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AMPTD Y Scale
Amplitude Representations
The following is an illustration of the reference level and Y Axis scales under various conditions:
Attenuation
This menu controls the attenuator functions and interactions between the attenuation system
components.
There are two attenuator configurations in the X-Series. One is a dual attenuator configuration
consisting of a mechanical attenuator and an optional electronic attenuator. The other configuration uses
Max: The maximum Ref Level is typically:
+30 dBm + RL Offset – External Gain (for MXA and PXA)
+23 dBm + RL Offset – External Gain (for EXA and CXA)
This maximum value is determined by the maximum power that can be safely
applied to the input circuitry. The actual maximum value at any given time
may be even less than this, depending on other values including Mech Atten,
Int Preamp Gain, Swept IF Gain, FFT IF Gain, Max Mixer Level, and the
total attenuation currently available.
Note that the maximum reference level is unaffected by the input choice of
external mixing.
Default Unit: Depends on the current selected Y axis unit
Backwards Compatibility Notes: 1. In PSA, there was a restriction on Ref Level Max which was that it could
not exceed 0 dBm when the preamp was on. This restriction does not
apply to X-Series.
2. Ref Level – Ref Level is a display function, not a measurement control
function, so a change in the setting does not start a new sweep (unless
attenuation changes). This behavior differs from that of legacy analyzers
Initial S/W Revision: Prior to A.02.00