Cobalt Digital COMPASS 9374-EMDE Quad-Stream SDI – AES – MADI Embedder_De-embedder - Manual (Page 49)

937X-OM (V1.3) 9374-SERIES PRODUCT MANUAL 3-17
Operating Instructions
9374-Series Function Submenu List and Descriptions
Reference Select
Provides a master reference selection for SDI video
channel sync.
• Reference Select Control Selects a master reference source for video paths as shown.
Note: • See Considerations Regarding Multiple-Channel SDI (p. 3-8) for
important information regarding operating with multiple video inputs.
• Reference Selection control must be appropriately set to match
upstream video signal timing:
- If input video is not locked to a frame reference, the card should
be set to lock to the respective input choice (SDI A thru SDI D).
- If the video input is locked to a frame reference, the card should
be set to same reference.
• Free Run selection should only be used when no SDI inputs are to
be used. This selection is valid only for internally generated flat
field outputs.
• A DashBoard Reference indication is provided that alerts to a
missing reference where a reference has been selected. However,
the status indication will not detect improper reference usage
violating the conditions specified above.
Table 3-1 9374-Series Function Submenu List — continued
Shown below are appropriate selections of this control for various examples.
9374
720p 5994 SDI A IN
SDI B IN
Frame Ref 1
FS
In this example, because all inputs are
upstreamed frame synced to frame
Reference 1, 9374 can be set for ref
from either an SDI input or Reference 1.
Preferred practice is to upstream
lock all SDI and MADI sources to a
reference that is also used by this
card.
Note: 9374 Ref 1 selection should only
be used when upstream video is
also locked to the same
reference.
In this example, the 9374 is receiving only a single SDI stream. In cases
where one or more synchronous SDI streams are received, the card can be
set to reference from an SDI input. However, in addition to requiring all
streams to be synchronous, any received MADI (or AES-3id audio carrying
SMPTE 337 data) must also be synchronous with the video input (AES-3id
carrying PCM can be asynchronous).
SDI C IN
SDI D IN
FS
FS
FS
720p 5994
1080i 5994
1080i 5994
9374
720p 5994 SDI A IN
MADI IN
FS