Indeed!
Yeah, unfortunately, the ENA won't do it.? Not sure if some of the
new ones will or not..... I've been retired too long!
Still have to get back up your way... maybe in the spring!
Daun
On 11/17/2018 9:06 PM, Gedas wrote:
Hi Daun....long time no chat. Yup understand
100% but was hoping that the ENA had a function to do that for
me. There are some "VNA's" that will do that for you. I guess
this one will not hi-hi.
Gedas, W8BYA
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
On 11/17/2018 8:54 PM, Daun Yeagley
wrote:
Gedas, what you are seeing is "phase wrap".? The detectors in
the VNA's can't resolve more than 360 degrees... 370 degrees
looks the same as 10 degrees!
The only way you can do it is to count how many "wraps" you
have, IF you can do it in a continuous sweep with no bridges
over the wraps.
Hope this gets you started in understanding that!
Daun
On 11/17/2018 8:45 PM, Gedas wrote:
Can someone point me to some reading material to help me
understand how to measure phase on my ENA?
I have the operators manual but it is not at all helpful.
In short I chose a simple ~19" length RG-223 coaxial jumper
as a starting point to help me better understand my
instrument. I am having difficulty in getting the display to
show phase shifts great then 180 degrees even though the
Y-axis is indicating I have plenty of latitude, i.e., +/-
450 degrees etc.
I.e., below is a screen capture where I am showing the
phase shift thru that jumper at 104MHz.....back of the
napkin calculations show that in fact ~19" length of V.F.
0.66 cable should provide -90 degrees phase shift:
Things even work well when I double the frequency to 208
MHz and obtain a ~180 degree phase shift:
The issue is when I go slightly higher in frequency I would
like to display phase shifts great then? -180 degrees. As
soon as I go higher in frequency the plot jumps up to a
positive 180 degree phase shift.
I would like to know if I can setup my ENA to display say
-270 or -400 degree phase shifts. I have been using PHASE
under the display options and do see options for POS PHASE,
& EXPANDED PHASE. I was hoping expanded phase would do
what I wanted but it did not. The manual does not discuss
how to use these formats.
Gedas, W8BYA
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
--
Daun E. Yeagley II, N8ASB
--
Daun E. Yeagley II, N8ASB
