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:SGENeral:GLOBal:SEQuence Subsystem
Agilent 81250 Parallel Bit Error Ratio Tester, Programming Reference, March 2006
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The expression is evaluated under two conditions:
• An SGEN:GLOB:SEQ:FORC command is executed.
• An SGEN:GLOB:INIT:CONT ON command is executed and the
sequence expression is changed, or another parameter is changed
that requires a new sequence / data download.
Therefore, syntax errors within the expression or range violations are
detected only after these conditions.
Adding or removing ports changes the number of "Segment" entries
needed. Therefore the sequence expression is automatically adjusted
by inserting and deleting "Segment" entries. Inserted "Segment"
entries depend on the port type:
• For INPUT_PORTs, an entry with a PAUSE0 segment is inserted.
• For OUTPUT_PORTs, an entry with a PAUSE segment is inserted.
The number of vectors depends on the system Segment Resolution as
specified by the SGEN:GLOB:MUX command. The number of vectors
must be a multiple of the Segment Resolution value. The minimum
value depends on the number of looping levels started on that block: It
must be (1 + "Number of Looping Levels Started") * "Segment
Resolution".
The sequence will be downloaded with the next SGEN:GLOB:INIT:
CONT ON command when one of the following happens:
• The channel add configuration changed (...:OUTP:CAC).
• A data port is added or deleted (SGEN:PDAT:APP, SGEN:PDAT(*):
REM).
• A terminal within a data port is added or deleted (SGEN:CONN:
PDAT(*):TERM, SGEN:CONN:PDAT(*):REM).
• The formatter mode is changed (...:DIG:STIM:SIGN:FORM).
• A frequency multiply factor is changed (...:MUX).
• The Segment Resolution is changed (SGEN:GLOB:MUX).
• A segment is changed (via the EDIT subsystem or via segment
import MMEM:SEGM:LOAD).
Limits
Vectors
Just limited by the memory of the modules.
Iterations
Up to 2
(2 or 5 depending on the clock module used (see ":<Handle>:SGENeral:
GLOBal:SEQuence:LLEVel?" on page 165).
Commands in DSR Application Subsystems
20
or infinite on the highest available looping level
159
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