Madi Outputs, Redundant Madi connection

Installation

MADI Outputs

The 64 de-embedded audio channels are also available as MADI (Multichannel Audio Digital Interface), in both co-axial and optical formats. The MADI bit stream contains all 16 channels from all four SDI inputs. The channel numbering within the MADI bit stream is one-to-one, i.e., Channel 1 of SDI 1 becomes MADI Channel 1, Channel 2 of SDI 1 becomes MADI Channel 2, and so on for the remainder of SDI 1’s audio channels. Then Channel 1 of SDI 2 becomes MADI Channel 17, and the cycle repeats. If less than four SDI inputs are in use, the

MADI bit stream time slots corresponding to the unused inputs will simply contain all zeroes.

The co-axial MADI output is on a BNC socket, and is compliant with AES10id- 2008. The characteristic impedance is 75 , at a nominal data rate of 125Mbps. Transmission distances up to 50 m are generally achievable.

The same bit stream is available in optical format on an ST type connector, allowing the MADI output signal to be transmitted by fibre if preferred. Recommended fibre types are 62.5/125 µm or 50/125 µm, multimode. Transmission distances of at least 1000 m are achievable.

SDI Input	MADI Channels

SDI 1	1 to 16
SDI 2	17 to 32
SDI 3	33 to 48
SDI 4	49 to 64

Redundant MADI connection

Using an SSL MADI Opti-Coaxunit the copper coaxial MADI signal can be converted to a parallel optical signal for a redundant optical connection (or vice versa for a redundant copper connection)

RS-422 Port

The rear panel includes an RS-422 port on a 9-pin female Dsub connector. This connector has no function at this time.

GPIO Port

A GPIO (General-Purpose Input-Output) port is available at the rear panel in the form of a 9-pin female Dsub connector. This has four inputs and four outputs, and allows the SDI-MADI’s four output SRCs (Sample Rate Converters) to be enabled from external control equipment by contact closure. Tallies confirming the SRC status are also available on this connector.

Pinout is as follows:

GPIO Port Pin	Function

1	GPI 1
2	GPI 2
3	GPI 3
4	GPI 4

5Ground

6Talley 1

7Talley 2

8Talley 3

9Talley 4

GPI Wiring

The GPI inputs are opto-isolated internally, and activate when the pin is connected to 0 V. (i.e. connect pins 1-4 to pin 5 to activate).

Vcc

Pin 1*

Pin 5 * Pins 24 are identical

Talley Wiring

The tally outputs are open-collector type, with transistors rated to 24 V. The tallies will typically be used to drive LEDs; connect the cathode of the LED to the tally output and the anode, via a suitable resistor, to an external DC voltage of not more than +24 V. The 0 V reference of the external DC voltage should be connected to pin 5.

Pin 6*

Pin 5

Ext

LED PSU

* Pins 79 are identical

ETHERNET Port

The XLogic SDI-MADI includes a standard Ethernet port (an RJ45 socket). This connector has no function at this time.

1266 specifications

The Solid State Logic 1266 is a premium analog channel strip renowned for its versatility and high-quality audio processing. This channel strip combines sophisticated features, advanced technologies, and the renowned SSL sound, making it a favorite among audio engineers and producers.

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Another key feature is the inclusion of the iconic SSL mic preamp circuitry. The 1266 is equipped with a transformer-balanced mic pre, designed to deliver warmth and presence to vocals and instruments. It provides ample gain, ensuring the ability to capture signals clearly, even from low-output microphones. The design is meticulous, featuring very low noise and distortion levels, resulting in pure, transparent sound reproduction.

The SSL 1266 also incorporates the brand's proprietary 'SuperAnalog' technology, which enhances the overall sonic performance. This technology ensures low noise and high headroom, allowing the channel strip to handle high-level signals without compromising audio integrity. Additionally, the unit is designed with a robust build quality, featuring a durable chassis and high-grade components that ensure longevity and reliability in studio environments.

Furthermore, the 1266 includes features such as a high-pass filter and an insert point for integrating external processors, providing even more flexibility in sound design. It is also equipped with a line input and a balanced output, further enhancing connectivity options.

The Solid State Logic 1266 channel strip exemplifies the perfect blend of classic analog warmth and modern functionality. It caters to a wide range of applications, from tracking to mixing, making it an indispensable tool for any audio professional seeking to elevate their sound. With its comprehensive features and SSL's legacy of quality, the 1266 is a worthy investment for those aiming for excellence in audio production.