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Watch the video
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Thanks Eric.? Connecting the HIGH and LOW ports enabled all self-tests to pass.? Now I am supposed to do a LOW level calibration.? Do I leave the HIGH and LOW ports connected via cable for this step also?? Web page doesn't say disconnect cable, but want to make sure I am not assuming something.

Yes, I would agree on going for the refund, but if one was left with an unuseable carcass, it seems a pity to confine it to the Universal Storage System. I suppose the battery and screen might be useful as spares for future need.

If everyone with a clone demanded refunds and made a big fuss, then the Tinysa clones might die out.

Steve L

Please read at least this page?https://tinysa.org/wiki/pmwiki.php?n=Main.FirstUse
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I know I need the read the manual, but with this talk of clones I wanted to do a quick check on my TinySA.? I tried running Self-Test from the menu but got some errors, with the errors suggesting I need to have the connections (Hi/Lo) connected or configured in some way other than both open.

What connections should be made when running the self-test, if any?

Also, I saw another message saying that the Tiny SA "HIGH" port was not yet usable.? Should I be only using the LOW port at this time?

On Wed, Dec 23, 2020 at 11:13 AM, Stephen Laurence wrote:

What exactly is it that is failing, as all clones seem to have the same screenshot which should be a bandpass but looks like a flat response with a kink in it.

Are the 400mhz saw filters missing?

Can they be inserted, as presumably the circuit board will have been copied from original, so presumably there would be space to insert them.

Steve,
? ?Erik spent a lot of time engineering the BPF and that knowledge cannot be copied as easily as cloning a PCB.? The tinySA hardware is not open source so I would think any cloner would have a hard time getting all the nuisances exactly right.? In addition? to the band pass filtering, there is the question of what degree the lack of shielding contributes to the performance degradation.

? If I purchased a clone I would ask for a refund, and would only do a failure analysis out of curiosity if the seller refunded my purchase and told me to just keep the clone.

- Herb

On Wed, Dec 23, 2020 at 10:10 AM, Brian Donaldson wrote:

... Can you take a photo of the back of the unit. This will also help others IDing clones. I think Eric said that clones do not have S/N on the back of the unit. Would be interesting to see what the back of your unit looks like..

Yes,
? If these clones are originating from a single source then:
? 1. The back of the unit will not have a white sticker with a serial number.
? 2. "Tiny Spertrum Analyzer" on the back will have "Spectrum" miss-spelled.

I hate to say this, but you may have a bad clone. I have ran the self test on my two SA's after updating the firmware and they both passed all tests.
The other thing could be a bad solder connection on the board.
Just a thought.
Clyde KC7BJE?

I hate to say this, but you may have a bad clone. I have ran the self test on my two SA's after updating the firmware and they both passed all tests.
The other thing could be a bad solder connection on the board.
Just a thought.
Clyde KC7BJE?

What exactly is it that is failing, as all clones seem to have the same screenshot which should be a bandpass but looks like a flat response with a kink in it.

Are the 400mhz saw filters missing?

Can they be inserted, as presumably the circuit board will have been copied from original, so presumably there would be space to insert them.

Steve L

I know that Eric has already ID this as a clone. Can you take a photo of the back of the unit. This will also help others IDing clones. I think Eric said that clones do not have S/N on the back of the unit. Would be interesting to see what the back of your unit looks like..

Thanks,
Brian D
KF6BL

One more here

I am amazed to see how good this is working for the price. The PC software is also working great.

Thank you Erik!

This is normal
The stairs come from the stepwise increase of internal amplifications of the auto AGC algorithm
If you want to measure very weak signals below 1MHz I suggest to set the AGC to on? (not automatic) and the LNA also on (not automatic)
See this video with very detailed explanation:?

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Hi2all.

My TinySA Fail at first on Test 7.

I also look at the BFS in the Expert Menue.

Is it an Hardwaredefekt?
Does anyone have any advice on why?

Michael.

Just received one TinySA from R&L and testing the unit, updated firmware and calibrated.
I have a question - I see an increased noise floor at 1Mhz and below on the LOW input, it does look the same unconnected or with a 50ohm termination.
Does it look similar on most units or is something specific to this one? Is normal to have spike around zero that will decrease rapidly but I try to understand the specifics for Tiny SA and could not find an example. Just power on the unit and set center freq to 1Meg. Also if someone does know the explanation for the stairs like visible structure.
Thank you for a great little SA.

I have the same Errors.

Sorry, i thing you have a clone just like me.

The tinySA app is not ready for high mode
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So I have been experimenting with the TinySA, got it for christmas, yes I know not suppose to open till 25th, wife let me.?? So using it on the low input with the app software it works just fine, I have been testing it with our country transmitters and validating the calibration tools.? But trying to get it to go to the high side input and activated it on the SA app it does nothing except lock up.? What is the cause or is it just not ready for this abuse yet?? thanks.