5 Test Speci
fi
cation
5.1 Test Coverage
The Advanced Cable Tester contains several types of analysis circuitry for testing the
di
ff
erent types of pins. With the exception of the lower-speed USB2 pins, a given pin type
is not tested by multiple analysis circuits. The tests have been carefully selected to
provide test coverage, while not increasing system cost of impacting accuracy.
Pin Groups
VBUS, GND:
Tested using power pin tester.
CC, VCONN:
Tested using a Type-C port controller.
SSTX1, SSTX2, SSRX1, SSRX2:
Tested using signal integrity circuit.
SBU1, SBU2, SHIELD:
Tested using simple digital testing.
USB2 D+/D- pair:
Tested using both digital tester
and
signal integrity circuit.
5.2 Test Sequence
The Advanced Cable Tester uses multiple phases to test the cables that are put under
test. The phases are generally measurement of the various cable parameters followed by
evaluation of the results for pass/fail criteria established by the selected pro
fi
le and the
speci
fi
cations of the USB Type-C Speci
fi
cation. The
fi
rst phase is a safety test stage
where the cable is evaluated for shorts and mis-wires that are deemed to be safety
issues; the second phase measures all the parameters of the cable; and the
fi
nal phase
takes all of the measured parameters and evaluates them against the requirements for
the cable under test. At the completion of the third phase, the web interface is updated
with the result and the information is available for further use by the end-user.
5.2.1 Test Phases
Test Phase 1
1. The
fi
rst phase encompasses the Safety Test part of the test sequence. The
following items are checked during this phase.
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