Receiver Testing 5968-3579ETesting and Troubleshooting Digital RF Communications Receiver Designs Application Note 1314 I Q Wireless Test Solutions Table of Contents Page Page 1 2 3 3 3 4 4 5 Introduction 1. Digital Radio Communications Systems 1.1 Digital Radio Transmitter 1.2 Digital Radio Receiver 1.2.1 I/Q Demodulator Receiver 1.2.2 Sampled IF Receiver 1.2.3 Automatic Gain Control (AGC) 1.3 Filtering in Digital RF Communications Systems 15 15 15 16 17 17 18 19 19 3. Troubleshooting Receiver Designs 3.1 Troubleshooting Steps 3.2 Signal Impairments and Ways to Detect Them 3.2.1 I/Q Impairments 3.2.2 Interfering Tone or Spur 3.2.3 Incorrect Symbol Rate 3.2.4 Baseband Filtering Problems 3.2.5 IF Filter Tilt or Ripple 3.3 Table of Impairments Versus Parameters Affected 6 6 7 8 8 9 9 9 10 11 14 14 2. Rece……