Bedienungsanleitung Midas PRO3 (Seite 63 von 666) (Englisch)

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PRO Series Live Audio Systems

Owner’s Manual

Three additional surround modes operate as follows:

• Quad Left – Right – LS – RS routing to matrices 1, 2, 5 and 6.

• Surround Left – Right – Centre – Surround routing to matrices 1, 2, 3, 5 and 6.

• 5.1 surround Left – Right – Centre – Sub – LS – RS routing to matrices 1, 2, 3, 4,

5 and 6.

Network

The MidasNET network of the PRO Series utilises the physical connectivity of Ethernet

(EtherCon® connectors and Cat 5e/copper cable), but replaces its data protocol with

AES50 protocol (implemented as SuperMac) and the HyperMac high capacity system,

which are more suited to high quality, low latency audio distribution. The use of the

AES standard allows straightforward interfacing with any third party hardware that also

utilises this connection.

MidasNET connections carry digital audio, control data and standard Ethernet traffic

bi-directionally down a single cable. Cat 5e cable is used for the ‘local’ connections and

the single digital ‘snake’ (equivalent to a 384-channel analogue multi-core) between

control centre and DL371 Audio System Engine. The combination of audio, control,

clock and third party Ethernet data in a single network means that the hardware

interfaces on a single RJ45 connection.

All system connections are duplicated for full dual redundancy.

Reliability (redundancy)

All critical system connections and most components incorporate integral backup and

recovery strategies such as redeployment of resources, N+1 redundancy or dual

redundancy etc. A modular approach to software, hardware and physical construction

also aids reliability and simplifies servicing. The following lists some examples:

• The DL371 Audio System Engine incorporates N+1 redundant power supplies and

five modules, with the capability to fit an optional sixth spare module. The standard

failure recovery for modules will be redeployment of critical roles typically causing

loss of some less important inputs. With the optional sixth module fitted, the system

will operate as N+1 and there will be no loss of function after redeployment.

• The router is contained in the same rack and incorporates dual HyperMAC

connections in and out.

• The control centre contains dual redundant master controllers, dual GUI screens and

N+1 redundant power supplies.

• All I/O units incorporate dual redundant power supplies, and the DL351 and DL451

are modular in blocks of eight to limit the potential for total audio connection failure.

This resilience strategy provides high reliability performance at a reasonable cost

because it is designed in from the start and not as an afterthought.

Control software

The operating system of the PRO Series is Linux, which is an open-source, stable,

proven operating system (OS). Linux is used in many mission-critical applications

worldwide and has allowed Midas’ software engineers to write a ground-up system that

contains no ‘hidden’ or unused code. This has resulted in an efficient, compact

application, which is quick in operation, quick booting and comparatively easy to debug.

Two copies of the master control software run on separate processors to provide

resilience to failure.

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Midas PRO3 Seite 63

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