As we have been having some 700mhz issues stemming from high noise in the Phoenix area(lengthy discussion here https://forums.radioreference.com/u...ers/371579-sds100-initial-review-phoenix.html), I was doing some testing this morning. I noticed something very interesting. The SDS100 performs much better when it is first powered on after being powered off overnight. As time goes on, performance issues with noise get worse. Even though I am in Phoenix, none of my tests have been in extreme temperature conditions (i.e. not outside when it is 116 degrees). My testing has always been done in my air conditioned home or car.
This might be one of our issues with performance in Phoenix as we do run a little hotter here.
Notice the pictures. These were taken when testing with an external antenna:
9:04am when first powered on. -45dBm signal, lower noise level 643, receiving the data channel frequency 771.76875.
9:19am no signal, high noise level 33009, not receiving or decoding the data channel frequency 771.76875.
9:45am after being powered off an sitting in the refrigerator for about 10 minutes. -45dBm, lower noise level 421, receiving the data channel frequency 771.76875.
This might be one of our issues with performance in Phoenix as we do run a little hotter here.
Notice the pictures. These were taken when testing with an external antenna:
9:04am when first powered on. -45dBm signal, lower noise level 643, receiving the data channel frequency 771.76875.
9:19am no signal, high noise level 33009, not receiving or decoding the data channel frequency 771.76875.
9:45am after being powered off an sitting in the refrigerator for about 10 minutes. -45dBm, lower noise level 421, receiving the data channel frequency 771.76875.
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