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Basic Question About Complex Impedance Numbers


 

Hello all...
I have a dipole that I ran a sweep on with NanoVNA Saver, and a NanoVNA-H. When looking at the complex impedance at the closest point to resonance ('0' reactance), I get numbers like

56.3-j697m ohms (no 'ohm' symbol on my laptop).

What does the 'm' mean? I'm assuming that means the reactance part is very close to '0'. Is that correct, or am I all wrong?

Thank you for your time.


 

"m" simply means "milli". I.e., 56.3 - j*0.697 ohms.


 

Thank you very much Christian. That was what I suspected, but wanted confirmation.

Ed


 

On 10/6/20 4:25 AM, ed.jackson001@... wrote:
Hello all...
I have a dipole that I ran a sweep on with NanoVNA Saver, and a NanoVNA-H. When looking at the complex impedance at the closest point to resonance ('0' reactance), I get numbers like
56.3-j697m ohms (no 'ohm' symbol on my laptop).
What does the 'm' mean? I'm assuming that means the reactance part is very close to '0'. Is that correct, or am I all wrong?
milli. so it's 0.697 ohms.


Mark Erbaugh
 

I believe the m stands for milli (1/1000).

Mark

*From:* Jim Lux ( jimlux@... )
*Sent:* Tuesday, October 6, 2020 9:44 AM
*To:* [email protected]
*Subject:* Re: [nanovna-users] Basic Question About Complex Impedance Numbers

On 10/6/20 4:25 AM, ed.jackson001@... wrote:

Hello all...
I have a dipole that I ran a sweep on with NanoVNA Saver, and a NanoVNA-H. When looking at the complex impedance at the closest point to resonance ('0' reactance), I get numbers like
56.3-j697m ohms (no 'ohm' symbol on my laptop).
What does the 'm' mean? I'm assuming that means the reactance part is very close to '0'. Is that correct, or am I all wrong?
milli.? so it's 0.697 ohms.


 

Lower case indicates "milli" or 1E-3. So, your reading of -j667m means
-j667 milliohms or -j0.667 ohms. This is known as scientific notation or,
more specifically, engineering notation, engineering being powers of 10
modulo 3.

Also note that M indicated "mega or 1E+6.

On Tue, Oct 6, 2020 at 11:28 AM <ed.jackson001@...> wrote:

Hello all...
I have a dipole that I ran a sweep on with NanoVNA Saver, and a NanoVNA-H.
When looking at the complex impedance at the closest point to resonance
('0' reactance), I get numbers like

56.3-j697m ohms (no 'ohm' symbol on my laptop).

What does the 'm' mean? I'm assuming that means the reactance part is very
close to '0'. Is that correct, or am I all wrong?

Thank you for your time.





--
*Dave - W?LEV*
*Just Let Darwin Work*


 

I wish my dipole had those numbers ! Just out of curiosity, what freq. is ur dipole cut for ?