Tektronix TDSUSB2, Manual

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Reference
Settings for the supported Instruments
This section gives a list of default oscilloscope settings the application uses for
supported instruments.
The recommended voltage probes for single-ended signals are the P6245,
TAP1500 probes and for differential signals is the P6248 probe. The next table
shows the oscilloscope settings for Low Speed and Full Speed signals for the
supported instruments.
Upstream Setups for Low Speed signals
Table 37. Oscilloscope settings for low speed signals
Ch. Vertical Setup Pos.
Scale Offset Coupling
Horizontal Setup Record
Main Trigger Length
Scale Position
Trigger Setup Trigger Logic Pattern Threshold
Trigger Type Function Limit Mode
Repeat
State
Ch1(D-) 0 1V 0 DC 5000 2.00 E-
07s
74% Logic AND >100 ns 800 mV Normal Off
Ch2(D+) 0 1V 0 DC N/A N/A N/A N/A N/A N/A 800 mV N/A N/A
Ch3
Qualify 0 1V 0 DC N/A N/A N/A N/A N/A N/A 2.7 V N/A N/A
Upstream Setups for Full Speed signals
You can test the Full Speed devices at Tier 6. This testing is also known as
legacy testing.
When Full Speed and Low Speed device are High Speed capable, the application
uses the signal rate limits of Full Speed/Low Speed devices that are not High
Speed capable to determine PASS or FAIL.
Table 38. Oscilloscope settings for full speed signals
Ch. Vertical Setup Pos.
Scale Offset
Coupling
Horizontal Setup
Record Main Trigger
Length Scale Pos.
Trigger Setup Trigger Logic Pattern
Threshold
Trigger Type Function Limit Mode
Repeat
State
Ch1 (D-)
0 1V 0 DC 5000 25 E-9s 83% Logic AND >100 ns 800 mV Normal Off
Ch2 (D+) 0 1V 0 DC N/A N/A N/A N/A N/A N/A 800 mV N/A N/A
Ch3
Qualify 0 1V 0 DC N/A N/A N/A N/A N/A N/A 2.7 V N/A N/A
176 TDSUSB2 Universal Serial Bus Measurement Package