Grass Valley DAC-1721 - Manuel (Page 3)

DAC-1721
Installation and Operation Manual
Menu Description
CHANNEL 1/2 Channel 1, Channel 2 or both channels
selection.
{STATUS}
Displays status of the different board alarms. The higher-level
alarm is displayed, even if not configured to activate the
STATUS Led. ALL OK indicates an absence of alarm.
FPGA FAILURE Faulty programmable component.
REAR PANEL ERROR Indicates an absence of the rear panel
or an incompatibility between the
module and the rear panel. The
STATUS led turns on flashing red.
NO LOCK Indicates that the input stage is not
locked on the incoming AES.
BIPHASE CODING Indicates a biphase coding error.
PARITY Indicates a parity error.
CRCC Indicates a CRCC error.
SLIPPED SAMPLE Indicates a sample slipping.
CONFIDENCE Indicates an input signal up to be low.
INVALID SAMPLE Indicates an invalid sample.
NON AUDIO Indicates the audio content of the
carrier is not linear PCM samples.
OVERLOAD Indicates an internal signal level higher
than –0.5 dBFS.
NO SIGNAL Indicates an internal signal level lower
than the selected threshold during a
user defined period.
MUTE Indicates a muted channel.
TONE indicates the tone generator is active.
{CHANNEL STATUS}
MODE Displays the coding mode of the
channel status bit.
AUDIO MODE Indicates the nature of incoming data.
CHANNEL MODE Describes the way the two channels are
used.
EMPHASIS Coding of the emphasis applied on the
signal.
FREQUENCY Sampling frequency.
WORD LENGTH Coded quantization value.
ORIGIN “origin” signal message (4 ASCII
characters).
DESTINATION “destination” signal message (4 ASCII
characters).
{TONE}
Enables to activate the tone generator. The internal tone
generator provides an 1 kHz (- 18 dBFS) sine wave. The EBU
mode provides channel identification: left channel is cut off for
250 ms every three seconds.
{LEVEL}
Enables to adjust each output level. This adjustment is made
within a range of -96 dB to +12 dB by 0.5 dB steps. The default
value is 0 dB.
{MUTE}
A mute command starts with a soft mute, followed by an AES
silence. Automatic mute is performed on non-audio or non valid
samples.
{0dBFS SETTING}
Enables the selection of the RMS value of the output sine
wave voltage associated to the digital full scale 0 dBFS.
{DE-EMPHASIS}
Enables or disables the de-emphasis configuration of a
channel.
OFF Disables de-emphasis.
AUTO Enables or disables a 50-15 µs de-
emphasis following the coded
indications of the channel status bits.
50-15 µs Manual de-emphasis.