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Chapter 2 59
Instrument Functions: A - L
AMPLITUDE / Y Scale
Instrument Functions: A - L
Annotation: The offset is displayed to left of Trace window; third from the top, just
below the scale type.
State Saved: Saved in Instrument State
Factory Preset: 0.0 dB
Range: –327.6 dB to 327.6 dB
Remote Command:
:DISPlay:WINDow[1]:TRACe:Y:[SCALe]:RLEVel:OFFSet <rel_power> (in dB)
:DISPlay:WINDow[1]:TRACe:Y:[SCALe]:RLEVel:OFFSet?
Example: DISP:WIND:TRAC:Y:RLEV:OFFS 12.7 Sets the Ref Level Offset to 12.7 dB.
The only valid suffix is dB. If no suffix is sent, dB will be assumed.
2.0.9 Int Preamp
(Option 1DS only.) Turns the internal preamp on and off. The preamp functions over a
frequency range of 100 kHz to 3 GHz. When the preamp is on, an automatic adjustment
compensates for the gain of the preamp so that displayed amplitude readings still
accurately reflect the value at the analyzer input connector. The preamp is switched off for
frequencies above 3 GHz, and the correction is not applied, even though the PA annotation
remains on screen. For signal frequencies below 100 kHz, the preamp is not automatically
switched out, but signal amplitude roll-off occurs even in the “DC” setting of the RF
Coupling control.
The gain of the preamp is nominally 30 dB (PSA) or 20 dB (ESA).
Key Path:
AMPLITUDE / Y Scale
Dependencies/
Couplings: Reference level, Attenuation
State Saved: Saved in Instrument State
Factory Preset: Off
Remote Command:
[:SENSe]:POWer[:RF]:GAIN[:STATe] OFF|ON|0|1
[:SENSe]:POWer[:RF]:GAIN[:STATe]?
Example: POW:GAIN 1
POW:GAIN?
2.0.10 Corrections
Accesses the Corrections menu keys that allow you to enable the corrections function and to