Fixed/ Relative - Keysight x-series User Reference Manual

Fixed/ Relative

Accesses a menu that enables you to specify that the selected limit is relative to either the Center
Frequency or the Reference level.
Key Path
Readback
Initial S/W Revision
Relative to CF
Chooses whether the limit line frequency points are coupled to the instrument center frequency, and
whether the frequency points are expressed as an offset from the instrument center frequency. If the limit
lines are specified with time, this has no effect. The limit table must in this case support negative
frequencies.
For example, assume you have a frequency limit line, and the analyzer center frequency is at 1 GHz. If
Relative to CF is "Off", entering a limit line segment with a frequency coordinate of 300 MHz displays the
limit line segment at 300 MHz, and the limit line segment will not change frequency if the center frequency
changes. If Relative to CF is "On", entering a limit line segment with a frequency coordinate of 300 MHz
displays the limit line segment at CF + 300 MHz, or 1.3 GHz. Furthermore, if the center frequency changes
to 2 GHz, the limit line segment will be displayed at CF + 300 MHz, or 2.3 GHz.
It is possible to change this setting after a limit line has been entered. When changing from On to Off or
vice-versa, the frequency values in the limit line table change so that the limit line remains in the same
position for the current frequency settings of the analyzer.
Key Path
Remote Command
Example
Notes
Couplings
Preset
State Saved
Range
Initial S/W Revision
EMI Receiver Mode Reference
Meas Setup, Limits, Properties
[Fixed] – if both Relative to CF and RL set to OFF. [Rel to RL] – if only RL set to ON. [Rel to CF] – if only
CF set to ON. [Rel to CF + RL] – if both Relative to CF and RL set to ON.
A.07.00
Meas Setup, Limits, Properties, Fixed/Relative
:CALCulate:FSCan:LLINe[1]|2|...|6:FREQuency:CMODe:RELative ON | OFF | 1
| 0
:CALCulate:FSCan:LLINe[1]|2|...|6:FREQuency:CMODe:RELative?
CALC:FSC:LLIN:FREQ:CMOD:REL ON Makes limit line 1 relative to the Center freq.
If the Trace Domain is changed to Time (:CALCulate:LLINe:CONTrol:DOMain TIME), the SCPI
command : :CALCulate:LLINe[1]|2|3|4|5|6:FREQuency:CMODe:RELative ON|OFF|1|0 will have no
effect.
Pressing this button makes Center Frequency the active function.
Off, not affected by Mode Preset, preset by Restore Mode Defaults.
Saved in instrument state.
On|Off
A.07.00
8 Frequency Scan Measurement
Meas Setup
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