A__mic8 / A__digital8 User Guide
Version: 10.0.0/4
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6. Synchronization
6. Synchronization
6.1
Sync Reference Options
The active sync source for the A__mic8 / A__digital8 is selected using the RAVENNA Web UI:
Sync source options (A__mic8)
Sync source options (A__digital8)
For the
A__mic8
, you can choose one of three options:
·
PTP
– arriving from/sending to the RAVENNA streaming network (via ETHERNET A or ETHERNET B).
·
Internal
– the device's own internal sync generator.
·
WCLK In
– external wordclock connected to the WCLK IN.
For the
A__digital8
, there is a fourth option:
·
AES3 In 1
– external AES3 connected to IN 1.
To sync to an external reference, the clocking signal
MUST
match the internal sample rate of the device.
6.2
Using PTP
For correct synchronization via PTP, the RAVENNA streaming network requires a PTP master clock source. This
can be achieved by using a RAVENNA node or installing a separate grandmaster device. A PTP master should
be capable of taking an incoming sync signal and generating PTP clock. Please note:
·
PTP uses a master-slave approach in which all master-capable devices elect the best master, called the
grandmaster, according to a common algorithm known as the “Best Master Clock Algorithm”.
·
At any moment in time, there can be only one PTP master operating on the network.
·
For a master-capable device, the RAVENNA Web UI defines the
: Slave only or master-slave.
In master-slave mode, the device will operate as either a master or slave depending on the PTP priorities
set within the device itself and all other streaming nodes.
