Where do the tweak numbers come from?
All of the recommended “optimal settings” were formulated by a combination of theory, long hours of testing, and results reported by DSLR members. The specifics of what the settings mean and why we set them a certain way for satellite connections follow. By far, the most important setting is the TCP Receive Window or RWIN. The Tcp Receive Window is nothing more than a data buffer. Think of it as a bucket. Your RWIN setting determines how big the bucket is. Data is coming down from the satellite, filling the bucket. Your computer is emptying the bucket as it processes the contents. We can’t let the bucket overflow, or we would have to ask the sender to re-send what got spilled on the floor. That’s inefficient. If the bucket gets empty, your computer is doing nothing, just waiting for the stream to start again, also inefficient. The other problem is there is a lag between the time your computer says “Send more, my bucket is almost empty” or “My bucket is almost full, please stop” and the
