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EVM Sweeps

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Design Goal

  • Modular reusable EVM / ACLR bathtub tool
  • Use w/ any instrument
  • Standarized data output
    • Reuse analysis tools
    • Compare different instruments

Files

  • Bench.ini: Contains instrument IP addresses
  • EVM_Sweep_Simple.py
    • Contains no SCPI
  • EVM_Sweep_PLOT_Bathtub.py
  • {standard}_{instr}_meas.py
    • Contains instrument specific SCPI
    • Abstracts instrument & standard for EVM_Sweep_Simple

Suggested Debug steps

  1. Verify bench
    1. Edit IP address in bench.ini
    2. Run bench_Config.py to connect
  2. Config instruments
    1. Preset instruments
    2. Run VSA_Config() & VSG_Config()
    3. Verify instruments are Configured for test
    4. Run & verify
      1. VSx_freq(self, freq)
      2. VSA_level(self)
      3. VSA_sweep(self)
      4. VSA_get_ACLR(self)
      5. VSA_get_EVM(self)
  3. Verify EVM_Sweep_Simple()
    1. Preset instrument
    2. Run EVM_Sweep_Simple()
    3. Verify *.txt created w/ data

Program flow

graph TD
    EVM_Sweep_Simple <--> Standard_Driver <--SCPI--> Instrument
    EVM_Sweep_Simple --> data.txt --> EVM_Sweep_PLOT_Bathtub
    data.txt--> MS_Excel
Loading

Driver details

  • {standard}_{instr}_meas.py
    • init(self)
    • VSA_Config(self)
    • VSA_get_ACLR(self)
    • VSA_get_attn_reflvl(self)
    • VSA_get_chPwr(self)
    • VSA_get_EVM(self)
    • VSA_get_info(self)
    • VSA_level(self, method='LEV')
    • VSA_Load(self, file)
    • VSA_save_state(self)
    • VSA_sweep(self)
    • VSG_Config(self)
    • VSG_pwr(self, pwr)
    • VSG_save_state(self)
    • VSx_freq(self, freq)

Typical tests

5G FR1 Benchmark Config

  • Freq: 0.7; 1.9; 3.5; 5; 7GHz
  • Pwr : -45 to +5 in 1dB steps
  • Wave:
    • 5G_FR1_UL_30KHz_SCS_100MHz_RFBW_1024QAM
    • 5G_FR1_DL_30KHz_SCS_100MHz_RFBW_1024QAM

5G FR2 Benchmark Config

  • Freq: 24; 28; 39; 43GHz
  • Pwr : -45 to +5 in 1dB steps
  • Wave:
    • 5G_FR2_UL_120KHz_SCS_100MHz_RFBW_1024QAM
    • 5G_FR2_DL_120KHz_SCS_100MHz_RFBW_1024QAM

5G FR3 Benchmark Config

  • Freq: 8; 13; 15GHz
  • Pwr : -45 to +5 in 1dB steps
  • Wave:
    • 5G_FR3_UL_60KHz_SCS_100MHz_RFBW_1024QAM
    • 5G_FR3_DL_60KHz_SCS_100MHz_RFBW_1024QAM

802.11 Benchmark Config

  • Freq: 2.4; 5.3; 5.9; 7.0GHz
  • Pwr : -45 to +5 in 1dB steps
  • Wave:
    • 802.11be_160MHz_RFBW_4096_Preamble only
    • 802.11be_160MHz_RFBW_4096_Preamble & Payload only
    • 802.11be_320MHz_RFBW_4096_Preamble only
    • 802.11be_320MHz_RFBW_4096_Preamble & Payload only

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