Rohde & Schwarz ESW Series, User Manual

Page: 150 / 759

Common Measurement Settings
R&S
®
ESW
150 User Manual 1177.6298.02 ─ 08
Note that the signal path through the YIG preselector is always orange. This is
because the YIG preselector is always used for measurements on frequencies greater
then 8
GHz. A bypass of the YIG preselector is not possible.
(For measurements up to 8 GHz, you can use the optional preselector, see "Preselec-
tor Filter Settings" on page 150)
Functions of the "Preselector" dialog box described elsewhere:
●
"Input Selection" on page 122
●
"Input Coupling" on page 148
●
"Attenuation" on page 121
●
"Preamplifier" on page 121
●
"Pulse Limiter" on page 149
Preselector State .........................................................................................................150
Preselector Filter Settings ........................................................................................... 150
Preselector State
Turns the preselector on and off.
When you turn on the preselector, you can configure the characteristics of the prese-
lector and add the preamplifier into the signal path.
For more information, see Preselector Filter Settings .
When you turn off the preselector, the signal bypasses the preselector and the pream-
plifier, and is fed into the input mixer directly.
You can still use the optional low noise preamplifier, however.
Note that in the receiver application, the preselector is always turned on.
Remote command:
INPut<ip>:PRESelection[:STATe]
on page 487
Preselector Filter Settings
Selects the filter of the preselector.
Most preselector filters are applied automatically during the measurement. However,
you can control the following preselector filter characteristics. In addition, you can use
several notch filters to suppress signals from the corresponding frequency range com-
pletely.
●
150 kHz to 30 MHz ( preselector filter )
Filters signals below 150 kHz and above 30 MHz.
●
150 kHz to 2 MHz to 30 MHz ( preselector filter )
Preselection in the frequency range from 150 kHz to 30 MHz is split into two
stages.
–
During the first stage, the filter allows signals to pass from 150 kHz to 2 MHz.
– During the second stage, another filter allows signals to pass from 2 MHz to
30 MHz.
●
2.4 GHz to 2.5 GHz ( notch filter )
Notch filter that excludes the frequency range from 2.4 GHz to 2.5 GHz.
●
5.725 GHz to 5.875 GHz ( notch filter )
Notch filter that excludes the frequency range from 5.725 GHz to 5.875 GHz.
Data Input and Output