Agilent Technologies Signal Analyzer N9030a - Manual (Page 807)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Meas Setup
Fixed / Relative
Opens a menu which will allow you to specify that the selected limit is relative to either Center
Frequency or Reference level.
Key Path Meas Setup, Limits, Properties
Readback Fixed|Rel to CF|Rel to RL|Rel to CF + RL (square brackets)
Backwards Compatibility
Notes You can now set relative amplitude and relative frequency independently for each limit line.
:CALC:LLIN:CMOD REL makes all limit lines relative to the center frequency and reference level.
:CALC:LLIN:CMOD? returns 1 if Limit Line 1 is set Relative to CF, and returns 0 otherwise.
Initial S/W Revision A.02.00
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.
Pressing this button makes Center Frequency the active function.
Key Path Meas Setup, Limits, Properties, Fixed/Relative
Remote Command :CALCulate:LLINe[1]|2|...6:FREQuency:CMODe:RELative ON | OFF | 1 | 0
:CALCulate:LLINe[1]|2|...6:FREQuency:CMODe:RELative?
Example :CALC:LLIN:FREQ:CMOD:REL ON makes limit line 1 relative to the center frequency.
Notes If the Trace Domain is changed to Time (:CALCulate:LLINe:CONTrol:DOMain TIME), the
command : :CALCulate:LLINe[1]|2|3|4|5|6:FREQuency:CMODe:RELative ON|OFF|1|0 will
have no effect.
Couplings Pressing this button makes Center Frequency the active function.
Preset Off, not affected by Mode Preset, preset by Restore Mode Defaults.
Remote Language Compatibility Measurement Application Reference 807