Vertical Axis Scaling - Agilent Technologies ESA Series User's/Programmer's Reference

Setting the reference level offset value first yields the following:
If the reference level offset is (first) set to –30 dB, then the
reference level can be set to values of –327.6 to 25 dBm. The
reference level is "clamped" at 25 dBm because its positive
value of 55 dBm is reached at 25 dBm with an offset of –30 dB.
Its own positive amplitude limit applies.
If the reference level offset is (first) set to 30 dB, then the
reference level can be set to values of –327.6 to 85 dBm. Again,
the positive amplitude limit of reference level (alone) is factored
in to the resultant combined limit.
Front Panel
Access: Amplitude Y Scale, Ref Level Offst

Vertical Axis Scaling

:DISPlay:WINDow:TRACe:Y[:SCALe]:SPACing LINear|LOGarithmic
:DISPlay:WINDow:TRACe:Y[:SCALe]:SPACing?
Specifies the vertical graticule divisions as log or linear units.
Factory Preset
and *RST: Logarithmic
Front Panel
Access: AMPLITUDE/Y Scale, Scale Type Log Lin
Chapter 5
Remote Command Reference
DISPlay Subsystem
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