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I was thinking the cheap Chinese chips might be counterfeits also and not meeting specifications of the actual AD chips.? Based on eBay policy... I think these can be refunded and not have to be

There are some ADF5801 modules on ebay that look interresting. I bought one. The performance is, after replacing the output pull up inductors not very bad with an IF between 200MHz and 400MHz but

I bought some chinese modules from ebay. Most had wrong components or bad layout and did not deliver the promised performance Normally? they copy some sw, copy the hw reference design with some cost

Not sure who you are asking. My sw is also on windows using .net.

I'd be interested in the RPi software you are using. Much of what others have done seems to be Windows based. Or are you using Wine? Thanks, Dave L.

Hi,? There has been some discussion regarding the March edition of the RF and Microwave Source by AD that notes the ADF4371 which looks really impressive though the chip is about as much as the

Returns not accepted. I wouldn't bother. 73 va3abn wrote:

Hi, maybe not exactly home brewed test equipment but it might be useful anyway... Anyone tested this type of RF signal generator?

The log detector of the SI is good but the ability to see a small signal close to a big signal is to be investigated. According to the data sheet at least. I ordered one to test.

Thank you for the interdigital filter link. On the same site you can also find a very interesting 199MHz Spectrum Analyzer design (As an alternative to Specan). Especially the use of a SI4432.as IF

Reminds me of this design of Cavity Filter that almost looks like a combination of the Interdigital Filter and Pipe Cap Filter (coupling difference only looks like):

For the rest of the box, a couple mm here or there does not matter as much. It is only the resonator length that is critical. If the box sizes are far out, you may end up with a filter that has a

In my opinion, pipe cap filters are best suited above 3GHz. I have used them up to 24GHz without problems, but their size compared to bandwith and loss makes them little suitable below approx 3GHz.

Hi all, ? what about pipe cap filters? Too much loss? See?http://www.w1ghz.org/filter/Pipe-cap_Filters_Revisited.pdf for some details. ? @erik: My mental?arithmetic?was not working yesterday

So you found the perfect mixer and want to test it, should you try to find a PCB or do a quick prototype? Using a small bare PCB, three short wires, three SMA edge connectors and some paper is

Thomas, That is indeed the calculation I used. The height of the interdigital filter is calculated a 1/4 labda. How critical is this? Its not easy to make a very accurate box. If only the rod length

I would suggest skipping the cavity, and building a interdigital filter: https://www.changpuak.ch/electronics/interdigital_bandpass_filter_designer.php Altough the link shows it as some nice, milled

2 of the 3 sim-83+ mixers on sma board i bought from a reputable vendor where bad at arrival. Not sure want to buy these again.? I would go for ADE-42MH as first mixer an ADE-25MH as second and

Never thought of... do I feel like a newbie.? Looks like there are cost effective Jewelers Loupe glasses and the optivisor or headband magnifiers.?? ? I see?rfextra (

I? found 2.4GHz SAW filters at mouser. Bought some and tried to put one on a pcb. That failed, but will try again eBay has 1.090GHz filters with SMA connectors that shoul work. 1GHz is much easier