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20 Notes on USB Electrical Compliance Testing
2 Preparing to Take Measurements
Required Equipment and Software
The following tables list the required test equipment and the tests for
which they are required.
Oscilloscope, Software, and Accessories
Table 1 Digital Storage Oscilloscope, Software, and Accessories
Equipment Required
TESTS
Host
Hi-Speed
Hub
Hi-Speed
Device
Hi-Speed
Low/Full
Speed
Agilent 5485xA, 9000A or 80000 or 90000A Series Infiniium oscilloscope.
1
*,†
1
a,b
1
a,b
1
a,b
Agilent N5416A USB Compliance Test Option. 1111
Computer monitor (optional). optional optional optional optional
Agilent 1131A, 1133A, or 1134A InfiniiMax differential probe. 121n/a
Agilent E2669A differential connectivity kit, OR E2678A socketed head.121n/a
Agilent header adapter (P/N 01131-68703), included with E2669A and
E2678A purchased after October, 2003.
1
‡
2
c
1
c
n/a
Agilent E2697A 1 Mohm adapter with passive probe, OR 1156A, 1157A, or
1158A active probe.
222
3
**
Agilent E2697A high impedance converter, N2774A current probe, and
N2775A power supply.
n/a n/a n/a
1
d
Agilent 8710-2063 dual lead adapter (3 units) - to be used with the 10073C passive probe
* The oscilloscope’s memory upgrade option is recommended (Option 001 when ordered with the oscilloscope, or after
purchase: E2680A for the 5485xA Series oscilloscopes, or N5404A for the 80000 and 90000A Series oscilloscopes). This
gives the automated test software more flexibility in making corner case measurements (and improves test performance).
† The enhanced bandwidth software option is recommended for the Agilent 54855A oscilloscope (Option 008), and the noise
reduction software option is recommended for the 80000 and 90000A Series oscilloscopes (Option 005 when ordered with
the oscilloscope or N5403A after purchase). This reduces the bandwidth of the oscilloscope to just what is required by the
USB-IF (2 GHz for USB 2.0), which can greatly reduce system measurement noise, allowing the maximum measurement
margin.
‡ For low/full speed testing, the Agilent 54831B/D or 54832B/D Infiniium oscilloscope with 1165A passive probes and 1147A
current probe can be used instead.
**The header adapter is not needed with hi-speed test fixtures (E2649-66401 through E2649-66405).