Svantek SV 973, Руководство пользователя

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SVAN 973 User Manual
– Appendixes
145
The format of the data frame is as follows:
HS L S L HE
where:
HS starting header (1 word)
L block length (1 word), expressed in words (4 + (number of samples)*1.5)
S samples of the measured signal (in the case of SV 973 each sample is written in three bytes; the
recording starts with the least significant byte)
HE ending header (1 word), which differs from the HS only on b11 bit (thanks to it, it is possible
to analyse the recorded file starting from its end)
The HEADER format is as follows:
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
where:
b15 - 1
b14 - 0
b13 - 0
b12 -
1, bits b15 ÷ b12 = 9 constitute the marker of the frame
b11 - header type:
0 - HS
1 - HE
b10 - 1 denotes the first frame in the block
b9 - 1 denotes the last frame in the block
b7 - 1 denotes an error (the samples were overwritten in the cycle buffer, which means that
the recording in the analyzed block is not correct)
b8, b6÷b0 – reserved
B.2.1.8. Record with name of the comment file
The format of the data frame is as follows:
HS D HE
where:
HS starting header (1 word)
D
The full name of the comment file (e.g. “REC62.WAV”).
HE ending header (1 word), which differs from the HS only on b11 bit (thanks to it, it is possible
to analyse the recorded file starting from its end)
The HEADER format is as follows:
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
where:
b15 - 1
b14 - 1
b13 - 0
b12 - 0,
b11 - header type: