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94 Chapter 4
Making Measurements
Preparing for Measurements
reference level on the left, the center, or the right of the display.
This is used for X scale display either in units of frequency or
time.
Scale/Coupling key. This key couples the scale/division to the
sweep time for measurements made in the time domain.
• Amplitude / Y Scale Keys
Scale/Div key. This key enables you to set the dB/Division (for the
Spectrum and the RF Envelope windows) or V/Division (for the
I/Q window).
Ref Value key. This key allows you to set the value of the reference,
in units of dB (for the RF Envelope window), or in units of mV (for
the I/Q window).
Ref Position key. This key allows you to move the current reference
level to the top, center, or bottom of the display.