Reference Level Offset - Keysight x-series User Reference Manual

Reference Level Offset

Enables you to add an offset value to the displayed reference level. The reference level is the absolute
amplitude represented by the top graticule line on the display.
Key Path
Remote Command
Example
Preset
State Saved
Min
Max
Initial S/W Revision
Internal Preamp
Accesses a menu of keys that control the internal preamps. Turning on the preamp gives a better noise
figure, but a poorer TOI to noise floor dynamic range. You can optimize this setting for your particular
measurement.
The instrument takes the preamp gain into account as it sweeps. If you sweep outside of the range of the
preamp the instrument will also account for that. The displayed result will always reflect the correct gain.
For some measurements, when the preamp is on and any part of the displayed frequency range is below
the lowest frequency for which the preamp has specifications, a warning condition message appears in the
status line. For example ,for a preamp with a 9 kHz lowest specified frequency: "Preamp: Accy unspec'd
below 9 kHz".
Key Path
Scope
Remote Command
Dependencies
Couplings
EMI Receiver Mode Reference
AMPTD Y Scale
:DISPlay:SCHart:VIEW[1]:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet <rel_
ampl>
:DISPlay:SCHart:VIEW[1]:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet?
DISP:SCH:VIEW:WIND:TRAC:Y:RLEV:OFFS 12.7
0 dB
Saved in instrument state
The range for Ref Lvl Offset is variable. It is limited to values that keep the reference level within the
range of –327.6 dB to 327.6 dB.
327.6 dB
A.07.00
AMPTD Y Scale
Meas Global
[:SENSe]:POWer[:RF]:GAIN[:STATe] OFF|ON|0|1
[:SENSe]:POWer[:RF]:GAIN[:STATe]?
Preamp is not available on all hardware platforms. If the preamp is not present or is unlicensed, the
key is not shown.
The preamp is not available when the electronic/soft attenuator is enabled.
The act of connecting the U7227A USB Preamplifier to one of the analyzer's USB ports will cause
the Internal Preamp to be switched on. When this happens an informational message will be
generated: "Internal Preamp turned on for optimal operation with USB Preamp." Note that if the
Internal Preamp was already on, there will be no change to the setting, but if it was Off it will be
switched On, to Full Range.
Note that this same action occurs when the SA mode is selected while the USB Preamp is
9 Strip Chart Measurement
AMPTD Y Scale
619