Herb,

That's a good observation on VID/PID, I will have a look at how to handle it.? I have a nanoVNA-F2 from Sysjoint so can do tests with that and my TinySA-Ultra.
Although I have tried the tinySA-App in the distant past, it only runs on Windows so I don't use it.? Are there any 'desirable' features it has that QtTinySA is missing?

I am not planning to add 'firmware update' because it seems people have difficulty using it in TinySA-App, and the DFU-util method works well and reliably in Linux and presumably in Windows too.

My next target is to make zero-span work correctly, or at least better, in QtTinySA.? I have a feeling that I tried it before and the 'sweeptime' command doesn't work when 'scanraw' is being used but I need to test that again now that I have a better understanding of how things work.

Ian

Dave's Hobby Shop (w5swl.com) aften has a good mix of surplus SMA attenuators. Dave is a good guy and I've always been satisfied. I've also found good deals on new and gently used Mini-Circuits attenuators on eBay when Dave doesn't have what I need.

73

-Jim
NU0C

On Wed, 12 Jun 2024 14:47:48 -0700
"Dom via groups.io" <domesi2005@...> wrote:

Where can I get the attenuators for the TinySa?

Hello all,

Is there a way to have the setting of External Gain be persistent?

Since I only have one attenuator and I have it connected always, it is a little frustrating to having to keep setting it after reboot
or when I select Measure Harmonics after setting the Ext Gain instead of the other way around.

Please let me know, thanks!

Barry

开云体育

AliExpress carry a big range of attenuators. for a cheap and cheerful 'safty' attenuator there is a board with 30, 20 and 10dB and a 0dB on the same PCB for about $5. Search AliExpress for ...

diymore DC -4.0Ghz RF Fixed Attenuator Module Board

Where can I get the attenuators for the TinySa?

Aha,

I (for the second time) reseated the display cable and ... voila, everything is okay again...

Thanks all for your support and suggestions!

-Frank

I just tried this from the FAQ:

Question
The tinySA Ultra is does not react to touch commands or the jog button Answer
The LCD cable may not be seated correctly. Open the case and carefully lift the black clip holding the LCD cable at both edges till it swings up. Reseat the cable and press the black clip down till it clicks in position.

Does not help either... I have now completely disconnected the display and connect the TinySA Ultra to my serial port.
Same issue as before, I can run 'version':

ch> version
tinySA4_v1.4-169-ged1dfed
HW Version:V0.4.5.1.1

But most other commands just 'hang':
ch> vbat
... no response anymore until I restart the TinySA Ultra

-Frank

The display cable connector has a black plastic clip that has to be very carefully lifted at both sides.
This will cause it to rotate up and release the display cable allowing reseating.
--

Hi Roger,

I tried your suggestions by keeping the jog wheel (that's what it is called :-)) to the left and power cycled. The settings are not (visibly) reset and the device remains unresponsive to the touch screen or jog wheel.
The only change I notice when keeping the jog wheel in the 'left' position at power on, is that my center frequency starts counting down to 0 in a few seconds as long as I keep the jog wheel in the left position.

Again, if I press the jog wheel within 0.5 seconds after a power on, the menu appears, but then (again) I cannot change anything anymore.

Needless to say I'm a bit sad about this...

-Frank

Hello Herb,

I bought the TinySA Ultra at the Zeenko Store on AliExpress... About half a year ago...

Unfortunately none of your suggestions help, but thanks for your suggestions.

One thing I didn't try yet is to reseat the display connector. I'm not sure if this is a 'pull out' connector or 'rotate 90 degree' connector to release the ribbon cable...

I guess I need to understand what defect could cause my behaviour... For this I need schematics to troubleshoot...

Frank

On Wed, Jun 12, 2024 at 06:21 AM, kent irving wrote:

is this normal, and how many other signals are being produced by the device itself?

All digital (and some analogue) devices emit RF noise, the level depends on how well it was designed.

The emissions from the TinySA Ultra are at a very low level and should not be of any concern.

You will see the emissions when using the telescopic antenna supplied with the SA, but this is really only intended to allow folks to get started quickly, and to be able to see some signals. It is useful for interference hunting in the home, but for more accurate and noise free performance, an externally connected antenna is preferable.

Regards,

Martin

Yes, this is normal. Any electronics device will emit some radiation.?
Try other devices. You will be suprised by the emissions from a phone, computer, keyboard, mouse, monitor, etc...
Even the radio you are using to listen to the tinySA will radiate.
--

SA Ultra shows signal at 192.100MHz. Tuned that on a radio and heard steady beeps that seem to come from the SA. when I move the radio away, they are inaudible and when I move the marker with the jog wheel they match my movements. And if I hold the jog wheel, the beeps stop while the screen is frozen.?

is this normal, and how many other signals are being produced by the device itself?

Good day to all! Blind grandfather is in touch with you again.
Please tell me the pins of the display cable so that I can connect a larger screen.
Thank you!

Is there any pinout for monitor? How is it connected in general?

TNX!!!

Try this...
/g/tinysa/message/16336

Roger

Thanks to everyone for their replies. I finally was able to find the Zip file and installed it without a problem. I big thanks to Ian for all the work that has gone into this program!

Let me check. This could be a bug
--

Thank you, Erik, for the document.
It describes nicely the calibration procedure, which I also applied before.

I see, that on page 19 it is stated that for DIRECT and DIRECT LNA can't be
changed by the user for whatever reason (although it works for the last 18/17 frequencies).?

But surprisingly also for IN HARM and IN HARM LNA the last 8 (IN HARM) / 9 (IN HARM LNA)
correction values (index 12..19 and 4..19 for IN HARM and IN HARM LNA, respectively) cannot
be changed via the GUI on the device. They can be changed only via USB commands.

Is this the expected behavior?

Best regards,
Michael