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Sync Source
Settings: AES 1/2, AES 3/4, AES 5/6, AES 7/8,
AES 9/10, AES 11/12, AES 13/14, AES 15/16*
Use the Sync Source parameter to select the
signal source that UpCon should sync to.
Please note that channel pairs from 9/10 to 15/16
are only available as Sync Sources when you
have the optional AES 16ch license. For more
information, see "Extending your product's ca-
pabilities with optional licenses" on page 100.
When the Clock Master parameter is set to "In-
ternal", the Sync Source setting is irrelevant.
However, you should be aware that you can use
this parameter to pre-select a sync source that
will be used when you switch UpCon AES direct-
ly from Internal to External Sync.
UpCon English Manual (2014-10-07)
Advanced Mode section (AES)
The Advanced AES Mode section contains ad-
ditional AES-related settings.
Fig. 27.: I/O setup – AES page (UpCon AES)
with Advanced settings activated
Advanced settings switch
To change advanced AES settings, click the Ad-
vanced button in the Advanced Mode section of
this page.
!
Please note that switching off access to Ad-
vanced AES settings will reset all parameters
in this section to their default values.
Clock Master parameter
Settings: External (default), Intern. 48 kHz
Use the Clock Master parameter to set whether
UpCon should be referencing an incoming ex-
ternal clock source or an internal crystal running
at 48 kHz.
Setting up audio and syncing
►
External reference is mandatory in a broad-
cast installation and therefore the default set-
ting.
►
Internal is typically only for test and labora-
tory use.
Clock Fallback parameter
Settings: Freewheel (default), Halt
Use the Clock Fallback parameter to set how the
internal clock of UpCon should be applied when
the external sync source is not present.
►
Freewheel:
When sync is lost and the Clock
Fallback parameter is set to Freewheel, the
UpCon will continue running on the "last good
rate". If possible, UpCon will run on a 96 bit
precision version of the last good sample rate
that the UpCon received. This will only gener-
ate few sample slips downstream and on the
inputs (which may still receive audio) so the
audio quality is not significantly reduced. In
some borderline cases it may not be possible
to calculate the last good incoming sample
rate. In such a situation, the UpCon will revert
to the internal 48 kHz clock and audio will still
be sent through. Expect more sample slips in
such a situation.
►
Halt:
When the sync source is not present
and the Clock Fallback parameter is set to
Halt, all AES outputs are turned off – meaning
no audio data and no AES carrier (no clock)
are being sent out. Use this setting if you pre-
fer to stop audio and clock output completely
54
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