Operation Manual

Each of the models in the Spirit M Series is fitted with a digital output. The output con-

forms to the S/PDIF standard.

The S/PDIF output conforms to the consumer standard IEC958 1989-03, and also the

Japanese standard EIAJ CP-340 1987-9

SPECIFICATION

Signal bit rate is 2.8Mhz based on the sampling frequency (Fs) of 44.1kHz

Physical connection:

Cable: 759 +/-5% (l<10m) or 759 +/-35% (l>10m)

Line driver:

Zout: 759 +/-20% (100kHz .. 6Mhz)

Vout: 0.4Vpp .. 0.6Vpp, <0.05Vdc (759 terminated)

SYNCHRONISATION

The digital output sample frequency is fixed 44.1kHz operation, when connecting to a

piece of external equipment you must ensure that the two are synchronised.

There are two ways to achieve synchronisation when operating the Spirit M Series

consoles:

1. Ensure the device receiving the digital signal is set to slave to the embedded clock in

the S/PDIF output from your console.

2. Ensure the device receiving the digital signal is fitted with a sample rate convertor,

which eliminates the need for synchronisation.

DIGITAL AUDIO CABLE

S/PDIF (IEC-958) uses 759 coaxial cable and RCA connectors. 759 coaxial cable is inex-

pensive, because it is the same cable as used in video transmission (you can buy a

video cable with RCA connectors to connect your S/PDIF equipment together). Coaxial

S/PDIF connections work typically at least to 10-15 metre distances with good 759

coaxial cable.

REMEMBER:

The Soundcraft website will contain the latest set-up files for describing the synchroni-

sation settings for many digital pieces of equipment.

http://www.soundcraft.com