3 VMA Mode
3.1 Digital Demod Measurement
Type
Selects whether the limit you are editing is an upper or lower limit. An upper limit
fails if the trace exceeds the limit. A lower limit fails if the trace falls below the limit.
Remote
Command
:CALCulate:DDEMod:LLINe[1]|2|…|6:TYPE UPPer | LOWer
:CALCulate:DDEMod:LLINe[1]|2|…|6:TYPE?
Example
:CALC:DDEM:LLIN2:TYPE LOW
Sets limit line 2 to act as a lower limit
Couplings If a margin has already been set for this limit line, and this control is used to change the limit type, then
the margin value will reverse sign
Preset UPPer for Line 1, 3, and 5; LOWer for Line 2, 4, 6
Not affected by Mode Preset, preset by Restore Mode Defaults
State Saved Saved in instrument state
Delete All Limits
Deletes all limit lines. Pressing Delete All Limits purges the data from all limit line
tables.
All limit data will be cleared and returned to factory preset settings.
When this control is pressed a prompt appears on the screen that says “Please press
Enter or OK to delete all limits. Press ESC or Cancel to close this dialog.” The
deletion is only performed if you press OK or Enter; if so, after the deletion, the
informational message “All Limits deleted” appears in the MSG line.
Remote
Command
:CALCulate:DDEMod:LLINe:ALL:DELete
Example
:CALC:DDEM:LLIN:ALL:DEL
Deletes all data for all limit lines
Limit Line Fail? (Remote Command Only)
Tests a limit line against its associated trace window. It performs the test when both
Limit and Limit Test are On, returns a 0 if the trace is within the limit, a 1 if the trace
exceeds the limit. If either or both Limit and Limit Test is Off, it returns a 0.
Note that this command only tests one limit line – other limit lines are not tested
when executing this command. To see whether a trace passed all limits, use
:CALCulate:DDEMod:WINDow[1]|2|3|4|5|6:FAIL?.
Remote
:CALCulate:DDEMod:LLINe[1]|2|…|6:FAIL?
Vector Modulation Analyzer Mode User's &Programmer's Reference 386
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