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Character Only - The analyzer shows both the number (hex, binary, etc.) data and the
character (ASCII, EBCDIC or BAUDOT) data on the same screen. If you do not wish to see
the hex characters, click on the Character Only button. Click again to go back to both number
and character mode.
Number Only - Controls whether the analyzer displays data in both character and number
format, or just number format. Click once to show only numeric values, and again to show
both character and numeric values.
All Events - Controls whether the analyzer shows all events in the window, or only data bytes.
Events include control signal changes and framing information.
Timestamping Options – Brings up the timestamping options window which has options for
customizing the display and capture of timestamps.
4.4.3 Opening Multiple Event Display Windows
Click the
Duplicate View
icon
from the
Event Display
toolbar to open a second
Event Display
window.
You can open as many
Event Display
windows as you like. Each
Event Display
is independent of the others
and can show different data, use a different radix or character set, or be frozen or live.
The
Event Display
windows are numbered in the title bar. If you have multiple
Event Displays
open, click on
the
Event Display
icon
on the
Control
window toolbar to show a list of all the
Event Displays
currently
open. Select a window from the list to bring it to the front.
4.4.4 Calculating CRCs or FCSs
The cyclic redundancy check (CRC) is a function on the
Event Display
window used to produce a checksum. The
frame check sequence (FCS) are the extra checksum characters added to a frame to detect errors.
1. Open the
Event Display
window.
2. Click and drag to select the data for which you want to generate a CRC.
3. Click on the
CRC
icon
.
4. In the
CRC
dialog box, click on the down arrow to show the list
of choices for CRC algorithms. Choose an algorithm to use. Choose
CRC 32 (Ethernet). Choose CRC 32 (Ethernet) for Ethernet data or
the appropriate CRC type for serial data.
5. Enter a
Seed
value in hexadecimal if desired.
6. Click
OK
to generate the CRC. It appears in the byte information
lines at the bottom of the Event Display window. Whenever you
select a range of data, a CRC using the algorithm you selected is
calculated automatically.
Calculating CRC for interwoven data
Chapter 4 Capturing and Analyzing Data
TELEDYNE LECROY
Frontline 802.11 Hardware & Software User Manual
133
Содержание Frontline 802.11
Страница 1: ...Hardware and Software User Manual Revision Date 12 14 2016 ...
Страница 24: ...18 Frontline 802 11 Hardware Software User Manual TELEDYNE LECROY Chapter 2 Getting Started ...
Страница 52: ...46 Frontline 802 11 Hardware Software User Manual TELEDYNE LECROY Chapter 3 Configuration Settings ...
Страница 154: ...148 Frontline 802 11 Hardware Software User Manual TELEDYNE LECROY Chapter 4 Capturing and Analyzing Data ...
Страница 204: ...198 Frontline 802 11 Hardware Software User Manual TELEDYNE LECROY Chapter 7 General Information ...
Страница 205: ...Appendicies Appendix A Application Notes 200 Frontline 802 11 Hardware Software User Manual 199 ...
Страница 207: ...Appendicies TELEDYNE LECROY Frontline 802 11 Hardware Software User Manual 201 ...
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