ORIGINAL: beau0090_99
No,
It is one highway (the 2.4 spectrum), with multiple lanes. Where is this information coming from? This is completely backward from what I have read up to this point.
No... I think you misunderstood what was said.
It is TWO highways with multiple lanes in each.... for DSM2, etc.
Web site you cited talks about the multiple lanes ( frequencies ) with respect to one center frequency that is designated the "channel".
Later DSS implementations also incorporate a second backup channel ( like another different highway ) that also works to back up the first.
That is why the "channel" analogy is poor. DSS is a BROADBAND transmission accross multiple effective frequencies as displayed in the graphs.
ORIGINAL: beau0090_99
If you look at a spectrum analysis of the 2.4 ghz band with a DSS system, you will see that it picks two channels or lanes at power up of the Tx, and will not move from those two lanes as long as you leave the Tx up.
Tt will not move from those "highways"... the lanes are still available centered around the channel frequency.
ORIGINAL: beau0090_99
The last link I posted showed that at some times the Spektrum/JR Tx will pick two channels that are directly adjacent to each other in the spectrum. Thus, if the high powered 2.4 Tx that is dumb (doesn't look out for other things on the band) it can blanket these two adjacent bands and cause a lock out. Bruce showed this on his site. It is not like it will now move over to another lane or channel.
"Bands" is correct, however "BAND" refers to a RANGE of frequencies.
ORIGINAL: beau0090_99
It's not like we have 2 dimensions to play in here, we don't even have two spectrums. Once a pair of channels or frequencies is chosen, they are that way until you power cycle the Tx.
It is a broadband tranmission not a narrow band one...
BTW: I discussed all of this with the JR people while in Toledo.