Rohde & Schwarz EVSG-B1, Руководство пользователя

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Numeric Measurement Modes
R&S
®
EVSG1000
80 User Manual 1178.6227.02 ─ 06
Remote command:
RFCH
on page 245
Freq
Sets the nominal frequency for the measurement. By default, this frequency is also
assumed to be the center frequency for spectrum displays, unless an offset is defined.
For measurements on two frequencies, the frequencies are defined as offsets to this
nominal frequency.
Remote command:
RF
on page 245
Step Size
Defines the frequency step size for the rotary knob when setting the frequency.
In many avionics signals, channels are assigned to frequencies with a fixed offset. By
setting the step size of the rotary knob to the fixed offset, you can easily scroll through
the signal's channel frequencies using the rotary knob. Thus, for example, you can
analyze the measurement results for one channel after the other simply by changing
the selected channel frequency with the rotary knob.
The default step size for ILS/VOR mode is 50 kHz.
Remote command:
ILS mode:
LLZ_DEFAULT_FREQSTEP
on page 278
GS_DEFAULT_FREQSTEP
on page 287
VOR mode:
VOR_DEFAULT_FREQSTEP
on page 314
4.1.4.3 Ampt
Access : [AMPT]
Access VNC : [w]
The following settings define the amplification for the input signal.
RF Att ............................................................................................................................ 80
RF Mode ....................................................................................................................... 81
Transducer Correction ...................................................................................................81
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).
ILS Localizer and ILS Glidepath (GP) Modes