If the blue head to head cable (or either one of the black triax cables for systems that do not have a blue triax cable) was removed during operation of the PEM, there is a good chance that your PEM will need to be returned for repair. Follow the test procedure that is on page…
Repair Questions
My PEM is not providing stable retardation and/or there is noise if I look at my signal on an oscilloscope. What could be wrong?
There are several possibilities. A list of questions to begin troubleshooting is: What is your optical and electronic setup? What is the light source you are using and the wavelength or wavelengths (in particular, are you using a laser)? What detector are you using? When the PEM is operating, is the limit light off, on…