Teledyne Lecroy Frontline BPA 600, Hardware And Software User Manual, Page: 215 / 348

Test Mode Severity Event Description
Referenced Info End of Test Event Reported to indicate that the system has
completed processing a test script for a Reference
Audio file, and that the system has exited
Reference Mode. This event is generated when
the elapsed time from the start of test is equal to or
greater than the scripted duration of a test. It is
reached when the number of samples processed
equals the number of samples associated with the
test duration.
Table 4.24 - Event Type: Audio(continued)
Clipping
The number of consecutive samples needed to qualify as a clipping event depends on both sample rate and
number of bits per sample. Table 1 specifies the number of consecutive samples at the maximum value level
that will generate a Clipping event.
Consecutive Samples Sample Rate, Samples/sec Resolution, bits
3 8000 16
5 16000 16
11 41000 16
2 64000 16
12 48000 16
24 96000 16
Table 4.25 - Clipping Event Thresholds
Consecutive Samples Sample Rate, Samples/sec Resolution, bits
3 8000 16
5 16000 16
11 41000 16
2 64000 16
12 48000 16
24 96000 16
Table 4.26 - Clipping Event Thresholds
Dropout
Dropout events are reported when the average audio level (RMS) is initially above the Measurement
Threshold, then falls below the Silence Threshold, and then quickly rises above the Measurement Threshold
again ). This approach largely disqualifies the natural inter-syllable silence and pauses that occur in natural
speech, but will detect gaps caused by dropped data. Note that the system does not report dropouts that
begin at very low energy levels.
Figure 4.122 - Dropout: Measurement and Silence Threshold
Glitch
TELEDYNE LECROY Chapter 4 Capturing and Analyzing Data
207 Frontline BPA 600 Hardware & Software User Manual