Agilent Technologies InfiniiVision DSO6014L, Руководство пользователя

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182 6000 Series Oscilloscope User’s Guide
4 Triggering the Oscilloscope
4 Press the Data softkey or turn the Entry knob to select the
channel that is connected to the SPI serial data line. (If the
channel you selected is off, switch it on.)
As you press the
Data
softkey (or rotate the Entry knob on
mixed-signal oscilloscopes), the DATA label for the source
channel is automatically set and the channel you select is
shown in the upper-right corner of the display next to “
SPI ”.
Adjust the trigger level for the selected analog channel by
turning the Trigger Level knob. Press the
D15 Thru D0 key and
select Thresholds to set the threshold level for digital
channels. The value of the trigger level or digital threshold is
displayed in the upper-right corner of the display.
5 Press the Frame by softkey to select a framing signal that the
oscilloscope will use for determining which clock edge is the
first clock edge in the serial stream.
Graphic showing
current state of SPI
trigger clock slope and
chip select polarity or
timeout selection
Labels automatically
set for clock, data,
and chip select
signals