Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
3000 X-Series Oscilloscopes Advanced Training Guide
83
39
Press the
Bits
softkey.
40
Press the
Select Digit
softkey; then select the upper nibble (left- most
nibble).
41
Press the
Hex
softkey; then turn the Entry knob to select
0
.
42
Press the
Select Digit
softkey; then turn the Entry knob to select lower
nibble (right- most nibble).
43
Press the
Hex
softkey; then turn the Entry knob to select
3
.
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 200 ms. Note that the number of “found” events is
indicated near the bottom of the display. To automatically navigate to each
MOSI byte = 03
HEX
, press the
and
front panel navigation keys.
Let’s now use the scope’s Segmented Memory mode of acquisition to
capture 500 consecutive occurrences of SPI serial bus traffic when MOSI =
03
HEX
. But to complete the rest of this lab your scope must be licensed
with the Segmented Memory option.
44
Push the horizontal position/delay knob to re- position the trigger point
back to center- screen.
45
Set the scope’s timebase to
200.0 µs/div
.
Figure 58 Automatic Search & Navigation on SPI traffic.