Cobalt Digital Inc 9902-2UDX Product Manual page 77

Operating Instructions
Table 3-2 9902-2UDX Function Menu List — continued
Audio LTC controls described below only appear on cards with +LTC licensed optional feature. This feature
allows audio LTC from an audio channel to be used as a timecode source, with conversion to a selected SMPTE 12M format on
the output video.
• Timecode Source Status Displays
• LTC Input Control
•
•
•
• Mute LTC Control
• Incoming ATC Packet Removal Control
9902-2UDX-OM (V1.0)
9902-2UDX Function Menu List and Descriptions
(continued)
Displays the current status and contents of the four supported external
timecode formats shown to the left.
• If a format is receiving timecode data, the current content (timecode
running count and line number) is displayed.
• If a format is not receiving timecode data, Not Present is displayed.
Selects source to be used by card to receive LTC as listed below.
• RS-485 over COM1 or COM 2
• Audio LTC over Emb Ch 1 thru Ch 16
• Audio LTC over AES Ch 1 thru Ch 16
• Audio LTC over Analog audio Ch 1 thru Ch 4
Note: • Audio LTC Source must be appropriately set for card to receive
and process received LTC.
• If COM 1 or COM 2 is used for LTC receive, the port function
must be set for LTC. See COMM Ports Setup Controls (p. 3-58)
for more information.
• 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.
• LTC embedded channel selections are only channels associated
with the selected path.
Allows LTC audio or RS-485 output to mute upon loss of selected
timecode inputs.
• When set to Enabled and input timecode is lost:
• RS-485 LTC output goes to frozen state.
• Audio LTC output mutes.
• When set to Disabled and input timecode is lost:
• RS-485 LTC output keeps counting, with count value being free-run
count.
• Audio LTC output is not muted, with count value being free-run
count.
Note: If muting upon loss of a particular input format is desired, set all
Source Priority 1 thru 4 to that particular input format. If this is not done,
the card failover timecode selection may substitute another format choice
for the format not being received.
Enables or disables removal of existing input video ATC timecode
packets from the output. This allows removal of undesired existing
timecodes from the output, resulting in a "clean slate" where only desired
timecodes are then re-inserted into the output. (For example, if both SDI
ATC_VITC and ATC_LTC are present on the input video, and only
ATC_LTC is desired, using the Removal control will remove both
timecodes from the output. The ATC_LTC timecode by itself can then be
re-inserted on the output using the other controls discussed here.)
Note: Set this control to Enabled if Free-Run timecode is to be used. If
incoming packets are not removed, output embedded SMPTE timecode
may alternate between free-run and embedded SMPTE timecode values.
9902-2UDX PRODUCT MANUAL
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