|File||$Source: /home/juda/www/hrc_flight/RCS/nil_mode.html,v $|
|Version||$Revision: 1.7 $|
|Last Update||$Date: 1999/05/10 18:08:08 $|
|HRC CCB Status||Approved|
Note: This particular example assumes that the HRC next-in-line format we are switching to is format 2 (ACIS observing mode). A similar sequence must be performed when switching to any format where the HRC has the next-in-line telemetry allocation (all formats but #1?). In the sequence below this is done by a change of the second command to the approprate mnemonic for the desired format (e.g. CSELFMT4) and changing the telemetry verifier to the corresponding value (e.g. CCSDSTMF = FMT4 for the previous command example).
The serial digital command to the HRC to switch the synchronization signal is sent first; followed by the command to the CTU to change formats. Serial digital commands to the HRC to reset and then re-enable the serial digital telemetry FIFOs are then issued; this flushes the buffers and restarts them.
|Delta-Time||Command Mnemonic||Description||Cmd Field Mnemonic||Data Parameter||Telemetry Verifier||Expected Value||Notes|
|00:00:01.000||2NXILASL||Select timing for HRC next-in-line mode telemetry||2OBNLASL||NEXT||sd1a01|
|00:00:00.500||CSELFMT2||CTU telemetry mode select format 2||CCSDSTMF||FMT2|
|00:00:01.000||2FIFOAOF||Reset event data fifo||2FIFOAVR||RSET||sd4500|
|00:00:01.000||2FIFOAON||Enable event data FIFO||2FIFOAVR||ENAB||sd4501|
$Log: nil_mode.html,v $
Revision 1.7 1999/05/10 18:08:08 jhc
corrected initial time delay to 1 sec
Revision 1.6 1998/09/11 20:51:55 juda
changed "Caution" of 1 major frame to synch to as many as 3 - minor grammar corrections to description section.
Revision 1.5 1998/06/08 17:52:08 juda
corrected spelling error "Rest" to "Reset"
Revision 1.4 1998/05/13 19:07:07 juda
Added "File" entry to version table
Revision 1.3 1998/05/07 12:01:24 juda
corrected description text for 2NXILASL mnemonic - this is next-in-line timing
Revision 1.2 1998/05/06 19:30:28 juda
Marked as approved
Revision 1.1 1998/05/05 13:04:31 juda
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