SWRA478D February   2015  – January 2019 CC1310 , CC1312PSIP , CC1312R , CC1314R10 , CC1352P , CC1352P7 , CC1352R , CC2640 , CC2640R2F , CC2640R2F-Q1 , CC2642R , CC2642R-Q1 , CC2650 , CC2650MODA , CC2652P , CC2652R , CC2652R7 , CC2652RB , CC2652RSIP

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Acronyms
  3. 2Standby
  4. 3Understanding Bluetooth Low Energy Power Metrics
  5. 4SimpleLink Bluetooth Low Energy Wireless MCUs
  6. 5Power Measurement Setup – Preparing the DUT
    1. 5.1 Requirements
    2. 5.2 Embedded Software
    3. 5.3 Hardware
      1. 5.3.1 CC26x2R LaunchPad
    4. 5.4 BTool (Optional)
  7. 6Measuring Power Consumption With a DC Power Analyzer
    1. 6.1 Test Setup
      1. 6.1.1 Analysis Software Setup
    2. 6.2 Measurement Using Scope
    3. 6.3 Analysis
      1. 6.3.1 Advertising Event
      2. 6.3.2 Connection Event
      3. 6.3.3 Power Consumption Calculator
  8. 7EnergyTrace
    1. 7.1 Modifying the rfPacketTX Example
  9. 8References
  10. 9Revision History

Analysis

Depending on what the DUT is setup to do, the result will vary. If no interaction has been made with the DUT, it will be sending out periodic advertisements each 100 ms (see Figure 6-12).

GUID-78EC7A52-20F9-4C82-886B-3A0B539DAFE3-low.pngFigure 6-12 Agilent 14585A Control and Analysis Software, Advertisement Capture (CC26x2)

The approximately 2.6 s measurement includes 26 advertising events. There are no recharge pulses in Standby, as the measurement is done on CC26x2 (see Section 2).

There is functionality to do detailed measurements of the acquired waveform. Select “Markers & Measurements” to enable the markers. There are two approaches of using the markers:

  • Measure the average power consumption from a symmetric point of the measurement, (for example, from the start of an event to the point where the next event starts). This will give an approximation of the overall power consumption over time because of the reoccurring symmetry.
  • Break down the events into states to be used for various use case studies and estimations. This is very useful in order to analyze the resulting power consumption when intervals are changed

If the objective is to simply obtain a power consumption figure of the DUT, the first option is fast and reliable.