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lbaops:lbascheduling

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lbaops:lbascheduling [2018/05/03 13:49]
cormac [Scan times]
lbaops:lbascheduling [2018/05/14 17:55] (current)
cormac [Scan times]
Line 159: Line 159:
  
 === Prescan === === Prescan ===
-SCHED has a parameter called '​prescan'​ which purports to start recording media early (but only works as prescribed for VLBA controllers) and should be explicitly set to 0 for LBA schedules (in some versions of SCHED it does not default to 0). Before any scans in your .key file, add the line: +SCHED has a parameter called '​prescan'​ which purports to start recording media early (but only works as prescribed for VLBA controllers) and should be explicitly set to 0 for LBA schedules (in some versions of SCHED it does not default to 0). Before any scans in your .key file, add the line:\\ 
-<​code>​ +''​prescan = 0''​ 
-prescan = 0 +
-</​code>​+
 ==== Scan Overhead ==== ==== Scan Overhead ====
 There is a 3 "​cycle"​ overhead at  ATCA. This means that at the ATCA there is a always a minimum 15 sec of invalid data between scans (this includes frequency changes, two scans observing the same source at the same frequency etc). This is not additional to slew time (ie the invalid time between scans is either 15sec or the slew time, whichever is largest).  ​ There is a 3 "​cycle"​ overhead at  ATCA. This means that at the ATCA there is a always a minimum 15 sec of invalid data between scans (this includes frequency changes, two scans observing the same source at the same frequency etc). This is not additional to slew time (ie the invalid time between scans is either 15sec or the slew time, whichever is largest).  ​
lbaops/lbascheduling.txt · Last modified: 2018/05/14 17:55 by cormac