RTW SurroundMonitor 11900 Series, Manual, Page: 336 / 376

9 | Menu | 9.10 | Alarm Configuration: The Global Alarm Setting Menu EN-146 SurroundMonitor 11900 Series
Alarms General settings
• On/Off
With these option boxes the alarm functions can be acti-
vated (
On
) or deactivated (
Off
).
When the alarm functions are activated the preset
threshold levels are marked with small triangles right besi-
de the bargraphs of the peakmeter. The identified events
are displayed in the display areas of the
Digital Over
in-
dicator for each channel without any weighting. The alarm
events also can be output via the outputs of the
GPIO
interface (see
conncetion
chapter).
• Output Signal Timing
This combo box is used for the selection of the time pe-
riod of the display or output impulse activated when an
alarm event is identified.
• Selecting 0.1 , 0.5 , 1 , 2 or 4 defines the time period in
seconds in which the event output is active. It remains
active after the selected time period has passed
when the conditions for the alarm event are still or
again complied.
• Selecting
Hold
defines the active state to be kept
until a reset with the
Reset
button/key
2
of the
PPM
instrument resp. button/key
4
of the Loudness Meter
(see corresponding chapters further ahead) is made.
• Selecting
Event
keeps the output active as long as
the condition for the alarm event is complied.
With the Alarm-Event Type Selection combo boxes
(see below) the several impulse types of each channel of
the selected mode can be routed to the corresponding
outputs.
• Output Logic
This combo box defines the logical state of the active
event outputs. Available options:
Active Low
and
Active
High .
Alarms Threshold settings
• Analog Threshold Over Alarm
This list box is used for setting the Over level threshold in
dBu. Exceeding this threshold will activate the alarm event
Over
for the time period selected in the
alarms Timing
section.
Values b18 dBu and –55 dBu can be selected
in 0.5 dB steps.
• PML
This check box activates the Permitted Maximum Level
function (“0 dB”). The alarm event
Over
will be activated
when the PML value of the displayed peakmeter is excee-
ded. This value depends on the current scale (see
Multi
channel mode example in figured). With the PMl check
box activated, the selected value for
analog Threshold
Over Alarm
has no effect, this list box is hided.
• Analog Silence Alarm
This list box is used for setting the
Silence
level threshold
in dBu. A signal falling below this threshold will activate
the alarm event
Silence
for the time period selected in
the alarms Timing section (see next chapter).
Values between 0 dBu and –60 dBu can be selected in
0.5 dB steps.
NOTE -
The threshold value is indicated in dBu as
absolute level. The setting of the
analog Metering Re-
ference Level Offset
list box on the
Reference Levels
menu page has no effect on the supplied threshold values.
• Digital Threshold Over Alarm
This list box is used for setting the Over level threshold
in dBFS. Exceeding this threshold will activate the alarm
event “Over” for the time period selected in the
alarms
Timing
section (see next chapter).
Values between 0 dBFS and –55 dBFS can be selected
in 0.5 dB steps.
• Headroom
With this check box enabled, the alarm event “Over” will
be activated when the Headroom value of the displayed
peakmeter is exceeded. With the
Headroom
check box
activated, the selected value for
Digital Threshold Over
alarm has no effect, this list box is hided.
• Digital Silence Alarm
This list box is for setting the Silence level threshold in
dBFS. Falling below this threshold will activate the alarm
event “Silence” for the time period selected in the
alarms
Timing
section (see next chapter).
Values between –10 dBFS and –55 dBFS can be selec-
ted in 0.5 dB steps.