Margin - Keysight x-series User Reference Manual

10 Monitor Spectrum Measurement
Meas Setup
Example
Preset
State Saved
Backwards
Compatibility SCPI
Backwards Compatibility
SCPI Notes
Initial S/W Revision

Margin

Selects a margin for this limit, which will cause a trace to Fail Margin when the trace is between the limit
line and the margin line. Portions of the traces that pass the limit but fail the margin will be displayed in an
amber color. .
A margin is always specified in dB relative to a limit. Since there is only an upper limit in the Monitor
Spectrum measurement, the margin is always negative. If a value is entered with the incorrect sign, the
system will automatically take the negative of the entered value.
When the Margin is selected, it may be turned off by pressing the Margin key until Off is underlined. This
may also be done by performing a preset. Margin is the default active function whenever the margin is on,
and it is not the active function whenever the margin is off.
The margin lines are displayed in the same color, but paler, as limit lines. If the limited trace is blanked
then the limit line and the margin line will be blanked as well.
Key Path
Remote Command
Example
Notes
Preset
State Saved
Min
Max
Default Unit
Initial S/W Revision
796
CALC:LLIN:COMM "European Emissions"
"" (null String), not affected by Mode Preset, preset by Restore Mode Defaults.
Saved in instrument state
:CALCulate[1]|2:LIMit[1]|2|...|6:COMMent
This command above is included for ESU compatibility. The suffix [1]|2 is irrelevant to the
measurement, they are added solely for remote language compatibility.
A.13.00
Meas Setup, Limits
:CALCulate:LLINe[1]|2|...|6:MARGin <rel_ampl>
:CALCulate:LLINe[1]|2|...|6:MARGin?
:CALCulate:LLINe[1]|2|...|6:MARGin:STATe ON|OFF|1|0
:CALCulate:LLINe[1]|2|...|6:MARGin:STATe?
CALC:LLIN6:MARG –4dB Set Limit line 6's margin to –4 dB.
CALC:LLIN2:MARG:STAT OFF ! Turns off the margin for limit line 2 and removes any tests associated
with that margin line.
The queries "Limit Line Fail?" :CALCulate:LLINe[1]|2|3|4|5|6:FAIL? will return 1 if the margin fails.
Not affected by Mode Preset, set to 0 dB for all Limits by Restore Mode Defaults.
Saved in instrument state
–40 dB
0 dB
dB
A.13.00
EMI Receiver Mode Reference