Questions tagged [nanovna]
The nanovna tag has no usage guidance.
12
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Using NanoVNA to tune antenna
I'm extremely new to this, so I'm mostly asking for tutorials and so on.
I have tried configuring the device according to one tutorial I found. When I hook up the cheap antennas that came with a ...
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3
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Why does SWR of a dipole decrease the closer it is to the ground?
I experimented with a 20m dipole made of a 1:1 balun connected to 2x ~5-meter lengths of copper wire, running parallel to the ground (by "ground" I mean "pavement", not quite the ...
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How to determine if filter is well matched?
Hello i'm in process of creating band pass filters for my ham radio. I calculated the filter for 80m band basing on this website:
And recreated it in reality:
Then I started measuring it with ...
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Is this amount of loss normal with LMR400?
I have a run of about 150 feet of LMR400 (specifically, it's this DX Engineering "400MAX" product). It connects to an Ed Fong antenna (2m, 1.25m, 70cm tri-band J-Pole) about 75 feet up a ...
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Why would a VNA not make a good Spectrum Analyzer? Or an SDR a good VNA?
Happy to be corrected where I'm wrong in any of this but in broad strokes my understanding is:
Spectrum Analyzer
measures input signal strength while sweeping across frequencies, measuring RF ...
- 7,229
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Measuring actual feedpoint impedance for a given frequency
Background
I'm attempting to tune an antenna with my NanoVNAv2.
I calibrated it using the included open/short/(50-ohm)load standards by screwing them directly onto the NanoVNA one by one and running ...
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2
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How do I configure a NanoVNA v2Plus4 to check a 1:1 Balun?
Note that the menus are different than those I'm seeing on YouTube which aren't for the V2plus4. What's missing is "Isolation" and of course, there is an additional standard for that which ...
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Can you think of any reason my NanoVNA says my antenna has 1.2 SWR while my radio says it has off the scale SWR?
My radio is an mcHF kit that I just finished soldering up. It receives fine, but when I went to transmit it's giving off the scale SWR. I rechecked my antenna with my NanoVNA, and it shows 1.2 SWR at ...
- 401
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Using a Return Loss Bridge and Nano VNA to measure amplifier characteristics
One of the difficulties of measuring active devices like LNA and IF amplifiers with the Nano VNA is the care needed to avoid over-driving the amplifier input and, more importantly perhaps, to avoid ...
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Measurement of antenna with VNA does not match its specs
I have a NanoVNA V2 Plus (50kHz - 3GHz) and decided to test my LoRa antennas:
an unknown antenna delivered with a LoRaWAN gateway (RAK831)
a 868Mhz antenna from Linx Technologies (ANT-868-OC-LG-RPS)
...
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3
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2
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NanoVNA(v2)... what to capture for future reference when comparing past antennas?
I'm designing a HF antenna that uses a portion of a downspout (electrically isolated from the gutters above and lower portion) as a bottom-loaded shortened quarter-wave vertical.
I'm about to trim the ...
- 401
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2
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Saving snapshot of NanoVNA (v2) data for later review, analysis, comparison, etc
I have a NanoVNA (v2), and I'm using it with vna-qt. I want to capture the raw data from a sweep for posterity, so that I can someday compare different antenna variants for things like SWR, resonance, ...
- 401