8
Clock Source Selection
The Alpha-Link unit can operate either as a Clock Master device (‘Internal’
mode), or as a Clock Slave device locked to an external clock signal.
Possible external sources are:
• ADAT (Alpha-Link AX and MADI-AX)
• AES/EBU (Alpha-Link MADI-SX and LIVE)
• MADI (Alpha-Link MADI-AX, MADI-SX and LIVE)
• Wordclock (all units)
Pressing the CLOCK button will step through each of the possible options, each illuminating the
corresponding LED. When the button is released, the entire Alpha-Link will lock to that source. Note
that a flashing clock LED indicates that although the corresponding mode has been selected, the
Alpha-Link is not receiving a valid Master Clock signal via the selected port/input.
If either ADAT or AES/EBU are selected as an external clock source, it may be necessary to preset which ADAT
port – or AES/EBU input (port A only) – is used to derive the clock signal from. In the same manner, the ‘External’
source – MADI or Wordclock – must also be preset. Please refer to the System Settings and Diagnostics section
of this guide for details of how to preset these clock sources.
When the Alpha-Link unit is used as part of a Mixpander setup, the CLOCK button will be disabled and the clock source
must be selected in the SSL Mixer software. Note however that the Mixpander card only operates as a Clock Slave
and therefore it is the Alpha-Link which provides a clock signal to the Mixpander card.
Alpha-Link LIVE units are preconfigured to receive an external clock extracted from the incoming MADI stream
AES/EBU (or ADAT)
Internal
External
(MADI or Wordclock)
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