Rohde & Schwarz R&S FSP Series, Operating Manual

Page: 419 / 796

Operating Manual 1164.4556.12 - 06 6.25
R&S FSP Remote Control – Description of Commands
CALCulate Subsystem
6.5.5 CALCulate:LIMit Subsystem
The CALCulate:LIMit subsystem consists of the limit lines and the corresponding limit checks. Limit lines
can be defined as upper or lower limit lines. The individual Y values of the limit lines correspond to the
values of the x-axis (CONTrol). The number of X and Y values must be identical.
In analyzer mode, 8 limit lines can be active or checked at the same time (marked by LIMIT1 to LIMIT8)
in screen A and/or screen B. The measurement windows is selected via CALCulate 1 (screen A) or 2
(screen B). The limit check can be switched on separately for each measurement screen and limit line.
WINDow1 corresponds to screen A, WINDow2 to screen B.
Each limit line can be assigned a name (max. 8 letters) under which the line is stored in the instrument.
An explanatory comment can also be given for each line (max. 40 characters).
The subsystem is divided into the description of the general limit commands, of the commands for ACP
limit settings (
“CALCulate:LIMit:ACPower Subsystem” on page 6.30 ), of the commands for defining the
x-axis ( “CALCulate:LIMit:CONTrol Subsystem” on page 6.37 ), and of the commands for defining the
lower and upper limit values ( “CALCulate:LIMit:LOWer Subsystem” on page 6.39 / “CALCulate:LIMit:
UPPer Subsystem” on page 6.42 ).
Example (analyzer mode):
Definition and use of a new limit line 5 for trace 2 in screen A and trace 1 in screen B with the following
features:
• upper limit line
• absolute x-axis in the frequency domain
• 5 ref. values: 126 MHz/-40 dB, 127 MHz/-40 dB, 128 MHz/-20 dB, 129 MHz/-40 dB, 130 MHz/-40 dB
• relative y-axis with unit dB
• absolute threshold value at -35 dBm
• no safety margin
Definition of the line (example for analyzer mode):
1. Defining the name:
CALC:LIM5:NAME 'TEST1'
2. Entering the comment:
CALC:LIM5:COMM 'Upper limit line'
3. Associated trace in screen A:
CALC1:LIM5:TRAC 2
4. Associated trace in screen B:
CALC2:LIM5:TRAC 1
5. Defining the x-axis range:
CALC:LIM5:CONT:DOM FREQ
6. Defining the x-axis scaling:
CALC:LIM5:CONT:MODE ABS
7. Defining the y-axis unit:
CALC:LIM5:UNIT DB
8. Defining the y-axis scaling:
CALC:LIM5:UPP:MODE REL
9. Defining the x-axis values:
CALC:LIM5:CONT 126MHZ, 127MHZ, 128MHZ, 129MHZ, 130MHZ
10.Defining the y values:
CALC:LIM5:UPP -40, -40, -30, -40, -40
11.Defining the y threshold value:
CALC:LIM5:UPP:THR -35DBM
The definition of the safety margin and shifting in X and/or Y direction can take place as from here (see
commands below).