HP N31.5 - Manual (Page 36)

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7 DIGITAL OUTPUT, EIAJ OPTICAL
This output provides the
digital audio signal ( DAS) , via optical cable
equipped with the EIAJ-type optical connector (sometimes called
“Toslink
® ”) to the digital processor.
8 DIGITAL OUTPUT, ST OPTICAL
This output provides the
digital audio signal ( DAS) , via optical cable
equipped with the ST-type optical connector (sometimes called “AT&T”) to
the digital processor.
9 DIGITAL OUTPUT, S/PDIF ELECTRICAL
This output provides the
digital audio signal ( DAS ) via cables equipped
with RCA-type connectors to the digital processor.
This input conforms to the Sony/Philips Digital Interface Standard (S/PDIF),
which calls for a 75
Ω
transmission of the DAS. Use a digital interconnecting
cable specifically designed for the 75
Ω
S/PDIF standard, such as Madrigal
MDC-2 cable, when using this input.
10 DIGITAL OUTPUT, AES/EBU ELECTRICAL
This output provides the
digital audio signal ( DAS ) via cables equipped
with XLR-type connectors to the digital audio processor.
This input conforms to the Audio Engineering Society/European Broadcast
Union (AES/EBU) professional digital audio standard, which calls for a 110
Ω
transmission of the DAS. Use a digital interconnecting cable specifically de-
signed for the 110
Ω
AES/EBU standard, such as Madrigal MDC-1 cable,
when using this input, with pin assignments as indicated below:
1 2
3
Pin 1: chassis ground (AC-coupled)
Pin 2: non-inverted digital
Pin 3: inverted digital
Connector ground lug: chassis ground
It has been Madrigal’s experience that the AES/EBU interconnection stan-
dard offers the best quality of all digital transmission interfaces when fully
optimized, and we recommend its use wherever possible between Mark
Levinson components.
However, optimizing any digital interface completely represents a significant
engineering challenge. It is entirely possible that a different type of input
may actually outperform a less-than-optimized AES/EBU implementation on
some brands of digital processors. For this reason, we have gone to great
lengths to fully optimize all four of the digital outputs on the Nº31.5. If you
are using you Nº31.5 with a different brand of processor, we recommend
experimenting to determine which type of input on that processor results
in the best audible performance.