Rohde & Schwarz EVSF1000, User Manual

Page: 100 / 295

Graphic Measurement Modes
R&S
®
EVSF1000
100 User Manual 1178.6410.02 ─ 05
RBW
Defines the resolution bandwidth (RBW) of the spectrum. The resolution bandwidth
defines the minimum frequency separation at which the individual components of a
spectrum can be distinguished. Small values result in high precision, as the distance
between two distinguishable frequencies is small. Higher values decrease the preci-
sion, but increase measurement speed.
The RBW can be determined automatically by the R&S EVSF1000, or manually.
AUTO mode The RBW is determined automatically according to the sweep time
and frequency range.
Manual mode Select a predefined fixed value manually.
Remote command:
IFSPECT_RES_BW
on page 254
7.2.3 Configuring the Amplitude (Y-Axis)
Access VNC : [w]
The amplitude settings configure the y-axis of the spectrum.
Ref Level ..................................................................................................................... 100
Y-Range ...................................................................................................................... 100
RF Att .......................................................................................................................... 100
RF Mode ..................................................................................................................... 101
Transducer Correction .................................................................................................101
Ref Level
The reference level determines the maximum power level displayed in the spectrum.
The reference level should be set as close as possible to the highest expected power
level to avoid overload at the RF input or signal clipping.
Remote command:
IFSPECT_REFLEVEL
on page 254
Y-Range
Determines the displayed power level range on the y-axis of the spectrum. The range
starts at the specified
Ref Level at the top of the diagram.
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 6.1.3.1, "RF Level and Frequency Dis-
play" , on page 38). Note that the valid level range depends on the selected measure-
ment mode.
"Manual" The RF attenuation mode is specified manually (see "RF Mode"
on page 53).
IF Spectrum Mode (Option R&S EVSG-K10)