Tektronix TDSUSB2, Manual

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Operating Basics
Configure Limits
The application displays the maximum and minimum values for the selected
tests. You can use the ‘>’ sign on the keypad to configure limits for these
options.
Table 7. Configure limits description
Option Description
Set Sets the values you enter
Default Restore the default values
Cancel Cancels all the changes you enter
Note: The application enables the Configure Limits values when you select the
option File> Preferences> Advanced menu.
Configuring Signal Quality Measurements
To access the Measurement: Configure, go to Measurements> Configure. Be sure
to select the relevant measurements before you configure them. There are two
tabs for the Signal Quality Measurements: Configure and Source.
The Configure tab allows you to select and set the Tier, Signal Direction and the
Test Point options. You must select the Tier (Tier 1 through 6), the direction of
signal (Upstream or Downstream) and the Test Point (Near End or Far End) at
which the unit will be tested.
For Low Speed and High Speed signals, you can set Test Point to Near End or
Far End. For Full Speed signals, you can set the Test Point to Far End only.
For Rise Time, Fall Time, and Monotonic Property, you can configure the
measurement levels.
The Source tab allows you to select the Source of the signal: a live signal or the
signal from a file. For a live signal there are two options: Differential and Single-
Ended. For Low Speed and Full Speed devices, you can test only single-ended
signals (D+ and D–). For High Speed devices, it is recommended that you use a
differential probe.
TDSUSB2 Universal Serial Bus Measurement Package 35