ORIGINAL: c/f
SK,
The SS as I know it, the Transmitter links up using independant freq for each receiver upon initial power up and then jumps freq across entire 2.4 GHZ range in tandem with the receivers, thus with the skipping rate and dual redundency many systems can use the entire bandwidth at one time. I've been to indoor events in which as many as 30 users were using that above radio system.
You describe Frequency Hopping Spread Spectrum which is used by Xtreme, Nomadio, Hitec, (Futaba?). The Spektrum system uses a GUID to spread the signal over the allocated channel which is Direct Sequence Spread Spectrum, a completly different animal.