BNC sockets for the FE-500 look really useful.
The East Tester 3501 is on AliXpress at around $900 , so the TH2830 looks like better value, and I see Mawyatt has written some software to generate curves on a pc from the 2830.
Question is, when are those enhancements, or the 34 frequencies of the 2830 over the 6 of the old Agilent unit, likely to prove useful?