but he wrote < 1 MHz, not 1MHz - 50 MHz.
I currently have the same problem, in that my ZVB-8 starts only at 300 KHz ( 150 KHz overrange )
I have written a program to do Bode plots with my Agilent 89441A, but that turned out to be a lot more more work than I hoped for. It gets tricky to achieve a nice dynamic range down in the 1/f region.
regards, Gerhard