User manual
Measurements
R&S
®
RTO
154User Manual 1316.0827.02 ─ 06
Signal level mode
In automatic reference level mode, the setting defines the high and low signal levels from
which the reference levels are derived. The instrument analyzes the signal and its his-
togram to define the signal level.
"Auto select absolute probability" The most suitable signal levels for the selected measurement are
used.
"Peak probability" The signal levels with the highest probability values are used.
"Mean probability" The signal levels with mean probabilities are used.
"Absolute peak" The absolute peak signal levels are used.
"Upper absolute peak - Lower mean
probability"
The high signal level is the upper absolute peak, and the low signal
level is the level with the mean probability in the lower half of the
histogram.
"Upper mean probability - Lower abso-
lute peak"
The high signal level is the level with mean probability in the upper
half of the histogram, and the low signal level is the lower absolute
peak.
SCPI command:
REFLevel<m>:AUTO:MODE on page 530
Level definition
In manual reference level mode, the setting defines whether the reference is configured
using absolute or relative values.
SCPI command:
REFLevel<m>:LMODe on page 530
User level selection
In manual reference level mode, the setting defines whether the user-defined signal levels
or user-defined reference levels are used for the measurements.
"User signal
level"
The high and low signal levels are defined by the user.
"User refer-
ence level"
The reference levels are defined by the user.
SCPI command:
REFLevel<m>:USRLevel on page 529
Levels Tab
The settings in this tab configure reference and signal levels. . In automatic reference
level mode, the reference levels are always relative values. In manual reference level
mode, relative and absolute "Level definitions" are possible.
For a description of "Selection" settings, see "Selection Settings" on page 153.
Relative levels
The lower, middle and upper reference levels, defined as percentages of the high signal
level.
Available relative levels:
Automatic Measurements