Tektronix TDSUSB2, Руководство пользователя

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Reference
Full Speed
Table 32. Full Speed measurements
USB Limits User Configure Limits References*
Measure-ments Max Min Max range Min range
Cross-Over
Voltage 2.0 V 1.3 V 1.6-2.4 V 1.04-1.56 V Chapter 7, Table 7-7,
Section 7.1.2.1
Signal Rate 12.03 Mbps 11.97 Mbps 12.15 to 14.8
Mbps
9.48-11.85
Mbps
Chapter 7,7.1.13.1
Consecutive Jitter <2 ns N/A 1.6-2.4 ns N/A Chapter 7, 7.1.13.1
Paired Jitter <1 ns N/A .8-1.2 ns N/A Chapter 7, 7.1.13.1
Rise Time 20 ns 4 ns 16-24 ns 3.2-4.8 ns Chapter 7, 7.1.2.1
Fall Time 20 ns 4 ns 16-24 ns 3.2-4.8 ns Chapter 7, 7.1. 2.1
EOP Width 175 ns 160 ns 140-210 ns 128-192 ns Chapter 7, 7.1.13.2.1
References Section refers to the chapter numbers in the ‘Universal Serial Bus
Specifications Revision 2.0-2000’.
Note 1: Results within the USB limits lead to a PASS. Results within the waiver
limits, but outside USB limits lead to a Conditional PASS. Results within the user
configured limits lead to a PASS result. If you select configured limits, you can
view only the result details.
Note 2: Testing at Tier 6 leads to a PASS. Testing at Tier 5 and 4 leads to a
Conditional PASS that is a Pass within the waiver limits. Testing at Tier 1 to 3
leads to a FAIL.
Note 3: The application uses the USB signal rate limits of Low Speed or Full
Speed devices that are not capable of High Speed. The same limits for Low Speed
or Full Speed that are High Speed capable to decide the result - PASS or FAIL.
TDSUSB2 Universal Serial Bus Measurement Package 167