Teledyne Lecroy Frontline BPA 600, Hardware And Software User Manual, Page: 212 / 348

Test Mode Severity Event Description
Non-
Referenced
Warning Glitch Extremely large sample-to-sample audio
amplitude transitions
1
that have little probability
of occurring within natural speech or music. Such
dramatic changes would typically happen only in
situations of dropped samples.
Referenced Info TestID Found Occurs when a valid Test ID
2
has been
recognized. A valid Test ID must meet the level,
frequency, duration, and delimiter requirements. If
any of these parameters do not match, the process
is terminated and is reset to the initial conditions.
Until a Test ID is successfully recognized, the
system will continue to operate in Non Referenced
Mode; therefore, no events related to false starts
are reported. This is because for arbitrary audio
there is no expectation of any Test ID.
Referenced Warning Test Script Not
Found Occurs if a valid Test ID was found , but the script
for that Test ID was not found. The system reverts
to Non-Referenced Mode if this happens. This
event should not occur if using a valid Reference
Audio file provided by Frontline.
Referenced Error Invalid Test Script This event is generated when an error occurs while
accessing information in a script. This event
should not occur if using a valid reference audio file
provided by Frontline.
Referenced Error Synchronization
Lost Generated when after a successful TestID
recognition the system encounters unexpected
frequencies or durations of audio segments while
analyzing a received Reference Audio file. If this
situation occurs, the internal segment tracking
logic attempts to look forward and/or backward in
the test script to determine if the currently
measured characteristics are consistent with the
previous or next segment of the script. If there is a
match, the internal segment pointer is advanced or
retarded appropriately, the Synchronization Lost
event is not generated, and the audio analysis
continues. However, if a match cannot be found,
the system declares itself out of sync and
generates the Synchronization Lost Event,
terminates any active test script, and reverts to
Non-Referenced Mode.
Table 4.24 - Event Type: Audio(continued)
1
Glitch sample-to-sample audio amplitude transitons: Speech: greater than 40 dB change Music: greater than 90 dB
change
2
A “Test ID” is three digits minimum in length, representing a dot notation “N.vv” Test Identifier. The Value ‘N’ may be
any length >= 1 indicating a specific test number, and “vv” represents a two digit version. Each digit is represented by a
tone between 200 and 290 Hz, and is followed either by a 1 kHz delimiter tone or a 400 Hz Test ID terminator. The digit
‘0’ is represented by 200 Hz, the digit ‘1’ by 210 Hz, and so on, up to the digit ‘9’ represented by 290 Hz.
Chapter 4 Capturing and Analyzing Data TELEDYNE LECROY
Frontline BPA 600 Hardware & Software User Manual 204