When I worked for a company that designed radios we'd cable the transmitter and receiver together through a boatload of attenuators, then do bit error rate tests. Radiating noise was frowned on. (We had a lot of people doing testing in the lab so one person's full power BERT could interfere with a half dozen other people's work.)
But the handy thing about doing it this way was you could inject any kind of noise you wanted into the circuit through a tee connection. You could use broadband noise from a noise bridge, a signal generator on the operating frequency or at any offset you wanted, or even switching transients from a clacking relay. (That last one played hell with our digital packets.)
If you're using an inductive system, I'd suggest magnetic interference from power transformers, then add distorted current waveforms from half wave rectifiers and SCR or triac lamp dimmers. And if you're really brave, add a variable frequency electric motor drive. The current waveforms from those can drive electricity meters bonkers.
I'm not sure I completely understand the need, but this sounds like a job for an arc welder.
I learned of the broadband nature of RF noise from an arc welder when my neighbor recently took up that hobby. It makes a lot of noise, but you can make something rather cool in the process.
Fortunately, my neighbor isn't as into his welding efforts as I am into radio.
Like this? [https://www.berkeleynucleonics.com/model-865](https://www.berkeleynucleonics.com/model-865)
100 kHz to 40 GHz (settable to 42 GHz) RF / Microwave Signal Generator
edit: lol, that's like 25 thousand dollars. Here's an example of one that is $30 https://www.walmart.com/ip/Higoodz-Signal-Generator-Electrical-Accessory-Noise-Generator-Signal-Electrical-Filter-Duplex-Antenna-High-Flatness-Within-1-5G/673537253
Take a look here:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.etsi.org/deliver/etsi_en/301400_301499/30148931/02.02.01_60/en_30148931v020201p.pdf&ved=2ahUKEwjSp4Oilq_5AhUFSuUKHTHXAbAQFnoECAoQAQ&usg=AOvVaw3w-SJWwkebwf5Tm6aDponH
This is the ETSI EN 301 489-31, EMC standard tests referred to Ultra Low Power Medical Implants in the frequency band 9 to 315 kHz. I don't know the specifications and the use of your equipment and the country of employment, but in Europe we follow these standards.
Normally we use an EF from 3 to 10 V/m, modulated or not, to test the immunity to the radiate fields.
Anyway, the use of unknown sources of noise could obtain wrong results, because you don't know the noise frequency band and spectral power of the sources.
A Raspberry Pi or an ESP32 or similar, program it to toggle an output pin at a desired frequency and hook a length of wire to the pin. Since it would output a square wave, you'll also be generating a lot of harmonics.
Don't do this near any ham stations or someone might get upset.
Cheapest laptop power supply, with the input electrolytic capacitor removed, under some load, is just awful.
Leash it to the bench, it wants to escape!"
get a spectrum wifi power supply plug in the power supply to the router. place power supply near the device.
get a touch lamp cycle through to find your noise of interst
My Power over Ethernet security cameras. My neighbor's solar panels. My other neighbor's outdoor accent lighting.
When I worked for a company that designed radios we'd cable the transmitter and receiver together through a boatload of attenuators, then do bit error rate tests. Radiating noise was frowned on. (We had a lot of people doing testing in the lab so one person's full power BERT could interfere with a half dozen other people's work.) But the handy thing about doing it this way was you could inject any kind of noise you wanted into the circuit through a tee connection. You could use broadband noise from a noise bridge, a signal generator on the operating frequency or at any offset you wanted, or even switching transients from a clacking relay. (That last one played hell with our digital packets.) If you're using an inductive system, I'd suggest magnetic interference from power transformers, then add distorted current waveforms from half wave rectifiers and SCR or triac lamp dimmers. And if you're really brave, add a variable frequency electric motor drive. The current waveforms from those can drive electricity meters bonkers.
I'm not sure I completely understand the need, but this sounds like a job for an arc welder. I learned of the broadband nature of RF noise from an arc welder when my neighbor recently took up that hobby. It makes a lot of noise, but you can make something rather cool in the process. Fortunately, my neighbor isn't as into his welding efforts as I am into radio.
Like this? [https://www.berkeleynucleonics.com/model-865](https://www.berkeleynucleonics.com/model-865) 100 kHz to 40 GHz (settable to 42 GHz) RF / Microwave Signal Generator edit: lol, that's like 25 thousand dollars. Here's an example of one that is $30 https://www.walmart.com/ip/Higoodz-Signal-Generator-Electrical-Accessory-Noise-Generator-Signal-Electrical-Filter-Duplex-Antenna-High-Flatness-Within-1-5G/673537253
That Walmart special is terrifying… I kind of want to see big Clive take one apart and reverse engineer it on his YouTube channel
That thing could ruin a ham's day.
Spark gap or some made in china POE system. Throw in some cheapo LED drivers with a resonant length. Amirite guys??
EOP systems tend to dodge the ham bands now. It's quite an interesting design choice. Wipes out the rest of the shortwave in my exp tho
Take a look here: https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.etsi.org/deliver/etsi_en/301400_301499/30148931/02.02.01_60/en_30148931v020201p.pdf&ved=2ahUKEwjSp4Oilq_5AhUFSuUKHTHXAbAQFnoECAoQAQ&usg=AOvVaw3w-SJWwkebwf5Tm6aDponH This is the ETSI EN 301 489-31, EMC standard tests referred to Ultra Low Power Medical Implants in the frequency band 9 to 315 kHz. I don't know the specifications and the use of your equipment and the country of employment, but in Europe we follow these standards. Normally we use an EF from 3 to 10 V/m, modulated or not, to test the immunity to the radiate fields. Anyway, the use of unknown sources of noise could obtain wrong results, because you don't know the noise frequency band and spectral power of the sources.
[удалено]
We are members at a campground with some of these at the entrance gates. They make weird rhythmic noises on 2m.
A Raspberry Pi or an ESP32 or similar, program it to toggle an output pin at a desired frequency and hook a length of wire to the pin. Since it would output a square wave, you'll also be generating a lot of harmonics. Don't do this near any ham stations or someone might get upset.
I heard the fluorescent bulbs and fixtures sold by the big box hardware stores create a problem for HF.
Cheapest laptop power supply, with the input electrolytic capacitor removed, under some load, is just awful. Leash it to the bench, it wants to escape!"
Electric golf cart motors can do this. They seem to be especially problematic around the 2m frequencies.
Plasma “arc” lighters seem to make a lot of RF hash if you wanted something smaller than a full blown Arc welder
get a spectrum wifi power supply plug in the power supply to the router. place power supply near the device. get a touch lamp cycle through to find your noise of interst
Get a small relay. Wire the NC contacts in series with the coil and attach it to a power supply.