This had me freaking out a little too. With the USB cable being so short between my computer and the BB60 I had to go with a 5 meter coax to keep my test antenna far enough away as to not overload the analyzer with cellular/bluetooth/WiFi signals.
I was testing in the 928/952 MAS band and just happened to go 0-6 GHz while shutting down and received all sorts of warning messages about overload. The signals were all up in the LTE and WiFi bands. Still, I try to be nice to the front end of the analyzer.
I have the input limiter, 1 dB pad and DC block in-line with the SMA. That just needs to be a normal operating practice as it used to be with the multi-tens of thousands of dollars analyzers of yesteryear.
Time to unbox the low-pass/ high-pass filters to chop out those unwanted interferers.
