CDMA2000 BTS Analyzer (Option K82) R&S FSL
1300.2519.12 4.330 E-11
Fig. 4-36: Code Domain Error Power (results for the same signal shown in Bit Reverse code order)
Active and inactive channels are defined via the Channel Table Settings dialog box (Settings
softkey menu, Channel Table Settings softkey). The power values of the active and inactive
channels take on different colors. In addition, codes with alias power can occur. These codes
obtain power components originating either from a spreading factor higher than the base
spreading factor or from the own and/or another antenna as a result of transmit diversity.
The following colors are defined:
– Red: selected channel (Channel (Code) Number)
– Yellow: active channel
– Cyan: inactive
– Light blue: alias power of higher spreading factor
– Magenta: alias power as a result of transmit diversity
Note: If codes with alias power are displayed, set the highest base spreading factor using the Base
SF.
It is not recommended to select more detailed result displays (such as Channel Constell) for
unassigned codes, since the results are not valid.
Remote: CALC1:FEED "XPOW:CDEP"
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 power control group
(PCG). You can set the number of PCGs by the Capture Length. Subsequently, the Composite
EVM result display takes the whole signal into account over the entire period of observation. The
selected PCG (Power Control Group) is marked in red.
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