Rohde & Schwarz EVSG-B1, Руководство пользователя

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Numeric Measurement Modes
R&S
®
EVSG1000
136 User Manual 1178.6227.02 ─ 06
Step Size
Defines the frequency step size for the rotary knob when setting the frequency.
The default step size for NDB mode is 1.0 kHz.
Remote command:
NDB_DEFAULT_FREQSTEP
on page 346
4.5.3.3 Amplitude
Access : [AMPT]
Access VNC : [w]
The following settings define the amplification for the input signal.
RF Att .......................................................................................................................... 136
RF Mode ..................................................................................................................... 136
LF Imp. ........................................................................................................................ 137
Transducer Correction .................................................................................................137
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
Chapter 4.5.2.1, "RF Level, Frequency and IF
Spectrum Display" , on page 129). 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
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.
Non-Directional Beacon Mode (Option R&S EVSG1-K7)