Transmission Timing - FUTABA FDP02TJ010 Instruction Manual

Ver.1.1

3. Transmission Timing

3.1 Transmission Timing
At packet transmission mode, the FDP02 can transmit up to 130 bytes of message as a single packet.
However, the radio transmission unit of the data is divided by 26 bytes. Since the FDP02 internally divides a
message by 26 bytes when the packet size is bigger than 26 bytes, total data transmission time is varies with
the data size. .
In headerless packet transmission mode, the FDP02 transmits each message in units of 26 bytes without
dividing them.
The time required for communication is shown below.
Host 1
Data input
First message
transmission
Second to fourth
message
transmission
Fifth message
transmission
FDP02 (Sender)
①@TXT*** input
②Command processing: 1 ms
③Packet generation (first time): 0.7 ms
⑤Carrier sensing: 0.1 ms
④P1 response output
⑩ACK reception
processing: 0.7 ms
③Packet generation (fifth time): 0.7 ms
⑤Carrier sensing: 0.1 ms
⑩ACK reception
processing: 0.7 ms
⑫P0 response output
⑥Message transmission: 0.45 ms
⑧ACK packet generation: 0.7 ms
⑨ACK transmission: 0.45 ms
⑥Message transmission: 0.45 ms
⑧ACK packet generation: 0.7 ms
⑨ACK transmission: 0.45 ms
6
FDP02 (Receiver)
⑦Reception
processing: 1.2 ms
⑦Reception
processing: 1.2 ms
⑪RXT*** output
Host 2
4.3 ms