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Also note that if I apply a digital low pass filter to the signal (this is available within the oscilloscope) using a cutoff frequency of 50 MHz I then obtain a value of -36.16 dBm (versus the -35.21 dBm value I obtained without the use of the digital low pass filter).

Just FYI,
Don wd8dsb

I connected the TinySA Ultra to my Rigol digital oscilloscope input via a 6 inch piece of RG-316. ?Tee connector on scope input with 50 ohm load. ?Scope displaying Vrms. ?Using the oscilloscope waveforms voltage measurement in RMS I then converted this to power using the 50 ohm load value and then calculated dBm, and I obtained a value of -35.21 dBm.

I did not submit this in the poll but think it’s a pretty valid measurement technique.

Just FYI,
Don wd8dsb?

On Wed, Dec 20, 2023 at 02:32 PM, Erik Kaashoek wrote:

You can create a python application on a PC connected to the tinySA using the supplied tinysa.py library that does that

On Wed, Dec 20, 2023 at 02:41 PM, hwalker wrote:

You will need to write a customized application to accomplish what you want to do.

Is there something already done and tested, perhaps something unofficial, made by an ordinary user of TinySA Ultra ?

On Thu, Dec 28, 2023 at 04:31 AM, Andy G0FTD wrote:

Trying to sort out the wheat from the chaff here with the many posts and
bits of info scattered about.

I have updated the firmware on my Tiny SA Ultra.
Done the self tests and calibrations, all passed.

Now do I have to do a CLEAR CONFIG after this ?

What exactly is it clearing ?

? ? CLEAR CONFIG is a hard reset.? It will clear any calibrations you have performed and require you to re-do them. It is advisable to perform a CLEAR CONFIG immediately after you perform a firmware update to wipe out any extraneous trash remaining from the previous firmware update.? A level calibration must be performed after a CLEAR CONFIG or loaded from a configuration file.? It is also advisable to perform a CLEAR CONFIG if you have accidently messed up your configuration settings and are experiencing strange symptoms.

Herb

Hi,
This image is produced while I am broadcasting at 169 MHz near the TinySa (40cm).
The second image shows the same broadcaster (TI launchpad Kit) broadcasting and at 429MHz with an antenna on the high side.
It feels that something is wrong with the low side ...

What next?
Amir

Trying to sort out the wheat from the chaff here with the many posts and
bits of info scattered about.

I have updated the firmware on my Tiny SA Ultra.
Done the self tests and calibrations, all passed.

Now do I have to do a CLEAR CONFIG after this ?

What exactly is it clearing ?

73 de Andy

Update:? I had said earlier that I found that updating the driver via Windows Update fixed my problem.? Unfortunately that was only 1/2 the fix.??
After updating the driver, and therefore fixing the "Driver not found" and warning icon issue, I then had an error "Cannot open DFU device 0483:df11"
The fix to this is to replace the installed driver with one that allows DFU updates.? I followed the instruction and installed the WinUSB driver



Follow this link??
It worked like a charm and I was able to update my firmware.

Thank you for the awesome information.? For me. all that was required was to install the device driver as per your instructions using Windows Update and displaying the Optional Updates.? ?There is was.

I set the internal -30dBm cal to 0 and 2dB/div and get -34.4
I did not submit a vote
The old girl had not been turned on since I got the tiny's

I own two Ultra units.? Both measured the same level of -36.0 dBm on a Siglent scope in FFT spectrum analyzer mode.?

Measured -34.8dBm on an old HP-8553B after calibration using the 30MHz CAL output from the HP-8552B IF section.

On Wed, Dec 27, 2023 at 11:14 AM, Hans Boon wrote:

Erik,
I like the way in which the SD card is accessible on the Lite_VNA64.
No need for touching the card in the device.

Hope you may be able to implement the function.

? ?DiSlord re-wrote the original operating system used by the liteVNA64 over a period of months. The revised operating system allows a PC to see the liteVNA64 SD card as an external drive. You might notice that he did not do the same for the NanoVNA-H4, which shares an operating system similar to the Ultra.? The Ultra certainly has enough memory to accommodate the required change in operating systems, but the required time and effort is daunting and would require a long period of beta testing to ensure it didn't introduce bugs that break legacy operation.? Erik's current high level of support for the tinySA, Ultra, and any current development on future products most likely does not leave time for an operating system re-write.

Herb

Erik,
I like the way in which the SD card is accessible on the Lite_VNA64.
No need for touching the card in the device.

Hope you may be able to implement the function.

Regards,

Hans, pa2hbn

Herb, that is wishful thinking! Ya know that in practice you usually find issues, some can be fixed and some others just can't... For example: "stupid"....

I recorded -36.2 dBm on my Anritsu MS2720T. TinySA Ultra was just charged and green LED was showing.

On Wed, Dec 27, 2023 at 09:59 AM, Prawlin wrote:

But TBH that post might as well have been written in Klingon speak for me. I have no idea about such stuff.
For me it would have to be plug and play, click and drag etc.?

Python is a great language to learn for both hobby and business use.? I didn't learn Python until I purchased my first tinySA and now I can at least run any provided script without too much trouble.? At 69 years of age, if I can pick up the basics then I suspect anyone can.

Herb

On Wed, Dec 27, 2023 at 09:48 AM, Stuart Landau wrote:

?

I just measured the calibrator at 30 MHz on my mini ultra using my Mini-Circuits Pwr sens 4GHS USB power meter. Using averaging, it reads -33.32 dBm.

?

This is a very accurate meter. I did not use a cable between the Ultra and the sensor, just one microwave-type N to SMA adapter. I will cross-check against an HP sensor later in the day.?

?

?

Stuart,
? In order to perform level calibration at much higher frequencies, the 30MHz calibration output is rich in harmonics and therefore a power meter will not provide an accurate reading for 30MHz ( the power sensor will integrate 30MHz and all other harmonics ).? You could try using a 30MHz LPF between the calibrator output and the Ultra input and you should get a reading closer to -35dBm.

Herb

Thanks Herb. But TBH that post might as well have been written in Klingon speak for me. I have no idea about such stuff.
For me it would have to be plug and play, click and drag etc. ?Cheers. Peter.?