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Can i use the nanoVNA to search for a QRM source? As the simple person that i am, i am thinking about connecting an antenna to S2 and trying to make something of the signal i'm getting. Does the signal change when i walk around the neighbourhood, or when i point in a specific direction etc... Is this possible and if so which format setting should i use?

The task you are describing is far better served by one of the following
options:

1) What you need is a spectrum analyzer, NOT a VNA. The TinySA is quite
affordable and capable for the purpose:

I believe most of the major amateur radio suppliers carry it. If not,
order from the supplier to assure it's genuine and not a clone.

2) Couple an SDR to a laptop running appropriate SW. The SW is free.
Either the AirSpy or SDRPlay are decent SDRs:


I know HRO carries the SDRPlay receivers. These are also quite reasonably
priced.

Dave - W?LEV

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Dave - W?LEV

Maybe , if you rig an antenna of some kind, directional? But why not use a radio or a tuned circui with detector or...??73'sRon W0QVJ

Yes, I forgot that option. A battery powered receiver tuned to the
frequency of the interference is an indispensable tool in hunting
interference.

Dave - W?LEV

On Fri, May 6, 2022 at 10:01 PM eyelessmisfit <eyelessmisfit@...>
wrote:

Maybe , if you rig an antenna of some kind, directional? But why not use a
radio or a tuned circui with detector or...? 73'sRon W0QVJ
-------- Original message --------From: Karel Gol <karelgol45@...>
Date: 5/6/22 10:56 AM (GMT-07:00) To: [email protected] Subject:
[nanovna-users] QRM searching? Can i use the nanoVNA to search for a QRM
source? As the simple person that i am, i am thinking about connecting an
antenna to S2 and trying to make something of the signal i'm getting. Does
the signal change when i walk around the neighbourhood, or when i point in
a specific direction etc... Is this possible and if so which format setting
should i use?

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


--
Dave - W?LEV

Minor point, but QRM is interference from other stations. QRN is interference from noise.

I read about i think the tinyVNA. Don't know the differences between the two. I bought my nanoVNA to tune the SWR of my antenna. Now i'm discovering other possibilties.

Think i'll go the SDR way as i allready have one. Now just getting/making a directional antenna. My son had brought his world receiver about a month ago and the interference is all over the frequencies. We suspect some converters of solar panels in the neighbourhood.

All the valid points and suggestions (tinyVNA, SDR, cheap receiver), just to add WHY nanonVNA is not a valid solution :)

Those three above "listen" to the signal and show something on screen are create audio that you can hear.

nanoVNA, on the other side, creates the signal and measures what comes back after reflecting from device being tested (1 port), or what passes through tested device (2 port measurement).

nanoVNA will "record" something if you use it in the way you want, but results will be very unpredictable :)

Think you mean *tinySA*, /not/ tinyVNA. (See /g/tinysa and )

Good luck chasing the QRM.

HTH, 73,

Robin, G8DQX

NanoVNA will only measure at the points to the display and skip all intermediate frequencies so you must be sure to match your frequency span with the number of measurement points and the bandwidth of the nanoVNA to avoid gaps.

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NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

On Sun, May 8, 2022 at 02:42 PM, G8DQX list wrote:

Think you mean *tinySA*, /not/ tinyVNA. (See /g/tinysa
and )

YES :)

Sometimes fingers faster then brain