DVDO VP50 PRO User Manual
Page 64
Let us break it up to decipher it.
Preamble
0000 0067 000 0015
Word 1
0 so it is a learned IR code
Word 2
103 decimal which when plugged into the formula
already given yields an IR Carrier frequency of about 40kHz.
Word 3
0000 is the length of the One Time Burst. There is
no one time burst
Word 4
Decimal 21 is the length of the repeat burst. There
are 21 bits (Burst pairs) in this code. The code length is 20
bits plus 1 more pair for the Lead in.
Word 5,6
0060 0018 (96,24 decimal) The lead in Burst . 4
units of on followed by 1 unit of off, where a unit is 600
microseconds
Word 7,8
0018 0018 (24,24 decimal) Burst pair 1, bit 1 = "0"
Word 9,10
0030 0018 (48,24 decimal) Burst Pair 2, bit 2 = "1"
Word 11,12
0030 0018 (48,24 decimal) Burst Pair 3, bit 3 = "1"
Word 13,14
0030 0018 (48,24 decimal) Burst Pair 4, bit 4 = "1"
Word 15,16
0018 0018 (24,24 decimal) Burst Pair 5, bit 5 = "0"
Word 17,18
0030 0018 (48,24 decimal) Burst Pair 6, bit 6 = "1"
Word 19,20
0018 0018 (24,24 decimal) Burst Pair 7, bit 7 = "0"
The above is the function code as transmitted it is 0111010. Reversing the string
so it is a true binary number with the least significant digit on the right we get 0101110
which in decimal is 46.
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