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3.3.1.12. Error Vector Magnitude (EVM)
This chapter describes measurement examples for UL (Modulation, RB) (QPSK, PartialRB), (QPSK, FullRB), (16QAM,
PartialRB) and (16QAM, FullRB).
3.3.1.12.1. MT8820C
1. [PCC/SCC] Execute MOD_AVG 20 to set the average count of Modulation Analysis to 20 times.
[(QPSK, PartialRB/FullRB) measurements]
2. [PCC/SCC] Execute TESTPRM TX_MAXPWR_Q_F to set Test Parameter to TX1 – Max. Power (QPSK/FullRB).
3. [PCC/SCC] Set UL RMC – Number of RB and Starting RB.
4. [PCC/SCC] Execute SWP to measure the Modulation Analysis.
5. [PCC/SCC] Execute EVM? AVG to read the EVM measurement result.
6. [PCC/SCC] Execute EVMPASS? to check that the EVM Pass/Fail judgment is Pass.
7. [PCC/SCC] Execute RSEVM? AVG to read the Reference Signal EVM measurement result.
8. [PCC/SCC] Execute RSEVMPASS? to check that the Reference Signal EVM Pass/Fail judgment is Pass.
9. [PCC/SCC] Execute TESTPRM TX_M40DBM_Q_F to set Test Parameter to TX1 – EVM/IBE/LEAK @ –40 dBm
(QPSK/FullRB).
10. Execute steps 3 to 8.
[(16QAM, PartialRB/FullRB) measurements]
11. [PCC/SCC] Execute TESTPRM TX_MAXPWR_16_F to set Test Parameter to TX1 – Max. Power
(16QAM/FullRB).
12. Execute steps 3 to 8.
13. [PCC/SCC] Execute TESTPRM TX_M40DBM_16_F to set Test Parameter to TX1 – EVM @ –40 dBm
(16QAM/FullRB).
14. Execute steps 3 to 8.
3.3.1.12.2. MT8821C
1. Execute MOD_AVG 20 to set the average count of Modulation Analysis to 20 times.
[(QPSK, PartialRB/FullRB) measurements]
2. Execute TESTPRM TX_MAXPWR_Q_F to set Test Parameter to TX1 – Max. Power (QPSK/FullRB).
3. Set PCC and SCC–1 UL RMC – Number of RB and Starting RB.
4. Execute SWP to measure the Modulation Analysis.
5. Execute EVM? AVG,PCC to read the PCC EVM measurement result.
6. Execute EVMPASS? PCC to check that the PCC EVM Pass/Fail judgment is Pass.
7. Execute RSEVM? AVG,PCC to read the PCC Reference Signal EVM measurement result.
8. Execute RSEVMPASS? PCC to check that the PCC Reference Signal EVM Pass/Fail judgment is Pass.
9. Execute EVM? AVG,SCC1 to read the SCC–1 EVM measurement result.
10. Execute EVMPASS? SCC1 to check that the SCC–1 EVM Pass/Fail judgment is Pass.
11. Execute RSEVM? AVG,SCC1 to read the SCC–1 Reference Signal EVM measurement result.
12. Execute RSEVMPASS? SCC1 to check that the SCC-1 Reference Signal EVM Pass/Fail judgment is Pass.
13. Execute TESTPRM TX_M40DBM_Q_F to set Test Parameter to TX1 – EVM/IBE/LEAK @ –40 dBm
(QPSK/FullRB).
14. Execute steps 3 to 12.
[(16QAM, PartialRB/FullRB) measurements]
15. Execute TESTPRM TX_MAXPWR_16_F to set Test Parameter to TX1 – Max. Power (16QAM/FullRB).
16. Execute steps 3 to 12.
17. Execute TESTPRM TX_M40DBM_16_F to set Test Parameter to TX1 – EVM @ –40 dBm (16QAM/FullRB).
18. Execute steps 3 to 12.
NOTE 1: The Input Level may vary depending on the Carrier Frequency f under the TX1 - EVM/IBE/LEAK @ –
40dBm (16QAM/FullRB) condition.
f ≤ 3.0GHz : –36.8 dBm ± 3.2dB
3.0GHz < f ≤ 4.2GHz : –36.5 dBm ± 3.5dB
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