Agilent Technologies 4000 X Instrukcja Obsługi Pobierz pdf (Strona 90)

90 4000 X-Series Oscilloscopes Advanced Training Guide

4 Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs

24 Tap the Trigger Setup softkey.

25 Tap the Bit softkey and enter 0 in the keypad.

26 Tap the 0 1 X softkey to select 0 as the trigger logic condition for Bit 0

(MSB).

27 Tap the Bit softkey and enter 1 in the keypad.

28 Tap the 0 1 X softkey to select 0 for Bit 1.

29 Repeat Steps #27 and #28 until MOSI Data = 0000 0011.

Your scope should now be triggering on MOSI data = 03

HEX

with this byte

shown at center-screen similar to Figure 57. Let’s now capture a very long

stream of SPI traffic and then manually search through the captured and

decoded record.

30 Press the [Serial] front panel key.

31 Tap the Lister softkey; then set the Window menu to select Half-Screen.

32 Set the scope’s timebase to 20.00 ms/div.

33 Press [Run/Stop] to stop repetitive acquisitions.

Figure 57 Triggering on MOSI data = 03

HEX

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 167 168

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Agilent Technologies 4000 X Instrukcja Obsługi Strona 90