Imagine Videotek LLM-1770, Installation And Operation Manual

Page: 64 / 122

Chapter 5
Alarm Descriptions
58
Meter Based Alarms Setup Menu
Menu Selections
Table 5-2 Meter Based Alarms Setup Menu
Selection Selection Option Selection Option
Peak Audio Enable Meter 1 •• 8
Level -30 to 0 dBFS
(The default selection
depends on the Loudness
Mode selection)
Duration 0 seconds to 60 seconds (2
seconds*)
Loss of Sound Enable Meter 1 •• 8
Level -60* to 0 dBFS
Duration 0 seconds to 60 seconds (2
seconds*)
Digital Clip Enable Meter 1 •• 8
Sensitivity 1 to 100 CES (50 CES*)
Duration 0 seconds to 60 seconds (2
seconds*)
Digital Mute Enable Meter 1 •• 8
Sensitivity 1 to 100 CES (50 CES*)
Duration 0 seconds to 60 seconds (2
seconds*)
Default values for meter-based alarms are mode dependent (i.e., ATSC A/85, EBU R 128,
ARIB TR-B32, or custom). Parameters are retained separately for each mode.
Menu Selection Descriptions

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 level limit can be set
from -30 dBFS to 0 dBFS, in 1 dB increments. The peak audio duration can be set from
0 to 60 seconds.

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. The audio range is -60
dBFS to 0 dBFS, in 1 dB increments. The Loss of Sound duration can be set from 0 to 60
seconds.

Digital Clip : The Clip alarm occurs when the audio is at a maximum level for a period
in excess of the duration setting. For the LLM-1770, the accuracy of the audio clip
alarm is 0.1 dB.

Digital Mute : The Mute alarm occurs when the audio sample is “0” for a period in
excess of the duration settings.