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The LEI-547 accepts either AES3-1992 or AES3- ID inputs and provides a total of four outputs of digital audio to AES3-ID specifications. In addition, it provides two sets of balanced low impedance analog outputs. Transformer coupled digital inputs and outputs are standard to eliminate the possibility of ground loops. Captive screw terminal blocks are used for the AES3-1992 while AES3-ID use BNC connectors.
A front panel switch selects between BNC or screw terminal, (AES3-ID, AES3-1992). Sample rate LED's show three rates, 48KHz, 44.1KHz and 32KHz. An error detection LED indicates any errors on the incoming signal. An AC power switch on the front panel allows the user to turn the unit on or off at will. The fuse is on the front panel for easy access.
The analog conversion is accomplished using a 1- BIT Delta-Sigma converter with 18-BIT resolution. The output cells employ a unique cross-coupled design for precise amplitude and phase matching. The digital signal path uses state-of-the-art integrated circuits. The data is re-sliced and reclocked for jitter attenuation. Sample rate is automatically detected and indicated by front panel LEDs. Data errors are also detected and reported by a red LED on the front panel. The 500 series is housed in the same case as the well accepted 700 series. A black front panel distinguishes between the two series. Three 500 or 700 series can be mounted in the PRT-700 rack tray.