SPRACP3D November   2019  – August 2026 AWR6843 , AWR6843AOP , IWR1443 , IWR1642 , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Typical Certification Procedure
  5. 3Regulatory Compliance Overview
    1. 3.1 European Union Regulations: Radio Equipment Directive (RED)
      1. 3.1.1 Short Range Radar (EN 305 550)
      2. 3.1.2 Short Range Level Probing Radar (EN 302 729)
        1. 3.1.2.1 Permitted Frequency Ranges and Operating Bandwidth
        2. 3.1.2.2 Antenna Requirements
      3. 3.1.3 RF Exposure Limit - EN 62311
      4. 3.1.4 Electrical Safety - EN 62368
      5. 3.1.5 Electromagnetic Compatibility (EMC) - EN 301 489
    2. 3.2 Federal Communications Commission (FCC)
      1. 3.2.1 End Equipment and FCC Clause
      2. 3.2.2 60GHz Radar Operation (47 CFR § 15.255)
        1. 3.2.2.1 Fundamental Emission Levels, BWs, and Max Duty Cycle
        2. 3.2.2.2 Spurious Emissions
        3. 3.2.2.3 Frequency Stability
        4. 3.2.2.4 FCC Waiver and Other Relevant Information
      3. 3.2.3 Level Probing Radar (47 CFR § 15.256)
        1. 3.2.3.1 Usage Limitations
        2. 3.2.3.2 Fundamental Emissions, BWs
        3. 3.2.3.3 Antenna Restrictions
        4. 3.2.3.4 Unwanted Emissions
      4. 3.2.4 Modular Approval (47 CFR § 15.212)
      5. 3.2.5 Radiation Exposure Requirement
    3. 3.3 Japan Radio Law
      1. 3.3.1 BW, Designated Frequency, and Tolerances
      2. 3.3.2 Out of Band and Spurious Emissions
      3. 3.3.3 Controller Functions
    4. 3.4 Wireless Planning and Coordination Wing (WPC)
      1. 3.4.1 Permitted Frequency of Operations and Approval
      2. 3.4.2 Equipment Type Authorization
    5. 3.5 Federal Telecommunications Institute (IFT)
      1. 3.5.1 Fundamental Emission Levels and BWs
    6. 3.6 National Telecommunications Agency (ANATEL)
      1. 3.6.1 Fundamental Emissions Levels, BWs, and Max Duty Cycle
      2. 3.6.2 Licenses
    7. 3.7 Ministry of Transport and Communications (MTC)
    8. 3.8 National Communications Entity (ENACOM)
  6. 4Applicable Terms and Equations
    1. 4.1 Duty Cycle Factor
    2. 4.2 Effective Isotropic Radiated Power (EIRP)
    3. 4.3 Friis Equation
    4. 4.4 Far-Field Boundary
  7. 5Tools and Setup
    1. 5.1 Hardware Setup
    2. 5.2 Internal Laboratory Test Setup
      1. 5.2.1 Near-Field Circuit Probing
      2. 5.2.2 Occupied Bandwidth Testing
      3. 5.2.3 Radiation Pattern Measurement
    3. 5.3 MMWAVESTUDIO
      1. 5.3.1 Running LUA Scripts
    4. 5.4 mmWave Visualizer
    5. 5.5 IWR6843ISK-ODS Test Case
  8. 6Common Issues and Resolutions
    1. 6.1 Peak Power
    2. 6.2 Occupied Bandwidth
    3. 6.3 Spurious Emissions
      1. 6.3.1 14.4GHz Harmonics
      2. 6.3.2 Suggested Resolution
        1. 6.3.2.1 Hardware Measures
        2. 6.3.2.2 Software Measures
          1. 6.3.2.2.1 APLL Duty Cycling
          2. 6.3.2.2.2 APLL VCO RTRIM Setting in BSS Firmware
    4. 6.4 Overshoot
    5. 6.5 Frequency Stability
      1. 6.5.1 Generating CW Signal
      2. 6.5.2 Frequency Stability Over Temperature and Voltage Range
    6. 6.6 EIRP Spiking and Spectrum Analyzer BW
  9. 7References
  10. 8Revision History

3.1.1 Short Range Radar (EN 305 550)

AM72 OFR, Out of Band and Spurious Emission Frequency LimitFigure 3-1 OFR, Out of Band and Spurious Emission Frequency Limit

The following limits and tests apply:

  • Duty Cycle: The duty cycle is factored into mean power measurement when using a power meter; see section on duty cycle (Section 4.1).
  • Permitted range of operating frequencies: See section 4.3.1 of EN 305 550V2.1.0 ( section 7.3 EN 305 550-1V1.2.1). This is the authorized frequency range devices are permitted to operate.
  • Operating frequency range (OFR): See section 4.3.2 of EN 305 550V2.1.0 . This is the intentional operating frequency range of the device. The IWR6843 mmWave device falls in the 57GHz to 64GHz band and can also be operated in the 61.0GHz to 61.5GHz bandwidth. The occupied bandwidth (OBW) is measured as the bandwidth occupying 99% of the total power in the operating frequency range.
Table 3-1 Operating Frequency Range
Bandwidth (GHz)FL (GHz)FH (GHz)
57 - 64> 57< 64
61.0 – 61.5> 61< 61.5
122 - 123> 122< 123
244 - 246> 244< 246
  • Mean Power: See section 4.3.3 of EN 305 550V2.1.0 ( section 7.2 EN 305 550-1V1.2.1) . Mean power is a measure of radiated power or mean equivalent isotropic radiated power (EIRP), and refers to the highest transmitted power level during the transmission cycle. The limit for 57GHz to 64GHz is 100mW EIRP (20dBm EIRP), and the same limit applies to 61.0GHz to 61.5GHz. When taking measurement using a signal analyzer the channel power function is used:
    Equation 1. 20dBm EIRP= 115.23dBuV/m at 3m
  • Mean Power spectral density: See section 4.3.4 of EN 305 550V2.1.0 ( section 7.1 EN 305 550-1V1.2.1). This is defined as the emitted power spectral density over the transmission bandwidth in the direction of maximum antenna gain. Limit for 57GHz to 64GHz is 13dBm/MHz EIRP. No limit is defined for 61.0GHz to 61.5GHz.
  • Out of band (OOB) emissions: See section 4.3.5 of EN 305 550V2.1.0 ( section 7.4 EN 305 550-1V1.2.1). The OOB bandwidth is calculated as in Equation 2.
    Equation 2. Fsl= fc- 25× OBW
Equation 3. Fsh= fc+ 25× OBW

Table 3-2 shows the limits and bandwidth for out of band and spurious emissions for the mmWave device operating at both the full 4GHz bandwidth and 500MHz bandwidth.

The occupied bandwidth (OBW) is the width of the intentional signal mean power containing 99% of the total mean power. Power below and above this limit (the out of band emission) must be equal to 0.5% of the mean power. This equates to -23dBc bandwidth of the signal.

Table 3-2 Out of Band and Spurious Emissions Bandwidth
OBW/OFR Permitted operating frequency range fsl fl fc fh fsh OOB limit
4GHz 57GHz to 64GHz 52 60 62 64 72 -20dBm/MHz
500MHz (similar limits to 4GHz applies if operating outside of the 61 to 6.15 range ) 61.0GHz to 61.5GHz 60 61 61.25 61.5 62.5 -10dBm/MHz
  • Radiated spurious emissions: See section 4.3.6 of EN 305 550V2.1.0 ( section 7.5 EN 305 550-1V1.2.1). The spurious emission frequency range includes frequency beyond the OOB limit. The spurious emission is measured up to the 2nd harmonic of the fundamental frequency; the IWR6843 operates from 60-64GHz, with second harmonic at 128GHz.
  • Receiver spurious: See section 4.4.2 of EN 305 550V2.1.0 (section 8 EN 305 550-1V1.2.1). Per clause 4.4.2.1 the receiver spurious is only applicable when the equipment can work in receive-only mode. The test does not apply to mmWave devices, as it operates in simultaneous transmit/receive mode.
  • Receiver interference signal handling: See section 4.4.3 of EN 305 550V2.1.0. This measures the capability of the device to coexist with other radio applications transmitting within the in-band, OOB, and remote band frequency limit. The interference source must transmit at 10dBm equivalent EIRP for in band frequency and 20dBm equivalent EIRP for OOB and remote band frequency.
    Equation 4. In band frequency = center frequency fc
    Equation 5. OOB= Fc± OBW
    Equation 6. Remote band = Fc± 10× OBW