Simple question, how do I know what over the air data rate (and over the wire baud rates) to pick for my RF telemetry link to ensure I have enough bandwidth for the refresh rates I have picked for the various streams ?
Have read with ECC switched off the air rate to baud rate throughput is about 90%, and with it switched on this is about 50%. So this tells me how to scale air rate to baud rate. But how do I ensure I pick a high enough rate to start with ? And what about GPS Injecton or adding in the RC signals as the RFD868x allows you to do ?
Is there a rule of thumb for how much link margin you loose when increasing your data rate ? For instance does doubling the over the air data rate loose you 3dB of link margin ?
I have also tried asking RFDesigns but so far 3-4 emails (on different subjects) have yeilded zero response. Fairly unimpressed with them. I can theorize the bandwidth the RC signals consume. 11bit/2048 resolution (0.5us resolution over 1000us) on 8 channels, with a 22.5ms frame rate gives, 11 x 8 x 45 = 3960 bps but there are a lot of assumptions there.