TDM

Lighthouse Digital Systems

13465 Colfax Highway Grass Valley, Ca. 95945 1-800-323-8289

"OZ" & "JOZ TDM Routers

The new K-Series OZ from Lighthouse introduces the next generation of audio switching. OZ is a connectivity device similar in function to a traditional routing switcher, except that it does not have a crosspoint matrix. Instead, it uses a DSP/TDM high speed addressing engine in its processing core. The OZ switching system is the solution to one of the biggest problems of this decade, the digital/analog dilemma. It is I/O module independent. There are analog I/O modules, and digital I/O modules (AES/EBU, MADI, future AC3, Dolby E, Firewire, Fibre Channel, whatever). They are all connected to and from the DSP core where they can all be switched (the digital is synchronous, too) with any input (analog or digital) to any output (analog or digital). Unused channel bandwidth can also be used for time code and RS-485/422/232 switching when the appropriate optional I/O modules installed in a system. Current "OZ" Cards available are:

Time Division Multiplex (TDM) Module

Analog I/O Modules

AES I/O Modules

Time Code I/O Modules

RS422 Machine Control Modules

Local Satellite Module

Remote Satellite Module

MADI 56 I/O Module

MADI 112 I/O Module

Other advantages of OZ are the many functions not possible in a matrix switcher, functions that use the power of the DSP core. Functions such as:

Quiet “quick mix” audio switching
A stereo input can be mixed to a mono signal then sent to one channel of a stereo output with time code on the other channel of the stereo output, plus many other mix capabilities
Assigning any switcher inputs to the 2 channels in the AES outputs
Creating and analyzing audio test signals, time code, and RS-485/422
Gain adjustments
Fiber Optic I/O
Satellite I/O that can move inputs and outputs to distant locations

Analog Audio

Connector type 25-pin "D" connector

Input Characteristics

Normal level +8 dBu

Maximum level +28 dBu

Impedance 3K ohms, balanced

Output Characteristics

Normal level +8 dBu

Maximum level +28 dBu

Impedance 100 ohms, balanced

System Performance

Voltage gain Unity +/- 2 dB

Frequency response 20Hz to 20kHz +/- 0.1 dB

Bandwidth 22kHz

Dynamic range 100 dB

THD+N (10Hz to 20kHz) - 95 dB at 28 dBu

AES/EBU

Connector type 25-pin "D" connector

Data rate 10 Mbps

Output level 4.5-5V p-p

Output impedence 110 ohms

Input level 2-7V p-p

Input impedence 110 ohms

"OZ" Block Diagram