Chapter
15 Test Results
OneExpert DSL User's Guide
22052280, Rev. 015
April 2019
254
• LATN
– Line attenuation. Attenuation average of all tones/bins (the entire line,
including empty bins/tones). For a description of the settings impacting this
calculated value, see
step 10 on page 82 of “Specifying test settings” in Chapter 4
“xDSL / G.fast Testing”
.
• Tx Power
– Power level, in dBm, of the signal, downstream (from the DSLAM) and
upstream (transmitted by the OneExpert DSL).
• INTLV Delay
– Interleaving depth set by the DSLAM. This is a measure of latency
introduced on the link due to the scrambling of DSL frames to protect data and
create a more reliable link.
• Actual INP
– The number of consecutive DMT symbols for which errors can be
completely corrected.
Identity
• HW Type
– Type of modem hardware
• HW Rev
– Revision of the hardware
• xTU-R SW Revision
– SW revision of the local modem
• xTU-R PHY Revision
– PHY firmware revision for the local modem
• xTU-O Vendor
– CO vendor code
• xTU-O Rev
– CO revision number
• XTU-O S/N
– Far-end (DSLAM or DPU) Broadcom chipset serial number. This may
contain information that uniquely identifies the DSLAM or DPU port under test (only
available for the BCM63138 chipset).
DSL Graphs
The graphs provide a graphical representation of the following:
• SNR (signal to noise ratio) Per Tone
• Bits Per Tone (BPT)
• QLN (quiet line noise) Per Tone
• Hlog Per Tone
The SNR graph indicates line quality. The BPT graph indicates the total bit rate and is a
useful tool for finding disturbers. Bits per tone is defined as bits assigned per DMT tone.
Examine the portions of the graphs where there are dips or breaks. These dips represent
areas where interference is degrading the DSL signal.
Signal (continued)
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Страница 244: ...Chapter 14 Using the OneExpert with a Mobile Device OneExpert DSL User s Guide 22052280 Rev 015 April 2019 244 ...