Simple Telemetry After developing a simple pulsed location RF beacon, the next step is to actually transmit some form of data about the flight back to the receiver. Initially, in order to keep the design simple, the next step is to develop a simple circuit to provide 2 output frequencies, one for the launch and ascent to apogee, and a different frequency to signal that the recovery system had been deployed. The beauty of a telemetry system as simple as this is that it only needs the addition of 1 resistor to the previous pulse output circuits !