38
“Expert”
frame format
–
data display system to the detecting unit
D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
0
1
0
1 Byte 55h - start-of-frame character
Byte AAh
1
0
1
0
1
0
1
0
0
1
1
1
0
0
0
0
D7…D4–
protocol v1.3 character
address
D7…D0–
address of the detecting unit*
0
0
0
0
1
1
0
1
D7…D0–
“
Expert
”
frame code
byte
Number of spectrum block
BLOCK
(1)
The structure of the following data is defined by the spectrum block
number
BLOCK.
(see the description below). The length of these data is always
equal to 256 bytes regardless of the
BLOCK
value
.
control
arithmetical checksum with a carry
(1)
–
spectrum block number
BLOCK
defines the structure of the following data (see
tables below). Given the value of BLOCK, equal from 0 to 7, the corresponding
fragments(blocks) of spectrum including 128 channels (256 bytes) each are
transmitted. Given the value of BLOCK, equal to 8, the parameters of the obtained
spectrum are transmitted. Given the value of BLOCK, equal to 9, the mode of
spectrum accumulation is switched on/off.
At
BLOCK = 0..7
D7 D6 D5 D4 D3 D2 D1 D0
Low byte
Number of pulses in a channel
0+(BLOCK x 128)
High byte
Low byte
Number of pulses in a channel
1+(BLOCK x 128)
High byte
…
…
Low byte
Number of pulses in a channel
126+(BLOCK x 128)
High byte
Low byte
Number of pulses in a channel
127+(BLOCK x 128)
High byte