开云体育

Oops - I was just looking at the assembly to see if I could shrink it without too much work (I can), but I noticed an interference between the attenuators and the feature in the upper case that is supposed to hold them in place when it is closed.? See image.?

I will fix this and upload new versions of the upper case shortly.? Mine was printed with this error, and it still closed, so the actual amount of interference is probably less than what is shown, but it still should be fixed.

I will also be sharing some images of a narrower version later...

Stay tuned.

The TinySA example starts with connect the high output to the scope then it says to set
"CAL OUTPUT at 30MHz and set it to HIGH INPUT mode". I would think that should have been HIGH OUTPUT since we are outputting a lower band signal!? Are all the calibration signals? output from the HIGH connector? I find this particular example very confusing and need some clarification as to how to do this process.
wt1v/syd

The obvious solution is to just buy a bigger 3D printer!??

If I get some time, I will try to see if I can create an alternate version that reduces the current 150mm width, but it may require sacrificing some storage slots and made that area on the left side smaller (where the cables and attenuators live currently).

I happened to find a little stylus last night that I rembered being included with a resistive touch screen I bought for tinkering a few years ago (I tried to find it before, but couldn't locate it), and tossed it into my 3D printed case with the USB cable.? I agree - it would be nice to have a little sleeve area to slide this into on the tinySA itself.? I actually found it in a 3D printed case I did a while back for a fan controller with a touch screen interface for my 3d printer enclosure.? I had modeled that with a protrusion on the side with a hole to store the stylus.? :-)

With regard to your comment about the audio jack, someone has already done this.? Check the files section of this tinySA groups.io - I happened to see it there last week when I was poking around here.

Thanks Herb for the reply. You've confirmed my suspicion that the letters stand for certain parameter settings, but I was hoping to know specifically what each letter signifies, and the difference between lower & upper case.

Thanks...

Ya know, since you started this one... I wonder if there could be a replacement case for the actual device in the works? I say this because the new functionality of having audio output so one can listen to a signal might be a good reason to print a modified rear case that's a little thicker to accommodate an 1/8" audio jack.? You might be able to keep the current top half of the case and just come up with a replacement bottom half that's deeper.? Just a thought.

And since we are dreaming, I had a cell phone case one time that had a small hole in the edge you could slip a small 2-3" stylus into. That to me would be far preferable to the guitar pick option.

Thanks,
Sean

Very nice! Looks like there is room for a DC-block as well.
Too bad my 3D-printer is only 14x14 cm, and it doesn't work to print a scaled down version either... :-)

On Fri, Jul 30, 2021 at 01:58 AM, mikemm58 wrote:

Sorry if this has already been a topic, but I'm wondering what the meanings of the letters on left side of screen denote.? This would be the string of letters just under LOW (or HIGH) . For example mine shows "afrgnb".? I imagine these are to show some sort of status or parameter selection.
Any help appreciated!?

? ?Erik replied to an identical question in message?/g/tinysa/message/5294 .? Through observation you can determine the letters indicate whether different settings are manual or automatic or enabled or disabled.? In manual mode certain letters change to upper case,

? ?The letters help Erik to troubleshoot user issues by being able to see which significant settings have been changed.

Herb

Sorry if this has already been a topic, but I'm wondering what the meanings of the letters on left side of screen denote.? This would be the string of letters just under LOW (or HIGH) . For example mine shows "afrgnb".? I imagine these are to show some sort of status or parameter selection.
Any help appreciated!?

Thanks

The filters are not Gauss shaped. This signifcantly would improve settling and sweep time.

You're welcome - I enjoy working on these sorts of projects.? I hope it works out for you.

I've printed the top, now printing the bottom. Looks good so far, thank you for all of your effort on this.

As it happened I spent a large part of the day looking at the RBW filter responses using a couple of tinySAs. I don't see an issue. The 300 kHz and 600 kHz filters are the only ones that have issues. The rest are textbook perfect. Might be beneficial to evaluate the other possible RBW values. Then again, the picture I got from the tinySA is SA mode might not be accurate.

Electronic filters have a nomenclature and taxonomy and are a rather recent invention ca 1930's. I'm accustomed to using them as well as some other taxonomies.

Based on my tests today, I don't think significant improvement can be made except as part of a broader push for greater accuracy and dynamic range.

I continue to be staggered by the performance of the tinySA in all modes.

Have Fun!
Reg

AN415 mentions IF filter bandwidth in a couple places (around page 34). The SI4332 data sheet has some info on page 64 table 12. (See register 0X1C)

There also exists a spreadsheet on the website that calculates register parameters.

-Ray WB6TPU

Hi Toni
if you try at 950 MHz and various frequencies output is correct.Of course I calibrated before the 10 MHz, with a ribidium standard and 12 digits counter.
This is really a bug at 960 MHz. With other firmware is good.
Sandro

Sandro, you can correct the ref.frequency oscilator (for his internal calculations) of tinySA by MENU setting:

CONFIG - EXPERT CONFIG - MORE - MORE -CORRECT FREQUENCY? and enter, in your case 9.998307M.

(9.998307 is referred to 10M as 959.8375 is referred to 960M)

See this video?

enjoy!

I looked all through the datasheet and AN416 but could not find the filter details. I looked at everything on SiLabs.com that looked relevant.

Reg

There is a very limited set of parameters that "tune" the filters.?
Parameters are:

• Optional decimate by 3
• Decimate by 1,2,4,8
• Select one of 15 precalculated filters

I'm using the recommended combinations to get 57 BW filters.

Thanks.
--

Hi Erik
Setting 960 MHz high output real is 959,8375.
At self test end below " touch screen to continue" there are a little funny lines.
Apart from these, last FW do a great job.
Thank you.
Sandro