I plan to use E5071C to measure a sample which is back-gated up to 100V. There is a slight chance for the insulating layer between the sample and the back gate to leak/break so that 100V may damage the analyzer ports through cables connected to the sample. To provide some protection, I am thinking about adding a pair of attenuators on the back bias input (something like this: http://www.ebay.com/itm/Mini-Circuits-C ... 0544297992 ). I think this gives the same kind of protection as connecting attenuators to the front test ports, but attenuators on the back hardly affect the signals. Am I thinking correctly?