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AMPTD Y Scale
Standard Path
This path gives the best remote-control throughput, minimizes acoustic noise from switching and
minimizes the risk of wear in the hardware switches, particularly in remote test scenarios where both low
band and high band setups will follow in rapid succession.
In this path, the bypass of the low band/high band switch and microwave preamp is never activated,
which can cause some noise degradation but preserves the life of the bypass switch.
Low Noise Path Enable
You may choose Low Noise Path Enable, which gives a lower noise floor under some circumstances,
particularly when operating in the 21–26.5 GHz region. With the Low Noise Path enabled, the low
band/high band switch and microwave preamp are bypassed whenever all of the following are true:
• The analyzer is not in the Low Band, meaning:
— the start frequency is above 3.5 GHz and
— the stop frequency is above 3.6 GHz.
• the internal preamp is not installed or (if installed) is set to
Off or Low Band
Note that this means that, when any part of a sweep is done in Low Band, the Low Noise Path is not
used, whether or not the
Low Noise Path Enable is selected in the user interface. Also, if the preamp is
turned on, the Low Noise Path is not used, whether or not the
Low Noise Path Enable is selected in the
user interface. The only time the Low Noise Path is used is when
Low Noise Path Enable is selected,
the sweep is completely in High Band (> 3.6 GHz) and no preamp is in use.
Dependencies: Unavailable in BBIQ and External Mixing
Preset: All modes other than IQ Analyzer mode and VXA: STD
IQ Analyzer, VXA and WLAN mode:
MPB option present and licensed: MPB
MPB option not present and licensed: STD
State Saved: Save in instrument state
Readback: Value selected in the submenu
Initial S/W Revision: A.04.00
Modified at S/W Revision: A.10.00
Key Path:
AMPTD Y Scale, µW Path Control
Example: :POW:MW:PATH STD
Readback Text: Standard Path
Initial S/W Revision: A.04.00