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OneExpert DSL User's Guide
22052280, Rev. 015 April 2019
Chapter 11 Testing with SmartIDs
167
Splitter – Indicates a passive splitter may be present at this length in the cable under
test.
Low-Quality Splitter – Indicates a low-quality splitter may be present at this length.
Low-quality splitters can induce standing waves and cause poor performance. These
low-quality splitters can also cause conventional cable ID to function incorrectly since
many are DC coupled, causing the ID resistive values to be placed in parallel.
Splitter* – Indicates an assumed splitter. The instrument has not detected a splitter
signature. However, based on the data signature the instrument has deduced that a
splitter is likely present.
NOTE: If the length to the splitter* and the first open are the same, it is likely a
splitter with an open port.
Barrel/Splice – Indicates an event was detected followed by a single low loss open
event. This can be caused by barrel splices, low-quality splitter with an open port,
severely kinked or crimped cable (stables), poor connector, etc.
The return loss of the barrel/splice event should be considered when determining
what action, if any, is required. Lower return loss (around -20 dBrl) values may
not require action, but high values indicate an event that may be effecting cable
performance.
NOTE:
In the unlikely event that the legs of a splitter are the same
length, the instrument will report a single event with a return
loss value that approximately equals the sum of the events.
NOTE:
The cable ID won't work properly if there's a cable plugged
into the side of the unit (you must only use the coax
connector on the top).
A cable ID is displayed above the system keys. The OneExpert will only find an ID if it's
connected to a single cable with an ID on the other end. The RFIDs, however, will work through
splitters and multiple tags can be detected.