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Gary, Do you have experience with an auto attenuator setting? I could imagine doing a full range sweep with widest resolution bandwidth and set the attenuator to keep the strongest signal below say

Erik, I am just looking to make a usable 1-100MHz9or so) SA for my HF homebrew and boatanchor mod projects. I don't care to go up to GHz at all.. Now that you have a programmable attenuator, how about

Now the TinySA is fully functional I could not help thinking about next steps. Dynamic range (IIP3, noise level), RBW filters are ok. Going to harmonic mode above 868MHz is no fun and using below

THANK YOU Erik, it just keeps getting better and better! I was going to ask you about the PE4302 boards.. you beat me to it. I am still waiting for parts... 73, Gary WB6OGD

THANK YOU Erik, it just keeps getting better and better! I was going to ask you about the PE4302 boards.. you beat me to it. I am still waiting for parts... 73, Gary WB6OGD

For some measurements an input attenuator is essential. Adding a step attenuator is pure convenience as manually adding input attenuation works also. I went for a ready made module found on eBay that

And here are the measurements. First 128MHz from a SI5351 through a -30dB attenuator The fractional spurs around 128MHz are visible but the signals at 27.66MHz and 155.66MHz should not be there. Lets

Using the excellent filter calculation tool that can be found here: https://rf-tools.com/lc-filter/ I calculated a 9th order Chebyshev low pass filter As you can see the tool can be told to use

I checked the datasheet. For the amplification of the LO signal 12dB should be ok. Just reduce the adf4351 output a bit. For the amplifier after the first mixer you have to add loss from first mixer

The one I got is claimed to be 20dB but at 2GHz is only 9dB Look carefully at the datasheet -- HBTE Files section: /g/HBTE/files Erik, PD0EK

What did you use for the 9/10dB amplifiers? I have not found any LNAs with such a low gain on eBay. It is easy to find LNAs with >20dB, e.g. SPF5189z, but none with just 10dB. One could build those

SA.exe always have been a 32 bit executable so you only need the 32 bit runtime. So I had to remove the reference to 64bit runtime. No need for me to change the build -- HBTE Files section:

Hi Erik, I am a bit puzzled by that "doing a 32 bit build", (but it could be just my ignorance of anything 64 bit). I am using Windoze XP+SP3 and your software runs without any problem, at least in

Indeed, I am doing a 32 bit build, will update the instructions accordingly. -- HBTE Files section: /g/HBTE/files Erik, PD0EK

SUCCESS. Thanks Erik, I have managed to get your SA to come up on my HP Windows10 laptop. Final problem was to install the Microsoft Visual C++ 2010 SP1 Redistributable Package (x86, even though I am

I updated the build and usage instructions for the TinySA There is some extra info added on how to use the SA.exe control program. -- HBTE Files section: /g/HBTE/files Erik, PD0EK

Hi Erik, I still get a warning from Norton who erases the file. I have to repair the quarantine. The good news is that the SA.EXE starts up now. I get a few error messages but I have to play a little

Thank you Erik, I will report 73 de ON7UF Roland Verzonden: dinsdag 10 december 2019 9:53 Aan: [email protected] Onderwerp: Re: [HBTE] How good, or bad, is the tinySA? I uploaded a new SA.zip file

I uploaded a new SA.zip file containing additional error checking and reporting. Can you try? -- HBTE Files section: /g/HBTE/files Erik, PD0EK

Thank you for the reply Niels. I had already ordered filter elements from Australia when I saw it, but it was fascinating to follow the link that you provided. There often some fantastic prices for