Passive Intermodulation – DTS Certification

Course Length: 1 Day 

Prerequisites:  General wireless knowledge. Antenna construction practices and antenna line sweep testing are a plus, but not required. An on-line version of the theory section is available but does not provide certifications.

Course Objectives:  Passive Intermodulation (PIM) testing is now a standard for radio site commissioning and

certification. Wireless carriers are requiring PIM testing at new sites and existing installations in an effort to increase

call quality and data rates.

The student will learn what PIM is, how it is tested and the difference between PIM testing and other antenna testing techniques.

Note: The class is more than 50% hands-on with test equipment, antenna network simulations and verifications associated with instrument operation. A wallet card showing successful completion will be issued to those attending and passing the tests

Download Course Outline : DTS PIM Certification

Introduction to PIM

  • Term & definitions
  • Standards defined
  • PIM defined
  • Why Power is important
  • Fixed Frequency Testing
  • Swept Frequency Testing

Technology Overview

  • dB – dBm – dBc
  • Intermodulation overview
  • Spurious emissions
  • Loads and antennas
  • PIM vs Line Sweep
  • Methods & Procedures

How PIM is Created

  • Internal PIM sources
  • External PIM sources
  • Multiple PIM sources
  • Torque Specifications
  • Cleanliness

PIM Testing*

  • Safety review – teams
  • Setting up the equipment
  • Equipment verification
  • Load vs Antenna
  • Taking an outage
  • Conducting the test

Results – Interpretation*

  • Spectrum analysis
  • Reading the numbers
  • What they mean
  • Troubleshooting
  • Creating reports

Certification Testing

*Student exercises, not applicable to online class