SPRACP3C November   2019  – December 2021 AWR6843 , AWR6843AOP , IWR1443 , IWR1642 , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   Trademarks
  2. 1Introduction
  3. 2Typical Certification Procedure
  4. 3Regulatory Compliance Overview
    1. 3.1 European Union Regulations - Radio Equipment directive (RED)
      1. 3.1.1 Efficient Use of the Radio Spectrum (EN 305 550)
      2. 3.1.2 RF Exposure Limit - EN 62311
      3. 3.1.3 Electrical Safety - EN 62368
      4. 3.1.4 ElectroMagnetic Compatibility (EMC) - EN 301 489-1
    2. 3.2 Federal Communications Commission (FCC)
      1. 3.2.1 End Equipment and FCC Clause
      2. 3.2.2 Fundamental Emmision levels
      3. 3.2.3 Spurious Emission
      4. 3.2.4 Frequency Stability
      5. 3.2.5 Radiation Exposure Requirement
      6. 3.2.6 FCC Waiver and Other Relevant Information
    3. 3.3 Applicable Terms and Equations
      1. 3.3.1 Duty Cycle Factor
      2. 3.3.2 Effective Isotropic Radiated Power (EIRP)
      3. 3.3.3 Friis Equation
      4. 3.3.4 Far-Field Boundary
  5. 4Tools and Setup
    1. 4.1 Hardware Setup
    2. 4.2 MMWAVESTUDIO
      1. 4.2.1 Running LUA Scripts
    3. 4.3 mmWave Visualizer
    4. 4.4 IWR6843ISK-ODS Test Case
  6. 5Common Issues and Resolutions
    1. 5.1 Peak Power
    2. 5.2 Occupied Bandwidth
    3. 5.3 Spurious Emissions
      1. 5.3.1 14.4-Ghz Harmonics
      2. 5.3.2 Suggested Resolution
        1. 5.3.2.1 Hardware Measures
        2. 5.3.2.2 Software Measures
    4. 5.4 Overshoot
    5. 5.5 Frequency Stability
      1. 5.5.1 Generating CW Signal
      2. 5.5.2 Frequency Stability Over Temperature and Voltage Range
  7. 6References
  8. 7Revision History

4.4 IWR6843ISK-ODS Test Case

For the IWR6843 test, mmWave studio was used for chirp generation and test relating to Section 3.1.1, mmWave Visualizer / Out-of-box demo was used for Section 3.1.4.

Three different chirp configurations were tested; the LUA scripts can be found in the certification package.

Table 4-1 Chirp Configurations
BandwidthOperating Frequency RangeReview
300 MHz61-61.5 GHzar1.ProfileConfig(0, 61.1, 2, 3.4, 18, 0, 0, 0, 0, 0, 0, 16.693, 1, 128, 10000, 0, 131072, 30)
ar1.ChirpConfig(0, 0, 0, 0, 0, 0, 0, 1, 0, 1)
ar1.FrameConfig(0, 0, 0, 128, 16 , 0, 1)
1300 MHz 57-64 GHz ar1.ProfileConfig(0, 60.25, 3.6, 3.5, 29.7,0, 0, 0, 0, 0, 0, 43.995, 1, 256, 10000, 0, 131072, 30)
ar1.ChirpConfig(0, 0, 0, 0, 0, 0, 0, 1, 0, 1)
ar1.FrameConfig(0, 0, 0, 128, 16 , 0, 1)
4000 MHz 57-64 GHz ar1.ProfileConfig(0, 60.25, 7, 5.0, 69.5, 0, 0, 0, 0, 0, 0, 53.265, 1, 256, 4000, 0, 131072, 30)
ar1.ChirpConfig(0, 0, 0, 0, 0, 0, 0, 1, 0, 1)
ar1.FrameConfig(0, 0, 0, 128, 16 , 0, 1)

A breakdown of the configuration parameter is shown in Table 4-1. Details on the Ar1 commands used in the script can be found by entering "help ar1.command"; for example, "help ar1.ProfileConfig" in the Lua shell of mmWave studio. For a complete list of supported ar1 commands, enter "help ar1" in the lua shell.

  • Profile configuration API which defines chirp profile parameters - ar1.ProfileConfig(UInt16 profileId, Single startFreqConst, Single idleTimeConst, Single adcStartTimeConst, Single rampEndTime, UInt32 tx0OutPowerBackoffCode, UInt32 tx1OutPowerBackoffCode, UInt32 tx2OutPowerBackoffCode, Single tx0PhaseShifter, Single tx1PhaseShifter, Single tx2PhaseShifter, Single freqSlopeConst, Single txStartTime, UInt16 numAdcSamples, UInt16 digOutSampleRate, UInt32 hpfCornerFreq1, UInt32 hpfCornerFreq2, Char rxGain)
  • Chirp configuration API which defines which profile is to be used for each chirp in a frame - ar1.ChirpConfig(UInt16 chirpStartIdx, UInt16 chirpEndIdx, UInt16 profileId, Single startFreqVar, Single freqSlopeVar, Single idleTimeVar, Single adcStartTimeVar, UInt16 tx0Enable, UInt16 tx1Enable, UInt16 tx2Enable)
  • Frame Configuration API defines Frame formation which has sequence of chirps to be transmitted subsequently - ar1.FrameConfig(UInt16 chirpStartIdx, UInt16 chirpEndIdx, UInt16 frameCount, UInt16 loopCount, Single periodicity, Single triggerDelay, UInt16 TriggerSelect)

Focusing on the 1300-MHz test case:

  • As shown in Table 3-8, the On time within burst is approximately the rampEndTime, period is sum of rampEndTime and idleTimeConst. Between burst, the period is the periodicity shown in frame configuration
  • The far field boundary was calculated using Equation 11. With the largest antenna dimension as 13 mm, the far field is calculated as shown in Table 4-2. All RF tests were done in the far field region.
    Table 4-2 Far Field Boundary
    Center FrequencyL (m)Lambda (m)Far Field (m)
    60.850.01300.00490.0690
  • More details on the test results, standards, and measurement are covered in Section 3.1 and can be found in the certification package on TIREX.