Figure 4.78 - Vertical blue lines are
Bluetooth
slot markers
1. Drag one of the sides of the
Throughput Graph
viewport.
2. Select a zoom preset from the
Zoom
or right-click menus.
3. Select the
Zoom In
or
Zoom Out
button or menu item.
4. Turn the mouse wheel in the
Timelines
or the
Zoomed Throughput Graph
while the zoom
cursor is selected. The action is the same as selecting the
Zoom In
and
Zoom Out
buttons and
menu items except that the time point at the mouse pointer is kept in place if possible.
5. Select the
Zoom to Data Point Packet Range
menu item, which zooms to the packet range
shown in the most recently displayed tool tip.
6. Select the
Zoom to Selected Packet Range
menu item, which zooms to the selected packet
range as indicated in the
Selected Packets
text in the timeline header.
7. Select the
Custom Zoom
menu item. This is the zoom level from the most recent drag of a
viewport side, selection of
Zoom to Data Point Packet Range
, or selection of
Zoom to
Selected Packet
.
The zoom buttons and tools step through the zoom presets and custom zoom, where the custom zoom is
logically inserted in value order into the zoom preset list for this purpose.
(Click here to see a Timeline Discontinuities video...)
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 cross-hatched area one
Bluetooth
slot (625 µs) in width. 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.
TELEDYNE LECROY
Chapter 4 Capturing and Analyzing Data
114
Frontline BPA low energy Hardware & Software User Manual
Summary of Contents for BPA LOW ENERGY
Page 1: ...Hardware and Software User Manual Revision Date 1 3 2017...
Page 222: ......
