Products > Test Equipment
nanoVNA vs SVA1015X VNA (Need entry level VNA)
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rplabs:

--- Quote from: joeqsmith on September 01, 2022, 12:40:58 pm ---https://groups.io/g/liteVNA/topic/first_tests_above_6_3ghz/87993520?p=Created%2C%2C%2C20%2C1%2C20%2C0%3A%3Arecentpostdate%2Fsticky%2C%2C%2C20%2C2%2C20%2C87993520%2Cprevid%253D1643508180797191034%2Cnextid%253D1640273623127907015&next=1

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Interesting read but I noticed from the screenshots posted in the thread that performance is not quite good after 7.5~8GHz in my opinion but it is a start. I am not sure if this extended range can be improved. Seems like a hardware limitation.


--- Quote from: joeqsmith on September 01, 2022, 12:40:58 pm ---The software I wrote doesn't limit the frequency the VNA uses.  If for example the user enters 1THz for the start frequency, the software assumes you are smart enough to know what you are doing and will gladly write the data to the VNA.   

I did attempt a few of my own experiments using harmonics but it's not something I am really setup for.

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Your software is amazing. Many thanks for publishing it, I appreciate it!
joeqsmith:
At least with the LiteVNA, there were/are problems with the USB power supply.   Same for the V2Plus4.   This can have a dramatic effect on the VNAs performance.  I suspect they capped the firmware I have at 9GHz as there was no useful information after this. 


--- Quote from: rplabs on September 01, 2022, 01:24:52 pm ---Your software is amazing. Many thanks for publishing it, I appreciate it!

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Glad to hear.   
LogicalDave:

--- Quote ---Sorry it,s a converted SSA Plus, a worthless device and a waste of money.
Once you have worked with real VNA you have forgotten ALL the solutions suggested here. (Nanovna, Libre, VNWA, LiteVNA, SVA, SSA etc etc).
My advice is save enough money and buy a real VNA.
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I know this comment is more than a year old, but would you be willing to expand on your statement?

Each of these devices has a price point and is designed to meet certain needs.  What would be most helpful to people reading these threads is understanding the capabilities and limitations of each VNA *for specific tasks*.  For example, when sweeping/tuning an 868MHz antenna, characterizing a filter or a discrete component or feed line, tweaking a diplexer, etc., at what point does a user who does not have unlimited funds need to step up from a NanoVNA to a LibreVNA or SVA10xx to a Copper Mountain VNA to a  "real VNA"?
tautech:
Typically, only when you need to fully characterize a device with S11, S21, S12 and S22 measurements.
SNA5000A models allow for this by providing bidirectional stimuli.
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