Artistic License micro-scope 3a, Руководство пользователя, Страница: 20 / 73

Artistic Licence Engineering Ltd. Micro-Scope 3a user guide
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
‘MaB’ This is the mark after break time. If the start code
(menu 4) is set to ‘don’t care’ this will display the mark after
break time of all frames. It can be useful to view the mark
after break time of packets with a specific start code, which
is achieved by setting the start code in menu 4.

‘C’ This is the number of data slots in the DMX512 frame. If
the start code (menu 4) is set to ‘don’t care’ this will display
the count for all frames. This can be difficult to interpret in
networks containing data with multiple start codes. When the
start code is set to a specific value, the ‘C’ count will show
the number of data slots in all frames which match.
CHECKSUM
MODE
Checksum mode displays the calculated checksum for the last
packet received.
Both the 8 bit and 16 bit versions of the checksum are calculated.
This provides a useful check of
data integrity. If the
transmitting device (console) is
sending non-changing data, the
checksums should show a constant value. In this scenario, if the
checksum is seen to change, data corruption of the DMX signal is
occurring.
The checksum is displayed in hexadecimal format.
The checksum displayed relates to last packet received with a zero
start code. i.e. the Start Code selected in the setup menu is not
used in this display.
NB. The DMX512-A checksum implementation has not yet been
ratified by ESTA.