 <p>According to support@ti.com,</p> <blockquote> <p>The power burst times used for TMS37157 should be 15-50ms for PB1 and 50ms for PB2. In the base station source code, dopowerburst(2), dopowerburst(3), dopowerburst(4) appear to be used for wake patterns in some of our other automotive transponders that operate a little different from TMS37157.</p> </blockquote>