Cobalt Digital COMPASS 9086 Embedded Audio Loudness Processor - Manual (Page 67)

9086-OM (V4.3) 9086-SD PRODUCT MANUAL 3-39
Operating Instructions
Troubleshooting
Audio signal(s) do not route as
expected.
Parameter control not available
as expected.
• Embedded audio contains
Dolby
®
E or Dolby Digital
encoded signal
• When a valid Dolby ® E or Dolby Digital
signal (in accordance with SMPTE 337M) is
detected on an embedded audio signal,
SRC is automatically bypassed (disabled)
along with gain and polarity controls being
bypassed (even though controls may appear
to be functional). Gain and polarity controls
are not available for this signal type.
Refer to Status displays in Audio Input
Controls function submenu tab on page
3-10 for more information.
Audio not processed or passed
through card. • Input audio of type that
cannot be locked by 9086
card
• Embedded audio must be nominal 48 kHz
input.
Note: Although the Status Displays in Audio
Input Controls function submenu tab will
show audio formats other than “Present,
Professional” as being locked (such as
“Present, Consumer”), in any case the
audio must be at nominal 48 kHz rate for
lock and processing to occur.
• Enable control not turned on • Group Enable button for Embedded Audio
Group 1/2 or Embedded Audio Group 3/4
function submenu must be turned on for
sources to be embedded into respective
embedded channels.
• Dolby-encoded pair not
recognized by downstream
devices/systems
• If framesync is enabled and using Input
Video as source, Audio SRC must be set to
Off to maintain integrity of Dolby pair for
downstream devices.
Unusually high LKFS level with
noise in channels. Undecoded Dolby
®
E or AC-3
channels routed to Audio
Loudness Processor input
channel
Encoded Dolby E or AC-3 data cannot be
directly applied to the loudness processor. If
passthrough or other routing is used to pass
the Dolby stream though the card, the output
channels must not be routed through the
loudness processor.
Table 3-4 Troubleshooting Processing Errors by Symptom — continued
Symptom Error/Condition Corrective Action