Rohde & Schwarz FPL1000 Series, User Manual

Page: 385 / 899

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
385 User Manual 1178.3370.02 ─ 03
Reference Level ......................................................................................................... 385
└ Shifting the Display ( Offset ) ........................................................................ 385
└ Unit ...............................................................................................................386
└ Setting the Reference Level Automatically ( Auto Level ) .............................386
Attenuation Mode / Value ...........................................................................................386
Impedance ................................................................................................................. 387
Preamplifier ................................................................................................................ 387
Reference Level
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 FPL is adapted according to this value, it is recommen-
ded 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 382.
Remote command:
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel
on page 658
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.
Define an offset if the signal is attenuated or amplified before it is fed into the
R&S
FPL1000 so the application shows correct power results. All displayed power
level results are shifted by this value.
Amplitude and Vertical Axis Configuration