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Below is the reason that I took interest in the tinysa. I had hoped to see and demonstrate how modulation works in the HF and VHF bands. The old SA that I have now can barely do that. Even if the

Hmmm, now that I think about it a bit more, the tinysa and an SDR could make a very nice complementary pair. Paul WB1EMK

I concur: I have an RSP1A. I've used the "RSP Spectrum Analyzer" software (technically an FFT analyzer) with it on occasion ... it goes to 2GHz which is better than my ancient HP 8590A (nicknamed ole

I have one Airspy HF+ for HF and some VHF, one Softrock Ensemble for HF,? one Airspy R0 for V-UHF and a dozen or so RTL-SDR digital TV dongles repurposed for V-UHF receivers (very cheap, about

Hi Luis Sure. I Got two off them ? I have not experaince with it apart form the who wrote about the combo. I will of course fire it up. I will however mainly compare to my R&S CMU200/CRTU-RU

Kurt, How about that? I own a RSP1, compatible with https://www.sdrplay.com/spectrum-analyser/ . This will be great to compare to our soon-to-be-loved-tinySA :D *73 de Luís, CT2FZI* *QRV @

Hi Leif If you are ready to invest a bit then look at <https://www.sdrplay.com/> https://www.sdrplay.com/ and purchase one of these models. Then you have a first call SDR Radio and secondly by

All true. I would check FM, DSB and what ever there is. Modulation would be easier understand with a suitable SA.

Use any web sdr. Most have a waterfall option.

Can you recommend one/a few which can do that? I have not found a SDR which could do that. Leif

Using a sharp tunable BPF after the LC LPF at the output of the generator I was able to measure the still present second order harmonics at -73dBc so third measurement ( at -24dB fundamental) is

Or use a SDR receiver as a poor man SA. You can see modulation sidebands and splatter very well in the waterfall display. You can use really small BWs. Regards, Ignacio EB4APL -- El software de

To measure close in products you need a much narrower RBW typical is 30-100hz, maybe 300hz.? You also need to insure the carrier if any is not overloading the input of the SA. If true SSB source and

Your expectation on harmonics are dependent on the cause. For example input overload can do that, often you get other products like 3/2s as you have two signals generally the source and then the

It slowly occurred to me that I am doing this still too complicated and there is an even simpler measurement approach. (if this is too much details for this group feel free to shut me up) Using only

RBW means Resolution Bandwidth,e.g. the bandwidth of the narrowest filter before the power detector This implies you can not see anything inside a good SSB transmission but you are able to see if

Thanks Allison for the advice. As preparation for detailed performance measurements of a tinySA special using an high IIP3 mixer I?added two LC filters after the generators to remove the harmonics

AS the minimum RBW is 2.7kHz you can not "See" you modulation For that you best use a receiver and a PC with line in.

How close to a carrier I can get? Many Hams, educators and me would like to see and check their modulators. That is, can I see what does spectrum of? SSB with 1kHz modulation look like. Or 300Hz and

Perfect, thanks.