Teledyne Lecroy Frontline BPA 600, Hardware And Software User Manual, Page: 207 / 348

SegmentID Frequency, Hz Start Time, sec. Duration, sec.
32 800 2.800 0.100
35 1120 3.100 0.100
40 400 4.300 0.900
Table 4.20 - Test 1.02 -6 dBFS Segments
These -6 dBFS segments are described in
the Test 1.02 -6dBFS Segments table .
These segments serve as a convenient
and quick visual indicator that levels are
appropriate, especially the longer 3rd
case which is evident at the 4.999 second
reference time of the above image(a little
over 2/3 of the way through the test).
The first 0.500 seconds of Test 1.02, which contains the Test ID value “1.02” is shown below. The three digits
‘1’, ‘0’, and ‘2’ are represented by the low frequencies 210Hz, 200Hz, and 220Hz, respectively, which are 100
milliseconds in duration, and are separated by 1 kHz digit delimiters of 50 milliseconds duration. The final tone
is a 100 millisecond segment at 400 Hz, defined as a “Test ID Terminator”. Note that since the levels of all of
these tones are at exactly -3 dBFS, the peak levels should be exactly halfway between any available -6 dBFS
(50%) gridline.
Figure 4.121 - Test 1.02 Test ID Segment
The three digits ‘1’, ‘0’, and ‘2’ are represented by the low frequencies 210 Hz, 200 Hz, and 220 Hz,
respectively, which are 100 ms in duration, and are separated by 1 kHz digit delimiters of 50 ms duration. The
final tone is a 100 ms segment at 400 Hz, defined as a “Test ID Terminator”. Note that since the levels of all of
these tones are at exactly -3 dBFS, the peak levels -3 dBFS.
The value in the Info1 parameter of the “Test ID Found” event is optimally the value 23196 and may be
converted to dBFS by the relationship
.
Optionally the value can be interpreted as “Channel Gain” via the relationship
.
Format Application Maximum Minimum
Integer Speech 23196 5826
Music 23196 3297
Level Speech -3 dBFS -15 dBFS
Music -3 dBFS -20 dBFS
Chanel Gain Speech 0 dB -12 dB
Music 0 dB -17 dB
Table 4.21 - "Test ID Found" Event "info1"
Maximum and Minimum Values
This table indicates the maximum and minimum
acceptable levels for the “Test ID Found” Info1
parameter in integer form, decibel level in dBFS,
and Channel Gain in dB.
Example 1 : For the case where the Info1 parameter
is converted to “Channel Gain”, if the audio is
speech (i.e. transported via a SCO channel), then a
value of -11.9 dB is acceptable, and a value of -12.1
dB is not.
Example 2: For the case where the Info1 parameter
is converted to “Channel Gain”, if the audio is music
(i.e. transported via an A2DP connection), then a
TELEDYNE LECROY Chapter 4 Capturing and Analyzing Data
199 Frontline BPA 600 Hardware & Software User Manual