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Page 90 OmniTek XR User Guide, Software Release 2.3
The display is created by comparing in real time the audio levels in the data stream
against a series of thresholds set in the Configuration dialogue (see below) The basic
Red, Yellow, Green colouration shows in traditional fashion how the output compares
with Permitted Maximum and Alignment reference levels (also set within the
Configuration dialogue), the level of which are indicated by diamonds alongside the
channel displays.
Further, if the output in any of the monitored channels exceeds the specified Clip level,
this is recorded by showing the word ‘CLIP’ as an in-bar message on the appropriate
channel of the display. Similarly if the output falls below the specified Mute level, the word
‘MUTE’ is added to the appropriate channel. Similar messages appear where the output
exceeds the Over level or falls below the Silence level.
Channels that don’t contain any audio are shown as grey.
As the input data stream is processed, Peak Hold lines may appear on the PPMs,
configurable to show either the maximum value attained over a period of 1 second or
over the whole test (see below). These maximum levels may also be recorded in the
Event Log (see page 104), together with details of the minimum and average audio
levels.
Another feature of the display is that one of the channel pairs may be shown highlighted
(as in the above illustration). This highlighting indicates that the pair is the one currently
selected as the source either for playback (see page 103) or for Lissajous figure display
(see page 103) or for Dolby-E analysis (see page 94). A different channel pair may be
selected simply by clicking on the required pair.
The display is readily configurable to emulate a range of meter formats in use across the
industry. These different meter formats are associated with particular graticules,
reference levels, alarm trigger points and meter ballistics. Again, this is an aspect of the
configuration carried out through the Configuration dialogue described below.
Group and
Pair labels
A
udio Source
and Metering type
In-bar message
Permitted Maximum
reference level
A
lignment
reference level
Peak Hold markers
Highlighting indicating
selection as pair
for playback/
Lissajous figure/
Dolby-E analysis
Group and
Pair labels
A
udio Source
and Metering type
In-bar message
Permitted Maximum
reference level
A
lignment
reference level
Peak Hold markers