Very cool! It make a Pi and larger touchscreen very attractive for a fully portable system with arbitrarily complex features. An SD card would allow storing many sweeps of antennas and feedlines so you could check for degradation every spring as part of regular station maintenance.
If you had a record of a feedline sweep for several years to compare to, you could have considerable confidence that the line was in good condition and with TDR could locate where the problem was easily if a scan did not match past results.
