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Re: TinySA Ultra Calibration Fail.

 

Hello Jorge,?
?
LNA U14: BGA2817.?
e.g. Mouser part# 771-BGA2817115?

73, Thomas
(all parts from another posting:
- Input RF switch U22: XA17-G4K? ? or AS179-92LF ?(mouser 873-AS179-92LF)
- LNA U14: BGA2817 ? ? ? (mouser? ? 771-BGA2817115)
- Attenuator U38: PE4312C-Z ? ? ?(mouser 81-PE4312C-Z)? )


Re: TinySA Ultra Calibration Fail.

 

https://tinysa.org/wiki/pmwiki.php?n=TinySA4.FaultFinding


Re: TinySA Ultra Calibration Fail.

 

Hello again,

Just for update about the thread, I've disassembled the TinySA and remove the U22, the RF Switch, and replace it by 0R jumper joinning traces.
The result is that the power values from CAL connector in 30MHz Output mode goes to normal values and "Safe Test" near pass succesfully. However when it needs LNA to measure it fails, which is normal, becouse know as I don't have RF switch it can measure anything in that trace.

I tried to calibrate it is not possible to finished it becouse also needs the LNA, but now the power values has more sense.

Probably I've to replace to the LNA, which I think is U14,and it will get back to the normally, but I need to know the PN to buy them.
?
Could you tell me what are them?
?
Thanks in advance.
?
Greetings,
Jorge.


Re: Tiny SA as a power meter.

 

2 volts peak to peak is +10 dBm if you have a scope.?


Manual fault finding

 

I've added a page to the wiki describing some steps for manual fault finding.
Could some of the users that have (had) problems with their HW have a look at this page and check if it helps them locating the probable faulty component(s)
?
--
Designer of the tinySA
For more info go to


Re: Problem with calibration and self test ZS-407

 

Thanks for the quick response!
?
?


TinySA Ultra Calibration Fail.

 

Dear all,

I've been playing with my TinySA, and I think I've passed the measure power limit during some test and now my device doesn't measure correctly. Probably I exceeded the +6 dBm.

I've uploaded new FW and try to pass the self test, and I've obtained errors on tests: 3,4,7, 10,11 and 14. I attached a picture,
?

Try to passed level calibration is not possible.

I've appreciated that if I inject a signal from a signal generator of value is attenuated but measurable, however if I turn on the LNA I can't see anything, so my first thoughts is going about the LNA is broken.
I've also tested the attenuator and it works well.

So I join this group with the hope that you could help me to solve the issue.

I also attach a picture of the back with the S/N.
?

Thanks in advance for the support and I'll be waiting for your news.

Greetings,
?
Jorge


Re: Problem with calibration and self test ZS-407

 

This is a broken LNA
Suggest to contact your supplier
--
Designer of the tinySA
For more info go to


Re: Problem with calibration and self test ZS-407

 


Re: Problem with calibration and self test ZS-407

 

Tested with different coax cable but same result..?


Problem with calibration and self test ZS-407

 

Got problem with self test and calibration.. any ideas?
?
?


Re: Pre-sale, tinySA ULTRA plus

 

everything should be fine with you, the older younger version is determined by the bootloader, it seems to me that there are almost no changes in the difference between the versions, the difference is not significant at all, it seems like a different display and something else, I haven't seen the insides of the older version yet, but soon someone will post a review and it will be clear. this opinion about the differences may be wrong.


вт, 25 февр. 2025 г., 22:57 KK1L Ron via <kk1l=comcast.net@groups.io>:

Hi Richard,
?
I just purchased the 406 from R&L arrived today. Mine has the same marking. My confusion is that the upper right under Zeenko is ZS-405, but S/N is SU-406-xxxx H/WV0.4.6. So did "they" forget to update the upper right?
?
73 de KK1L Ron <><


Re: Pre-sale, tinySA ULTRA plus

 

Hi Richard,
?
I just purchased the 406 from R&L arrived today. Mine has the same marking. My confusion is that the upper right under Zeenko is ZS-405, but S/N is SU-406-xxxx H/WV0.4.6. So did "they" forget to update the upper right?
?
73 de KK1L Ron <><


Re: Self-test error and does not continue

 

I checked the cables and adapters, they are ok.
I couldn't check the RF signal via oscilloscope, probably because the signal is too low.
But the 30 MHz signal is coming out, I tested it with an amateur radio receiver, on all frequencies, and with the same signal intensity for all.


Tiny SA as a power meter.

 

I've been trying to align some HT's this week.
?
After a lot of messing about I concluded that some of the commonly available
"ham"style meters were somewhat variable in quality.
?
So I decided to try using the Tiny SA as? a power meter with suitable attenuation
and calculations.
?
I *think* that so far this has ended up being more accurate but I'd still like
to hear of other folks experiences using this method.
?
As an aside, the sig gen function has been invaluble for setting up squelch
levels and determining sensitivity too.
?
I learnt quite a bit by using the sig gen function to set up my Quansheng
squelches, there's three squelch service menus, get them wrong and
you get a disaster on your hands. (Maybe a topic for another forum!)
?
Whilst doing various tests I was surprised to see that my old Wouxun UVD1
dual bander HT was 6db less sensitive than my Quansheng's.
?
Thank heavens for having a Tiny SA to hand - thanks Erik !
?
And Murphy's always strikes when using various cheap cables / sma connectors.
?
Oh man, those cheapo SMA's can out of tolerance causing odd losses and
not mating properly, grrr !
?
73 de Andy


Re: hardware defect

 

Sorry it is -35 dBm for ultra and -26 for smaller version.
?


Re: hardware defect

 

Well on mine the 30MHz fundamental is consistently at -35dBm. No problems with tests and all attenuator steps as well as the LNA do function as expected. TinySA Ultra (SeeSii) Version: tinySA4_v1.4-156-g4eb315d, still original.

Q: Does this indicate a problem, or was there a SW update that changed it to -26 dBm, Erik?
?
Thanks
Lutz


Re: hardware defect

 

On Mon, Feb 24, 2025 at 10:08 AM, R. Maris wrote:
Through the dedicated tinySA support page I was forwarded to the tinySA groups.
I don't know what "support page" you were on before but this is the only place where the developer Erik supports the tinySA products.? Read this post about failing self-tests before asking more questions.
?
A couple of points:
  • This group only supports genuine tinySA products.? Post a picture of the front and back of your device in order to determine if you have a counterfeit or genuine product.
  • The selftest requires that one of the supplied cables be connected between the two ports.
  • If you have a scope measure the output level of the 30 MHz. cal output with a 50 ohm load. ? It should be close to -26 dBm
Roger


Custom band markers

 

Hello,
?
I am not sure if I am confused :) but something is telling me that that I did read it somewhere, but I can't find it in the tinySA Ulta menus. Is there a, or was there an option to upload a specific named file defining various bands like NanoVNASaver has and toggle all on/off (versus one by one) and have it draw on the screen? Here is an example

?
If not, could this be considered in the future update?
73,


hardware defect

 

Through the dedicated tinySA support page I was forwarded to the tinySA groups.
I'm not sure whether hardware issues can be reported along this way.

I'm owning a tinyAS ultra, S/N SU-23080463.
Since some time I had doubt regarding the output level of the signal generator (appeared too low, significantly). But since that didn't doubt me, I didn't care about it - till now.

Yet I found that the LNA has got defective. With LNA, signal is negligible.

Self tests: 3, 4, 7, 10 - all Signal level Critical.

What to do?