I have a separate issue regarding FW update.
I just received my wonderful TinySA basic. Working fine, but thought I would update the FW.
Used the STMC Cube Programmer.

But it failed half way with some sector failure.

Now get the white screen. Tried the VDD/Boot0 short, but still white screen. Also disconnected the battery too. No luck.
Obviously I cannot go to the DFU screen.

Any help?

Thanks
Steve

As for being able to see what's out there, the RTL-SDR can't be beat. Just make sure you get one of the real McCoy's, see rtl-sdr -dot-com. Pair this gem with PDW, an open-source offering from discriminator -dot-nl and among other things you'll see lots of POCSAG and FLEX transactions, many of which you might have wished not to see. Yes, those old 900 MHz pagers are very much in use today.

TinySA (Ultra) is so much more than a wonderful tool precursor to assist using the SDR. Cheers, Erik and community. FYI/just a friendly thought.

You have not told us where you are. In the USA that band segment is allocated to land mobile. 454 MHz is a common area for pagers, which are digital these days. 460 MHz will have 2-way land mobile activity. Some of it digital with maybe some analog stragglers. If you are near a city center or a repeater site you could have quite strong signals.

If you really want to nail it down you need a Yagi or a DF loop.

73

-Jim
NU0C

On Sun, 10 Mar 2024 14:10:55 -0700
"bench builder via groups.io" <bench.build.0i@...> wrote:

400 MHz IR-UWB is absolutely being used today due to it's ability to penetrate non-metal structures. There are articles about use for survivor detection. And, here's a nature article about figure detection & passive vital sign monitoring through walls:

We've determined frequencies for everything we have emitting signals. It's nothing of ours. And, the signal is way too strong to be a more pedestrian item in a next door home given distance between houses.

There are reasons I won't detail that suggest nefarious neighbor activity. So, with that context, what are some possibilities?

--

73

-Jim
NU0C

Thanks to Joe for the video link about identifying signals. Searched my zip code for 453-455 MHz or 459-461 MHz licenses and there are none. Found this example of a wireless packet - data transmission network usually used by police, military, etc. that sounds very similar to the audio we've captured:

One RF engineer I spoke to recently suggested this looked like radar/telemetry pings and packet transmission. So, this seems to fit. The 454 seems like it may be the packet transmission and the 460 blips could be the radar/telemetry pings.

Does anyone have direct experience with the appearance of radar/telemetry signals and packet transmission on a spectrum analyzer (TinySA or other)?

It could be worse.

There's the fruitcakes that peddle the electrosensitivity nonsense too.

Give them a tiny sa and they'll be dangerous ?

73 de Andy?

On Sun, Mar 10, 2024 at 09:10 PM, bench builder wrote:

400 MHz IR-UWB is absolutely being used today due to it's ability to penetrate non-metal structures

Agreed, things have moved on since I last looked at this subject, so that's one of several new things I have learned today.

I found this blog article which gives a brief overview of various technologies, but ignore the poor graphics.

https://www.kentfaith.co.uk/blog/article_cameras-that-can-see-through-walls_587

The method I recalled was Passive millimeter wave imaging, and not Ultra-wideband radar imaging, which was the technique you mentioned

Personally, I'm still sceptical that it is what you think it is, but I'm always curious, so be sure to let us all know when you figure out what it actually turns out to be.

Regards,

Martin

400 MHz IR-UWB is absolutely being used today due to it's ability to penetrate non-metal structures. There are articles about use for survivor detection. And, here's a nature article about figure detection & passive vital sign monitoring through walls:

We've determined frequencies for everything we have emitting signals. It's nothing of ours. And, the signal is way too strong to be a more pedestrian item in a next door home given distance between houses.

There are reasons I won't detail that suggest nefarious neighbor activity. So, with that context, what are some possibilities?

Watch this YouTube:



A great resource to watch if you are trying to identify a signal local to your zip code or area.

Joe, K1ike

On Sun, Mar 10, 2024 at 05:49 AM, bench builder wrote:

Could this be UWB radar similar to that used by military and law enforcement to create visual representations of any people behind walls in non-metal structures?

NO

These systems use very high frequency microwave signals, which are way, way above the upper frequency limit of the TinySA.

I think what you are seeing and hearing, is locally generated. The 'swooshing' noise you are hearing is due to the sweep rate of your TinySA. If you change the sweep rate or reduce the frequency range you are viewing, and if you vary the sweep rate, it may become more obvious what the signal actually is, and where it is coming from. When listening, you should tune directly to the signal centre frequency and use zero span.

I assume you are using the supplied mall whip antenna, in which case you may actually be picking up some interference from the TinySA itself. However, it is more likely that it is emanating from an electronic item somewhere around you or your immediate neighbour's homes.

Allocations vary from country to country, but these sorts of frequencies are used by short range radio control devices, and for industrial purposes such as collecting telemetry from remote power and water installations, or the control of temporary traffic lights etc.

Regards,

Martin

Using the tinySA Ultra, I've observed a cycle that repeats itself continuously – a short 454 MHz signal followed by very short flickering bursts at 460 MHz (see first video link):

I used listen mode and recorded the audio of the longer 454 MHz signals which sounds like a repetitive whoosh or pulse (see second link for audio):

Note LNA is OFF. These are actual dBm readings which have been as high as -50 by our north wall.

Could this be UWB radar similar to that used by military and law enforcement to create visual representations of any people behind walls in non-metal structures?

All opinions about what the signal pattern might be are appreciated.

I second R&L. They are a USA vendor with a very good reputation. Support your local vendors!

73

-Jim
NU0C

On Sat, 09 Mar 2024 06:30:29 -0800
"Roger Hartel" <naples08@...> wrote:

R&L electronics.

On Fri, Mar 8, 2024, 9:19?PM J. chang <felix1063@...> wrote:

Hello All,

I am interested in purchasing one of the Tiny SA Ultra units. Can
somebody direct me toward an official re-seller(s) of the unit either in or
can ship to the USA. I do not want a clone.

Also, what is the latest update for the original Tiny SA (genuine) that
can be loaded with a Windows machine?

Thank you.

--jeff

--

73

-Jim
NU0C

Yep.? I just ordered an Ultra from AliExpress using the link on the tinySA.org website. Paid via Paypal.? Ordered a couple of appropriate attenuators as well.? I've ordered other similar items from AliExpress in the past and it was all good.? Usually took ~2wks to get stuff.?

--
Lou W7HV

开云体育

It's in the wiki:

???

Hello All,

I am interested in purchasing one of the Tiny SA Ultra units.? Can somebody direct me toward an official re-seller(s) of the unit either in or can ship to the USA.? I do not want a clone.

Also, what is the latest update for the original Tiny SA (genuine) that can be loaded with a Windows machine?

Thank you.

--jeff