Cobalt Digital COMPASS 9374-EMDE Quad-Stream SDI – AES – MADI Embedder_De-embedder - Manual (Page 40)

3
Considerations Regarding Multiple-Channel SDI
3-8 9374-SERIES PRODUCT MANUAL 937X-OM (V1.3)
Considerations Regarding Multiple-Channel SDI
The 9372 and 9374 cards accommodate multi-channel SDI inputs. While each
SDI input supports the full range of formats (with four-group audio) as
specified in Technical Specifications (p. 1-14), note the considerations and
limitations described below.
In the event that a non-allowed combination is received by the card, the
offending channel outputs a valid flat field, with indication of the error shown
on the card
Status tab.
Note: Unless all SDI inputs received by the card are synchronous, all SDI inputs
should be frame-synchronized using a common frame reference, with the
same reference also to be used by this card. MADI sources should also be
frame-referenced to either the video being used or a reference. AES audio is
sample-rate converted to accommodate minor timing variances. Received
SMPTE 337 (Dolby
®
data) over an AES input is automatically bypassed from
the sample rate converters; this data must be synchronous to video.
In the above, “SD” is interchangeable with 1080p60.
Allowable Format Combinations
A: HD
B: HD
C: SD
D: SD A: SD
B: SD
C: HD
D: HD A: HD
B: HD
C: HD
D: HD A: SD
B: SD
C: SD
D: SD
If a non-allowed combination on the SDI inputs is
received, the card displays the following in the
Video Path Status display: