"SDS scanners use a receiver that are extremely dependent of the RF environment. UPMan once stated that sensitivity are better than 2uV but when measuring with a single signal from a RF signal generator it is actually 0,3uV as most other scanners. When connecting an antenna it can easily desense and it can also automatically reduce its gain if it senses a strong transmitter at its input, limited by its bandpass filters, that will have a 760-1300MHz range for the highest frequencies. So there's no real guaranteed sensitivity that can be given for a SDS scanner that will be true in all normal circumstances. And that goes for all RF related specifications for a SDS scanner."
Ubbe You are right,most of the development cost gets spent on the digital processing,decoding.Ok we need an Rx,let's throw in a cheap Rtl type SDR chip,let's add a bit of RF front end filtering,hey don't spend too much,we are on a budget here.This is not confined to Uniden so don't bash them too hard. On the bench brilliant, -118dbm for 12db Sinad.
On air,strong local signals stop it decoding.That's the real world.
In our RF crowded world,be prepared to pay very serious money for a receiver that can cut it. Upwards of $3000 maybe.Buy cheap buy twice.
Keith
