10 Serial Decode/Lister
326 InfiniiVision Oscilloscopes User’s Guide
If you have connected one of the oscilloscope’s digital source channels to the
Clock signal (this applies to MSO model oscilloscopes only): Press the [D15-D0]
key and select Thresholds to set an appropriate threshold level for digital channels.
e Press the rising or falling edge softkey to specify the edge that the clock occurs on.
f Press the Data softkey, and use the Entry knob to select the channel probing the
data signal.
g If you have connected one of the oscilloscope’s analog source channels to the Data
signal: Adjust the trigger level for the selected analog channel to the middle of the
waveform by turning the Trigger Level knob.
If you have connected one of the oscilloscope’s digital source channels to the Data
signal (this applies to MSO model oscilloscopes only): Press the [D15-D0] key and
select Thresholds to set an appropriate threshold level for digital channels.
h Repeatedly press and release the Frame by softkey to select the method used to
identify frames:
• ~CS - Not Chip Select — an active low chip select signal.
• CS - Chip Select — an active high chip select signal.
• Clock Timeout — clock idle for a period of time.
i If you chose framing by chip select or not chip select, press the CS or ~CS softkey,
and use the Entry knob to select the channel probing the chip select signal.
If you have connected one of the oscilloscope’s analog source channels to the Chip
Select signal: Adjust the trigger level for the selected analog channel to the middle
of the waveform by turning the Trigger Level knob.
If you have connected one of the oscilloscope’s digital source channels to the Chip
Select signal (this applies to MSO model oscilloscopes only): Press the [D15-D0]
key and select Thresholds to set an appropriate threshold level for digital channels.
j If you chose framing by clock timeout, press the Timeout softkey and use the Entry
knob to specify the idle time.
3 Press the up-arrow softkey to return to the previous menu. Press the Word Size
softkey, and use the Entry knob to select the number of bits in a word.
4 If the decode line does not appear on the display, press the Decode softkey to turn it
on.
5 If the oscilloscope is stopped, press the [Run/Stop] key to acquire and decode data.
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