Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
4000 X-Series Oscilloscopes Advanced Training Guide
119
You should now see three digital waveforms captured by the scope’s digital
channels of acquisition similar to
. These I
2
S training signals are being
generated by the scope’s built-in pattern generator and routed directly to the
scope’s digital acquisition system; bypassing the logic probe. Note that in a real
measurement application such as this, you would use the scope’s analog inputs
and/or logic probe to capture these signals from your system.
D9 is the audio serially encoded data signal (SDATA), D8 is the serial clock signal
(SCLK), and D7 is the Word Select signal (WS). Let’s now set up the scope to
decode these I
2
S signals.
12
Press the
[Serial]
front panel key.
13
Tap the
Mode I
2
C
softkey; then select
I
2
S
.
14
Tap the
Signals
softkey.
15
Tap the
SCLK
softkey; then select
D8
as the clock source by double-tapping it in
the menu.
16
Tap the
WS
softkey; then select
D7
.
17
Tap the
SDATA
softkey; then select
D9
.
18
Press the (Back) front panel button to return to the previous menu.
Figure 79
Capturing I
2
S signals using the scope’s digital channels of acquisition (MSO).
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