminster.
Worcestershire.
DY11 7HJ.
England.
Tel: +44 1562 741515
Fax: +44 1562 745371
Email: info@midasklarkteknik.com
Website: www.midasconsoles.com
DL371 Audio System Engine — Operator Manual
DOC02-DL371 Issue C — July 2010
© Red Chip Company Ltd.
In line with the company’s policy of continual improvement, specifications and function may be
subject to change without notice. This Operator Manual was correct at the time of writing. E&OE.
IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with arrowhead symbol within an equilateral triangle is
intended to alert the user to the presence of uninsulated “dangerous voltage”
within the product's enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user
to the presence of important operating and maintenance (servicing) instructions
in the literature accompanying the product.
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with a dry cloth.
7 Do not block any of the ventilation
openings. Install in accordance with the
manufacturer’s instructions.
8 Do not install near any heat sources such
as radiators, heat registers, stoves, or
other apparatus (including amplifiers) that
produce heat.
9 Do not defeat the safety purpose of the
polarized or grounding-type plug. A
polarized plug has two blades with one
wider than the other. A grounding type
plug has two blades and a third grounding
prong. The wide blade or the third prong
are provided for your safety. If the
provided plug does not fit into your outlet,
consult an electrician for replacement of
the obsolete outlet.
10 Protect the power cord from being walked
on or pinched particularly at plugs,
convenience receptacles and the point
where they exit from the apparatus.
11 Only use attachments/accessories
specified by the manufacturer.
12 Unplug this apparatus during lightning
storms or when unused for long periods of
time.
13 Refer all servicing to qualified personnel.
Servicing is required when the apparatus
has been damaged in any way, such as
power-supply cord or plug is damaged,
liquid has been spilled or objects have
fallen into the apparatus, the apparatus
has been exposed to rain or moisture,
does not operate normally, or has been
dropped.
14 Use the mains plug to disconnect the
apparatus from the mains.
15 Warning: To reduce the risk of fire or
electric shock, do not expose this
apparatus to rain or moisture.
16 Warning: Do not expose this
equipment to dripping or splashing
and ensure that no objects filled with
liquids, such as vases, are placed on
the equipment.
17 Warning: The mains plug of the power
supply cord shall remain readily
operable.
Midas
DOC04-DL371ECDOC Rev. B
EC-Declaration of Conformity
The undersigned, representing the following manufacturer
Manufacturer: Address:
Midas Klark Teknik Ltd. Klark Industrial Park, Walter Nash Road,
Kidderminster. Worcestershire. DY11 7HJ.
hereby declares that the following product
Product Type Number Product Description Nominal Voltage(s) Current* Freq.
DL371 Audio System Engine
115V AC
230V AC
2.50A
1.34A
50/60Hz
* With five modules fitted.
is in conformity with the regulations of the following marked EC-directives and bears the
-mark accordingly
reference number title
2004/108/EC EMC Directive (EMC)
2006/95/EC Low-Voltage Directive (LVD)
The conformity of the product with EC Directives for use in environment E4 is provided by compliance with
the following standards:
Standards/date:
Applied Electrical Safety test standards:
reference number title
EN 60065:2002
Audio, video and similar electronic apparatus. Safety requirements
Applied EMC emission test standards:
ref. no. title
EN 55103-1:1996
Class A
EN 55103-1 Annex A: Radiated
magnetic disturbance, 50Hz-50kHz
CISPR 22: Radiated disturbance,
30-1000MHz
EN 55103-1 Annex E: Conducted
disturbance, ac & signal ports
EN 61000-3-2:2000 Mains
harmonics
EN 61000-3-3:1995 Mains voltage
flicker
Applied EMC immunity test standards:
ref. no. title
EN 61000-4-2:1995 Electrostatic
discharge
EN 55103-2:1996
Class A
EN 61000-4-3:1996: Radiated RF
disturbance, 80-1000MHz
EN 55103-2 Annex A: Magnetic LF
disturbance, 50Hz–10kHz
EN 61000-4-4:1995: Fast transient
bursts, ac & signal ports
EN 61000-4-5:1995: Surge, ac port
EN 61000-4-6:1996: Conducted RF
field, ac & signal ports
EN 61000-4-11:1994: Mains voltage
dips and interruptions
Place, date: Kidderminster, UK
14th June 2010
General Manager AVP, Product Development
Printed name: John Oakley Printed name: Alex Cooper
Licences
The following are the license agreements applicable to the Midas Digital Equipment.
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IMPORTANT - Please read this document carefully before using this Midas™ or
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other machine instructions already installed on this Midas™ or Klark Teknik™
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The Midas™ or Klark Teknik™ Product will not operate in accordance with its
documentation without this software.
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provided to you for installation on, or already installed in, a Product. In addition to the Softw are,
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individual software components, each of which was written, and the copyright and other rights in
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ATTN: Linux Programs CD for Midas™/Klark Teknik™
Walter Nash Road,
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Worcestershire.
DY11 7HJ.
England.
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GNU General Public License (GPL)
For details of the Third Party Software License Attribution, Copyright and Terms and Conditions and
Notices, and the GNU LESSER GENERAL PUBLIC LICENSE, see the Midas Digital Equipment GNU
General Public License (GPL) Booklet part number DOC04-GPL issue A.
xi
DL371 Audio System Engine
Operator Manual
Precautions
Before installing, setting up or operating this equipment make sure you have read and
fully understand all of this section and the “IMPORTANT SAFETY INSTRUCTIONS” at the
front of this manual.
This equipment is supplied by a mains voltage that can cause electric shock injury!
The following must be observed in order to maintain safety and electromagnetic compatibility (EMC)
performance.
Safety warnings
Signal 0V is connected internally to the
chassis.
To completely disconnect this equipment
from the AC mains, while observing full
safety precautions (see “Power” on
page xiii), switch off the D.C. POWER ON
switch (above the PSU modules on rear of
unit) and then switch off the mains at the
mains outlet. Isolate the unit by
unplugging the three mains leads from rear
panel.
To avoid electrical shock do not remove
covers.
General precautions
In the event of ground loop problems,
disconnect the signal screen at one end of the
connecting cables. Note that this can only be
done when the equipment is used within a
balanced system.
Do not remove, hide or deface any warnings or
cautions.
Power
The power supplies contain LETHAL VOLTAGES
greatly in excess of the mains voltage and its
rails can produce extremely large currents that
could burn out equipment and wiring if shorted.
The internal power supplies are of the switch
mode type that automatically sense the
incoming mains voltage and will work where the
nominal voltage is in the range 100VAC to
240VAC.
Each mains inlet is to be sourced from its own
separate wall-mounted mains outlet socket.
Otherwise, their mains sources must be suitably
distributed so as to meet local safety
regulations.
A Volex locking type plug is fitted on each
supplied mains cable, which plugs into a mains
IEC connector on the unit. When fitted properly
the Volex plug locks into place, preventing it
from working loose, or being inadvertently
knocked loose or pulled out. To fit a Volex plug,
insert it into the mains IEC connector and push
it in until it locks in place. Then, check to make
sure it is locked in place. To remove it, release
its locking device and then pull it out. When
fitting or removing a Volex plug, always hold the
plug itself and never use the cable, as this may
damage it.
When removing the equipment’s electric plugs
from the outlets, always hold the plug itself and
not the cable. Pulling out the plug by the cable
can damage it.
Never insert or remove an electric plug with wet
hands.
Do not connect/disconnect a mains power
connector to/from the unit while power is being
applied to it. Switch the power off first.
Handling the equipment
Completely isolate the equipment electrically
and disconnect all cables from the equipment
before moving it.
When lifting or moving the equipment, always
take its size and weight into consideration. If
necessary, use suitable lifting equipment or
transporting gear, or sufficient additional
personnel.
Do not insert your fingers or hands in any gaps
or openings on the equipment, for example,
vents.
xii Precautions
DL371 Audio System Engine
Operator Manual
Installation
Before installing the equipment:
• Make sure the equipment is correctly
connected to the protective earth conductor
of the mains voltage supply of the system
installation through the mains leads.
• Power to the equipment must be via a fused
spur(s).
• Power plugs must be inserted in socket
outlets provided with protective earth
contacts. The electrical supply at the socket
outlets must provide appropriate
over-current protection.
• Both the mains supply and the quality of
earthing must be adequate for the
equipment.
• Before connecting up the equipment, check
that the mains power supply voltage rating
corresponds with the local mains power
supply . The rating of the mains power supply
voltage is printed on the equipment.
Location
Ideally a cool area is preferred, away from
power distribution equipment or other potential
sources of interference.
Do not install the equipment in places of poor
ventilation.
Do not install this equipment in a location
subjected to excessive heat, dust or mechanical
vibration. Allow for adequate ventilation around
the equipment, making sure that its fans and
vents are not obstructed. Whenever possible,
keep the equipment out of direct sunlight.
Do not place the equipment in an unstable
condition where it might accidentally fall over.
Make sure that the mains voltage and fuse
rating information of the equipment will be
visible after installation.
Audio connections
To ensure the correct and reliable operation of
your equipment, only high quality, balanced,
screened, twisted pair audio cable should be
used.
XLR connector shells should be of metal
construction so that they provide a screen when
connected to the control centre and, where
appropriate, they should have Pin 1 connected
to the cable screen.
Electrostatic discharge
(ESD) precautions
Observe full electrostatic discharge
(ESD) — also known as “anti-static”
— precautions when carrying out
procedures in this manual that are
accompanied by the ESD Susceptibility Symbol
(shown above). This caution symbol shows you
that ESD damage may be caused to items
unless proper ESD precautions are taken, which
include the following practices:
• Keep the work area free from plastic, vinyl or
styrofoam.
• Wear an anti-static wrist strap.
• Discharge personal static before handling
devices.
• Ground the work surface.
• Avoid touching ESD-sensitive devices.
Radio frequency
interference—Class A
device
This equipment has been tested and found to
comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable
protection against harmful interference when
the equipment is operated in a commercial
environment. This equipment generates, uses,
and can radiate radio frequency energy and, if
not installed and used in accordance with the
instruction manual, may cause harmful
interference to radio communications.
Operation of this equipment in a residential area
is likely to cause harmful interference in which
case the user will be required to correct the
interference at his own expense.
Electric fields
Caution:
In accordance with Part 15 of the FCC
Rules & Regulations, “… changes or
modifications not expressly approved by
the party responsible for compliance could
void the user's authority to operate the
equipment.”
Should this product be used in an
electromagnetic field that is amplitude
modulated by an audio frequency signal (20Hz
to 20kHz), the signal to noise ratio may be
degraded. Degradation of up to 60dB at a
frequency corresponding to the modulation
Precautions xiii
DL371 Audio System Engine
Operator Manual
signal may be experienced under extreme
conditions (3V/m, 90% modulation).
Safety equipment
Never remove, for example, covers, housings or
any other safety guards. Do not operate the
equipment or any of its parts if safety guards
are ineffective or their effectiveness has been
reduced.
Optional equipment
Unless advised otherwise, optional equipment
must only be installed by service personnel and
in accordance with the appropriate assembly
and usage regulations.
Special accessories
To comply with part 15 of the FCC Rules, any
special accessories (that is, items that cannot be
readily obtained from multiple retail outlets)
supplied with this equipment must be used with
this equipment; do not use any alternatives as
they may not fulfil the RF requirement.
xiv Precautions
DL371 Audio System Engine
Operator Manual
xv
DL371 Audio System Engine
Operator Manual
Contents
Chapter 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warranty and registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2 Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
DSP role status panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
sync source panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
system clock panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ethernet tunnel panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
psu panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Snake X and Y panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DSP control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
DSP audio panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
AES50 audio panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 3 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mains input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DSP modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connector panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Router panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Chapter 4 Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Connecting up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Powering the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Appendix A Technical Specification. . . . . . . . . . . . . . . . . . . . . . . .17
General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Appendix B Replacing A Module . . . . . . . . . . . . . . . . . . . . . . . . . .19
Appendix C Service Information . . . . . . . . . . . . . . . . . . . . . . . . . .21
Routine maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Voltage rail failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Hot unplugging/plugging a PSU module . . . . . . . . . . . . . . . . . . . . . . 22
Equipment disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
xvi Contents
DL371 Audio System Engine
Operator Manual
Appendix D PRO6 Live Audio System . . . . . . . . . . . . . . . . . . . . . . 23
Standard system configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
System components (standard supply) . . . . . . . . . . . . . . . . . . . . . . .26
FOH and MON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
System buses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Mix matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Audio physical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Surround capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Reliability (redundancy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Control software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
System card expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Console linking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Integration of third party hardware/software . . . . . . . . . . . . . . . . . . .32
Appendix E Setting Up A PRO6 System . . . . . . . . . . . . . . . . . . . . 35
Initial set-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Unpacking the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Making up a rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Wiring instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Powering the PRO6 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Switching the PRO6 Control Centre on/off . . . . . . . . . . . . . . . . . . . . .38
Setting up the DL351 Modular I/O unit ID . . . . . . . . . . . . . . . . . . . . .39
1
DL371 Audio System Engine
Operator Manual
Chapter 1: Introduction
Thank you for purchasing a Midas DL371 Audio System Engine. Your DL371 Audio
System Engine was conceived by Midas to offer audio professionals high-performance
audio equipment, designed to provide no-compromise sonic quality with a feature set
that offers all essential facilities and functions. It represents the very best of British
design and engineering combined with contemporary, efficient manufacturing methods,
and will give you many years of reliable service.
So, to obtain the best results with a minimum of effort, please read this operator
manual and, finally, enjoy your Midas DL371 Audio System Engine!
Overview
The DL371 Audio System Engine (and router) is of user-configurable sub-modular
construction and provides power and interconnection for up to seven DSP cards and a
router card (dual width). The DL371 Audio System Engine is housed in a 7U, 19” rack
mount box.
Each DSP module contains enough digital signal processing power to produce
24 channels of audio EQ and dynamic processing (or to mix down all the console buses
and similar etc.). Only five DSP modules are required for the PRO6. The rack can be
optionally populated to incorporate an N+1 topology.
The router module is the heart of the console’s signal routing network and provides
ports for the main and supplementary I/O racks, and the long haul digital snake from
stage to front of house.
Front panel Rear panel
(standard configuration)
2 Chapter 1: Introduction
DL371 Audio System Engine
Operator Manual
Features
The DL371 Audio System Engine has the following features:
• The front panel consists of various LED-only sections that provide status
information.
• Sub-modular construction provides user-configurable 7 x 24-channel format.
• Each module has remote interrogate LEDs for DSP control and analogue and digital
audio for health and connection status feedback.
•A diagnostics 9-way D-type connector per DSP module provides access to its
software for diagnosis, troubleshooting etc.
• Eight AES50 24-wide bi-directional digital audio EtherCon® ports are provided, four
to allow N+1 connection of the main 64-way I/O rack and four to allow dual
redundant connection of DL451 Modular I/O (24-way I/O) units or a second 64-way
I/O rack
1
.
• Dual redundant (gigabit) Hyper-MAC 192-wide bi-directional digital audio ports link
the router to the control centre on either 150 m fibre or 100 m ruggedised Cat5E
2
cables, both of which use Neutrik connectors.
• For synchronisation to external systems there are two BNC Clock ports and two XLR
digital audio reference signal (DARS) ports. Both sets of ports have one in and one
out port.
• A 100Mbs Ethernet control port (on EtherCon®) allows a ‘tunnel’ connection to
external non-Midas equipment via the control surface.
• The unit offers the facility of universal input, N+1 redundant power supplies with 3
latching mains connectors.
• The unit is force air cooled by means of 80 mm fans. These produce low noise,
which is suitable for concert sound. However, racking in separate “amp rooms” is
advised for theatre use.
Warranty and registration
Midas has total confidence in the quality and reliability of this product. To back this up,
this product comes with the standard Midas and Klark Teknik three year warranty.
Please take the time to register your product by completing and returning the
registration card or registering on our website at www.midasconsoles.com.
1. Neither the 64-way I/O rack or the DL451 Modular I/O are included in the standard (supply)
specification of the PRO6.
2. The Cat5E cables supplied are a proven tested solution, but Cat6 can also be used for installations etc.
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