[TowerTalk] Baluns/tutorial/notes.

[Steve Hunt]

Jim,

Can you say something more about what you see as the failings of the AIM.

I was impressed by how my AIM handled high impedances. If I calibrate it 
carefully, and then measure a 10k resistor, the AIM predicts a parallel 
equivalent of 10k//0.2pF with less than 5% variation anywhere in the 
range 1-30MHz.

73,
Steve G3TXQ

Jim Brown wrote:
> High impedance measurement on a traditional vector analyzer can be 
> tricky, as noted in my section on measurement. :) Reflection-based 
> measurements yield considerable error, because the unknown Z is too 
> far from the 50 ohm circuit Z. HP addresses this in one of their app 
> notes on Z measurement. That's the failing of the AIM unit. 
>