10 Monitor Spectrum Measurement
AMPTD Y Scale
None
This is selected if no Antenna Unit is currently on, however you cannot actually set this value, since it is
always grayed out. The key is included simply to provide an indication on the Readback line of the Antenna
Unit key when there is no Antenna Unit selected.
Key Path
AMPTD Y Scale, Y Axis Unit, Antenna Unit
Readback “None”
Initial S/W Revision A.11.00
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
AMPTD Y Scale
Remote Command
:DISPlay:MONitor:VIEW[1]:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet <rel_
ampl>
:DISPlay:MONitor:VIEW[1]:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet?
Example DISP:MON:VIEW:WIND:TRAC:Y:RLEV:OFFS 12.7
Preset 0 dB
State Saved Saved in instrument state
Min 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.
Max 327.6 dB
Initial S/W Revision A.13.00
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
AMPTD Y Scale
740 EMI Receiver Mode Reference
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