HEO
Horizontal Eye Opening is a percentage value that indicates what percentage
of the reference frame of the eye is open across the widest section. The
Expected is the minimum open percentage that will pass the test and is
generated based on the insertion loss curve speci
fi
ed in the test pro
fi
le. The
Measured is the actual percentage open.
VEO
Vertical Eye Opening is a percentage value that indicates what percentage of
the reference frame of the eye is open across the widest section. The
Expected is the minimum open percentage that will pass the test and is
generated based on the insertion loss curve speci
fi
ed in the test pro
fi
le. The
Measured is the actual percentage open.
Eye Image
If lock was achieved on the indicated di
ff
erential pair, the eye image will be
displayed. The eye image will include the mask to provide a reference for the
HEO and VEO values.
If lock was not achieved, a no-lock image will be displayed.
8.4.6 E-Marker
E-Marker tests check for the presence or absence of E-Marker chip(s) in USB Type-C
connectors. The Advanced Cable Tester v2 supports Power Delivery Speci
fi
cation,
Revision 2 (PD2) and Power Delivery Speci
fi
cation, Revision 3 (PD3). The presence/
absence test reports are grouped by PD speci
fi
cation and present the following
information:
Advanced Cable Tester v2 User Manual v2.0.0
46
