Smiths Medical 1884SS Operation Manual page 49

The following table shows an example of data decompression:
BYTE IN HEX
88
Marker byte, expect the next byte to be SpO
60
SpO value, HEX 60 equals to 96% SpO
2
52 Pulse Rate, HEX 52 equals to 82 bpm decimal, expect the next byte to be the byte
divided into low and high nibbles
f0
Low nibble is 0, SpO
High nibble is –1, Pulse Rate = 82bpm – 1 = 81 bpm
Low nibble is -1, SpO
ef
High nibble is –2, Pulse Rate = 82bpm – 2 = 80 bpm
30
Low nibble is 0, SpO
High nibble is 3, Pulse Rate = 80bpm + 3 = 83 bpm;
Note! Your service representative can supply an ANSI C decompression routine.
Pulse Oximeter for Sleep Screening Operation Manual
DECOMPRESSION
.
2
decimal, expect the next byte to be Pulse Rate
2
= 96% + 0 = 96%;
2
= 96% - 1 = 95%;
2
= 95% + 0 = 95%;
2
Appendix A
A-3