How do people keep getting clones?
#tinysa
Hello Erik,
Thank you for developing the tinySA.
You keep telling people where to buy an original. ?How the hell do some keep getting clones. ?Are the recommended dealers somehow receiving clones and then selling them as originals? ?You must be tired of answering questions about clones.
Thus, if the recommended dealers aren't selling clones, why do people keep asking for help when they must have NOT FOLLOWED YOUR ADVICE AS TO FROM WHOM TO BUY.
I love my 2 originals I bought from R&L. ?With all the questions about fake tinySAes, I worry that somehow I got a clone from R&L. ?Simply, if recommended dealers are selling originals, WHY ARE PEOPLE BUYING CLONES?
Thank you for your efforts! ? ? ? ? ?larry
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Can you try if the new release solves the problems? --
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For more info on the tinySA go to https://tinysa.org/wiki/
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New FW release: Set actual input level error corrected
New FW release Version V1.3317 Changes: - Bug solved: Setting the actual input level gives wrong leveloffset - Bug solved: Green line remains after selftest
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For more info on the tinySA go to https://tinysa.org/wiki/
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Re: TinySA battery no longer charging
Try a different charger. I had some of the cheaper chargers stop working after a few month the cheap capacitors used wear out because they are marginal to start with. I actually build a small linear supply with a USB output for the TinySA. It solves the problem of switching noise radiated via the USB cable and gives me a reliable output voltage.?
I use a voltage /? data splitter to feed it when I use it with the computer. The splitter? can be bought at many places and is used for external hard drives, tablets and so on.
John
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Re: What to do when a selftest don't fails
Erik. This is the result for my tinySA (first release). Is this the expected graphic for an original equipment??
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Re: What to do when a selftest don't fails
Thanks, this confirms its a clone You will have, even after careful calibration at the target frequency, up to 5dB measurement error
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For more info on the tinySA go to https://tinysa.org/wiki/
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Re: What to do when a selftest don't fails
Attaching the picture as suggested by you:
On Mon, 23 Aug 2021, 11:36 Erik Kaashoek, < erik@...> wrote: Its an illegal clone, for sure.
The passing of the self test does not ensure if you will have accurate harmonics measurements when the tinySA has been made with wrong components as shown at the end of this video:?
Can you submit a picture of the screen after you did the following commands:
CONFIG/EXPERT CONFIG/MORE/BPF
and click on the screen to hide the menu.
You should see a wide peak centered around 10MHz
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For more info on the tinySA go to
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Re: What to do when a selftest don't fails
Thanks Erik for your quick response. Now my doubts are cleared. I will do the same as recommended by you.
Due to not so friendly relationships with India and China recently, getting the original tinySA from China has become complicated and not so economical. As confirmed by Maggie looks like you don't have any? recommended seller in India as of now. Maybe you can think of the same in coming days.
Regards? Anthony
On Mon, 23 Aug 2021, 11:36 Erik Kaashoek, < erik@...> wrote: Its an illegal clone, for sure.
The passing of the self test does not ensure if you will have accurate harmonics measurements when the tinySA has been made with wrong components as shown at the end of this video:?
Can you submit a picture of the screen after you did the following commands:
CONFIG/EXPERT CONFIG/MORE/BPF
and click on the screen to hide the menu.
You should see a wide peak centered around 10MHz
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For more info on the tinySA go to
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Re: What to do when a selftest don't fails
Its an illegal clone, for sure. The passing of the self test does not ensure if you will have accurate harmonics measurements when the tinySA has been made with wrong components as shown at the end of this video:?https://www.youtube.com/watch?v=I5IzLAGgKg0 Can you submit a picture of the screen after you did the following commands: CONFIG/EXPERT CONFIG/MORE/BPF and click on the screen to hide the menu. You should see a wide peak centered around 10MHz
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For more info on the tinySA go to https://tinysa.org/wiki/
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Re: TinySA battery no longer charging
Try using a new USB-C cable, see if that helps. I've had loads of problems with the USB C cables wearing out quite quickly.
The cable may not be the cause of your particular problem but it certainly has been for me.
Barring that, I'd remove the board from it's case and make sure there is 5V coming from the USB cable with it plugged in, it should be around the PCB's USB-C socket somewhere.
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Re: What to do when a selftest don't fails
Hi Erik, First let me thank you for creating this lovely equipment, looking at the size and functionality of this test equipment few years back it would had been science fiction :-) Coming back to subject line, yes I brought tinySA online where the online store assured they are selling original only and not clone. However, after receiving the product I feel it is a clone as the serial number start with "AD". The interesting part is that it came with valid software version and the noise level and attenuation looked good. To check I have upgraded the version to the latest version from your website and surprisingly it passed all the 12 tests, even the attenuation level test recommended? by you looks good. Now I am confused, should I be asking for refund for this device ? Attaching the pictures of the same:     
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TinySA battery no longer charging
I have a genuine TinySA purchased from the Zeenko store on AliExpress.
it worked fine when i go it, battery charged up OK, over 4 volts.
Now it will only charge to 3.27v and the red charging LED goes out before the battery is actually fully charged.
The display show the battery icon as almost empty.
If I plug in the USB cable again, the red charging light goes on, but will not stay on for very long.
Does anybody have any ideas on how to troubleshoot this problem?
Thanks for your suggestions.
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I also noticed this error, even the error is in the adjustment of the LOW input and the HIGH input, but if you inform the calibration level exactly circa times, it will accept the correction in the fifth time.
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Thanks, maybe something went wrong with the latest FW update. Let me check. --
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For more info on the tinySA go to https://tinysa.org/wiki/
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Hi Erik, The high input calibration is done with a nanovna as hf generator at 250 MHz (CW)
the output signal measured with the calibrated low input of the tinySA, that worked well and
the self test too.
Then put the vna signal on the high input. (Uncalibrated I had about 2 dBm margin of error)
After calibrating via the config menu (actual input level),the value turned out to be incorrect.
Every thing was done as your instruction video shows
At the end i loaded the previous fw version (1.3-265) and both inputs could be calibrated well.
Wim
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Wim, How did you perform the high input, or did you calibrate the hi output? --
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For more info on the tinySA go to https://tinysa.org/wiki/
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Hi Erik, installed the latest firmware update yesterday. when re calibrating the "hi-input" it turned out that this did not yield the desired result instead of e.g. -34.2 dBm I came to about -10 dBm actual power. The June fw version gave no problems and worked correctly, even after restoring the previous fw version everything worked well again.
It's not a big problem because uncalibrated gives the high input a fairly correct value. Despite that, I think it's worth noting.
73, the Wim PA0WFG
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I've had a long think about the data and I am convinced the sidelobes are a function of the time domain measurement window. A Wiener inverse is not needed to fix that.
Mathematically, for N Hz RBW you need 1/N seconds of data. A boxcar window of that length produces sinc sidelobes in the frequency domain. Instead of a boxcar of length n, use a triangular weighted window of length 2*n. That will be sinc**2 in the frequency domain which has very low sidelobes. If you scale the data properly you can do the weight multiplication by bit shift so the filter is a shift-add operation. You can, of course, use any weighting function for the time gate and get the Fourier transform of that as the spectral spreading function of the acquisition system. For a Gaussian response, apply Gaussian weights from a table. It can also be done in a completely analog manner with an FET and a function generator.
That part I'm sure of. The matter of smaller RBW using the existing HW is rather harder. I'll address that later after I've done some more analysis.
Have Fun!
Reg
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Re: Comparing antenna outputs
Mike,
You probably need a LNA if you are comparing relatively weak TV signals. It would be a good idea to use a 75 ohm input LNA, then the mismatch at the output to the 50 ohm tinysa would be negligible. You also need to use the pilot signal (if you can isolate it) to compare as the rest of the signal bandwidth varies with time.
www.arrl.org/files/file/Technology/TV_Channels/8_Bit_VSB.pdf
Gary
W9TD
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Re: Comparing antenna outputs
Yes it is.? I have used my unit to accurately aim TV antennas, and to compare response of different antennas. ?
I did find that if I tried to look at more than 2 channels of data it was hard to get readings.
Dennis?
On Fri, Aug 20, 2021 at 10:44 Mikek < amdx@...> wrote: Hi all,
?I have ordered, but not received my TinySA yet. (R&L)
? I want to compare two TV antennas. Is the TinySA sensitive enough to show the signals that a TV will receive.
The frequency range I'm interested in is 200MHz to 610MHz, Can I scan that whole band or do I need to do it in chunks?
I understand over 350MHz specs degrade, but if I'm comparing two antennasI expect they will both be degraded the same.
I'm guessing I will just have to live with the 75¦¸ to 50¦¸ mismatch. I don't think that is much.
Any hints?
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John Cunliffe W7ZQ
Igor - PY3IG
Wander Lucio
Gary W9TD