SWRA370A September   2011  – December 2025 CC1100 , CC1101 , CC2500 , CC2510 , CC2520 , CC2530 , CC2530-RF4CE , CC2540 , CC2540T , CC2541 , CC2541-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Acronyms
  5. 2Standards and System Requirements
    1. 2.1 Standards
    2. 2.2 Test Equipment Suppliers
    3. 2.3 Radio Certification URLs
  6. 3Test Equipment Requirements
    1. 3.1 System Setup
      1. 3.1.1 Conducted Test Systems
      2. 3.1.2 Radiated Test Systems
    2. 3.2 Initial Considerations for Testing
    3. 3.3 Testing Reminders
  7. 4Software Setup
    1. 4.1 SmartRF Studio 7
      1. 4.1.1 SmartRF Studio 7 Start-Up Window
      2. 4.1.2 SmartRF Studio 7 Modes
      3. 4.1.3 SmartRF Studio 7 Device Control Panel
      4. 4.1.4 SmartRF Studio 7 Software User Manual
    2. 4.2 SmartRF Studio 8
      1. 4.2.1 SmartRF Studio 8 Start-Up Window
      2. 4.2.2 SmartRF Studio 8 Radio Control Window
      3. 4.2.3 SmartRF Studio 8 Software User Guide
  8. 5DUT and Test Instrument Information
    1. 5.1 DUT
    2. 5.2 Test Instruments
  9. 6Clock Frequency Tuning
    1. 6.1 HF Clock Tuning Utilizing the Internal Cap Array
    2. 6.2 LF Clock Tuning
  10. 7Transmission Tests
    1. 7.1 Transmission Power
    2. 7.2 Power Spectral Density Mask
    3. 7.3 Error Vector Magnitude
    4. 7.4 Transmission Center Frequency Offset
    5. 7.5 Spurious Emissions
  11. 8Receive Testing
    1. 8.1 Receiver Sensitivity
    2. 8.2 Interference Testing
    3. 8.3 Interference Testing with RF Generator
  12.   Appendix A Offset EVM vs. EVM
  13.   B References
  14.   B Revision History

7.5 Spurious Emissions

Purpose: To verify that the conducted spurious emissions are within limits.

Pass Condition: See respective standards document for specifications and pass conditions.

Test Condition: Figure 7-17 shows the setup for spurious emissions test setup.

Spurious Emissions Test Setup Diagram Figure 7-17 Spurious Emissions Test Setup Diagram
Spurious Emissions Test Bench Setup Figure 7-18 Spurious Emissions Test Bench Setup
Spectrum Analyzer Output from Spurious Emissions Test Figure 7-19 Spectrum Analyzer Output from Spurious Emissions Test

Procedure:

  • Step 1: Connect the instruments as shown on Figure 7-17 and Figure 7-18.
  • Step 2: Set the EM to continuous, modulated TX mode in SmartRF Studio. Set the center frequency to the desired channel frequency.
  • Step 3: Measure spurs from the minimum limit to the maximum limit of the spectrum analyzer. (Reference Figure 7-19 for an example of the results on the spectrum analyzer, spurs shown are harmonics)
Note: To obtain true output power of the unit, add back cable loss to the measured output power. Additionally, different spectrum analyzers have different maximum frequencies. Up to 25GHz is more than sufficient.
Note: Regulatory Compliance for Spurious Emissions

Spurious emissions are subject to regulatory limits specific to your operational region. Your product must comply with all applicable regional standards and regulations. For reference, below are common harmonic emission limits for 2.4GHz frequency operations.

ETSI (European Telecommunications Standards Institute) EN 300 328: Governs the 2.4GHz band.
  • Field Strength: Cannot exceed 54dBuV/m.
  • Spurious Emissions: EIRP (Effective Isotropic Radiated Power) must be below -30dBm at a distance of 3 meters.
FCC (Federal Communications Commission) §15.209 General emission limits.
  • Field strength: Cannot exceed 500uV/m at a distance of 3 meters. This is equivalent to 54dBuV/m.
  • Spurious Emissions: EIRP (Effective Isotropic Radiated Power) must be below -41.3dBm at a distance of 3 meters.
Table 7-7 Spurious Emission Test Results
Channel Frequency Spur Frequency Measured Spur (dBm) Design Specification (dBm) Pass/Fail?
1
2
3
Test Results: