Teledyne Lecroy Frontline BPA 600, Hardware And Software User Manual, Page: 163 / 348

4.3.4.14 Discontinuities
A discontinuity is when the timestamp going from one packet to the next either goes backward by any
amount or forward by more than 4.01 s. This value is used because the largest possible connection
interval in
Bluetooth low energy is 4.0 s. A discontinuity is drawn as a vertical dashed line. A discontinuity
for a timestamp going backward is called a negative discontinuity and is shown in red. A discontinuity for a
timestamp going forward by more than 4.01 s is called a positive discontinuity and is shown in black. A
positive discontinuity is a cosmetic nicety to avoid lots of empty space. A negative discontinuity is an
error.
Figure 4.67 - A negative discontinuity.
Figure 4.68 - Three positive discontinuities.
4.3.4.15 Viewport
The viewport is the purple rectangle in the
Throughput Graph
. It indicates a specific starting time,
ending time, and resulting duration, and is precisely the time range used by the
Timeline
. The packet
range that occurs within this time range is shown above the sides of the viewport.
TELEDYNE LECROY Chapter 4 Capturing and Analyzing Data
155 Frontline BPA 600 Hardware & Software User Manual