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SV 200A User Manual
B.2.7 Record with audio data
This record exists only in the case when the
EVENT RECORDING
function is active (Table B.1.8).
Samples of the signal, taken in the periods from 1 second to 60 seconds, are saved in the blocks.
Each lock is divided into frames, which are stored in a file among the logger results. The frame starting
block and the frame ending it are marked with the set b10 and b9 bits in the header of the frame,
respectively. It happens in the case of stopping the recording that the ending frame does not exist.
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 200 each sample is written according to
BitsPerSample parameter; 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 analysed block is not correct)
b8, b6÷b0 – reserved
B.2.8 Record with the meteo data
Word
number
Name
Comment
0
0xC1nn
nn= size of records
1
Temperature
temperature [*10 °C]
2
Pressure
pressure [hPa]
3
Humidity
humidity [*10 %]
4
AvgWindSpeed
average wind speed [*10 m/s]
5
WindDirection
wind direction for max wind speed [°]
(0xFFFF if direction is unavailable)
6
MaxWindSpeed
max wind speed [*10 m/s]
(ignored if WindDirection is unavailable)
7..8
WindDirTotalPuffs
wind direction distribution vector
number of total wind puffs
9
RainDetection
rain detection flag
10
RainAcc
Rain Accumulation [*100 mm]
11
RainDuration
Rain Duration [s]
12
RainIntens
Rain Intensity [mm/h]
