3 Spectrum Analyzer Mode
3.7 Burst Power Measurement
When the USB Preamp is connected to USB, the Preamp annotation says “Preamp: USB” if the
internal preamp is off or “Preamp: USB, Int” if the internal preamp is on (only for measurements that
support the USB preamp)
Auto Function
Remote Command
[:SENSe]:POWer[:RF]:GAIN[:STATe] OFF | ON | 0 | 1
[:SENSe]:POWer[:RF]:GAIN[:STATe]?
Example
:POW:GAIN OFF
:POW:GAIN?
Preset
OFF
LNA
Lets you turn the Low Noise Amplifier (LNA) on or off.
LNA is an additional preamplifier that provides superior DANL and frequency range
compared to "Internal Preamp" on page 1981. LNA provides lower system noise
figure, especially at frequencies above 100MHz, and can be operated up to the full
range of 50GHz instruments.
For best possible sensitivity, LNA can be turned on together with "Internal Preamp"
on page 1981, although if you operate both preamps together, note that the TOI
(distortion) specifications are impacted. The sensitivity improvement of this
combination is substantial when operating in high band (frequencies above
3.6GHz).
For more details about annotation, see "More Information" on page 1278
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 OptionLNA, 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
Spectrum Analyzer Mode User's &Programmer's Reference 1277
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