Technical data

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

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

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

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

S signals.