Tektronix dpo4comp computer serial triggering and analysis module tektronix dpo4comp p the tektronix dpo4comp is a computer serial triggering and analysis module this module enables triggering on packet level information on rs 232 422 485 uart buses it will also enable triggering on analytical tools such as digital views of the signal bus views packet decoding search tools and packet decode tables with time stamp information p tektronix dpo4comp application module