Rohde & Schwarz EVSG-B1, Руководство пользователя

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Numeric Measurement Modes
R&S
®
EVSG1000
115 User Manual 1178.6227.02 ─ 06
Freq Offset
Defines a fixed frequency offset from the carrier.
Remote command:
VOR_DEMFREQS_OFFSET
on page 315
4.3.3.2 Channel Frequency Configuration (CH FREQ)
Access : [CH FREQ]
Access VNC : [q]
The channel frequency determines the nominal frequency at which the measurement is
performed. For some avionics standards, the channels are associated with specific fre-
quencies. (See
Chapter A, "ILS Channel Frequency List" , on page 393 and Chapter B,
"VOR Channel Frequency List" , on page 395.)
CH ............................................................................................................................... 115
Freq ............................................................................................................................. 115
Step Size ..................................................................................................................... 115
CH
Sets the receiver frequency channel on the active receiver board according to the
ICAO frequency list.
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
VOR Mode (Option R&S EVSG-K2)