Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
4000 X-Series Oscilloscopes Advanced Training Guide
97
Your scope should now be triggering on Tx = 4D
HEX
while displaying this byte at
center-screen similar to
. Let’s now set up the scope to capture a longer
record of time (2 seconds) and review our data in a “lister” format.
25
Set the scope’s timebase to
200.0 ms/div
.
26
Press
[Run/Stop]
to stop repetitive acquisitions.
27
Press the
[Serial]
front panel key.
28
Tap the
Lister
softkey; then select
Half-Screen
from the
Window
menu.
29
Tap the
Scroll Lister
softkey; then turn the Entry knob to scroll through the
decoded data.
As you scroll through the data, note that waveforms “track”. This means that the
frame that the arrow points to in the lister table corresponds to the waveforms that
are positioned at center-screen. If you want to zoom in on a particular
RS232/UART byte of data, tap the
Zoom to Selection
softkey. This particular stream
of RS232/UART data includes some infrequent parity errors (marked in red). But
locating the occasional parity bit error conditions can be difficult using the manual
scrolling method if the parity bit errors are very infrequent. So let’s now perform an
automatic search to find every occurrence of parity bit errors on both the Tx and Rx
data lines. We will then automatically navigate to each of these occurrences.
Figure 62
Triggering on Tx = 4D
HEX
.
Содержание 4000 X-Series
Страница 12: ...12 4000 X Series Oscilloscopes Advanced Training Guide 1 Getting Started...
Страница 156: ...156 4000 X Series Oscilloscopes Advanced Training Guide A Oscilloscope Block Diagram and Theory of Operation...
Страница 166: ...166 4000 X Series Oscilloscopes Advanced Training Guide B Oscilloscope Bandwidth Tutorial...
Страница 168: ...168 4000 X Series Oscilloscopes Advanced Training Guide C Related Keysight Literature...