What are the Pro/Cons and 110/75 Ohms buttons on the Onyx 800R used for?
The 110/75 Ohms impedance switch controls the output impedance of the signals output from the digital output DB-25 jack. The Pro/Cons switch controls the pro/consumer format of the status bits output from the DB-25 connector where professional is the AES/EBU standard and consumer is the S/PDIF standard. Selecting 110 Ohms and pro status will result in standard AES/EBU format, while selecting 75 ohm and consumer status will result in standard SPDIF format. Any other combination of the two switches will result in additional non-standard variations of the format, which may prove useful when synchronizing clocks with various digital gear that lies downstream.
