User manual

www.merging.com/hapi Page 41
Hapi User Manual
PTP Clock The Precision Time Protocol (PTP) is a protocol used to synchronize
clocks throughout a computer network. Also known as IEEE 1588, it is a
protocol designed to synchronize real-time clocks in the nodes of a distributed
system that communicates using a network. RAVENNA is based on and uses
V2 of this IEEE standardized protocol. PTP Clocks allow for time resolution to
the Nanosecond.
Master: indicates that the current Hapi is the PTP Master
Slave: The Hapi is slave to another PTP Master
The Hapi will always try to be the PTP Master. If multiple Hapi’ or Horus’ are
used in a network environment, the Hapi 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. ADAT/SPDIF
5. MADI
6. Internal
7. RAVENNA (always slave unless there is no PTP master available)
Sync Color table: Dark Blue: Signal present Red: Unlocked
Light Blue: Signal valid Yellow: Locking
Black: No Signal Green: Locked
Note: When two or more Hapi are connected together through an Ethernet network, one of them will always be
automatically selected as master, the other Hapi' will be forced into slave state and therefore will not be
synchronized to wordclock or audio input. However, this is not a problem since all Hapi' will be synchronized.
Status: LTC IN: Corresponds to the incoming LTC frame rate
Hapi PTP status: MASTER or SLAVE
Video Format Detected:
Supported Formats:
PAL – NTSC
720p23.98– 720p24 – 720p25 – 720p29.97 – 720p30
720p50 – 720p59.94 – 720p60 (not recommended video formats)
1080i25 – 1080i29.97 – 1080i30
1080sf25 – 1080sf29.97 – 1080sf30
1080p23.98 – 1080p24 – 1080p25 – 1080p29.97 – 1080p30
Refs Sub-Menu (I/O)
This Sub Page menu is where you can view the Deviation and Jitter of the External Reference, as
measured by the Hapi synchronization circuitry.