Test Functions
520 FTB-700G/800 Series
RTD (CPRI Framed L2)
Round Trip Delay
Indicates the time required for a bit to travel from one point to another.
Delay T14 indicates the round trip delay measurement from the Base
Station going through the Remote Radio Head (including Toffset) and
back to the Base Station. The Delay T14 appearing on the diagram
corresponds to the average value.
Cable Delay indicates the cable delay measured from the Base Station
to the Remote Radio Head (RRH) or vice-versa assuming that the
cabling in both directions are the same. The Cable Delay appearing on
the diagram corresponds to the average value.
Last indicates the result of the last delay measurement.
Minimum indicates the minimum delay recorded.
Maximum indicates the maximum delay recorded.
Average indicates the average delay value.
Unit measurement selections are μs (default) and ns.
Toffset allows the configuration of the internal delay introduced by the
electronic components in the Radio Equipment (RE): 0 μs (default) to
66.67 μs.
Note: A warning icon appears next to the Tof f set value when this value is larger
than the Delay T14 value measured indicating that the Toffset configured
value maybe invalid thus corrupting the Cable Delay values reported.
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