Agilent Technologies 4000 X Instrukcja Obsługi Pobierz pdf (Strona 119)

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

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

S signals.

12 Press the [Serial] front panel key.

13 Tap the Mode I

C softkey; then select I

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

S signals using the scope’s digital channels of acquisition (MSO).

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Agilent Technologies 4000 X Instrukcja Obsługi Strona 119