开云体育

Specifically: ATTACK, MINIMUM GRIDLINES, COR WFM and COR NFM
Thanks,
Gary
W9TD

On Wed, Dec 23, 2020 at 11:38 AM, hwalker wrote:

? 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.

? 3. "AVDIO STATIC DISCHARGE" on the back will have "AVOID" miss-spelled.

Yes
Yes
Yes

We know that having a spectrum analyzer is a very nice tool for the bench. I have often looked through eBay for a used HP or Agilent or Rohdes, or whatever for my use here at home. When the NanoVNA came out I was sceptical at first but then decided to bite the bullet. Now we have a TinySA which I find very useful. There are some functions that are not what I would expect on a SpecAm.

For many years as a Satellite Systems guy I used HP SpecAm (8563A) and it became my life blood in the field looking at transponder signals. So. is there a particular SpecAm that was used as the model for the TinySA?

The frequency is also very inaccurate. TXing 146.420Mhz on my VHF transceiver reads 146.417 on any RBW too

On Wed, Dec 23, 2020 at 12:26 PM, S Johnson wrote:

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.

I updated the web page
?
--

Watch the video
--

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
--

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:?

--