MSRA configuration
R&S
®
FSWP-B1
38
User Manual 1177.5862.02 ─ 09
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Consider an external attenuator or preamplifier (using the "Offset").
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Optimize the SNR of the measurement for low signal levels by configuring the
as high as possible without introducing compression, clipping or over-
load. Use early amplification by the preamplifier and a low attenuation.
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Optimize the SNR for high signal levels and ensure that the instrument hardware is
not damaged, using high attenuation and AC coupling (for DC input voltage).
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Adapt the reference impedance for power results when measuring in a 75-Ohm
system by connecting an external matching pad to the RF input.
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Reference Level
Defines the expected maximum reference level. Signal levels above this value are pos-
sibly not measured correctly. Signals above the reference level are indicated by an "IF
Overload" status display.
The reference level can also be used to scale power diagrams; the reference level is
then used for the calculation of the maximum on the y-axis.
Since the hardware of the R&S
FSWP 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 optimal measurement (no compression, good signal-to-
noise ratio).
Amplitude