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4. Service
I R Tr a n s m i s s i o n
Transmission format: Sharp 15bit
15 bit data signal by PPM (Pulse position modulation) is used for RC signal transfer.
This format is consists of a pair of
This format is consists of a pair of
“D” (head type) and “d” (back type) codes. “D” and “d” codes are identified
by
“Judge bit”(1 bit):
One
“D” (head type) codes are consisted by “system address”(normal) and rest of normal signals.
One
“d” (back type) codes are consisted by “system address”(normal) and rest of reverse signals.
First of all, receiver checks the
“judge bit”. If judge bit indicates “d” type, receiver reverses the received data
(except
“system address” part), and compare “D” code. When “D” code and decoded “d” code are the same,
the received codes are recognized as correct codes
87
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