Many thanks again Taka. I must admit that I relied on the Rigol's (1102 100MHZ 1MΩ 15pF) measurement of 5.7V P-P (a bit lazy of me). This seemed a bit high to me. I will measure on the flats with cursor and see what that yields. Not sure what the Rigol measures. It may indeed be getting the values at the peaks of the over shoot + and -.
Take Care es 73,
--- In email@example.com, "Taka Sugi" <taka_sugi1206@...> wrote:
> Hello Vaughn
> I think you may measure the signal as peak-to-peak of over/under shoot.
> Generally, probe input capacitance affects wave form and cause gover/under shooth.
> If you observe more correctly, special jack is required. The probe head
> is inserted directly to the jack and signal/GND should be connected as
> short as possible to the points.
> I am using gAgilent 500MHz probe(x10, 10Meg-ohm/8pF), but over/under-
> shoot is observed when using 2inch GND line to the point.
> My Ensemble RXTX T1 secondary output is about 2.5Vpp(atgHh,hLh flat