Marine PC MPC-ML2DVR User Manual page 51

CoMMunICAtIon ProtoCoL (ContInueD)
DSCDV "Change Displayed Video" Command
The DSCDV Change Displayed Video command is used to change the input video source.
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0 Source
Example: $DSCDV,C1*18[CR][LF]
Video changed to Composite 1 input.
Response: DSACK or DSNAK
DSIBt "Initiate IBIt" Command
The DSIBT Initiate IBIT command starts the IBIT System Test. Immediately upon receiving
DSIBT, the PSM responds with DSBTR (Request IBIT Results), indicating the IBIT test set is
incomplete. When IBIT completes, the DSBTR is transmitted with IBIT results. The DVR is
unable to process any commands until the IBIT test has completed.
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0 Placeholder
Example: $DSIBT,00*64[CR][LF] (Command runs.)
Response: DSBTR: transmitted after IBIT test with IBIT not completed, then again after IBIT
completes, with test set results. DSNAK: command not recognized or contained errors.
DSBtQ "request IBIt results" Command
The DSBTQ Request IBIT Results command requests the DVR to transmit the last IBIT Sys-
tem Test results. Use DSIBT (Initiate IBIT) command if a test needs to be run.
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0 Placeholder
Example: $DSBTQ,00*7C[CR][LF]
Requests an IBIT response from PSM
Response: DSBTR or DSNAK
DSBtr "IBIt response" Command
The DSBTR IBIT Response command contains status information and results from running
IBIT System Test. When DSIBT (initiate IBIT) is received, the DVR immediately transmits an
IBIT response with status flags bit 7 set low. Upon completion, the DVR transmits a second
response message with status flags bit 7 set high, with test results.
Data
C1, C2, C3, C4
Data
00
Data
00
MPC-ML2DVR-UM(A) 3/2015
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