Scanning from 50khz to 100mhz works much better than scanning 1mhz to 101mhz.
The 50khz to 100mhz scan showed a long stretch of 50 ohm cable,
it then rose to 100 ohms when it encountered a 100 ohm termination at the end
and stayed there for the remainder of the display as expected.
The 1mhz to 101mhz scan gave some rather confusing results.
The 100 ohm termination at the end of the 50 ohm cable got displayed as
a dip to 25 ohms and then back up to 50 ohms.
Also, the transitions were more rounded than the 50khz to 100mhz scan.
I guess it really needs to see that first low freq sample.
Perhaps this is related to John's observation of post 17593:
# If you set the Start frequency at half of the step size (say 15MHz to 3000MHz, 101 points),
# the impedance steps at the first (and every odd) "delay overflow" are inverted!!"
Jerry, KE7ER
toggle quoted message
Show quoted text
On Tue, Sep 22, 2020 at 09:33 PM, Jerry Gaffke wrote:
Scanning a cable from 1 to 101mhz,
