Chapter 2 191
Front-Panel Key Reference
SPAN X Scale (Spectrum Emission Mask)
SPAN X Scale (Spectrum Emission Mask)
If Spectrum Emission Mask is selected in the MEASURE menu, SPAN X
Scale
accesses the following keys.
Scale/Div Sets the frequency units per horizontal graticule division on the display.
To determine full display frequency span, multiply the frequency span
per horizontal graticule division by 10.
Key Access:
MEASURE, Spectrum Emission Mask, SPAN X Scale
Ref Value
Sets the frequency represented by the selected horizontal graticule line
on the display (the reference). The current value is indicated by Ref in
the upper left corner of the display. You can change the reference value
using the step keys, the knob, or the numeric keypad. You can set the
reference line location using the
Ref Position setting.
Key Access:
MEASURE, Spectrum Emission Mask, SPAN X Scale
Ref Position
Positions the X-Scale reference to the extreme left line, center line, or
extreme right line of the display graticule.
Key Access:
MEASURE, Spectrum Emission Mask, SPAN X Scale
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