Keysight E6680A - Μw Path Control

3 IQ Analyzer (Basic) Mode
3.1 Complex Spectrum Measurement
(distortion) specifications are impacted. The sensitivity improvement of this
combination is substantial when operating in high band (frequencies above
3.6GHz).
For more details about annotation, see "More Information" on page 172
Remote Command
[:SENSe]:POWer[:RF]:GAIN:LNA[:STATe] OFF | ON | 0 | 1
[:SENSe]:POWer[:RF]:GAIN:LNA[:STATe]?
Example
:POW:GAIN:LNA ON
Dependencies Requires OptionLNA, except for VXT models M9415A/16A
Does not appear in VXT models M9420A/10A/11A
M9410E/11E/15E/16E support LNA
May not appear in some measurements
LNA is not available when the electronic/soft attenuator is enabled
Preset
OFF
State Saved Saved in State
More Information
When LNA is installed, the preamp annotation changes to show the state of both
LNA and Internal Preamp. Below is an example:
Note that when operating entirely in the low band (below about 3.6GHz), if LNA is
on, Internal Preamp is switched off (even if you have its switch set to ON). This is
because the noise performance is actually degraded in low band if both preamps are
on. In this case, the annotation reflects the actual state of the two preamps, but the
Internal Preamp annotation displays in amber, to warn you that the actual state of
Internal Preamp does not match its switch control display:
µW Path Control
Options for this control include µW Preselector Bypass (Option MPB), Low Noise
Path (Option LNP) and Full Bypass Enable in the High Band path circuits.
When the µW Preselector is bypassed, flatness is improved, but will be subject to
spurs from out of band interfering signals. When Low Noise Path Enable is selected,
the instrument automatically bypasses certain circuitry in the high frequency bands
IQ Analyzer Mode User's &Programmer's Reference 172