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If you go on Amazon there are a hundred books about this MCU. If no one on this site can suggest a good one then look through the books and find one that is rated high and the contents sound like what you are looking for. I imagine a good book will contain suggestions about compilers.
OK final results
I did the following:
- added several ferrite tubes on both sides of the amp
- added one ferrite tube at each antenna
Got room for a minor bump of a couple db on the gain.
- Removed the ground wire that was attached to the 4 foot by 3 foot mesh behind the yagi
Got room for 3-...
If you are set on learning assembly language there are probably some books that can help you understand the general principles that you would see no matter what processor you are using. I don't know your level of programming experience but assembly language is so basic that you will need some...
Thanks for thinking it through. The DB Pro is designed specifically to work with a dual band antenna FYI. However I have the 1900 MHZ gained turned down since this seems to allow more gain before feedback on the 800MHZ.
I did see an improvement with my shielding but not enough. So next will...
Question - do you see any benefit to mounting the two antennas "back to back"? The maximum horizontal distance I could manage is only about 30 feet with maybe 6 feet of vertical separation. Thoughts?
OK I have installed a 4 foot x 3 foot grounded mesh behind the yagi antenna. It works perfectly on the 1900 MHZ band as now I can push the gain on the amplifier to almost the maximum. However, as you predicted, it has less improvement in the 800 MHZ band. Since I don't care about the 1900 MHZ...
It depends upon how much expertise you want/need in micro controllers. If you are just programming general micro controllers to do certain jobs I wouldn't bother with assembly language. (I have programmed extensively in assembly language before C was as good as it is now) Assembly language is...
I am assuming you are even interested in VLSI. If you are then do what was mentioned and find out the current state of understanding and issues. Pick something simple that is also valuable. If you make your project too complicated you will be sorry later.
If there is some area that you have...
The transmission of electrical power is simple in some regards and incredibly complex in others. The primary concern is getting electricity from point A to point B. After that come the percentage of loss. That is why Edison's DC power distribution failed. DC isn't good for distance. The...
To clarify a few points, the sytem I am using is a "micro cell" as mentioned.
There is still feedback when I try to get sufficient gain from the internal part of the system. That is why I am thinking to block the rf from the back of the yagi. The amplifier has an automatic feedback...
Thanks for the assistance. I will go ahead with isolating the back of the yagi from the signals that may hit it from the inside directional antenna.
The amplifier I have is bi-directional. But we are still having the feedback due to not having the yagi isolated enough. So I will report once...
If you are serious about doing this and have funds to have them made I can offer some initial advice and maybe help down the line.
When trying to communicate to an engineer or fabricator you need to spell it out with specifications. This can take the form of an outline in a document.
Summary...
I have a cell signal amplifier with a dual band yagi on the front end and a panel antenna inside the building. The problem is that I cannot get enough boost from the amp for the inside antenna due to oscillation or feedback back out to the yagi. As it is I had to detune the yagi to get any...
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