User`s manual

AEQ FORUM - DIGITAL AUDIO MIXER FOR BROADCAST APPLICATIONS

2.2.2.6. Order Microphone

Talk-back or order microphone input is identified as TBACK MIC in the CONTROL ROOM

section on the rear panel of the AEQ FORUM. The input includes selector MIC / LINE and

Phantom ON / OFF.

XLR - Female 3p. Balanced connection.

3P XLR pin-out – solder side view

Pin 1  GND

Pin 2  input +

Pin 3  input -

Talkback microphone could be dynamic or electrec external standard mic or goose-neck

included like option.

2.2.2.7. Optional MADI communications module

On the rear panel of AEQ FORUM you can find the physical connector for the AES10 - MADI

interface built into the console. The connector is an SFP chassis (Small Form-Factor pluggable

– SFP) where you allocate the optional fiber-optic transceiver.

MADI protocol, which stands for multi-channel audio digital interface is a professional standard

of data transmission for digital audio signals over 56 channels on a single cable. MADI protocol

is documented in the standard AES10-1991 and ANSI s4.43-1991.

AES10 MADI multi-channel interface is an extension of AES3 protocol for interconnection of

multi-channel. MADI protocol, as defined in the AES10 standard allows connection of up to 64

audio channels (linearly quantified data) with a resolution of 24 bits per sample and a sampling

rate frequency of 48 kHz/s. Transmission is accomplished in a serial mode and if transmission

is done on a single 75 ohm coaxial cable with BNC connectors the distance reached is greater

than 50 m. If transmission is accomplished on a multi-mode fiber-optic interface the distance is

up to 2 km.

MADI fiber optic connectors in AEQ FORUM

The audio samples may have a maximum of 32 bit quantization. Additionally, by using this

protocol, the bits of validity user status and parity of AES3 are maintained. The MADI protocol

allows connect 64 audio channels with a single pair of wires. The data bit rate is 100 MBits/s

corresponds to a synchronous connection.

MADI Interface Specifications (optional):

• Optical fiber connector, FDDI PMD type

• Nominal range: 2.000 meters

• Fiber Type: 62.5 / 125 µm MULTIMODE

• Transmission: LED, 1300 nm

Female

Connector

- Input

Male Connector

- Output