Testing Method: SPP
Short pulse propagation (SPP) was developed in the 1990s by IBM corporation and was one of the first methods for measuring attenuation at high frequencies. Since its inception, it has become known for its versatility in characterizing a diverse spread of broadband interconnect technologies with an emphasis on printed wiring boards.
As circuit board bus speeds increased, designers became increasingly aware of the impact that signal loss has on maintaining the signal integrity of their designs. As the operating frequencies of PCBs continued to climb, engineers found that slight variations in manufacturing, which had little effect on impedance, could have a large impact on signal loss. Therefore in 2008, IBM engineers approached Introbotix to develop an SPP test methodology that would be easy to use and suitable for testing loss coupons at high volumes in a manufacturing facility. In 2011, Introbotix released the first production test platform for measuring high frequency signal loss in the ACCU-Prober with SPP. Fully licensed by IBM, the ACCU-Prober with SPP is used worldwide by manufacturers as well as high frequency circuit board developers.
ACCU-Prober with SPP
ACCU-Prober with SPP is the flagship of the ACCU-Prober open platform. Available in a 2 channel or 4 channel configuration, it is able to measure SPP at 20 GHz (IPC TM-650 18.104.22.168 Compliant) as well as SET2DIL (Sdd21 differential insertion loss, IPC TM-650 22.214.171.124 compliant), EBW and other TDR measurements (TM-650 126.96.36.199 & 188.8.131.52 standard test methods.)
ACCU-Prober HF50 with SPP
Ready for the next generation of higher frequency electronics, the ACCU-Prober HF50 more than doubles the frequency range of the original ACCU-Prober, taking measurements up to 50 GHz. The SPP method is ideally suited to the high frequency testing range of the HF50.