Grass Valley AAP-1741 - Manual (Page 20)

GUIDE TO INSTALLATION AND OPERATION
16 | AAP-1741
3.3.3 Audio Output
3.3.3.1 Audio Output - CH 1-2 to CH 3-4 tabs:
Each of these tabs controls the output processing for two output channels – source selectors, level controls
and mixers for each output.
A coloured box indicates the audio type for each output of the card.
• Detected audio types can be PCM, AC3 (Dolby Digital), Dolby E or N-PCM (other non-PCM).
The Operation Mode pulldown establishes the configuration of the controls for an output channel. There are
four options:
A (see CH 1 in the figure on the right)
The source is selected using the Source A
ABUS Select and Channel pulldowns, and its
level is adjusted using the slider or data box.
• The ABUS select options are:
o
V selects one of the 16 channels from
the video card.
o
A1 selects one of the 16 channels from
an audio card. A1 is always Local,
Slave 1 or Master
o
A2 selects one of the 16 channels from
an audio card. A2 is always Slave2
or Slave.
• The output Level is adjustable from -96 to
+12 dB with the slider or a direct keyboard
entry.
SUM (A+B) (see CH 2 in the figure on the right)
Two sources are selected using the Source A
and Source B ABUS Select and Channel
pulldowns. The two sources are added, and the
level of the combined signal is attenuated by
the amount selected in the Sum (A+B) LEVEL
pulldown.
• The ABUS select options are:
o
V selects one of the 16 channels from the video card.
o
A1 selects one of the 16 channels from an audio card. A1 is always Local, Slave 1 or Master
o
A2 selects one of the 16 channels from an audio card. A2 is always Slave2 or Slave.
• The Sum (A+B) Level pulldown offers attenuations of 0 dB, -3 dB and -6 dB.
NOTE: If you attempt to mix two different audio
types to an output, only the Source A
signal will be routed to this output and the
Source A audio type will be displayed. The
Source B signal will be ignored.