Tektronix 4000 Series Manual

Tektronix 4000 Series Oscilloscopes
USB Bus Demo
1

Install a DPO4USB application module in an
MSO/DPO4000 Series oscilloscope

Connect two P6139A passive probes (for
Low-Speed and Full-Speed USB) to
oscilloscope channels 1 and 2,
or connect a TDP1000 differential probe (for
High-speed USB) to channel 1

Press Default Setup button

Set Record Length to 1M points
Demo Notes
Demonstrate how the oscilloscope can trigger
on LS and FS USB packet level content and
decode the entire acquisition. Show how a
MSO4104 or DPO4104 can decode an entire
HS USB acquisition after triggering on an edge.
Show how to look at each packet with Wave
Inspector Pan/Zoom control.
Demonstrate how easy it is to view an entire
acquisition as an event table.
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2a
Low-speed and Full-speed
USB Bus Setup

Connect channel 1 to D+ and channel 2 to D-,
and turn on channel 2

Set Vertical Scales to 2 V/div and position
waveforms in upper half of display
Set Horizontal Scale to 100 s/div


Set Trigger Level to about 1.4 V

Press B1 button and set Bus Type to USB

Press Define Inputs and select appropriate
USB speed and single-ended inputs

Set Threshold values to 1.4V

Set Trigger Type to Bus

Set Trigger On to Sync

Press Menu Off button

Press Single button
3
Wave Inspector – Pan/Zoom

Adjust inner control to zoom in on a single
decoded packet of data

Adjust outer control to position the zoomed
area to display the decoded information
Demo Training Fact Sheet
2b
High-speed USB
Bus Setup
(requires 1 GHz model)

Connect + input to D+ and – input to
D-

Set Vertical Scale to 250 mV/div and
position in upper half of display
Set Horizontal Scale to 10 s/div


Set Trigger Level to about -100 mV

Press B1 button and set Bus Type to
USB

Press Define Inputs and select
appropriate High-speed USB

Set High Threshold to +100 mV and
set Low Threshold to -100 mV

Press Menu Off button

Press Single button
4
USB Bus Event Table
Demo

Press B1 button
Set Display As > Event Table to On

Multipurpose control a scrolls
through Event Table messages