User`s guide

3-37

Triggering the Oscilloscope

To use SPI triggering

Serial Peripheral Interface (SPI) trigger setup consists of connecting the

oscilloscope to a clock, data, and framing signal. You can then trigger on a data

pattern during a specific framing period. The serial data string can be specified

to be from 4 to 32 bits long.

When you press the Settings softkey, a graphic will be displayed showing the

current state of the frame signal, clock slope, number of data bits, and data bit

values. Press the Signals softkey in the Settings menu to see the current source

channels for the clock, data, and frame signals.

•Press the More key in the Trigger section of the front panel, rotate the

Entry knob until

SPI is displayed in the Trigger softkey, then press the

Settings softkey to display the SPI trigger menu.

Assign

channels

# data bits

in string

Data bit

select

Set all

data bits

to value

Trigger level

or threshold

Currently selected Clock,

Framing, or Data channel

SPI trigger

Return to

previous menu

Data bit

value

Data string

values

Graphic showing

current state of the

SPI trigger setup