3025EMC Master Control Switching & Channel Branding
Page 86 Revision 3.0.3
4.12.3 Video Diagnostic
Disable Blanking: The TV line immediately after the RP-168 switch point should not contain any
embedded audio. This is to allow downstream equipment time to recover the
data stream after a switch without introducing audio clicks and pops. To further
enhance this protection the EMC blanks this line just prior to the audio de-
embedder i.e. this box is un-checked. In some situations this blanked line might
contain audio so the EMC blanking protection can be turned off by checking this
box.
Disable SMPTE-12M-2 ATC Bypass: SMPTE 12M-2 recommends that for HD video standards
Ancillary Timecode (ATC) should be present in the Horizontal Ancillary (HANC)
space. By default the 3025EMC will move ATC from the Vertical Blanking area
(VANC) to the HANC and will not blank the VANC timecode. If the blanking is
required this option should be checked.
4.12.4 Audio Diagnostic
Disable FIFO Mute: The HD/SD audio de-embedder uses a FIFO to store samples and then deliver
them to the EMC audio processing logic. If the FIFO logic generates an error
then the audio output is normally muted i.e. this box is un-ticked. To help locate
a problem it is possible to turn off this error muting by ticking this box.
Disable Control Word Muting: The embedded audio stream should contain an audio control word
(control data). The EMC can mute the audio if this control word is missing i.e.
box un-checked. As this is commonly the case this tick box should normally be
ticked.
Disable Mute on Audio Error: The EMC looks for errors on its AES inputs and when an error
is detected in either the left or right data then both the left and right (the entire
AES stream) is normally muted. i.e. box un-ticked. AES errors that are detected
are Parity, Bi-Phase, Framing, Validity, Unlock (PLL error), and CRC. In some
situations it is possible to have just the left or right data with an error condition
but the other half of the stream is OK. This could be the validity bit not set or one
half in Professional Mode and the other half in Consumer Mode. In this case
disable audio muting by ticking this box.
4.12.5 System Log
IP Address: This is the IP address of the PC running the syslog application.
Syslog Freeware application can be found at:
http://sourceforge.net/projects/syslog-win32/files/syslog-win32/0.3/syslog-win32-
0.3.exe/download
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