G E N E R A L I N F O R M A T I O N
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HD P3 / Aug 2006
For unbalanced operation, either the HI or LO side of the analog output
must be strapped to ground of the unbalanced input, with the output taken
from the other side. (Normally you would strap LO to ground, and use HI
to feed your unbalanced equipment input.) Leave the SH floating at one
end.
Unbalanced Digital Connections (SPDIF)
SPDIF INPUTS — The SPDIF (Sony/Phillips Digital Interface) or
“consumer” digital audio interface is a two wire unbalanced signal
typically on a single RCA style connector. Note that the SPDIF signal level
of approximately 500mV and 75 ohm impedance does not correctly match
the processor’s AES-3 input. We highly recommend using a “balun” or
format converter when interfacing “consumer” grade source devices to the
processor.
In cases where a consumer grade device must be interfaced and the
appropriate matching device is not available, try wiring the SPDIF center
conductor (HOT) to the HI input pin and SPDIF shell (ground) to the LO
input. Connect SH at the processor end only.
SPDIF OUTPUTS — The Vorsis HD P3 digital outputs are fixed,
professional, AES-3 formatted outputs. SPDIF consumer format is not
supported. Use an external format converter to connect the digital outputs
to consumer gear.
