On Mon, Jul 27, 2020 at 02:06 PM, Kurt Poulsen wrote:

Hi Erik

I slowly learn to treat the TinySA the right way.
One funny detail is that the vertical grid lines for the Log sweep show up when Center frequency is set to 0 and the span to max frequency.

The ini file need and update like Herb has pointed out as the Level per dB must be 32 and not 2 and Herb mention the -125 should be changed to -128 why I have not figured out.

Kind regards

Kurt

Kurt,
? When I originally ran TinySA.exe the levels displayed in the application were 3dB different than those on the tinySA display.? I questioned Erik about the difference and he said it was caused by the "zero level" value under the 'Settings'.

? Per Erik, "If you go to the setting tab in TinySA,exe the "zero level" should be set to 128".

?Also per Erik, "zero level' values other than '128' are an error in the initial automatic configuration of TinySA.exe.?

My understanding is the 'zero level' setting will be depreciated in a future TinySA.exe release.? Until then I've just make it a habit of changing the 'zero level' setting to '128' whenever I update the TinySA.exe application.

Further comments on TinySA.exe from Erik:

1.? Is there a tinySA.exe software manual available??

? ? ? ?"No tinySA.exe was my swiss army knife SW for SA experiments, too complex for anyone else. I still need to simplify and create some wiki pages"

2.? When I right click on the tinySA.exe screen and "select marker", I don't see a marker display.? I have yet to figure out how to turn markers on.

? ? ? ?"Only automatic markers are implemented. No manual markers yet"

Automatic markers are implemented by setting a threshold for marker display.? Manual placement is a much needed addition to TinySA.exe.

- Herb

Nice job, Kurt.

TinySA internal for calculation use measure?data * 32, for not send negative values additional add 128
This 32 multiplier need for not use slow floating point calculations, and give error 1/32 ~ 0,03 in dBm (measure step is 0.5dBm, and other is calibrations error)

And this values used for get correct data in program, need substract 128 and divide on 32

On Mon, Jul 27, 2020 at 01:50 PM, hwalker wrote:

The other reason is that DiSlord was part of the beta test team and contributed the same beautiful 3D UI and smoother fonts that are in his current releases for the NanoVNA families.

I also add better timing measure (CW freq sync), triggers, remove many slow floating points operations, speedup sweep speed, update graphic plot code, and UI

PS today i receive 2 tinySA v0.3 from Hugen :)

On Mon, Jul 27, 2020 at 11:13 AM, Dick wrote:

I just want to see how close they are.

I have a Siglent I bought recently, plus I am hoping to find a good used HP or something to get me up closer to 20 gigs.? As a beta tester, I have two tinySAs here now.?

But as soon as they were available for purchase, I bought one.? It's not a high-end device.? But for quick-and-dirty work, in that size package, and at that price, it's a real bargain.? I was amazed at all the features Erik managed to put in the firmware.? I'd find some feature in the tinySA and I'd think, "Does my Siglent do that?"? And most often the answer was no.? The tinySA is an amazingly feature-rich device.

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On Mon, Jul 27, 2020 at 11:27 AM, Bill Cromwell wrote:

I jumped on the nanoVNA and I got satisfaction right away. I am not so sure the tinySA will do the same for me. I have already started on a
homebrew SA to use with one of my O'scopes and based on a TV tuner with homebrew control and 'glue' circuits. The tinySA price is extremely
tempting. Maybe after it comes out with a four inch display.

Bill,
? I collected a box of cable and TV tuners that I had been intending to use in a similar project by Science Dynamics, or? some company with a similar name.? It would have been fun, but no way my DIY project could have come close to what Erik has packed into the tinySA.? What I really like, and what I hate the most about the NanoVNA-V2, is that you can control it using console commands like the NanoVNA which makes it a joy to experiment with.

? I wear glasses, but I don't feel the same eye strain using the tinySA as I do with the 2.8" NanoVNA.? I think its because the tinySA display is not as busy as the 4-traces on the NanoVNA.? The other reason is that DiSlord was part of the beta test team and contributed the same beautiful 3D UI and smoother fonts that are in his current releases for the NanoVNA families.

? ?At the current rate that the tinySA is selling on Alibaba, I'm sure that's incentive for Hugen to consider a 4" factor form device.? My crystal ball also tells me hugen and Erik will not just repackage the tinySA but, also update to a higher performance STM processor.? Erik will most likely add filtering and an adjustable attenuator to the HIGH port.? With another cycle of beta testing, the 4" version could be some months down the road.

? Of course my crystal ball could be dusty, and an interim product could appear with just a 4" display upgrade.

? - Herb

On Mon, Jul 27, 2020 at 11:13 AM, Dick wrote:

Considering the price difference between the tinySA and the Siglent is

about 14dB, I don't expect equal performance.

?

I just want to see how close they are.

?

Similar comparisons with the nanoVNA and high end VNA's were a real eye opener.

?

Dick,
? ?Nice dB comparison.? I also continue to be surprised by how functional the NanoVNA-F, NanoVNA-H4 and SAA2 are in comparison to their price.? I have a couple of higher end spectrum analyzers too, but a lot of my work is at HF so the tinySA is becoming more and more the first one I reach for in that range.

? I've always wanted a portable frequency response measurement device that worked above 100MHz that I could carry in my pocket when I attended swapfests.? The tinySA fits that bill with its built in calibrator output and LOW input.? I can't wait for hamfests to start back up in my county after this COVID-19 crisis subsides so I can head for the bargain tables and cherry pick items ;)

? The LOW input is where the tinySA shines because of its adjustable attenuator and filtering.? The HIGH input is wide open and without an external attenuator is prone to producing spurious signals.?

? The LOW output produces sinusoidal waveforms up to 350MHz. The output can be swept over a selected span within that range.? The output can also be AM or FM modulated and level swept from -6 to -76dBm.? I would have been intrigued by the device if only for its LOW output features.

- Herb

Hi,

I jumped on the nanoVNA and I got satisfaction right away. I am not so sure the tinySA will do the same for me. I have already started on a homebrew SA to use with one of my O'scopes and based on a TV tuner with homebrew control and 'glue' circuits. The tinySA price is extremely tempting. Maybe after it comes out with a four inch display.

73,

Bill KU8H

bark less - wag more

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On Mon, Jul 27, 2020 at 08:44 AM, Dick wrote:

...Must be my chomping at the bit to get my hands on it and compare?it to my new Siglent ...

?

==================================================

Dick,
? The tinySA will pale in comparison to your Siglent, but for a hobbyist or student that can't afford a $1000 instrument and wants to learn the basis of spectrum analysis measurements it will be a welcome purchase.

? I suspect after learning some of the uses of a spectrum analyzer with the tinySA, some hobbyist will graduate on to to Siglent, Rigol, or other higher performance analyzers.? Other users won't be able to justify the cost to their XYZ and will turn to DIY projects to enhance the use of the tinySA.?

?Erik already is thinking about a FW upgrade that will allow one tinySA to control another over the USB interface for a stepped faux tracking generator set-up.? Just a white board idea for now.

---

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Hi Dick,

I placed my order Saturday 25th, am (UK time).

73 Dave

?

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Thank You!

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To aid first time users I added a menu tree to the wiki


The various menu items are explain in one line of text. More information on menu items can be available under?