I have been closely watching my D-error and RSSI numbers and would like some input to what I am seeing. I've been using a 6 element 800mhz yagi for the past week or so for my sds200. The antenna is quite an improvement over the small vertical I was using. I live in a simulcast area and even with the SDS200 I get the occasional garbled audio. Playing with filters seemed to help quite a bit. The system I monitor has 4 sites. 2 of those sites I set filter "OFF" and experience pretty much clear audio. The other 2 sites seem to work with filter set to "AUTO" on one and "NORMAL" on other and one has the ATT on. I see that my D-error is usually "0" but at same time the RSSI varies between 50 and 95. What is the relationship between these 2 numbers? The highest I have seen my RSSI is about 117. I didnt bother to use the "NOISE" option because the numbers were erratically changing too fast to be of any use. As I watch scanner go thru the system the RSSI numbers are between 50, 60 up to between 92 and 110.
So I see that making adjustments to these settings does help in the long run even tho it does take time. I really want to experiment with aiming that yagi in different directions and record my results. But where I have it mounted is too inconvenient to do this. I may order another yagi, the same one since it's affordable and mount it on a simple mast that I can easily make adjustments. The 4 sites I monitor on my state system are located with one site to my south, one to my east and the other two to my north, So its just a matter of nulling to get best results on all 4 sites......but with these sites being in all different directions, it may be a waste of time. Not all departments broadcast on all of those 4 sites all at the same time. I read that by pointing antenna at one of the sites, which in my case would be the south site which has very strong signal, it would null out the others and any offending simulcasts. I have been wrestling with this for months and I think my location is part of the problem. But when you have 4 sites with a bunch of antennas and towers for each one scattered all over it is very hard to troubleshoot.
So I see that making adjustments to these settings does help in the long run even tho it does take time. I really want to experiment with aiming that yagi in different directions and record my results. But where I have it mounted is too inconvenient to do this. I may order another yagi, the same one since it's affordable and mount it on a simple mast that I can easily make adjustments. The 4 sites I monitor on my state system are located with one site to my south, one to my east and the other two to my north, So its just a matter of nulling to get best results on all 4 sites......but with these sites being in all different directions, it may be a waste of time. Not all departments broadcast on all of those 4 sites all at the same time. I read that by pointing antenna at one of the sites, which in my case would be the south site which has very strong signal, it would null out the others and any offending simulcasts. I have been wrestling with this for months and I think my location is part of the problem. But when you have 4 sites with a bunch of antennas and towers for each one scattered all over it is very hard to troubleshoot.