Common Measurement Settings
R&S
®
FSVA3000/ R&S
®
FSV3000
370
User Manual 1178.8520.02 ─ 01
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
FSV/A is adapted according to this value, it is recom-
mended 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 8.4.1.1, "Reference Level"
Remote command:
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel
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
FSV/A so the application shows correct power results. All displayed power level
results are shifted by this value.
The setting range is ±200 dB in 0.01 dB steps.
Note, however, that the
internal
reference level (used to adjust the hardware settings to
the expected signal) ignores any "Reference Level Offset" . Thus, it is important to
keep in mind the actual power level the R&S
FSV/A must handle. Do not rely on the
displayed reference level (internal reference level = displayed reference level - offset).
For details, see
Remote command:
DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel:OFFSet
Unit ← Reference Level
The R&S
FSV/A measures the signal voltage at the RF input.
In the default state, the level is displayed at a power level of 1
mW (=
dBm). Via the
known input impedance (50 Ω or 75 Ω, see
on page 313), conversion to
other units is possible.
The following units are available and directly convertible:
●
dBm
●
dBmV
●
dBμV
●
dBμA
●
dBpW
●
Volt
●
Ampere
●
Watt
Amplitude and Vertical Axis Configuration
