Comments
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@G8JNJ Btw, i forgot to mention, thanks for all the info, Martin. I listen on your Kiwis and they are sounding really good. I agree that it must be very well aligned EQ with still about 6 dB in noise floor från antenna at higher frequencies. Its a v…
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Another way to see this is that the RF front-end AGC acts as a protection. If ADC is not clipping then fine, and that is always good to strive for, with rf eq, careful gain adjustments and so on as Martin stated, but as soon something climbs up too…
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Yes and in addition to the above; For Kiwi owners with large antennas, who are not so experienced in the "dynamic thinking" (which is probably a large percentage of Kiwi owners) it will make everything better and easier. But even for us mo…
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Ok thanks, Looks good. Nice effort you have put into with filtering and notches. And yes if you have 6 dB increase in noise at higher frequencies, the antenna must be quite good in effeciency att higher frequencies. I dont see that with long wire an…
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@G8JNJ "The key aspect is Signal to Noise Ratio (SNR). If you have >10dB noise floor above the receiver noise floor with the antenna connected, you are throwing away Dynamic Range." Yes. Please read again what i wrote :)
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/17188#Comment_17188 @G8JNJ It all depends of what antennas we are using. I know many fighting with extra attenuators, and loosing sensitivity on higher frequencies, and who have not the poss…
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/17183#Comment_17183 @jks Thanks for making this thread! Just a thought: I don't know how you can get access to the RF-ADC total input level, for the front-end AGC algorithm. Maybe something …
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/17185#Comment_17185 Yes an equilizer is often good to attenuate MF/LF. Especially with longer antennas in the km-range where for example I designed a simple LCR-filter giving -15dB below 1600…
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Front-end AGC. Hi. Good news with the 31 dB attenuator. Thank you! I don't know if this is already the plan: Let the software adjust the attenuator in 1 dB step, to maximise the sensitivity while maintaining no clipping in the ADC. This "front-…