[TowerTalk] Measuring Common Mode Choke with Anritsu VNA
Wes Stewart
wes_n7ws at triconet.org
Fri Jan 5 07:47:50 EST 2018
That's "good enough" agreement for me:-)
Wes N7WS
On 1/5/2018 3:30 AM, Steve Hunt wrote:
> Measuring high-Z chokes accurately is challenging, and it's easy to become
> obsessive about this stuff. I know because I'm probably one of the worst
> offenders :)
>
> But then I ask myself:: if an uncompensated 0.5pF jig capacitance, or
> uncompensated jig leads 1 inch long, cause an error in the choke measurement
> that is operationally significant, variations in choke installation method
> will likely have the same effect and more. On top of that we have to remember
> the tolerance in ferrite characteristics - variously quoted as 25%. So why
> strive for measurement accuracy that has little direct relevance to most
> real-world installations?
>
> Steve G3TXQ
>
> On 03/01/2018 12:54, Wes Stewart wrote:
>> In my opinion, and with my equipment, a two-port through measurement is
>> probably the better method. That said there a lot of folks with one-port
>> measurement equipment who can make "good enough" measurements on common-mode
>> chokes.
>>
More information about the TowerTalk
mailing list