Rohde & Schwarz FPC Series, User Manual

Page: 145 / 419

The Receiver Application
R&S
®
FPC
142 User Manual 1178.4130.02 ─ 07
15.3 Amplitude Configuration
Access : "Ampt"
Access : "Setup" > "Config Overview" > "Amplitude" (selected settings)
Access : "Setup" > "Config Overview" > "Input" (selected settings)
Remote commands to configure the amplitude:
●
Chapter 19.13.3, "Amplitude" , on page 299
The following amplitude settings available in the receiver application are the same as
in the spectrum application.
●
"Reference Level": Chapter 14.4.1, "Reference Level" , on page 99
●
"Range / Ref Position" > "Auto Range": Chapter 14.4.3, "Scale of the Y-Axis" ,
on page 103
●
"Range / Ref Position" > "Range <x> dB": Chapter 14.4.3, "Scale of the Y-Axis" ,
on page 103
●
"Range / Ref Position" > "Linear 0 - 100%": Chapter 14.4.3, "Scale of the Y-Axis" ,
on page 103
●
"Range / Ref Position" > "Ref Position": "Defining the position of the reference
level" on page 100
●
"Range / Ref Position" > "Reference Offset": "Defining a reference offset"
on page 100
●
"Unit": "Selecting the display unit" on page 103
●
"Preamplifier": "Preamplifier" on page 103
●
"Attenuator": "RF attenuator" on page 101
●
"Impedance": "Selecting the input impedance" on page 98
●
"Transducer": Chapter 14.4.4, "Transducers" , on page 104
Defining the bargraph scale
The scale of the bargraph depends on the reference level and the level range.
The reference level is the maximum power level that the bargraph displays. You should
set the reference level in a way that the signal level does not exceed the reference
level. It should also be high enough so that the signal does not disappear in the inher-
ent noise.
1. Press the "Ampt" key to open the amplitude menu.
2. Select the "Reference Level" menu item.
3. Define the reference level that best fits the measurement.
If you measure unknown signals, define a high reference level in combination with
a high attenuation to avoid an input overload.
In the default state, the reference level corresponds to the level at the right of the
bargraph. A triangle in the bargraph scale indicates the position of the reference
level.
If necessary, you can move the reference position to another position on the scale.
Amplitude Configuration