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"Expert" frame format – data display system to the detecting unit
D7
D6
D5
D4
0
1
0
1
1
0
1
0
0
1
1
1
address
0
0
0
0
byte
The structure of the following data is defined by the spectrum block
(see description below). The length of these data is always equal to
control
(1)
– spectrum block number BLOCK defines the structure of the following data.
Given the value of BLOCK, equal from 0 to 7, the query is sent for corresponding
fragments (blocks) of spectrum including 128 channels (256 bytes) each. Given the
value of BLOCK, equal to 8, the query is sent for parameters of the obtained
spectrum. Given the value of BLOCK, equal to 9, the mode of spectrum accumulation
is switched on/off.
At BLOCK = 0..8 – values of two succeeding bytes is disregarded.
At BLOCK = 9
D7
D6
D5
D4
1
0
0
0
0
0
0
0
– the counter of spectrum accumulation duration is reset and spectrum
(1)
accumulation is started.
0x0B – Expert (spectrum, DER, temperature, error);
0x0E – Firmware;
D3
D2
D1
D0
0
1
0
1
1
0
1
0
0
0
0
0
1
0
1
1
number BLOCK.
2 bytes regardless of the BLOCK value.
D3
D2
D1
D0
1
1
0
0
a
0
0
0
0
Byte 55h - start-of-frame character
Byte AAh
D7...D4– protocol v1.3 character
D7...D0– address of the detecting unit*
Експерт
D7...D0– "
" frame code
Number of spectrum block BLOCK
arithmetical checksum with a carry
Password (0x8C)
a = 1 – accumulated spectrum is reset to
;
(1)
37
(1)
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