Keysight E6610A, Руководство пользователя и программирования

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12 SCPI Command Reference
3. IQ Offset (dB)
4. Gain Imbalance (dB)
5. Quadrature Error (deg)
6. Number of Symbols Analyzed
7. Composite EVM RMS (%)
8. Composite EVM Peak (%)
9. Number of QPSK Symbols
10. QPSK EVM RMS (%)
11. QPSK EVM Peak (%)
12. Number of 16QAM Symbols
13. 16QAM EVM RMS (%)
14. 16QAM EVM Peak (%)
15. Number of 64QAM Symbols
16. 64QAM EVM RMS (%)
17. 64QAM EVM Peak (%)
18. Total Bits (number)
19. Error Bits (number)
20. Bit Error Rate
Bit error rate results are returned only if option BR1 is installed
in the E6610A; otherwise the values are zero.
The demodulation test model to be used is set using one of these
commands: CONFigure:RADio:TMODel or
SENSe<1|2>:CPRI:CAPTure:TMODel.
This command also generates a plot file of the EVM
constellation points, which can be exported using the
appropriate TRACE command.
NOTE: If a custom waveform file is being measured, use the
command SENSe<1|2>:CPRI:CAPTure:DEModtype
OFDM|SCFDMA to select the appropriate demodulation scheme
before making the EVM measurement.
MEASure[1]|2:CCDF? Initiates a new capture on the selected E6610A RF RX input and
returns the following CCDF values :
1. RMS Power in dBm
2. Crest Factor in dB
3. Peak Power in dBm
4. Peak to Average ratio for 10%, in dB
5. Peak to Average ratio for 1%, in dB
6. Peak to Average ratio for 0.1%, in dB
7. Peak to Average ratio for 0.01%, in dB
A Peak to Average ratio value of of X dB for 1% means that 1%
of the power measurements were at or above a PAR of X dB.
84 Keysight E6610A User and Programming Guide