Well, that got out of hand quickly.?
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Just a remark on the subject of China-bashing: the Chinese are very well capable of producing top-quality products, if you ask them to. But consumers want things cheaper, not better. China just caters for this demand. If you want crappy non-compliant stuff they'll make it for you. 'You want a 10 dollar HT? Here it is. We could make it compliant but than it would cost you 12 dollar. It's up to you.' I own a China-made children's toy HT on PMR. It is on par with and often beats top-brand HT's. Still it was only �6,5 .
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Back to the topic:
From the images it is 99% clear to me that the receiver is the RTL-SDR dongle. I too love this little RX and it sparked a lot of interest in RF with many people.
But: it isn't the best receiver ever. It has no real front-end, it is a broad-band direct conversion sampler with a single mixer directly connected to your antenna. And worse: you have to connect it to a device that is full of unknown clock sources.?Below is a picture showing a local repeater about 1 km away. Only one signal is real ...?
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What I am trying to say is that you might see a lot of strange signals on your SDR, but chasing them with the SA might be like chasing ghosts.
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