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Re: Measuring resonant coil outputs

 

What frequencies are you targeting?
The supplied antenna is good for 50 MHz and higher but is a lot less sensitive for 10 MHz and lower
For low frequencies you better use a (home made) loop antenna
--
Designer of the tinySA
For more info go to


Measuring resonant coil outputs

 

Hi all,

I’m new to this group, a physicist by background but also new to using a spectrum analyser. Before I go and actually buy the Aursinc V0.3.1 model, I wanted to ask about how I might go about making measurements relevant to my research so I can be sure this is the best and most affordable approach.

To summarise, I am investigating resonance in coils driven at radio frequencies and high voltages and looking at the standing waves that result from certain coil configurations and wire lengths. To make it easier to show what I’m doing, I attach some graphics showing the circuit (without an output load), a typical coil configuration and an example of standing waves that show on a scope using a low-powered setup of 18V to the primary coil.

In particular, the queries I have are:

  • Can I detect what frequencies are emanating from the coils by using the supplied aerial placed within say 50cm of the coils?
  • What sort of attenuator would I need to cope with the high voltages and power in the secondary in particular?
  • Are there any others known about how are doing this type of measurements?
  • Will the tinySA-App work with Windows 10?

Thank you in advance for any help.

?

?
Julian Perry
Kerrowenergetics.org.uk


Re: TinySA ULTRA 4" - No longer works

 

Try:

Remove your SD card.

Clear configuration
Load defaults
Level calibration


On Thu, 03 Apr 2025 13:21:44 -0700
"Gerd via groups.io" <gerd.vipre@...> wrote:

Hi.

With nothing connected to the inputs and all default settings (after clear config)
I did a "clear config" again and was able to set the time and date correctly.
Last time I put a point between the dates and it broke the recording.

The remaining errors are the same.

Sincerely,
g.
--

73

-Jim
NU0C


Re: TinySA ULTRA 4" - No longer works

 

I wonder if there is a possibility that the firmware is corrupted in some way. Perhaps re-installing the same version of firmware might produce a clue?

Just my 2 cents!

Sam Reaves
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On Thu, Apr 3, 2025 at 4:21?PM Gerd via <gerd.vipre=[email protected]> wrote:
Hi.
?
> With nothing connected to the inputs and all default settings (after clear config)?
?
I did a "clear config" again and was able to set the time and date correctly.
Last time I put a point between the dates and it broke the recording.
?
The remaining errors are the same.
?
Sincerely,
g.
?


Re: Auto Save Issues

 

Basically I want to save continuous traces as fast as the TinySA ultra allows until the SD card is filled. With the autosave function the fastest it goes is 1 save every 30 seconds. When I manually press trace to SD I can create a new save about every 3 seconds. My scan time for the desired data is 270 ms.? What settings can be used to make the autosave function run as fast as possible? I am not worried about using up the entire SD card rather quickly. I actually expect this.??
Best to you and thanks,
James


Re: TinySA ULTRA 4" - No longer works

 

Hi.
?
> With nothing connected to the inputs and all default settings (after clear config)?
?
I did a "clear config" again and was able to set the time and date correctly.
Last time I put a point between the dates and it broke the recording.
?
The remaining errors are the same.
?
Sincerely,
g.
?


Re: Auto Save Issues

 

The fastest I have been able to get it to save is in 30 second intervals. Is faster possible? Would this require going into the internals settings? I can manually press save twice faster than 30 seconds, so I know the system has the capability to save data faster than 30 second intervals. Thank you for your response.?


Re: Zelftest 3: signal level critical

 

Critical is not failing, just a warning some test is on the edge
?
If you still worry, follow the fault finding as described on this page.
to get your confidence back
--
Designer of the tinySA
For more info go to


Zelftest 3: signal level critical

 

Heb de TinySA ultra nog niet heel lang. Maar zie dat de zelftest faalt
Zelftest 3 geeft signal level critical
?
Ook met het vervangen van de kabel.
Ik ga er eerst maar vanuit dat ik iets verkeerd doe.
Iemand advies of heb ik zo heel snel iets opgeblazen?
?
Johan


Re: Auto Save Issues

 

0.5 s is too quick, slower is possible
--
Designer of the tinySA
For more info go to


Re: TinySA ULTRA 4" - No longer works

 

With nothing connected to the inputs and all default settings (after clear config)? the screen should look in a certain way.
It should be like the first picture on this wiki page
If this is different than please post a photo where I can read the dBm scale numbers as they were very weird
--
Designer of the tinySA
For more info go to


Re: TinySA ULTRA 4" - No longer works

 

Hi.
?
> I meant to say: Can you push the jog button to the side (NOT down) WHILE RESTARTING the device?
?
Yes, I held the rotary knob on the right side and then started the device until the image appeared on the screen.
I also did it while holding rotary knob on the left side. The situation does not improve.
?
Is there any other test or electronic circuit to measure ?
(I have several Keysight lab measuring instruments)
?
Sincerely,
?
g.
?
?
?


Re: Input RF switch fault found on TinySA ultra

 

I managed to change my lna and input switch with a tiny iron and Chipquick removal alloy. Doubtless, I was just lucky but it can be done that way.?
Ross


Re: Auto Save Issues

 

Any input on how to save traces every 500 ms would be greatly appreciated. I've messed with all the settings to no avail. My best guess to to try to write a python program to tell the tinySA to save every 500 ms. Again any thoughts on solving this issue is appreciated.


Re: TinySA ULTRA 4" - No longer works

 

On Thu, Apr 3, 2025 at 06:14 AM, Gerd wrote:
Can you push the jog button to the side (NOT down) and restart the device?
I meant to say: Can you push the jog button to the side (NOT down) WHILE RESTARTING the device?
So keep it pushed to the side until the full display appears.
--
Designer of the tinySA
For more info go to


Re: TinySA ULTRA 4" - No longer works

 

Hi.
?
> Can you push the jog button to the side (NOT down) and restart the device? This should restore the normal scan display
I did, but it doesn't change the situation.
?
> Did you connect CAL and RF with a short coax cable when doing the self test?
Yes, I took a picture of that too
?
At the moment it seems that the fault is with the hardware, can the hypothesis be tested ?
?
Sincerely,
?
g.


Re: TinySA ULTRA 4" - No longer works

 

Can you push the jog button to the side (NOT down) and restart the device?
This should restore the normal scan display
Did you connect CAL and RF with a short coax cable when doing the self test?
--
Designer of the tinySA
For more info go to


TinySA ULTRA 4" - No longer works

 

The device was purchased on 2023.12.10 from the official AliExpress store "Zeenko Store".
I used the device a couple of times during the entire period and was satisfied with the device.
In 2024, I updated the software and everything worked correctly.
?
In other words, the device was in its box for six months and now when I started the device, something happened to the hardware, because almost all the circuits are out of order.
I also did a "Clear Config" and removed the battery from the device for a few hours, but that didn't fix the situation.
?
Additionally, I noticed:
* The device will no longer save changes to the time and date.
* Windows computer no longer connects to device
* "PRESET" - "LOAD FROM SD" - "ERROR NO CARD" (32GB SD card is actually fine)
?
Has anyone else experienced this error and can it still be repaired ?
?
I'm attaching some pictures of the device's condition.
?
Sincerely,
g.
?


Locked Help ! Calling Ghostbusters.

 

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Hi.


The situation you have is - honestly - a nightmare.


With so many clients in a mesh network you mess up a lot of theoretically available bandwidth, so I am not really surprised about your problems.


As you already found out, your home theater(?) worked lots better since you changed the smart relay mode and it got worse when many clients in small time window are turned on.? That is the consequence of using WiFi.

It is not only the number of MAC addresses. On every power-on every device initiates a long sequence: It enables WiFi, then it searches for available networks, then it starts to connect to this network, then it starts requesting an IP address (if you are running on DHCP). Imagine the amount of network traffic for that!

After the device is successfully registered and connected, you still have the situation that lots of traffic moves forward and backwards through the mesh and that all APs have to talk permanently to each other (exchanging mAC addresses and signal quality of every MAC to control handover).
If your central "smart controller" is located on the other end, you increase the problem, as every packet has to be forwarded again and again...


So I do not really wonder about your issues, but I am very, very sure this is not caused by something you can solve with a tinySA*. This is mostly the internal function of WiFi, with and without mesh (doesn't really matter with not moving clients).


The only way you can get this nightmare under control is installing lots(!) of LAN cables?and install some more APs (using this LAN cables as backbone to the central switch and smarthome controller. I know, you don't want to hear that, but there is no other way. This LAN cables drastically reduce the WiFi traffic, and a LAN cable is also LOTS faster (GBit or even higher) and has a lots lower overhead and latency, this is a huge improvement. But don't do it wrong and install a chain of LAN network switches, you need a star architecture.


It is also good advise to enforce smaller wifi-meshes, so every mesh has less clients/MAC addresses inside. Configure different WiFi SSIDs, so you gain control over where a client can connect at all. So the mesh traffic will be reduced to inside every mesh, only packets that belong to outside the mesh will leve it, but using the LAN cable.?? -> This is the correct way. If and how you tell this your APs you have to tind out by yourself. They must NOT use radio as backbone to outside their mesh(es), only LAN cables.


You may configure two virtual WiFi networks on your APs, one for the individual "smart stuff" mesh (use different names to enforce small areas to enforce where?a client can connect at all), and another one for "human use" (one huge SSID and mesh across entire site, so you can walk around with your mobile phone, laptop, ...) without disconnects. This virtual meshes must not be interconnected inside any AP with the "human mesh", they have to run completely isolated. And try to keep the number of "smart clients" below 80 (because of MACs). If this doesn't work with your APs, you need two APs one for every mesh.


This I see as absolutely mandatory. What you try right now has no realistic chance to work properly. You will notice a drastic improvement when doing it this way. Without splitting all this into smaller sections and using high effeicient backbones (Copper) I see no real chance that you can solve your issues.



Am Mittwoch, 2. April 2025, 22:17:24 CEST schrieben Sie:

> Thanks. I'm unfortunately well aware of the MAC address limits. The Ubiquiti

> APs I use advertise being able to support 200 to 350 clients each. I tested

> this, but this is not reality. When I disabled all but one AP, 120 clients

> on the 2.4 GHz band is the maximum the lone AP could handle. Subsequent

> connections were rejected, with a smartphone located near the AP getting an

> authentication error when trying to connect. I filed a case with Ubiquiti

> and they claim they do this because airtime is likely to become the

> bottleneck with this many clients. It may be true, but their specs are

> still false advertising. I don't have nearly enough 5 GHz clients to see if

> the same MAC address limit applies to that band. I could easily test

> whether the airtime is the bottleneck by placing 2 APs next to each other

> on the same channel, and seeing if I can get more than 120 clients to

> connect, between the two of them. I haven't taken the time, but I strongly

> suspect I would get >120.

>

> While the clients are numerous, most of them are lightbulbs, which are very

> low bandwidth, and support only 2.4 GHz channels. For example, my porch

> light Wifi bulb, which is connected to Wifi 24/7, averages 135 bps for the

> last 24 hours in the Unifi controller. A good chunk of that traffic is

> likely from smokeping that I have been running to track packet loss and

> latency. I disable/enable smokeping periodically for testing purposes. It

> significantly increases traffic as it will be pinging all devices, but is

> not the root cause of the Wifi problems.

>

> I am not using repeaters, but I'm using a mesh network, because I only have

> Ethernet plugs in 2 indoor locations on the same bottom floor, when there

> are 17 indoor locations to be covered, and many more outdoors (I haven't

> kept a count).


Rainer



Locked Re: Help ! Calling Ghostbusters.

 

The content of this topic does no longer fit in the purpose of this group so I'm closing it.
--
Designer of the tinySA
For more info go to