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Hi Erik, That is a really nice idea, thank you very much for the suggestion. I have ordered a few parts and look forward to having something to play with a in few weeks. Would you be able to provide a

Very good effort and finally a nice working instrument, thanks and Congrats please. Sarma vu3zmv

Some more real measurements. Now with calibrated dBm scale First to determine the IIP3 I'm using two clean sinus generators through two attenuators combined into the input to measure the IIP3 One is

Building and tuning GHz cavities is not everyone's hobby but if you need a zero till a couple of hundred MHz spectrum analyzer there is a much simpler build possible. This is all you need to measure

This one on eBay https://www.ebay.co.uk/itm/0Hz-1800MHz-1-8G-LPF-low-pass-filter-insert-lost-0-5DB/183131566628?hash=item2aa37df224:g:VdwAAOSw2PtarKA5 See picture of graph for roll off

I was very lucky to find some cheap on ebay. But here you can find how to build yourself http://lea.hamradio.si/~s53mv/spectana/sa.html

Hello Erik, I am following your postings for some time now, as I am also building a spectrum analyzer. I am struggling with the design of an input lowpass. Could you perhaps publish the design of your

Satish SW (both PC and Arduino) https://github.com/erikkaashoek/Tapr-VNA HW description incl schematic of the mixers /g/HBTE/files/SimpleVNA Will do an update as the current

Hello Erik Can you place the complete project of your home brewed Ghz VNA analyzer here on the group That is circuit diagram, and the required boards and also the software or link for it. Many of us

Neat trick with the field sensor. And as always thanks for sharing your interesting experiments. /Marcus

To complete the building I measured the S21 of the cavity filter First the pass band As the home build GHZ VNA does not have any shielding the dynamic range is rather limited but the -3dB

During my 2 GHz SA experiments it became more obvious that having three IF's (2.5GHz, 110MHz and 10.7MHz) was leading to all kind of problems so I went looking for a very narrow band cavity filter. To

1.Objective :just a simple knock out test to have an antenna system for the best bang of the buck. 2.For qrp and qth use.To use same type of antenna for both installation. 3.To include comparison of

Thank you all guys!I am convinced the Xr function gen is not the answer to my need.Your suggestions saved my time and resources.Gary's Si5351 suggestion is great.Cheap modules are available and

You should do something like everyone else. I would use an Si5351, not DDS but hi tech PLL.? Mounted on a board they are now down to < $4 on ebay. They are xtal locked, sub Hz resolution, <8KHz-?

Never used the XR2206 but me experience with discrete component function generators in the 1960's indicates the cycle to cycle jitter would be too poor for a VFO. Besides jitter, the XR2206 has a 20

You should reference the chip's datasheet for estimated current draw. It's out on the 'net. Given the ship's age, its current draw is likely higher than a complete Raspberry Pi or similar micro.

Hello every one. May I know if anyone has the experience of using the XR2206 modules available at ebay? Its rated up to 1mhz sine wave.I am thinking of the idea of mixing its output with a 3mhz xtal

For some time I have been fine tuning my spectrum analyzer. Did some improvements like replacing the cavity filter with a much narrower version so the 10.7MHz second IF no longer creates spurs. And I

Could be as the actual performance of the SA using two of these modules is better than what I measure with the audio method