I believe it was determined that "invert" was a LPF and "normal" was a HPF.One thing that I just noticed that a certain trunking Phase I and II system does not trunk in "Normal" Global Filter Mode. Only in "Invert" mode mode. What the heck is INVERT mode. Strange. Never had this issue with the BCD996P2 radio
But then if you leave Global Filtering in "Normal" mode then scanning is fast. If you leave Global Filtering in "Auto" mode than the scanner scans real slow. NOT GOOD
Interesting I talked to them about adjacent channel interference before the filters became available so I am sure they have had questions. The filters have cured 95% of my adjacent channel interference and intemod on uhf/vhf.Talked to Uniden customer suppot about front end overload and rf settings. As of now they have had no questions concerning the front end overload and offer no solution
It's very difficult to do, or more likely impossible. The chip that are used as a receiver are not designed to scan frequencies with a high scan rate. It is supposed to search frequencies of television or sat frequencies and then store them and be used when somebody change channels on his tv or sat box. It becomes extremly slow if it also has to switch frequency band while scanning. The chip costs less than $10 so lets hope that the future Uniden SDS500 uses two chips, one scans and when it monitors traffic the other chip continues the scan and stops on next conversation, ready to take over the monitoring when the first chip stops monitoring. Standard dual VFO would also be possible. That would be the expected technology evolvement after this experimental test with SDS100/200.Now I would love to see an update that gives us something I remember from the old days, it's called... Turboscan. Make the thing scan so fast that it's just a blur. Man that would really improve performance.
Can anyone give a filter list with descriptions or purpose, thank you.I'm not a HAM and I have no idea what any of the filters do. (I'm also not messing with them) It would have been nice if Uniden had added a page or two listing the filters and describing the purpose and function of the various filters.