SWRA577A October   2017  – November 2020 AWR1243 , AWR1443 , AWR1642 , AWR1843 , AWR1843AOP , AWR2243 , AWR6843 , IWR1443 , IWR1642 , IWR1843 , IWR6443 , IWR6843 , IWR6843AOP , LP87524B-Q1 , LP87524J-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Power Supply Ripple and Noise Specifications
  4. 3Reference Solution
  5. 4Low Cost LC Filter Solution
    1. 4.1 LDO vs LC Filter Scheme Comparison
      1. 4.1.1 Waveguide Loopback Tests
      2. 4.1.2 Spur/Noise Floor Level
      3. 4.1.3 Voltage Transient Behavior
    2. 4.2 System Tests
      1. 4.2.1 Sensor Configuration
      2. 4.2.2 System Test With Static Object
      3. 4.2.3 Spur/Noise Floor Level
  6. 5Summary

4.1.1 Waveguide Loopback Tests

Two consecutive chirps have been analyzed with 10 µSec and 100 µSec of idle time and the below chirp configuration.

Table 4-2 provides the sensor configuration for the below tests.

Table 4-2 Sensor Configuration
ParameterValue
Start frequency (GHz)77
Frequency slope (MHz)35.003
Tx start time (µsec)0
ADC start time (µsec)5
ADC samples1024
Sample rate (Kbps)10000
Ramp end time (µsec)110
Rx gain33