Sigma MRX Series Manual do Operador descarregar pdf (Página 5)

INTERCONNECT WIRING

AUDIO FRAME - ANALOG

The MRX Analog Audio Switching System is designed to accept both balanced and unbalanced

audio signals having an input level of +26dBu or less in to Hi-Z (+24 dBu into 600Ω). Balanced audio

signals are connected to the audio frame via a 3-wire cable attached to the 3-position, detachable, terminal

block. Unbalanced signals can utilize a 2-wire conductor and connect the ground wire to both the “C” and “-

“ terminals on the 3-position, detachable, terminal block.

There is an individual connector assigned for each input and output. To achieve termination on the

audio switch module, a load resistor may be added across the terminal block where the incoming wire is

attached.

Audio frames can be configured as a full 32x32 matrix or the frame may be partitioned to

accommodate multiple channels. The figure below shows an audio frame configured for a channel of 32x32.

In applications utilizing stereo audio, two 1RU frames are required, one for each channel.

Outputs 1-32 Channel 1

Inputs 1-32 Channel 1

AUDIO FRAME - DIGITAL

Digital audio frames are available in two configurations - the MRX-TDAF for balanced audio signals

(AES-3 1992) and the MRX-CDAF for unbalanced audio (AES-3 ID). Unlike analog audio, where the same

connectors can be utilized for both types of signal, the digital audio frames have different rear panels for

each model. The MRX-TDAF (balanced digital audio) rear panel contains 3-position detachable terminal

blocks to accept a 3-conductor cable and each is terminated with a 110Ω resistor on the PCB. The MRX-

CDAF (unbalanced digital audio) rear panel contains BNC’s to be used with coaxial cable and are

terminated with a 75Ω resistor on the PCB. There is a separate connector assigned for each input and

output.

Audio frames can be configured as a full 32x32 matrix. The figure below shows an audio frame

configured for a channel of 32x32.

Outputs 1-32 Channel 1

Inputs 1-32 Channel 1

1 2 3 4 5 6 7 8 9 10 ... 22 23

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Sigma MRX Series Manual do Operador Página 5