EXFO MaxTester 630G User Manual page 114

Running DSL/IP Tests and Viewing Results
DSL Statistics
Sync loss count is the number of times the unit lost synchronization.
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Vector State for single VDSL2 connection mode is Active/Not Active
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and for G.fast mode is always Active. When Active, the VCE (vector
control entity) + DSLAM asks the CPE for noise samples. The VCE uses
the noise samples to calculate the level of FEXT (far end crosstalk) and
to calculate the solution to mitigate the effects of FEXT.
KL0 displays the attenuation that the system calculated during the
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determination of UPBO (Upstream Power Back Off) requirements as
an estimated electrical length of its loop.
EWL is the estimated wire length and is based on the KL0.
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Rate Adaptation mode (GVXAA and GVXAB models only) displays the
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following in Manual and Auto Test:
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Performance Counters - Local/Remote
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Note: The RTX_TX number may contain retransmits not requested by the receiver
(that is, the retransmission request channel got corrupted and a
retransmission was sent automatically) resulting in an incremental value
even though the same frame ID was retransmitted multiple times.
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SRA (seamless rate adaptation) which adjusts the rate according to
the current line conditions. Received and transmitted counters are
shown, for example SRA(DS/US).
FRA (fast rate adaptation) which enables rapid (<1 ms)
reconfiguration of the data rate. Received and transmitted
counters are shown, for example FRA(DS/US).
N/A means none used.
G.INP RTX_TX is the number of frames retransmitted by the
transmitter. The Local number is what is retransmitted from the
CPE to the DSLAM. The Remote value is what is retransmitted from
the DSLAM to the CPE.
MAX-630G