Configuration Aspects for Programmers
Appendix C
C-20
NetScan User’s Manual
Multiple Trigger Blocks
Through the Auto-Rearm capability of the NetScan, it is possible to capture more than one trigger block in the
unit’s Acquisition Buffer. Each trigger block would contain one and only one trigger point.
These trigger blocks are stacked end-to-end in the buffer; as the last reading of the first trigger block is read by
the controller, the next scan to be read will be from the second trigger block. The trigger can only be re-armed
after a trigger block has been completed. If the Auto-Rearm feature is not in use, a T command must be issued
to re-arm the NetScan for acquisition.
It is important to note Auto-Rearm does not allow the user to change the configuration while armed. To stop
Auto-Rearm, the user must issue a
T
command with the flag set to zero.
If Auto-Rearm is selected, another acquisition will take place on the next trigger without any controller
intervention. This allows NetScan to store several acquisitions contiguously in its internal memory. The buffer
locations of the trigger points and their associated time tags can be found in the Buffer Status String. The read
pointer is always on the oldest unread trigger block, so requests for pointer status will always correspond to the
trigger block available to be read. The next trigger, however, must be initiated AFTER the previous acquisition
was completed. Otherwise, a trigger overrun will occur.
Additional information about triggering and trigger error conditions can be found in the sections “Trigger
Latency” and “Trigger Overrun” later in this appendix.
Summary of Contents for OMB-NETSCAN 1500
Page 6: ...iv NetScan User s Manual...
Page 18: ...1 12 Configuring and Starting NetScan NetScan User s Manual Notes...
Page 38: ...3 8 General Information and Specifications NetScan User s Manual Notes...
Page 82: ...4 44 ChartView Software Reference NetScan User s Manual Notes...
Page 118: ...6 20 Calibration NetScan User s Manual...
Page 140: ...A ii NetScan User s Manual...
Page 192: ...API Command Reference Appendix A A 52 NetScan User s Manual Notes...
Page 237: ...Appendix D Registers Data Formats Queries NetScan User s Manual D 13...
Page 244: ...NetScan Program Examples Appendix E E 2 NetScan User s Manual...
Page 248: ...ASCII Code Summary Appendix F F 4 NetScan User s Manual Notes...
Page 250: ...NetScan Error Messages Appendix G G 2 NetScan User s Manual Notes...
Page 252: ...Abbreviations Appendix H H 2 NetScan User s Manual Notes...
Page 254: ...NetScan User s Manual...
