You guys can ignore this but your welcome to reply. I found the archives for this list and was able to locate a couple subjects that are giving me some information.
But, feel free to reply, but also feel free to ignore it because I believe I am asking the same question you guys have likely answers about 40 times, lol. On Thu, Oct 12, 2017 at 7:34 PM, Kevin McGuire <kmcg3...@gmail.com> wrote: > Guys, > > I got to doing some calculations and I realized that exceeding -15dBm on > the receiver circuitry could be a lot easy than it seems to amateurs like > me. So, I wanted to run this by some of you because I know that you guys > have far more radio engineering knowledge than me. > > So, lets take a situation for me. Lets say there is a 100-watt transmitter > within proximity of me. And, I never thought much about it but obviously > that could be a problem. When I use the link budget calculation I enter in > 50dBm for the transmitter power, set zero for transmitter loses, set zero > for receiver loses, set 5db for both TX and RX antennas. Then for the > distance I have to put in about 3200 feet in order to only see a link > budget of -15dBm. > > I know that is only for perfect world conditions and then its even more > complicated in reality but I figure that should give me a fairly good idea. > It is actually scary because I used to tinker with my B200 less than 500 > feet from an antenna that was 50-foot up around 154mhz. > > Now, I am not sure what part of the RX chain is sensitive. It could be > after filtering which means that -15dBm is only for a signal that gets > through but I suppose also to be on the safe side I might need to consider > anything. Anyway, it just took me by surprise when I realized how much and > how easily I could exceed -15dBm. I know too it depends on time so that 1ns > of -5dBm might not burn something up but you know in my case this 100-watt > FM transmitter would transmit for a few seconds at a time. > > What are your thoughts, suggestions, or ideas? >
_______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
