Erik- an insightful observation, I agree.

On Thu, Jul 23, 2020 at 10:48 PM, Erik Kaashoek wrote:

Mmm. I moved it to another name but can not find it anymore.

Here you go

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HBTE Files section:?/g/HBTE/files
Erik, PD0EK

Mmm. I moved it to another name but can not find it anymore.
Did you have a look in the groups file section?
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Erik, PD0EK

Hi Erik,

pl. can you post the link for github where to find the latest version of tinySA.ini /? tinySA.exe? and tinySA.ino working for TinySA with arudino zero .

Under this link "https://github.com/erikkaashoek/tinySA" I cannot see any of this files anymore.

Thank a lot!

Peter

Send me a private message
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Erik, PD0EK

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On Thu, Jul 23, 2020 at 07:33 AM, m0wid wrote:

Do we need to change the name or add something into our source code?? Certainly I would like to continue to use this group for discussion of homebrew test equipment, and hopefully hearing about your next experiments which may well inspire further projects!

The tinySA source code is GPLv3 and on github. See the FQA at the?
tinySA as a commercial product has its own discussion group at?/g/tinysa/topics
As I enjoy homebrewing I will still be following and contributing to this group.
You are free to use the name tinySA for homebrew projects but the name tinySA can not be used for a commercial spectrum analyzer product without explicit permission from the trademark owners
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Erik, PD0EK

I am sure you will run out of stock very quickly.

The ESP32 version we are developing we have currently called tinySA for ESP32, as really it is just your tinySA with a different processor and firmware.? I certainly have negative interest in making this into a product, for me it is purely for the fun of testing out the hardware and developing solutions, and making my own equipment (HBTE group after all).

Do we need to change the name or add something into our source code?? Certainly I would like to continue to use this group for discussion of homebrew test equipment, and hopefully hearing about your next experiments which may well inspire further projects!

Good luck with the venture, and well done to you and Hugen for getting it to market quickly.

Dave M0WID

The tinySA is available on Alibaba for for 50$ excluding shipping and handling
See "where to buy" on the tinySA wiki


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Erik, PD0EK

The LMK61E2 data sheet shows it to be very similar to the Si549, including the internals and foot print.

73, N7ISH

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On Tue, Jul 21, 2020 at 04:24 AM, m0wid wrote:

Nice find.? Parts of the code looks very familiar!? Wonder which came first.? Looking at the date I would guess the Visionary was first.

My thoughts exactly!!!

quite different code to drive it - John?

Not even going to contemplate it!

Thinking aloud here - if we had two SI4432 in RX but offset in receive frequency so only a small portion of the bandpass overlapped, then it may be possible to obtain a narrower resolution

Not even going to contemplate that either!!!

As I mentioned to Glenn in an email earlier, I'm perfectly happy having a basic fairly accurate SA. If I was getting paid for the time I've spent on this so far, I could have purchased a nice Rigol like Glenn has!!!

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John P.
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On Tue, Jul 21, 2020 at 04:32 AM, MVS Sarma wrote:

Costly, ut manageable at 1 off.if you can tolerate delay

I get a virus alert on that link!
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John P.
WA2FZW

Nice find.? Parts of the code looks very familiar!? Wonder which came first.? Looking at the date I would guess the Visionary was first.

It would be interesting to see if the different oscillator makes any significant improvement to performance, especially given the fairly wide minimum RBW.? For me the main improvement would have to be obtaining a narrower min RBW while keeping the low cost.? 2.6kHz is really too wide for some uses.? The SI4438 spec sheet states 1.1kHz min bandwidth and could be good for the receiver, seems to be available in a module at low cost.? Reduced frequency range so no good for the LO, quite different code to drive it - John?

Thinking aloud here - if we had two SI4432 in RX but offset in receive frequency so only a small portion of the bandpass overlapped, then it may be possible to obtain a narrower resolution but probably reduced dynamic range.? Really depends on how sharp the FIR filters are in the SI4432, and that needs measuring.? I think it can be measured by fixing the RX SI4432 frequency and then sweeping a signal from a signal generator across and recording the results.? Could be a paper/pen exercise (OK - Excel these days) or automated, which i plant to do at some time.

Dave

Thanks Elia, Farnell here can get them. But $33 in our $'s

The LMK61E2 is available from Mouser??and Farnell ?on?their UK sites. Not cheap but affordable, I have one in my parts stock-pile, must have bought it some time ago but don't remember what for... It is quite small indeed.

Don't know about that! I'm the software guy!? LOL!?
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John P.
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Glenn, I think you meant the Si4432; the 4302 is the attenuator.?

The code is on the page Elia provided the link to, so figuring out how to program the other LO should not be an issue.?
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John P.
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