Agilent Technologies N8201A Service Manual download pdf (Page 135)

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Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz 135

X Axis Units

Selects how the limit-line segments are defined. Pressing X Axis Units selects whether the

limit lines will be entered using frequency (Freq) or sweep time (Time) to define the

segments. They can be specified as a table of limit-line segments of amplitude versus

frequency, or of amplitude versus time. A time value of zero corresponds to the start of the

sweep, which is at the left edge of the graticule. Switching the limit-line definition between

Freq and Time will erase both of the current limit lines. The following message will appear

on screen:

Changing X axis units will delete all limits. If you are sure, press key again to change units.

Changing this setting deletes all existing limit data from the N8201A. In other words, if a

limit line has already been defined, changing the units clears the existing limit line.

Press X Axis Units again to purge both limit lines and to switch between frequency and

time.

Key Path: Display, Limits

Factory Default: Frequency for a new limit.

Remote Command:

:CALCulate:LLINe:CONTrol:DOMain FREQuency|TIME

:CALCulate:LLINe:CONTrol:DOMain?

Remote Command Notes: For TIME, the limit line segments are placed on the spectrum

analyze display with respect to the sweep time setting of the N8201A, with 0 at the left

edge of the display.

For FREQuency, segments are placed according to the frequency that is specified for each

segment.

Example:

:CALC:LLIN:CONT:DOM FREQ sets limit lines 1 and 2 x-axis units to frequency.

:CALC:LLIN:CONT:DOM TIME sets limit lines 1 and 2 x-axis units to time.

:CALC:LLIN:CONT:DOM? responds with limit lines 1 and 2 x-axis unit type.

Limits (Fixed Rel)

Specifies whether the current limit lines are fixed or relative.

The fixed (Fixed) type uses the current limit lines as a reference with fixed frequency and

amplitude values. The relative (Rel) setting results in the current limit-line value to be

relative to the displayed center frequency and reference level amplitude values. When limit

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Agilent Technologies N8201A Service Manual Page 135

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