Grass Valley 8921DAC - Manual (Page 16)

16 8921DAC Instruction Manual
Configuration
The Channel 3/4 output can be set to one of the following output modes:
• 3, 4 (Pass) – the inputs selected for Channels 3 and 4 appear at the
analog audio output unmodified.
• – 3, – 4 (both phase inverted) – the inputs selected for Channels 3 and 4
are both inverted.
• – 3, 4 (Channel 3 Phase Inverted) – the input selected for Channel 3 is
inverted while Channel 4 is non-inverted.
• 3, – 4 (Channel 4 Phase Inverted) – the input selected for Channel 4 is
inverted while Channel 3 is non-inverted.
• 3 + 4, (monaural sum) – the inputs selected for Channel 3 and 4 are
reduced in level by 6 dB, summed together, and output on both chan-
nels.
• 3 + 4, 3– 4 (MD D/E) – 3 + 4 to Channel 1; 3 – 4 to Channel 2, – 6 dB
mono sum to Channel 3 and – 6dB 3 – 4 decode/encode to Channel 4.
• – (3 + 4) (3 + 4 to Both and Phase Invert) – the inputs selected for Chan-
nels 3 and 4 are reduced in level by 6 dB, summed together, inverted,
and output on both channels.
• 1 kHz (Tone) – a 1 kHz tone is put on both channels at the analog audio
output with a – 20 dBFS level.
• 400 Hz (Tone) – a 400 Hz tone is put on both channels at the analog
audio output with a – 20 dBFS level.
• Silence – digital silence is placed on both output channels.
• 3/4 ID – Channel 3/4 identification tone. A 1 kHz tone with a – 20 dBFS
level that is 2 second continuous tone on Channel 3 followed by a 6
second continuous tone on the Channel 4 (keeps repeating).
Gain Controls
The gain of the four audio outputs can be adjusted from –40 to + 6 dB. Each
channel output can be adjusted individually or locked together in two
groups (Channel 1/2 and Channel 3/4).
Maximum Audio Analog Output Levels
Controls are provided for setting the maximum analog audio output levels
from 0 to + 24 dBu.