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I think we have all experienced SD card problems over the years.

Sometimes I find reformatting or recovery tools work, but it's still a bit
hit and miss if they work.

However I have been discovering that the best way to sort out a corrupt
SD CARD is actually your cell phone ;-)

I'm no expert but I'm convinced that the reformatters in my Android phones
appear to be able to write to certain hidden memory areas or reset hidden
flags somehow.

I guess there might be some collusion between phone makers and sd card
manufacturers for this stuff, since the industry relies heavily on the two
working together, and that if there were too many failures then it would
soon get a bad reputation / bad for business. Well that's my theory.

When all my other utils fail, I end up shoving the bad sd cards in my phone
and reformat them in the phone.

So far it's been quite revealing how much more reliable this method has been.

YMMV.

73 de Andy

I'd try a different card.

Unfortunately, uSD cards tend to be pretty fragile and can easily become corrupted.

There are various SD card recovery tools (normally used for digital photos), if you want to try and save some of your previous captures.

Reformatting may make the card usable again, but you will lose the existing data.

Regards,

Martin

Hi. Help please.

I’ve had my genuine Tiny CT Ultra for a couple of weeks now. All going extremely well until today.
I have been saving/loading settings and captures to the supplied SD card from the start with no problems.

Today I wanted to copy a capture shot to my pc. So put the SD into my PC and it was recognised normally (I am used to inserting micro SD cards regularly so I know the card reader is good). Yet if look onto the card in W10 there’s no files visible except a uupd.bin 32,768 KB dated 10/12/2012

It was apparently working fine and there was a few captures etc saved and visible on the card until before I pulled it out of the TInySA. (Yes I did shut down the TInySA BEFORE pulling the card)
Now when I put it back into the Tiny SA the SD symbol lower left goes green as is normal but if I try to load or save it comes up with No Card.?

If I view the card properties in W10 it shows File system FAT. Free space 1.86GB
I tried saving a small file to the SD on my PC. It appeared to save ok, but when I reinserted the SD into PC the file was gone.

So it looks like the few files I had on the card are lost unfortunately. What should I do now? Format the card? Try another SD card? If so what format file system should I use to prepare the new SD card. Is there a card format command on the Tiny SA Ultra?

Any advice welcome please. I don’t want to experiment blindly and risk making things any worse. TINY SA Ultra appears to be working normally, but now refuses to see the card.

Thanks and regards Peter.

Hi,
-35,3 dBm on R&S FSL
-35,4 dBm on Advantest R3131A

Mirek

Tried adding multiple votes, but it doesn't seem possible.

All analysers are out of calibration, but there is a trend towards being slightly low of -35.0 dBm

-35.17 dBm on an HP 8563E
-35.30 dBm on a Signal Hound SA44B
-35.57 dBm on a Rigol DSA815

Regards,

Martin

-35.60 dBm on Siglent SSA-3021X.? -35.0 dBm on HP8592A.

Hi
-35.66??? on a SignalHound

I submitted my vote but just because it is so pretty here is what the screen of my HP 3585B looks like.

73

-Jim
NU0C

On Tue, 26 Dec 2023 09:50:10 -0800
"Erik Kaashoek" <erik@...> wrote:

A new poll has been created:

There is a need for better statistics on the CAL output level
Could those tinySA Ultra users with access to a high quality spectrum analyzer measure the output level of the 30MHz CAL signal?
This will help me to get some insight in the variation
Please make sure your battery indicator is green or the device is connected to USB

1. Below 34.6 dBm
2. Between 34.6 and 34.7999 dBm
3. Between 34.8 and 34.9999 dBm
4. Between 35 and 35.1999 dBm
5. Between 35.2 and 35.3999 dBm
6. Above 35.4 dBm

Click Here To Vote ( /g/tinysa/vote?pollid=40833 )

Do not reply to this message to vote in the poll. You can vote in polls only through the group's website.

--

73

-Jim
NU0C

I looked at the calibration output on an oscilloscope and saw a square wave with a glitch every 13.8ms. See scope capture attached.
Gary
W9TD

Big thanks to all for your inputs on this. It makes total sense to use something that is calibrated and validated for our medical device testing.
I just developed a test system and did not design it for Tx power measurement so do not have room in my test rack for a 2U spectrum analyzer but I will use one of the other RF devices pointed in the replies to see if I can use it.?

It is such a great tool to understand and design the tests..loving it being able to control it using Labview too for my testing
Best!

On Tue, Dec 26, 2023 at 02:33 PM, Stuart Landau wrote:

In many applications, having a much higher resolution than the accuracy would otherwise dictate still may be a useful feature.

I remember an engineering class? that described 3 attributes of interest when using measuring equipment.

Resolution - what is the smallest increment that can be measured
Precision - To what increment can the measurement be repeated and still give the same result
Accuracy - How close is the measurement to the actual value.

So a device can have fine resolution but not make very repeatable or accurate measurements which is not great.?
But if it has fine resolution and good precision and/or accuracy it is much better.

Roger

Can you posts capture of the low input, full range, with the antenna connected?
--

I remember back to about 1987 when Mike Humphrey (Uncle Mike) developed a PC interface and software to consult small community power utility companies. At the time he said it cost him around $400K to make his software and hardware legit.? He said it was strictly in the cost of doing business and the costs get passed to the customers.? Think about that for a few minutes and look at what we have at our fingertips.....? everything but the cert.? ? ? Now, you can still pick up used but certified equipment, usually sold by the cal houses,? maybe for like $5-6k.? Short term - rent it!? ?Equipment rentals are usually in a separate part of the general ledger in moderate to large manufacturing companies and there may be inventory, tax and other financial incentives for doing this.?

Two days ago google pushed a security patch to my phone, Android 13.? ?It gives support for WIFI 7 which is said to implement in 2024 with up to 6GHz capability.? So as has already been said you cannot predict changes in technology 20 years ahead.? (No DeLorean here)

Andy

The spectrum analyzers I am familiar with may have a resolution of 0.1 dB but the accuracy of the measurement is much worse than this so the measurements won’t be useful to you.

There is a need for better statistics on the CAL output level
Could those tinySA Ultra users with access to a high quality spectrum analyzer measure the output level of the 30MHz CAL signal?
This will help me to get some insight in the variation
Please make sure your battery indicator is green or the device is connected to USB

I understand to the wish
--

On Tue, Dec 26, 2023 at 02:14 PM, Erik Kaashoek wrote:

pushing the jog button during a long scanraw

Erik,
Pressing or moving left/right cancels the running slow "scanraw", but it would be very useful if I could also do this by sending a serial command.
Martin

Martin,
Can you check if pushing the jog button during a long scanraw will abort the scanraw?
--

Hi,
Attached is an image of the scope capture.

Also, please see the image of the High side as input, and the low side shows no radio signal input...
Any ideas?