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This shows the measurement option to measure OIP3 and it is used to measure the internal IIP3 at 0dB attenuation.
Two tones (6MHz and 7MHz) from fairly clean signal generators are used.
Bot the left and right IIP3 are shown.
Investigations are ongoing to further improve this and an IIP3 level of +25dBm could be possible.

See the wiki for the details


Yes, ref level and attenuation are linked as you would expect so the noise floor comes up with increasing attenuation but signals stay on same level.
Both ref level and attenuation can be set to automatic


Next to store and subtract (normalize) there is also waterfall

The SA outputs its first LO from the high connector.
The tracking generator mixes the LO with a signal at the first IF and after an LPF you get the tracking signal

Herb,
Asynchronous mode
independent transmitter, independent receiver

73, Gyula

On Mon, Apr 27, 2020 at 11:48 AM, <erik@...> wrote:

I am building a Windows SA application

Linux support, too?? Please!

On Mon, Apr 27, 2020 at 10:45 AM, <erik@...> wrote:

Using two tinySA, one as spectrum analyzer in low input mode and the other as tracking generator ...

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Erik,
? How does the tracking feature work?? From the picture you provided, there is no usb-usb connection so it is not a stepped sweep with one spectrum analyzer acting as the host and the other as the controller.? So how does the generator frequency in the first spectrum analyzer stay in sync with the sweep of the second for tracking purposes?

- Herb

Erik,
? ?Looking at the photos you have shown, some of the menu options look like a winner.? Store trace, subtract stored trace, maxhold (M:H) and simultaneous display of stored trace and live trace are features usually found in big box instruments.? What other detectors beside peak will be offered?

? Does the reference level automatically adjust with change in attenuation?

- Herb

Hi Eric
I offer myself as tester and has the following gear:
R&S CMU200 SA(10MHz-2.7GHz) with signal generator (0.1MHz to 2.7GHz) version CRTU-RU

HP8559A SA 0.1MHz to 18GHz

Signal generator HP8664A 0.1MHz to 3GHz

2xHP141T SA covering 0.1MHz and 18GHz and 1,6GHz tracking generator

and then some more handy stuff :)
Kind regards
Kurt?


?

Like the nanoVNA the tinySA supports full control over USB
I am building a Windows SA application with unlimited measurement points that can use the tinySA as it's measurement front end.
The console commands are very similar to the nanoVNA

Erik,
? ?Is the usb port only for charging or will it also support remote operation from a software application?? If so do you have a list of the commands that will be supported?

-? Herb

Using two tinySA, one as spectrum analyzer in low input mode and the other as tracking generator with external modulation input
The tracking generator can be set to a small offset so it is possible to do some tests on mixers.
The metal can is a 110MHz BPF

Using a smaller sweep to cover the 40 meter band gives a bandscope



A lot of digital traffic.
I still need to optimize the gamma a bit

And for those that want to see what happens over time a waterfall display

Karsten,

Thanks for the feedback. Typo corrected and phase noise spec added.?
Phase noise is -90dBc/Hz at 100kHz offset and -115dBc/Hz at 1MHz offset. This is a consequence of the balance between cost and functionality.
In this post?/g/tinysa/message/5? you can see a picture of a full 350MHz scan showing all the harmonics (and additional spurs) of a 30MHz signal.
As the VBW is bigger then the RBW given the 290 display points the tinySA inserts additional steps and takes the maximum of these steps for the display points.?

Dear Erik,?

the device looks promising in the Wiki description. For most ham operators it should be a helpful device.

Only minus for me: as far as I see it, for useful oscillator characterization (PLL performance) it is not usable: -100dBc a few kHz from the carrier is not in the specification.
But for harmonics (-70dB should be kept to prove -60dB)? and spurious search it would suit, as far as I see it.
The question will be: Can you can scan the 1st harmonics of e.g. 50MHz and the next harmonics 100, 150, 200, 250 300 MHz with one sweep and what will be the detection limit? Or would the user have to scan the first harmonics, memorize the level, change the range, scan the 2nd .....

To the typo: in the technical Specs "Input frequency range from 240MHz to 9600MHz" has a "0" too much.

vy73 de Karsten, DD1KT

Full range low input scan of the build in calibration signal.



AD9851 output with delta markers on the harmonics

Some picture showing what the tinySA can do

Measuring the harmonics of a 30MHz signal



Showing the power envelop of a mobile phone base station.

First and foremost I wish you and Hugen health and success!

Looking forward to hear more about the miniSA.

Let us know how can we help and test it.

73 de Luís, CT2FZI