Grass Valley 8920ADC v.2.0 - Manual (Page 12)

6 8920ADC Instruction Manual
8920ADC Analog Audio to AES/EBU Converter
Table 3 provides the possible input conditions and the output condition
that results.
Table 2. Indicator LEDs and Conditions Indicated
LED Indication Condition
FAULT
(red)
Off Normal operation.
On continuously Module has detected an internal fault.
Flashing Reference input is faulty or not present.
COMM
(yellow)
Off No activity on frame communication bus.
Long flash Location Command received by the module from a remote control system.
Short flash Activity present on the frame communication bus.
CONF
(yellow)
Off Module is in normal operating mode.
On continuously
Module is initializing, changing operating modes or updating firmware. Simulta-
neous CONF and FAULT LEDs on indicate FPGA load error.
Flashing Indicates rate of change of paddle-controlled analog setting.
PWR
(green)
Off No power to module or module’s DC/DC converter failed.
On continuously Normal operation, module is powered.
REM OVER
(yellow)
Off Module configuration matches switch and jumper settings.
On continuously
Module configuration may not match switch and jumper settings. Control has been
remotely overridden.
LOCK
(green)
Off Module does not detect a valid AES in reference signal.
On continuously Valid AES in reference signal is present and module is locked to it.
LEFT IN
(green)
Off Left channel level is less than -20 dBFS.
On continuously Left channel level is greater than -20 dBFS.
Flashing Left channel level is transitioning through -20 dBFS
RIGHT IN
(green)
Off Right channel level is less than -20 dBFS.
On continuously Right channel level is greater than -20 dBFS.
Flashing Right channel level is transitioning through -20 dBFS
LEFT IN
CLIP
(red)
Off Left channel digitized signal level is less than -0.5 dBFS.
On continuously Left channel digitized signal level is greater than -0.5 dBFS.
Flashing Left channel digitized signal level is transitioning through -0.5 dBFS.
RIGHT IN
CLIP
(red)
Off Right channel digitized signal level is less than -0.5 dBFS.
On continuously Right channel digitized signal level is greater than -0.5 dBFS.
Flashing Right channel digitized signal level is transitioning through -0.5 dBFS.
Table 3. Possible Operating Conditions
Audio Input Condition Reference Input Condition Output Condition
Audio inputs present Valid reference input present AES/EBU serial digital output sampled at 48 kHz.
No audio input signal present Valid reference input present AES/EBU serial digital output sampled at 48 kHz. See S/N specification for level.
Audio inputs present Reference not present AES/EBU serial digital output sampled at approximately 47.992 kHz. Internal
freerun clock rate.
Audio inputs present Invalid reference input Invalid AES/EBU serial digital output.