7800/7700 MultiFrame Manual
7812UDXD Series 3G/HD Up/Down/Cross Converter with Simultaneous Dual Format Outputs and AES I/O
Revision 1.1.1
Page - 175
6.50.5. Program x Peak Limiter
6.50.5.1. Peak Limit
The
Peak Limit
is used within the audio program chain to provide an upper limit to peak program levels.
Sometimes referred to as a “brick-wall” limiter. This control is used to maintain the upper limit of the peak
levels. The peak limit control has a range from -15 dBFs to 1 dBFs.
6.50.6. Program x Intelligain Threshold (1, 2, 3)
6.50.6.1. Gain Level Threshold (1, 2, 3)
The
Gain Level Threshold
control is used for real time monitoring and SNMP trap alarming. By defining
the output level, the IntelliGain
system will send an SNMP alarm to VistaLINK
®
if the output loudness
level exceeds the defined output level. For example, by setting this control to –18 dBFs, if the calculated
output loudness level exceeds –18 dBFS (for the specified fault duration) then an alarm will be sent to
VistaLINK
®
for immediate operator notification. There are 3 levels of alarm thresholds. These can be
setup as minor, major and critical alarming thresholds. The
Gain Level Threshold
has a range of -65
dBFs to -1 dBFs.
6.50.6.2. Fault Duration
The
Fault Duration
control defines the amount of time that the IntelliGain
system detects the output
level has been exceeded. For example, if this control is set to 25 seconds, it means that the output level
has to be exceeded for a minimum of 25 seconds before an SNMP trap alarm is sent to VistaLINK
®
. The
Fault Duration
has a range of 0.5 sec to 240 seconds.
6.50.6.3. Clear Duration Control
The
Clear Duration
defines the amount of time that the IntelliGain
system must be corrected to before
a correction SNMP trap is sent to VistaLINK
®
. For example, if this control is set to 10 seconds, it means
that the IntelliGain
output level fault must be corrected for a minimum of 10 seconds before a correction
alarm is sent to VistaLINK
®
. This control is primarily used to smooth out alarming for audio with a very
wide dynamic range. The
Clear Duration
has a range of 0.5 sec to 240 seconds.
6.50.7. Program x Monitor
6.50.7.1. Input Loudness Monitor
The
Input Loudness
control will provide a real time value of the calculated input loudness value. This
control is used for monitoring purposes only.
6.50.7.2. Gain Applied Monitor
The
Gain Applied
control will provide a real time value indicating the amount of gain being applied by the
IntelliGain
system. Values can be either negative, indicating a gain reduction, or positive, indicating gain
is being applied.
6.50.7.3. Output Loudness Monitor
The
Output Loudness
control will provide a real time value of the calculated output loudness value. This
control is used for monitoring purposes only. It is used to provide confidence monitoring.