9921-FS-OM (V1.18)
9921-FS PRODUCT MANUAL
3-31
Operating Instructions
9921-FS Function Menu List and Descriptions
Input Audio Status
Displays signal status and payload for embedded and
discrete audio received by the card.
Individual signal status and peak level displays for embedded audio input pairs, and AES/analog input pairs (where licensed) as
described below. AES pair status also shows sample rate.
• Unlocked: Indicates AES pair or embedded channel does not contain recognized audio PCM data.
• PCM: Indicates AES pair or embedded channel contains recognized AES audio PCM data.
• Dolby E: Indicates AES pair or embedded channel contains Dolby
®
E encoded data.
• Dolby Digital: Indicates AES pair or embedded channel contains Dolby
®
Digital encoded data.
Note: • Dolby status displays occur only for valid Dolby
®
signals meeting SMPTE 337M standard. If a Dolby pair is passed
through the card without decoding, the signal is passed with all related gain controls locked out.
• AES Dolby-encoded inputs that are routed directly to card optional Dolby decoder are detected as Dolby and are then
routed via a special path that automatically bypasses SRC. However, AES inputs to other destinations (e.g., AES em-
bedding) are first applied through SRC. These paths disable SRC if Dolby-encoded data is detected. To avoid a possi-
ble “Dolby noise burst” if an input on these paths changes from PCM to Dolby, it is recommended to set the AES SRC
control for the pair to SCR Off for an AES input that is expected to carry a Dolby signal.
• With SRC set to Off when receiving a PCM pair over an AES input, Status may display “NULL code 0, Line 0” or “Data”
instead of the expected “PCM” message. The Peak field may also display “Data” instead of the dBFS levels for the pair.
This issue is related only to the DashBoard display; the processing, control, and passthrough of PCM AES pairs is not
affected in any way by this issue.
Note:
After familiarizing yourself with the controls described in the audio routing/control sections that follow, see “Audio Routing
with GPI Control Example” (p. 3-58) for a comprehensive example using these controls for multi-source audio routing.
Table 3-2
9921-FS Function Menu List — continued
