122
4000 X-Series Oscilloscopes Advanced Training Guide
4
Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
31
Set the scope’s timebase to
10.00 ms/div
.
32
Press the
[Search]
front panel key.
33
Tap the
Search Edge
softkey; then select
Serial 1 (I
2
S)
.
34
Tap the
Audio Left
softkey and change to
Audio Right
.
35
Tap the
Search for
softkey; then select
> (Greater than)
.
36
Tap the
Data
softkey twice; then type in
10
.
The white triangles near the top of the waveform area mark the time location of
each “found” occurrence of our search operation as shown in
. These
frames are also marked in orange in the first/pointer column of the lister table.
Your scope should have found and marked approximately 20 occurrences of this
search operation based on a total acquisition time of 100 ms. Note that the
number of “found” events is indicated near the bottom of the display. To
automatically navigate to right-channel data byte > +10, press the
and
front panel navigation keys.
Let’s now use the scope’s Segmented Memory mode of acquisition to capture 100
consecutive occurrences of I
2
S serial bus traffic when right-channel > +10. But to
complete the rest of this lab your scope must be licensed with the Segmented
Memory option.
Figure 82
Automatic Search & Navigation on I
2
S data.
