Agilent Technologies InfiniiVision 3000 X- Series, Advanced Training Manual, Page: 107 / 128

Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
4
3000 X-Series Oscilloscopes Advanced Training Guide 107
20
Press the [Label] front panel key to turn on the scope’s default labels
for an I
2
S bus.
Your scope should now be decoding the left- channel and right- channel
audio data similar to
Figure 80 . However, the scope is not yet triggering
on these signals. The scope should be randomly auto triggering because
the default trigger condition is to trigger on a rising edge of channel- 1.
But there are no signals present on the channel- 1 input. Let’s now set up
the scope to trigger on I
2
S right- channel audio data as the value of the
data increases from
≤
- 10 to
≥
+10 (signed decimal format).
21 Press the
[Trigger]
front panel key; then select
Serial 1 (I
2
S)
using the
Entry knob.
22
Press the
Trigger Setup
softkey.
23
Press the
Audio Left
softkey; then change to
Right
.
24
Press the
Trigger =
softkey; then turn the Entry knob to select the
Increasing
value.
25 Press the
[Mode/Coupling]
key in the Trigger section of the front panel;
then select the Normal trigger mode.
Figure 80 Decoding I
2
S signals.