User manual

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Horus User Manual
IO & Sync Menu
The IO and Synchronization menu is where the user can select the source of the Horus reference
clock. It is essential that these settings are configured correctly in order to ensure a clean audio
signal through the Horus unit.
Reference Source Choose which sync source is desired by pressing on the respective
Reference source.
Available Reference Sources are: MADI, Sync or AES
Reference navigation Selecting a Reference with multiple choices (such as Sync or AES) will
enable the source navigation. The navigation is performed from top to bottom
and will cycle through in such order at each consecutive pressing. The
selection of another Reference Source will re-select the top entry by default.
PTP Clock The Precision Time Protocol (PTP) is a protocol used to synchronize
clocks throughout a computer network. Also known under IEEE 1588, it is a
protocol designed to synchronize real-time clocks in the nodes of a
distributed system that communicate using a network. Ravenna is based on
and uses V2 of this IEEE standardized protocol. PTP Clocks allow for a time
resolution down to the Nanosecond.
Master: indicates that the current Horus is the PTP Master
Slave: The Horus is slave to another PTP Master
The Horus will always try to be the PTP Master. If multiple Horus are used in
a network environment, the Horus set in this order will have the PTP Master
priority, using the Best Master Clock Algorithm (BMCA):
1. Video sync
2. Word Clock
3. AES
4. MADI
5. Internal
6. Ravenna (always slave unless there is no PTP master available)
Sync Colour table: Dark Blue: Signal present
Light Blue : Signal valid
Black: No Signal
Red: Unlocked
Yellow: Locking
Green: Locked