Keysight Technologies N9340B User Manual page 90

Key Reference
Amplitude
HiSensitivity
Key access: [AMPTD] > {HiSensitivity}
Press this softkey On to set 0 dB attenuation, -50 dBm
reference level and turn the pre-amplifier on. It's very
helpful to observe the low-level signals with this
settings.
Ref Offset
Key access: [AMPTD] > {Ref Offset}
Adds an offset value which ranges from -327.6 dB to
+327.6 dB, to the displayed reference level.
Reference-level offsets are only entered by using the numeric
NO TE
keypad. Entering an offset does not affect the trace or the
attenuation value.
Reference-level offsets are used when gain or loss
occurs between a device under test and the analyzer
input. Thus, the signal level measured by the analyzer
may be referred to as the level at the input of an external
amplitude conversion device. When an amplitude offset
is entered, its value appears in the lower left corner of
the display.
Y Axis Units
Key access: [AMPTD] > {More} > {Y Axis Units}
Sets the amplitude units.
Amplitude units are maintained for both logarithmic and linear
NO TE
modes depending on the Scale Type setting.
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