Portable Software Defined Radio

Portable SDR that you can carry about in your pocket! The future of radio perhaps.

[@derekhatfield8699]

Superb thank you a proper rag chew explanation. Derek In Dudley

[@johnsim3722]

Are they doing a step down in the frequency first before an ADC?

[@TJMoir]

I just did another video explaining most of this. But it can get quite complicated so I tried to make it as simple as possible to illustrate the basic concept behind I/Q demodulation. Nowadays you can sample at incredible rates but yes you need to down sample before the processor can handle it.

[@pbelb]

nice introduction, but, this video would be *waaaaay* more helpful if you share a link where more information can be looked at.

[@TJMoir]

I'm afraid it's a bit like buying a new kettle or washing machine, they don't provide much in the way of how it's made, only 1 sheet of paper. There is a spec of course and I have made a new video showing the theory of how you demodulate AM and FM on a micro ie software receiver. There is an open source universal software radio receiver however which you can look at. Also GNU Radio. en.wikipedia.org/wiki/Universal_Software_Radio_Peripheral#:~:text=The%20USRP%20family%20was%20designed,free%20and%20open%20source%20software.

[@pbelb]

Hey​@@TJMoir , Perhaps your comment is really for @johnsim3722? I really wasn't talking about how it's made, but rather, a web URL link so that people that might be interested in getting their own can know of some places where they can find them, and from there, can possibly find out more about them. This specific product (or the original on which it's based), for example. Not generic how SDR works. You provided a nice review, but, you have not shared a way for others to find out about the product themselves!

[@TJMoir]

@@pbelb sure thing www.banggood.com/4_3-inch-Software-Defined-Radio-SDR-Radio-Receiver-100K-149MHz-Digital-Demodulation-Short-Wave-FM-MW-SSB-CW-HAM-DSP-Receiver-p-1985013.html?gmcCountry=NZ&currency=NZD&cur_warehouse=CN&createTmp=1&PLA-NZ-ALL-BGfeedcom-2204011-massa&ad_id=592464367633&gclid=Cj0KCQjwsp6pBhCfARIsAD3GZuYrf9kS-4bQN4LN_YqX_c1ibxuE8OI16w1fHb-TBQRVXqbkWyhagI8aAj5SEALw_wcB

[@TJMoir]

@@pbelb Link is shown. I don't always like putting the price etc since it looks like I am selling it or promoting it which I am not. It's just more engineering interest. But the link is below for info. Cheers. There are a great many other types which are similar, some better than others. This one is a clone which means I can't connect to a PC as far as I know.