Thankyou.

I have played with my HP141 boat anchors using the highest frequency plug-in in the past and adjusted the centre freqency knob to see if signals go up or down in the display (to determine if it is a genuine signal or spurious spike due to harmonics etc). This is easier to do with a knob on the old gear rather than changing frequency via the menu (sorry if I am telling readers how to suck eggs).

i am sure your possible robust design specifically for the high frequencies (dropping 0-300mhz) would make a complementary unit to the current one . It would mean a ?pair of devices between them covering 0-3gkz) with satisfactory performance for around ?100 ($120) - a bargain. Although there are various handheld devices around now ( I have an old Deepace KC901s at ?1300), they are much more expensive, bigger, and/or do not have as good a performance ( eg rbw of 2.8khz).

I understand the worries concerning ?possible complaints of unexpected performance, but most buying this kit will have some appropriate insight and knowledge and should understand about limitations of the kit. I am sure I am not the only one to use a spectrum analyser to measure leakage from the microwave but most users have far more sophisticated tasks for these devices. I would have thought that the nanovna would be far more challenging than a spectrum analyser to use for those without a professional background but they seem to sell like wildfire ( as does the present Tinysa).

As explained in previous posts the current tinySA design with some small HW and SW modifications can go up to 3GHz (using harmonic modes) with a HUGE disclaimer.
It can be VERY difficult to interpret the measurements and we expect MANY customers complaining so it is NOT a feasible product.
I have studied how to do a more robust design up to 2GHz or 4GHz and if you are willing to drop the bottom 300MHz (0-300MHz) it is feasible for an acceptable cost.
But for now not on the priority list.

Dear Eric,

i am new to this forum, but have ordered TinySA.?

I own a shack full of HP 141 and other boat anchors, which have hardly ever been used. I am very interested in what you have done to get a TinySA board working up to 3ghz.

i am sure there would be a market for a 300mhz-3ghz Analyser so that this and the TinySA would cover the whole range from zero to 3ghz. I could then get rid of all those boat anchors. I am having to downsize sixty years (!) of collected radio equipment and electronics stuff as I am never going to use/repair most of it. (I also have a large quantity of vintage computer stuff I want to actually get working prior to possible donation to a computer museum).

Stephen Laurence, G7PSZ

See the

Congratulations on a successful initial run, Erik.
I know it is early days, but are you considering a 4" version?
/ Gerry

The tinySA has (too?) many settings to optimize the scanning for a specific measurement purpose.
I added a wiki page that shows what impact some of these have on scan time and noise level.

It seems to be that I am one of the lucky ones who does get one from the first stock :)

On Tue, Jul 28, 2020 at 10:34 PM, Erik Kaashoek wrote:

Plenty of stock again on Aliexpress!!!!

Sorry for being wrong. The new Aliexpress quantity is pre-sale of the second batch. That is why the lead time is so long

开云体育

Erik,

thank you for clarifying and thank you for another little hightec tool :)

Chris

---
'Everything should be made as simple as possible, but not simpler' -- Albert Einstein

On Tue, Jul 28, 2020 at 12:51 PM, hwalker wrote:

? Is the Aliexpress store an official hugen second source??

The Aliexpress store is an official hugen second source also managed by Maggie

Plenty of stock again on Aliexpress!!!!

Hi,

I bought the one after yours and they say delivery in October. - shrug -

I have survived 73 years without it so a few more days won't matter very much.

73,

Bill KU8H

bark less - wag more

On Tue, Jul 28, 2020 at 01:26 PM, hwalker wrote:

?A third option is to put one tinySA in max hold and step a second tinySA/rf generator 290 points using the same step-size as the first tinySA.? I get a pretty clean trace that way, but haven't figured out how to normalize a max-hold trace.

? I swept a filter using the proposed third option and realized that a limitation is that harmonics of the tinySA output are 40dB down.? That's actually pretty good for a $50.00 device, but in MAX-HOLD it also means you can't see more than 40dB down because the harmonics lead the sweep.

? The alternative is not to do MAX-HOLD and instead read the peak carrier level at each 290 point generator step, and plot the accumulated data in an external program.? That should get you 70dB or more of dynamic range.??

- Herb

On Tue, Jul 28, 2020 at 12:58 PM, Erik Kaashoek wrote:

Currently impossible for high range.
Without an extra mixer, so only two tinySA the offset is max about 700kHz
If you add in an extra mixer any offset is possible

Erik,
? I think the topic deserves its own Wiki entry with specific details for the two tinySA with offset set-up, and using two tinySA's (or one tinySA & external 433.8MHz source) with external mixer and attenuator/preamp for isolation.

? A third option is to put one tinySA in max hold and step a second tinySA/rf generator 290 points using the same step-size as the first tinySA.? I get a pretty clean trace that way, but haven't figured out how to normalize a max-hold trace.

? Most modern specans offer a tracking generator option, so the topic will address those user's looking for a similar feature on the tinySA.? With the availability of the nanoVNA for s21 measurements, the tracking option is not a must have feature for me - unless it can do >70dB down from 100kHz - 350MHz.

- Herb

On Tue, Jul 28, 2020 at 03:17 PM, Erik Kaashoek wrote:

See first post on this subject

The two links made me understand how it works.

https://tinysa.org/wiki/pmwiki.php?n=Main.MODULATION

On Tue, Jul 28, 2020 at 11:18 AM, Erik Kaashoek wrote:

Current batch is mostly sold. Next production batch is ordered but it may take some weeks before it will be available

? ?One bit of information that I found surprising is that list of buyers at the Alibaba store are almost all European or North American customers.? I always thought the bulk of sells on the Alibaba were to the Asian market.

? ?Did hugen announce? the first run to his Asian customers?? Hopefully, positive reviews will start flowing in by the time the second production run is offered for sell.? Get some rest, you deserve it.

- Herb

Currently impossible for high range.
Without an extra mixer, so only two tinySA the offset is max about 700kHz
If you add in an extra mixer any offset is possible

开云体育

On Tue, Jul 28, 2020 at 11:18 AM, Erik Kaashoek wrote:

Current batch is mostly sold. Next production batch is ordered but it may take some weeks before it will be available

? Congrats, Erik.? I never had a doubt that at its price point and list of features that the tinySA would find a large audience.? Many members of my ham club brought two so that they could dedicate one as a RF generator.

? I didn't notice you added a second store at?? until one of the other members mentioned it.? I always purchase from hugen's Alibaba store so that is the only source I have been recommending.? Is the Aliexpress store an official hugen second source?? In any event, that source is sold out and hugen's Alibaba store had less than 20 units the last time I looked.

? Again, congrats on a fine first production run to you and hugen.? Continued good fortune in the future.

? BTW, don't rest on your laurels like the V2 did and let the competition get a leg up on you with slicker packaging and better marketing.

- Herb

So far as I can see, the given examples show a tracking generator operating over the low range. Is it also possible to sweep the high range?

Additionally, how much offset does the current approach permit?