CMN-91
Installation and Operation Manual
Alarm Descriptions
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 140
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-91, 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