I am learning about building an RF transmitter circuit. Now one answer in Answer to DIY RF Transmitter Circuit specified " Very first thing you have to decide on data is whether you want synchronous/asynchronous one. By which I mean the local sine wave oscillator (stage 2 above) are in phase or not."
So, my understanding of synchronous-asynchronous comes from using a clock. For example we use clock in sync-counters, so we say outputs of each flipflop is in sync with the global clock(one clock). In async-counters, we say output of each clock, in some sense, is in sync with the output of the previous block(because output of one flipflop is fed as clock into the next flipflop) and not a global clock.
Now, in above RF transmitter circuit, say my data is 1010, say I converted it into a signal like square wave where 1 becomes 5 volts and 0 becomes 0 volts and the signal has a period of 2T where T is duration for high and low in signal. I modulate it on the carrier signal generated from oscillator and I send it. When I am sending the signal then I should receive it in same order, right? Because my Left Most Bit(0) left first from transmitter side and I should receive it first at receiver side. The notion of asynchronous or synchronous does not make sense here to me.