LRI512
SOF When Using Two Subcarriers
High Data Rate. SOF comprises 3 parts: (see
Figure 22)
– 27 pulses of 484.28 kHz (fc/28),
– 24 pulses of 423.75 kHz (fc/32),
– a logic 1 which starts with 9 pulses of
484.28 kHz followed by 8 pulses of 423.75 kHz.
Low Data Rate. SOF comprises 3 parts: (see
Figure 23)
– 108 pulses of 484.28 kHz (fc/28),
– 96 pulses of 423.75 kHz (fc/32),
– a logic 1 which starts with 36 pulses of
484.28 kHz followed by 32 pulses of
423.75 kHz.
Figure 22. Start of Frame, High Data Rate, Two Subcarriers
112.39 µs
Figure 23. Start of Frame, Low Data Rate, Two Subcarriers
37.76 µs (ISO=37.46 µs)
AI06673
449.56 µs
149.86 µs ± 0.3 µs
AI06674
12/54