Sampling Service

The RT channels on MIL-1553 modules support this service.

The sampling service on a RT channel is useful to sample the status and data that are sent from the BC and other RTs to the RT, but without resorting to the use of the BM channel.

With RT channels, this service must use the message mode. The monitor mode is an attribute changed on the BM channel, so in this case, the BM channel monitor mode must be set to message mode (see the KMXF_MIL1553_BM_MODE attribute). If the BM monitor mode is not set to message mode, RT channels will receive nothing. Sampling with RT channels work differently than with BM channels. The data transmitted by the RT is not received by this RT.

The following possibilities will be received by RT channel:

• RXCmd/Data
• TXCmd
• RXCmd/TXCmd/TXStatus/Data (receiver side)
• RXCmd/TXCmd/RXStatus (transmitter side)
• ModeCode/Status
• TXModeCode/Status/Data (Data is optional)
• RXModeCode/Data/Status (Data is optional)

Note

No-response messages are not received by RT channels.
TX Periodic Update Message service must be active on the RT to receive with this RT channel.

Refer to the MXF_MIL1553_SAMPREC structure for acquisition data reading.

The same options for sampling filtering of BM channels apply to RT channels.