Checkpoint’s InfraScan LTM option can be installed on either InfraScan 400TDM or InfraScan ES400 system chassis. The LTM option is a laser probe that uses the reflected light from the LSM to create both signal mapped images (SMI’s) and electrical waveforms from the DUT.
Collecting the reflected light from the DUT while it’s being tested in a continuous loop, allows LTM user’s the opportunity to measure its change in reflected power. By using a spectrum analyzer the user can isolate a specific electrical frequency that is propagating through the DUT. This isolated frequency can be imaged, simultaneously while imaging with the LSM. This imaged frequency is the SMI, shown below in false color in figure 1 is overlaid on top of the corresponding optical image.