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1: Introducing the 8x8 AES Nodes • 2

Version 2.0, February, 2007

its local clock to the network master. Once the local

node’s PLL is locked, the LED will illuminate solidly.

MASTER – The Livewire system employs a sophis

ticated master/slave clocking system over the Ethernet

network. By default any device may become the clock

master, however this can be changed if desired. The sys

tem has the ability to automatically change to a different

clock master should the current master become discon

nected, or otherwise inoperable. This happens transpar

ently without audio glitches. This LED indicates that this

node is currently acting as MASTER.

SYNC & MASTER with the 8x8 AES Node

When the AES Node is used in the default conﬁgura

tion the SYNC and MASTER LEDs operate as described

above. However, if the AES sync input as Livewire mas-

ter timebase is set to YES from the QOS web pages (see

section 3, Advanced Programming) these lights will op-

erate differently, as described here:

SYNC – If a valid AES signal received by the AES

input designated as AES sync source in the QOS web

page, this LED will begin to ﬂash. The LED will con-

tinue to ﬂash until the Livewire node has locked its

local clock to the AES input signal. Once the local

node’s PLL is locked, the LED will illuminate sol-

idly.

MASTER – This LED indicates that this node is

currently acting as MASTER clock source for the

Livewire network.

Bargraph LED Meters

The Livewire 8x8 nodes have a bargraph meter for

each input and each output.

INPUT (Transmit to network) METERS

The left eight meter-pairs represent the left and right

channels of each input. The meters are continuously

active, and indicate that audio is present at the associ

ated input. The lowest LED segment will illuminate at

a signal level of -42 dBfs. The top-most LED segment

represents a level of 0 dBfs – this segment should not il-

luminate except in cases of extreme input overload.

OUTPUT (Receive from network) METERS

The rightmost 8 LED meter pairs represent the left

and right channels of each audio stream being received.

Each meter is associated with the audio on the corre-

sponding output. The meter calibration is the same as

for the input meters.

The lowest Output LED segment has a special mean-

ing. These LEDs will be illuminated whenever the stream

designated for that channel is present, and the Livewire

node is locked to that stream. Therefore, the lowest LED

segment will be illuminated during silence, to indicate

that the associated Livewire stream is correctly being

received.

Rear Panel

The rear panel of both the 8x8 Analog Node and the

8x8 AES Node are essentially identical and are pictured

below:

AC (Mains) Power

The AC receptacle connects mains power to the

unit with a standard IEC (International Electrotechni-

cal Committee) power cord. The power supply has a

“universal” AC input, accepting a range from 85 to 265

VAC, 47-63 Hz. A fuse is located inside on the power

supply circuit board

IMPORTANT! As with any piece of modern elec-

tronic gear, it is advisable that precautions

be taken to prevent damage caused by power

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