User manual

Acquisition and Setup
R&S
®
RTO
13User Manual 1316.0827.02 ─ 06
2 Acquisition and Setup
This chapter describes the horizontal and vertical settings as well as the acquisition and
probe setup.
2.1 Basics
This chapter provides background information on the essential settings in the vertical and
horizontal systems, on acquisition setup and probing.
2.1.1 Vertical System
The controls and parameters of the vertical system are used to scale and position the
waveform vertically.
2.1.1.1 Input coupling
The input coupling influences the signal path between input connector and the following
internal signal stage. The coupling can be set to DC, AC, or ground.
● DC coupling shows all of an input signal. DC coupling is available with 1 MΩ input
impedance to connect standard passive probes. DC coupling is the default for 50 Ω
input impedance.
●
AC coupling is useful if the DC component of a signal is of no interest. AC coupling
blocks the DC component of the signal so that the waveform is centered around zero
volts.
●
Ground coupling disconnects the input signal from the vertical system to see the
ground level (zero volts) on the screen. Ground coupling is useful for reference pur-
poses.
2.1.1.2 Vertical scale and position
Vertical scale and vertical position directly affect the resolution of the waveform ampli-
tude. The vertical scale corresponds to the ADC input range. To get the full resolution of
the ADC, waveforms should cover most of the height of the diagram.
Basics