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Re: VBW influence

 

Lots of good tutorials on YT University...
https://www.youtube.com/results?search_query=understanding+spectrum+analyzer
RADIATED EMISSIONS FROM TINYSA-ULTRA

 

The question regarding radiated emissions from the TinySA - Ultra originated over on the NanoVNA users group.? I have three (don't ask) TinySA Ultras.? I checked all three employing the identical setup I used to evaluate radiated emissions from the NanoVNAs (nothing on the electronic work bench has changed in the intervening 2-days).? Please refer to the "ADDEMDUM" posting on the NanoVNA-users groupio in that regard for setup.

I'm happy to report, with that setup identical to my evaluation of REs from the NanoVNAs, the TinySA - Ultras (at least the three I own - don't ask) are squeaky clean and exhibit absolute minimal radiated emissions.? Even though they are not required to pass Part 15 of the FCC rules (as test equipment, they are subject to Part 18 which is considerably more liberal), I'm sure they would pass with flying colors.

Again, this quick evaluation of RE from the TinySA - Ultras in no way, shape, or manner, intentional or unintentional, reflects anything to address regulatory RE levels. ?

Dave - W?LEV
Re: TinySA Ultra generates signals while sweeping

 

Any tests of the TinySAs will be posted on that dedicated site, not here.l

Dave - W?LEV


On Thu, Jun 6, 2024 at 6:27?PM W0LEV via <davearea51a=[email protected]> wrote:
Take a visit to the McGeevy site.? The following should get you going:

????

There's also a link at the very bottom that is of interest.

We are addressing electromagnetic energy at AUDIO frequencies.? Some may even be detected by connecting a long wire or loop to the sound input to any PC or laptop.

Dave - W?LEV

On Thu, Jun 6, 2024 at 4:21?PM Bruce Hawkins via <ac6dn=[email protected]> wrote:
A lot of my HF HAM radios work down there. But there specs aren't guaranteed. I've never tested them down there as well. But they go quite low. The next real problem is the antenna. For the SA or the HF receiver (30, 100kHz is not uncommon).

Bruce Hawkins AC6DN


On Wednesday, June 5, 2024 at 09:48:30 AM CDT, Matt Harris <kd4pbs@...> wrote:


?On Mon, Jun 3, 2024 at 08:02 PM, vbifyz wrote:
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

Now that I have had a day (and morning coffee) I see that?I am the one who also didn't detect the sarcasm font ;)? Ha!? Thanks, Mike!

On Tue, Jun 4, 2024 at 11:29 AM, Bruce Hawkins wrote:

big radio noises heard coming from Earth.

This info about the VLF signals is interesting.? Too bad the TinySA is virtually deaf at these frequencies, but understandably; a highly sensitive and selective VLF/ULF receiver is oddly difficult (read "expen$ive) to create.



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Dave - W?LEV




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Dave - W?LEV
Re: TinySA Ultra generates signals while sweeping

 

Take a visit to the McGeevy site.? The following should get you going:

????

There's also a link at the very bottom that is of interest.

We are addressing electromagnetic energy at AUDIO frequencies.? Some may even be detected by connecting a long wire or loop to the sound input to any PC or laptop.

Dave - W?LEV


On Thu, Jun 6, 2024 at 4:21?PM Bruce Hawkins via <ac6dn=[email protected]> wrote:
A lot of my HF HAM radios work down there. But there specs aren't guaranteed. I've never tested them down there as well. But they go quite low. The next real problem is the antenna. For the SA or the HF receiver (30, 100kHz is not uncommon).

Bruce Hawkins AC6DN


On Wednesday, June 5, 2024 at 09:48:30 AM CDT, Matt Harris <kd4pbs@...> wrote:


?On Mon, Jun 3, 2024 at 08:02 PM, vbifyz wrote:
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

Now that I have had a day (and morning coffee) I see that?I am the one who also didn't detect the sarcasm font ;)? Ha!? Thanks, Mike!

On Tue, Jun 4, 2024 at 11:29 AM, Bruce Hawkins wrote:

big radio noises heard coming from Earth.

This info about the VLF signals is interesting.? Too bad the TinySA is virtually deaf at these frequencies, but understandably; a highly sensitive and selective VLF/ULF receiver is oddly difficult (read "expen$ive) to create.



--
Dave - W?LEV
Re: Display replacement

 

On Thu, Jun 6, 2024 at 10:08 AM, <GamzeeMakara2000@...> wrote:
7 inches?
Which monitor exactly? Where buy?
? If you are referring to the LiteVNA64 then go to /g/nanovna-beta-test/ subscribe to the group and search the message base for "Test 7 inch screen".

? If you are referring to the tinySA Ultra, then see Stan Dye's reply at /g/tinysa/message/16968?


Herb
Re: Display replacement

 

7" is still experimental,? requires significant hardware technical skills to install on litevna64.? Only one person has done it that I am aware of,? in? nanovna-beta group.


On Thu, Jun 6, 2024, 11:08 AM GamzeeMakara2000 via <GamzeeMakara2000=[email protected]> wrote:
7 inches?
Which monitor exactly? Where buy?
This made life easier for blind grandfather...

Re: TinySA Ultra generates signals while sweeping

 

On Thu, Jun 6, 2024 at 04:21 PM, Bruce Hawkins wrote:
But they go quite low. The next real problem is the antenna. For the SA or the HF receiver (30, 100kHz is not uncommon).
Most of the PA0RDT type E-Probe antennas will work down to at least 10kHz, but noise and interference is a problem in Urban environments.

If you are really keen, you can try to hear the Earth's Shumann resonances at around 7, 14 and 20Hz, YES, I did mean Hz.



These folks mange to do it.



Regards,

Martin
Re: Display replacement

 

7 inches?
Which monitor exactly? Where buy?
This made life easier for blind grandfather...
Re: TinySA Ultra generates signals while sweeping

Bruce Hawkins
 

Hi Dave,

Some people are actually sensitive to RF. But it usually, Watts's of power. Not necessarily meant to be a joke.

Bruce Hawkins AC6DN


On Monday, June 3, 2024 at 02:16:06 PM CDT, W0LEV <davearea51a@...> wrote:


Rabbit holes are for rabbits.? Rabbit holes are not for thinking intelligent humans.? That is, unless you require an exercise in frustration and pulling your hair out (us fossils don't have to indulge in the latter - nature takes care of that for us).?

Dave - W?LEV ?

Virus-free.


On Mon, Jun 3, 2024 at 6:22?PM Sam Reaves via <sam.reaves=[email protected]> wrote:
Not to mention all of the above ground nuclear testing during the late 1940's thru the 1960's prior to the nuclear test ban treaty!

Sam Reaves
ARS W3OHM
Owner / Moderator of:
LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io
Sprint Layout Group on Groups.io??
Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)



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Dave - W?LEV
Re: Display replacement

 

I had feared that might be the case?
Re: TinySA Ultra generates signals while sweeping

Bruce Hawkins
 

A lot of my HF HAM radios work down there. But there specs aren't guaranteed. I've never tested them down there as well. But they go quite low. The next real problem is the antenna. For the SA or the HF receiver (30, 100kHz is not uncommon).

Bruce Hawkins AC6DN


On Wednesday, June 5, 2024 at 09:48:30 AM CDT, Matt Harris <kd4pbs@...> wrote:


?On Mon, Jun 3, 2024 at 08:02 PM, vbifyz wrote:
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

Now that I have had a day (and morning coffee) I see that?I am the one who also didn't detect the sarcasm font ;)? Ha!? Thanks, Mike!

On Tue, Jun 4, 2024 at 11:29 AM, Bruce Hawkins wrote:

big radio noises heard coming from Earth.

This info about the VLF signals is interesting.? Too bad the TinySA is virtually deaf at these frequencies, but understandably; a highly sensitive and selective VLF/ULF receiver is oddly difficult (read "expen$ive) to create.
Re: Display replacement

 

For the similar nanovna, each different screen size requires different firmware modifications - they have done the 2.8", 4", and recently adapted a 7" display to the newer litevna.? So it is highly unlikely that there is any plug-n-play larger screen for the tinySA.?


On Thu, Jun 6, 2024, 9:31 AM m0cnl via <m1cxz.m0cnl=[email protected]> wrote:
Just had the thought that maybe if the display uses spi, then something designed for an arduino or raspberry pi could be used.

?I may be way off in my thinking there, but it certainly seems feasible.

Paul

Re: Display replacement

 

Just had the thought that maybe if the display uses spi, then something designed for an arduino or raspberry pi could be used.

?I may be way off in my thinking there, but it certainly seems feasible.

Paul
Display replacement

 

Beauty of this device is its mobility!
And I wouldn't want to lose this...
A PC is good, I use it to set up presets for myself, but usually I¡¯m away and don¡¯t have the opportunity to use it. Hmm...Is it possible to somehow use the monitor separately? What is needed for this?
Re: VBW influence

 

I have viewed the VBW as a post-detection "filter" or smoothing function.? A possible example might be a receiver with a tone control.? That control works only on the demodulated audio.? When rotated to suppress higher frequencies, it "filters" or smoothes the high frequencies such that the resulting audio is now lacking much of the higher frequencies.? As such, if one displayed the result on an o'scope, it would look smoother with less high-frequency (audio) spikes.? Look at the VBW as a smoothing or somewhat of a averaging function operating only at audio frequencies.

Dave - W?LEV ? ?


On Thu, Jun 6, 2024 at 10:44?AM scnuzmj via <scnuzmj=[email protected]> wrote:
Hi expert

I have confusion about the infulence of VBW, in my knowledge, according to the block diagram of the spectrum analyzer, when VBW > RBW, the bandwidth of VBW will great than the video signal(limited by RBW), so the video filter will not filter the video signal, then the change of VBW(still great than RBW) should not affect the smooth effect of the trace. But the actual display is not suitable for this guess, I think I must miss something about video filter.

So, pls help! any explanations are welcome£¡



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Dave - W?LEV
Re: Display replacement

 

Have you considered pc control?
What you lose in portability you will gain back far more in screen size.?

Paul
Display replacement

 

First of all, I want to thank Eric for his work and creating this device! Thank you! I actively use it in my creations and in teaching.

But I'm a pretty blind guy... I want to insert a larger display. Please tell me the datasheet for the pins of the cable so that I can choose a larger display and it will work.

Please help, I'm tired of sitting with a magnifying glass...

TNX!
Re: Attenuator needed for my purpose?

 

Well, that's very cool, Dave!? I have indeed worked on many of the models of transmitters and receivers over the past 30 years that company has produced.? Anything rugged enough to mostly survive "normal use" from a TV news anchor or videographer for more than a year is a notable piece of equipment in my book, so thanks for your contributions!

Derek, you know what they say about assuming ;)? ?I would never have assumed there was not an earlier company called, "Lectronics" which perhaps was absorbed later in life by some other company, forming the wonderful wireless mic company which Lectrosonics is.? By the way, is that a Nagra I spy in your profile picture?


73,
Matt
Re: updating firmware with cudeide

 

have a look to:
/g/tinysa/files/Firmware_Programming
maybe it helps..
VBW influence

 

Hi expert

I have confusion about the infulence of VBW, in my knowledge, according to the block diagram of the spectrum analyzer, when VBW > RBW, the bandwidth of VBW will great than the video signal(limited by RBW), so the video filter will not filter the video signal, then the change of VBW(still great than RBW) should not affect the smooth effect of the trace. But the actual display is not suitable for this guess, I think I must miss something about video filter.

So, pls help! any explanations are welcome£¡
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