The SCU enables listening to multiple bands at the same time on the same antenna. A hardware platform with multiple SCUs such as the FLEX-6600M allows for monitoring multiple bands on different antennas or the ability to perform more complex noise mitigation techniques that are available in multi-antenna systems.
Has Anyone tried to do this and if Yes, How???
First, the information, Diversity Reception, on this is on page 86 of the 2.3.9 manual. Older Manuals around page 73.. This only works with the 6600M Dual Receiver units. I had Antenna A on my large Carolina Windom antenna, my arsenal of receive only antennas are connected to RXA input..
You need to use Stereo Headphones, and turn off the front speaker on the "M" version! I found that you can increase the RF gain a lot when in this mode trying to dig out weak signals. Also the AGC-T can be adjusted as well for optimum reception.. The results were Amazing!! Being able to turn on and off DIV reception allows you to hear the station in a normal fashion or with Dual Antennas and DIV reception..
I dug around the band for some very weak signals on 20 meters tonight, and the ability to do this was the difference from a station NOT being heard, and Being Heard with reasonable good clarity!!! I could switch the RXA side to several long wire antennas, LOOPS, V's, and when you select the correct antenna, well the magic of the Flex goes to work!!!
If you have multiple antennas and have not tried this, you should!!!!
All the more reason to buy a flex that has two spectral capture units. And as we all know the current solar cycle conditions makes pulling out the weak ones more challenging.