Ensemble Designs 9455 3G Clean and Quiet Protection Switch - Manual (Page 25)

www.ensembledesigns.com 7435 and 9455 - page 25
Model 7435 and 9455 Clean and Quiet Protection Switches
Aud Detect Menu
The Aud Detect menu shown on the following page allows you to configure which groups and
channels are monitored for embedded audio presence, to set the VU levels, to set the silence time
before an alarm is triggered, and to monitor audio status.
The Group Select, Group Detect and Ch1, Ch2, Ch3, Ch4 controls work together as follows:
• Group Select – this pull down allows you to select Group 1, Group 2, Group 3 or Group 4.
Then use the Group Detect control and the Ch1, Ch2, Ch3, Ch4 enable/disable buttons to
define how you would like the selected group monitored, as described below.
• Group Detect– select Detect or Off individually for each of the four embedded audio groups
(Group 1, Group 2, Group 3, Group 4).
• Ch1, Ch2, Ch3, Ch4 – enable or disable monitoring of all 16 audio channels as follows:.
When Group 1 is selected in the Group Select control, the Ch1, Ch2, Ch3, Ch4 enable/disable
buttons represent Channels 1, 2, 3 and 4.
When Group 2 is selected in the Group Select control, the Ch1, Ch2, Ch3, Ch4 enable/disable
buttons represent Channels 5, 6, 7 and 8.
When Group 3 is selected in the Group Select control, the Ch1, Ch2, Ch3, Ch4 enable/disable
buttons represent Channels 9, 10, 11 and 12.
When Group 4 is selected in the Group Select control, the Ch1, Ch2, Ch3, Ch4 enable/disable
buttons represent Channels 13, 14, 15 and 16.
Each embedded group contains four audio channels. Sensing for each channel can be enabled
separately.
• Aud Thrsh – select the silence detection level from 0 VU to –40 VU in 5 VU increments.
Note: An audio signal level of 0 VU corresponds to -20 dBFS and is the generally accepted
digital reference level for AES audio. The 9455 and 7435 use the standard weighting and
ballistics of VU (Volume Unit) measurement rather than decibel-based measurement in order
to more closely represent audio levels as perceived by the listener.
• Audio Time – set the time that the channels must be continuously silent before an alarm
is triggered (0 – 20 seconds). Note that a loss of embedded audio will cause an immediate
switch, regardless of this setting.
The following status displays are also provided:
• Pri Status – shows the status of the four audio channels (of the currently selected Group)
embedded in the Primary signal. Green indicates Channel OK, red indicates silence, and gray
indicates channel not enabled. An OK indicator shows the overall result of the test for all the
channels enabled.