Ronde & Schwarz 1304.0004.03, Руководство пользователя

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
311 User Manual 1178.3370.02 ─ 09
Reference Level .......................................................................................................... 311
└ Shifting the Display (Offset) .......................................................................... 311
└ Unit ................................................................................................................312
└ Setting the Reference Level Automatically (Auto Level) ...............................312
Attenuation Mode / Value ............................................................................................ 313
Impedance .................................................................................................................. 313
Preamplifier ................................................................................................................. 313
Reference Level
Defines the expected maximum input signal level. Signal levels above this value may
not be measured correctly, which is indicated by the "IF Overload" status display
("OVLD" for analog baseband or digital baseband input).
Defines the expected maximum reference level. Signal levels above this value may not
be measured correctly. This is indicated by an "IF Overload" status display.
The reference level can also be used to scale power diagrams; the reference level is
then used as the maximum on the y-axis.
Since the hardware of the R&S FPL1000 is adapted according to this value, it is rec-
ommended that you set the reference level close above the expected maximum signal
level. Thus you ensure an optimum measurement (no compression, good signal-to-
noise ratio).
For details, see Chapter 7.5.1.1, "Reference Level" , on page 308.
Remote command:
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel
on page 777
Shifting the Display (Offset) ← Reference Level
Defines an arithmetic level offset. This offset is added to the measured level. In some
result displays, the scaling of the y-axis is changed accordingly.
Amplitude and Vertical Axis Configuration