3 VMA Mode
3.1 Digital Demod Measurement
Notes If :INIT:CONT is ON, then a new continuous measurement will start immediately, with sweep (data
acquisition) occurring once the trigger condition has been met
If :INIT:CONT is OFF, then :INIT:IMM is used to start a single measurement, with sweep (data
acquisition) occurring once the trigger condition has been met
Dependencies For continuous measurement, :ABORt is equivalent to the Restart key
Not all measurements support this command
Status Bits/OPC
dependencies
The STATus:OPERation register bits 0 through 8 are cleared , except bit 6 (Waiting for Periodic
Sync). Initiating a measurement and Waiting for Periodic Sync could be asynchronous
The STATus:QUEStionable register bit 9 (INTegrity sum) is cleared
Since all the bits that feed into OPC are cleared by :ABORt, the Abort command will cause the *OPC
query to return true
3.1.10.2 X Scale
Accesses controls that enable you to set the horizontal scale parameters.
X Width
Set the width of the X axis which is displayed for the selected trace. The X width can
be set less than the span for frequency-domain traces, enabling you to zoom in on
just a portion of the measured values. Likewise, it can be less than time span
covered by time-domain data. This plus the X Reference Value and X Reference
Position control the range of X values that can be displayed on a trace.
Remote Command
:DISPlay:DDEMod:WINDow[1]|2|…|6:X[:SCALe]:WIDTh <real>
:DISPlay:DDEMod:WINDow[1]|2|…|6:X[:SCALe]:WIDTh?
Example
:DISP:DDEM:WIND3:X:WIDT 10e6
Set the X width of the third window to 10 MHz
:DISP:DDEM:WIND3:X:WIDT?
Query the X width of the third window
Couplings If Auto Scaling is On, the X Width is determined by the trace data
Preset Depends on trace data
State Saved Yes
Min/Max -9.9E+37 / 9.9E+37
Ref Value
Controls the X value of the selected trace at the chosen X Reference Position.
Remote Command
:DISPlay:DDEMod:WINDow[1]|2|…|6:X[:SCALe]:RLEVel <real>
Vector Modulation Analyzer Mode User's &Programmer's Reference 396
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