Section 6
♦
Alarm Descriptions
96
CMN-41 Series Installation and Operation Handbook
Copyright © 2009, Harris Corporation
Audio Alarms Setup Descriptions
The Audio Alarms Setup menu contents are listed below.
•
Peak Audio
: The Peak Audio alarm occurs when the peak audio level exceeds the
adjustable limit for a period in excess of the duration setting. The limit can be set
from -30 dBFS to 0 dBFS, in 1 dB increments.
•
Phase
: The Phase alarm occurs when the phase difference between any audio pair
(L and R) exceeds an adjustable range for a period in excess of the duration setting.
The range is 0 to 178 degrees, in 1 degree increments. The range is a global setting.
If eight channels (four pairs) are displayed, the setting is valid for all pairs.
•
Loss of Sound
: The Loss of Sound alarm occurs when the peak amplitude falls
below an adjustable limit for a period in excess of the duration setting. This alarm
is valid for the displayed input (AES/EBU or embedded). The audio range is -60
dBFS to 0 dBFS, in 1 dB increments. The range point is global and is independent
of the scale type or input format.
•
Loss of AES Data
: The Loss of AES Data alarm monitors the AES/EBU data
stream. The alarm occurs when a loss of data is detected for a period in excess of
the duration setting.
•
Loss of Embedded Data
: The Loss of Embedded Data alarm monitors the
Embedded data stream. The alarm occurs when a loss of embedded data is detected
for a period in excess of the duration setting.
•
Continuous Tone
: The Continuous Tone alarm occurs when a continuous sound
level is present for a period in excess of the duration setting.
•
Audio Clip
: The Audio Clip alarm occurs when the digital audio is at a maximum
level for a period in excess of the duration setting. The Audio Clip indicator
appears in the table below the audio meters when an Audio Clip alarm occurs. For
the CMN-41, the accuracy of the audio clip alarm is 0.1 dB.
•
Audio Mute
: The Audio Mute alarm occurs when the audio sample is “0” for a
period in excess of the duration settings. The Audio Mute indicator appears in the
table below the audio meters when an Audio Mute alarm occurs.
•
AES/EBU V-Bit
: The V-Bit alarm occurs when the V-Bit is detected as “1” in the
audio AES source for the specified duration.
•
Embedded V-Bit Data
: The Embedded V-Bit alarm occurs when the V-Bit is
detected as “1” in the embedded audio source for the specified duration.
•
Low Audio
: The Low Audio alarm occurs when the peak audio sample does not
exceed the adjustable digital level for a period of time in excess of the duration
setting. The peak audio sample is an absolute measurement of the audio sample and
represents the true audio peak. It is not averaged over time, and can be enabled per
channel.
•
BCH
: The BCH alarm occurs when errors are detected in an HD embedded audio
packet
