GUIDE TO INSTALLATION AND OPERATION
XVP-3901 |
59
Discrete AES Detected
section
Signal presence indicators monitor the presence of AES
inputs. The indicators turn green when AES input signals are detected. The Discrete AES Detected warning color can
be configured by the user in the Alarm Config panel (Sect. 5.20)
Signal Presence
section
Signal presence indicators monitor the audio channel presence and are related to the Silence parameters defined in
the Ch XX/Silence tab (see details below): the indicator is green when an active signal is present and configurable
when a silence is detected according to the “no signal” threshold and the channel detection warning. The Signal
Presence warning color can be configured by the user in the Alarm Config panel (Sect. 5.20)
5.6.1 Audio Processing Tab
CH 1-4, …. CH 29-32 Tabs
Each of these tabs controls
Levels
,
Fixed Delays
and
Silence
detection for four audio channels; each channel is
provided with a set of controls.
Levels sub-tab
: grouped by pair of channels, each channel
has the following controls:
Level
(slider and input box): Sets the audio gain from
-96 to 12 dB in 0.5 dB steps. For non-PCM audio, the
level value is overridden to 0 dB.
Mute
(speaker button): Mutes the selected audio
channel
Phase Invert
: When checked, inverts the selected
audio channel phase.
Lock
: “Locks” both channel sliders together for levels
and delay (coarse only), so that moving one slider
moves the other one as well.
Fixed Delay sub-tab
: although the XVP-3901 automatically
matches audio and video throughput timing, provision is made
for the user to insert an audio delay offset from the nominal
value, in order to deal with problems such as lip-sync errors
and audio phase alignment in the incoming feed. For each
channel, two sliders allow the delay to be adjusted.
•
Coarse
– adjusts the delay in milliseconds, over a range
of values that depends on the Additional Frame Delay
set on the timing tab in the Video Output group (see
page 34), as follows:
Additional
Adjustment
Adjustment
Frame Delay
Range
Range
(59.94 Hz)
(50 Hz)
0
0 to 2000 ms
0 to 2000 ms
1
-33 to 2000 ms
-40 to 2000 ms
2
-66 to 2000 ms
-80 to 2000 ms
3
-99 to 2000 ms
-120 to 2000 ms
…
…
…
15
-500 to 2000 ms
-600 to 2000 ms
•
Fine
– adjusts the delay in audio sample increments,
from -100 to +100 samples.
Figure 5.40 Audio Processing - Levels sub-tab
Figure 5.41 Audio Processing - Fixed Delay sub-tab