External Clock; Dsd And Dxd; S/Pdif Output Level - M2TECH HIFACE EVO TWO User Manual

M2Tech
HIFACE EVO TWO
UNIVERSAL D-TO-D CONVERTER
REVISION P A – AUGUST 2015 www.m2tech.biz
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7.4. External clock

The HIFACE Evo Two is provided with an input for an external clock. This input is very
versatile, as it's able to recognize the frequency of the clock applied and, when needed,
synthesize the needed master clock.
The external clock input accepts all most common word clocks and the so-called "super
clock" plus, of course the master clocks generated by the Evo CLOCK Two . Moreover, it
accepts the 10MHz standard reference clock.
The external clock input can be disabled, or enabled in automatic mode: in this mode,
when a valid clock is detected on the external clock input, it is used to clock the unit,
otherwise the HIFACE Evo Two automatically reverts to the internal oscillators.
Together with the external clock input, the HIFACE Evo Two is provided with an optical
output by means of which it sends the Evo CLOCK Two information about the needed
sampling frequency. This way, the Evo CLOCK Two is able to automatically switch the
clock based on the HIFACE Evo Two requirements, without the use being asked to
manually operate it.

7.5. DSD and DXD

The S/PDIF, AES/EBU and Toslink™ output the HIFACE Evo Two is provided with can only
deliver PCM signals with sampling frequency up to 192kHz, as stated by the standard.
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Anyway, the HIFACE Evo Two is also provided with an I
S output in PS Audio format,
through which it is possible to transfer PCM signals up to 384kHz (DXD) and DSD signals
up to DSD256.
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When a DXD or DSD signal is transferred, only the I S output is enabled, while the other
output are disabled as they're not able to handle this signal.

7.6. S/PDIF output level

Sometimes it's useful to have a higher output voltage on the S/PDIF output than the
standard, (which is 0.5Vpp on 75 Ohms), for example when long cable runs must be
driven (more than 2 meters). The HIFACE Evo Two allows for doubling the output voltage
on the S/PDIF connector, to 1Vpp on 75 Ohms.
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