if we want to know the S11, the garph on the screen when using reflection,log mag is truly our S11 or we need to do some extra count ,and another questin is our S11 maybe at -0.5dB as you know, it has much noises do we have some ways to reduce them thanks a lot for you
If it were a full 2 port VNA, then both, source and load mismatch are compensated by the calibration. If it is only a T/R VNA then only source mismatch can be calibrated out. I guess it is only T/R? Then it is helpful that the receive port matches pretty well ☺ But even for S21 measurement, the source port should be calibrated as well, with short, open, load, in order that source mismatch can be compensated. Through calibration alone cannot account for the source mismatch. Edit: On some devices this is called Enhanced Response Calibration.
One question.....when you measure the impedance of receiver port, nano vna says 43 ohms....should it be there 50ohms?...why you say it is pretty good 50 ohms?
The specs of the upcoming NanoVNA V3 sound promising. It is supposed to be a full 2-port VNA, and up to 6 GHz. But it won't be as low-cost as the predecessors. nanorfe.com/nanovna-v3.html
Thanks, I really love your channel. Most of the other retro electronic guys on UA-cam all seem to just want to emulate Dave Jones. They even go so far as to try and talk like him and use his slang language. You seem like such a genuine guy and have your own style which I really enjoy.
For those interested in the hard line: I did not use a hard solid coax. I used a very high quality semi-rigid silver plated coax that I had.
Good recover, you got lucky. Thanks for the look.
The more I try, the luckier I get
For around 200 bucks that is one heck of a deal!
If we factor in the dough mixer and time passing the item was $10 which is astounding value :-)
The LO is the oscillator feed into the mixer, the IF is the output.
yes you are right, I was looking at a cropped schematic and forgot the topology
Hah, calibrated fingers, brilliant.
And now for the label maker...hopefully yours has an omega symbol! ;-)
My exact train if thought:)
@@QuibizOwl Now lets see if he shows us how he made the semi-rigid (rigid?) cable!
@@PapasDino Abseluty I have no clue how they are made^^
Well there go the cheap prices. 😁
if we want to know the S11, the garph on the screen when using reflection,log mag is truly our S11 or we need to do some extra count ,and another questin is our S11 maybe at -0.5dB as you know, it has much noises do we have some ways to reduce them thanks a lot for you
If it were a full 2 port VNA, then both, source and load mismatch are compensated by the calibration. If it is only a T/R VNA then only source mismatch can be calibrated out. I guess it is only T/R? Then it is helpful that the receive port matches pretty well ☺ But even for S21 measurement, the source port should be calibrated as well, with short, open, load, in order that source mismatch can be compensated. Through calibration alone cannot account for the source mismatch. Edit: On some devices this is called Enhanced Response Calibration.
Yes, this device has a full enhanced response calibration. Just not shown here.
One question.....when you measure the impedance of receiver port, nano vna says 43 ohms....should it be there 50ohms?...why you say it is pretty good 50 ohms?
The nano will never be the same :(
There is going to be a lot of shoot outs
The specs of the upcoming NanoVNA V3 sound promising. It is supposed to be a full 2-port VNA, and up to 6 GHz. But it won't be as low-cost as the predecessors. nanorfe.com/nanovna-v3.html
Check this out out: github.com/jankae/LibreVNA
It looks like a proper design.
would also be interested in how you did the hardline
Ah got it,... thx.
Are those schematics in the group you posted for me?
Good to see that 511 in parallel with the 56.2 ==> ~50ohms
you have all I have
@@IMSAIGuy I thought so, I will dig deeper.
Thank you.
Can you please explain the calibration and normalization
anlage.umd.edu/Agilent_Advanced_VNA_calibration.pdf
@@IMSAIGuy thank you.
I need it for ILS instrument landing system.
Mark, I would like to see a video on how you get those schematics? Where do the schematics come from!
www.ko4bb.com/getsimple/index.php?id=manuals
@@IMSAIGuy Thanks so much! This is a good site!!
Have you ever made a video about your background and work experience?
No, I've said bits and pieces. The channel is not about me.
here is a story: ua-cam.com/video/spAqy6HjG60/v-deo.html
ua-cam.com/video/8i5-O_8AZyk/v-deo.html
Thanks, I really love your channel. Most of the other retro electronic guys on UA-cam all seem to just want to emulate Dave Jones. They even go so far as to try and talk like him and use his slang language. You seem like such a genuine guy and have your own style which I really enjoy.
@@manuelmaseda4875 Thank you