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Chapter 2 Establishing references for Loss & ORL measurements, without Switch
Table 5
Reference methods for Insertion Loss and ORL Testing
Recommendations
Loss principle
Factory References
Click on the
factory.
As soon as the icon
display returns automatically to Process page.
NOTE
Factory references guaranty measurement uncertainty of less than a 1dB for
IL and ORL, if all ports and connectors are cleaned and not damaged.
The following figure show the default values:
IL Loopback Reference
Method
Easiest process.
Not recommended for short
links.
One the reference is performed,
do not disconnect jumper from
the test port
Loss measurement includes link
connectors.
Adapter
Link under test
icon to fill the table with default reference values, measured at the
is pressed and the table filled with default reference value, the
User Manual
IL Side-by-side Two -Cord
Reference method
Most accurate reference method,
but both units must be at the same
location for the referencing pro-
cess.
Once the reference is performed,
do not disconnect jumper from test
ports
Loss measurement in-cludes one
link connector. To include both
connector add a reference grade
adapter cord (as recom-mended
in IEC standards).
Adapter
700MAN203 Rev. 007
Establishing References
15
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