Rohde & Schwarz EVSG-B1, Руководство пользователя

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Numeric Measurement Modes
R&S
®
EVSG1000
116 User Manual 1178.6227.02 ─ 06
4.3.3.3 Ampt
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The following settings define the amplification for the input signal.
RF Att .......................................................................................................................... 116
RF Mode ......................................................................................................................116
Transducer Correction .................................................................................................117
RF Att
Determines how the attenuation of the RF signal is defined. The attenuation should be
adjusted such that the measured power level remains in the valid level range (indicated
by the green area of the bargraph, see
Figure 4-4 ). Note that the valid level range
depends on the selected measurement mode.
"Manual" The RF attenuation mode is specified manually (see "RF Mode"
on page 81).
"Auto" The RF attenuation mode is selected automatically.
The signal attenuation is selected automatically according to the sig-
nal strength.
This mode works best with clean signals. In difficult receiving condi-
tions, the "Low Noise", "Normal" or "Low Distortion" modes can be
more stable.
When monitoring signals with mostly constant signal levels, it is also
recommended that you use the "Low Noise", "Normal" or "Low Distor-
tion" mode.
Remote command:
SETATTMODE
on page 246
SCOPE_ATTMODE
on page 368
FFT_ATTMODE
on page 360
IFSPECT_ATTMODE
on page 356
RF Mode
Defines the RF attenuation mode to be used.
"Low Noise" 15 dB pre-amplification
Provides a high sensitivity. Suitable when scanning the area for dis-
tant signals.
"Norm" 0 dB
Provides a normal sensitivity.
"Low Dist" 15 dB attenuation
Provides a low sensitivity. Suitable when analyzing a nearby signal, to
avoid overload due to high-level signals.
Remote command:
SETATTMODE
on page 246
FSCAN_ATTMODE
on page 351
SCOPE_ATTMODE
on page 368
FFT_ATTMODE
on page 360
VOR Mode (Option R&S EVSG-K2)