Technical data

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 Figure 79. 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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