Cobalt Digital COMPASS 9374-EMDE Quad-Stream SDI – AES – MADI Embedder_De-embedder - Manual (Page 55)

937X-OM (V1.3) 9374-SERIES PRODUCT MANUAL 3-23
Operating Instructions
9374-Series Function Submenu List and Descriptions
(continued)
Option +LTC allows bidirectional transfer and conversion between VANC formats over SDI and audio LTC, as well as
RS-485 LTC. Audio LTC can be received or sent over digital audio using selected embedded or AES channel, as well
as via two RS-485 ports on the card.
RS-485/Audio LTC can be derived from each card SDI channel VANC timecode.
Note: The controls shown here are present on each Timecode A thru Timecode D tab and provide independent insertions onto the
respective SDI path. (9372 and 9371 have correspondingly fewer tabs and SDI source selections).
Controls for Receiving LTC (LTC Rx)
The controls described below allow receiving RS-485 or audio LTC. When selected as a source using the Priority controls, the
received LTC can be embedded as SMPTE 12M timecode on the corresponding DCI output stream.
• LTC Input Select Control
Selects source to be used by card SDI channel LTC encoder to receive LTC
as listed below.
• RS-485 over COM1 or COM 2
• Audio LTC over SDI A Emb Ch 1-16
• Audio LTC over SDI B Emb Ch 1-16
• Audio LTC over SDI C Emb Ch 1-16
• Audio LTC over SDI D Emb Ch 1-16
• Audio LTC over MADI Ch 1-64
• Audio LTC over AES Ch 1-16
Note: • Audio LTC Source must be appropriately set for card to receive and
process received LTC.
• Card audio inputs will not center inputs with DC offset. If input has
DC offset, the source may need to be capacitively coupled to remove
the offset.
• Input LTC Source Status Display
• If Audio/RS-485 LTC is being received on selected LTC Input source,
the timecode running count is displayed.
• LTC Selected as Prioritized Choice
The example here shows using the Source Priority controls to select receive
Input (non-SDI VANC) LTC as first priority. In this example, if Input LTC is not
received, the LTC encoder fails over to self-generated Free-Run.
When Input LTC is used by appropriately setting it as a valid priority, it can
be embedded and outputted as SMPTE 12M SDI timecode similar to any
other format as described earlier.
Table 3-1 9374-Series Function Submenu List — continued
+LTC
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•
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