Racelogic LabSat 3, Руководство пользователя

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10 - LabSat3 CAN Bus
LabSat 3 is capable of listening to, and recording data from, two separate CAN networks. Dual channel CAN Bus data
recording with LabSat 3 can be achieved in two ways. Depending on the mode selected, the CAN signal will be either
digitized and re-created on a raw bit level or decoded and recorded in a time-stamped text file. The CAN mode operation
is selected under the menu option ‘CAN’ in the SETUP section. When ‘digitized’ mode is selected, the channel is
configured in the ‘Digital’ menu.
DIGITIZE mode
The ‘Digitize’ mode records CAN data by listening to the bus and sampling the rising and falling edges of the raw signal.
Timing codes are inserted into the recorded GPS data so that when the file is replayed LabSat re-creates the digitized
CAN signal exactly as it appeared during recording. This mode can therefore be used to capture data along with bus-
errors or data-collisions and is synchronised to the RF signal to within approximately 60 nanoseconds. One advantage
of this mode is that there is no-need to configure CAN baud rate. During replay, the CAN data can be viewed with a
CAN Bus analyser tool such as Vehicle-SPY or CANAlyzer.
When using the digitize method the CAN data is replayed exactly as recorded, there will be no arbitration with other
systems during replay. Therefore, if the CAN data is replayed into a system which is transmitting its own CAN data,
LabSat will ‘speak’ over the top of the other CAN data. This may cause corruption of some data frames.
https://racelogic.support/03LabSat_GPS_Simulators/LabSat_3/LabSat_3_User_Manual/
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