Yes that is correct. We have them in store too at
http://store.jdrones.com/RDF900_Telemet ... 00mdm1.htmBut yeah, those are really robust modems. Seppo who is the designer (and a Finnish guy too) he is a long term RF guy and he knows what he is doing.
Many times people just place components on PCBs according manufacturer basic proposals on datasheets and thats it...
Especially when playing with RF, you really need to know what you are doing. Seppo plays a lot with different type RF combinations to get best results on hes designs.
OT: Btw he has beautiful "hobby plane" called Antonov 2. He's father have another plane back in Finland and they are using that as Skydiving bus.. You know, One-Way-Ticket
Check for fun:
http://an2.com.au/