1xEV-DO BTS Analyzer (Option K84) R&S FSL
1300.2519.12 4.384 E-11
Power vs Symbol
Selects the Power versus Symbol result display.
T
his result display shows the power of each symbol for the selected code (see Select Code
Slot) and the Channel Type.
The result display shows the absolute power at each symbol time for a selected code of a
specific channel and the selected slot. It thus takes results of a code of the selected channel
type into account.
The number of symbols on the x axis is between 2 and 100.
Remote: CALC2:FEED "XTIM:CDP:PVSY"
Composite EVM
Selects the result display of the error vector magnitude (EVM) over the total signal (modulation
accuracy).
In this result display, the square root is determined from the error square between the real and
imaginary parts of the test signal and an ideally generated reference signal (EVM referred to the
total signal).
The result display consists of a composite EVM measured value for each slot. You can set the
number of slots by the Capture Length. Subsequently, the Composite EVM result display takes
the whole signal into account over the entire period of observation. The selected slot is marked
in red.
Only the channels detected as being active are used to generate the ideal reference signal. If a
channel is not detected as being active, e.g. on account of low power, the difference between
the test signal and the reference signal and the composite EVM is therefore very large.
Distortions also occur if unassigned codes are wrongly given the status of "active channel". To
obtain reliable measurement results, select an adequate channel threshold via the Inactive
Channel Threshold field.
Remote: CALC2:FEED "XTIM:CDP:MACC"
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