R&S 1129.7246.03, Operating Manual

Page: 797 / 855

R&S ESU Remote Control – Programming Examples
More Complex Programming Examples
7.8 Operating Manual 1302.6163.12 - 03
7.3 More Complex Programming Examples
In this section, the more advanced programming examples are included:
• “Using Marker and Delta Marker” on page 7.8
• “Limit Lines and Limit Test” on page 7.13
• “Measuring the Channel and Adjacent Channel Power” on page 7.15
• “Occupied Bandwidth Measurement” on page 7.17
• “Time Domain Power Measurement” on page 7.18
• “Fast Power Measurement on Power Ramps” on page 7.19
• “Fast Level Measurement Using Frequency Lists” on page 7.24
• “Level Correction of Transducers (Definition of Transducer Factors)” on page 7.26
• “Measuring the Magnitude and Phase of a Signal (I/Q Data Acquisition)” on
page 7.27
• “Reading and Writing Files” on page 7.30
For basic programming examples, refer to section “Basic Programming Steps for the
VISA Interface” on page 7.2 and the Quick Start Guide, chapter 6.
7.3.1 Using Marker and Delta Marker
7.3.1.1 Measuring Spurious Emissions
In transmission measurements, it is often necessary to search a large frequency
range for unwanted spurious emissions.
This can be done by means of the R&S ESU's LIST PEAKS function, which finds up
to 50 peaks in a preselected frequency range and outputs them as a list. The search
range can be defined both in terms of frequency and level, and the number of peaks
to be found is selectable as well.
In the following example, the 10 highest peaks are to be found in a preselected fre-
quency range. Only signals >-60 dBm in a range ± 400 kHz about the center fre-
quency are of interest, so the search range is limited accordingly. The signals found
are output in the order of ascending frequency.
REM ************************************************************************
Public Sub SpuriousSearch()
powerlist$ = Space$(1000)
freqlist$ = Space$(1000)
countstr$ = Space$(30)
'--------- R&S ESU default setting --------------------------
CALL SetupInstrument
'Default setting
status = viWrite(analyzer, "INIT:CONT OFF", 13, retCnt)
'Single sweep
'--------- Definition of search range -----------------------
status = viWrite(analyzer, "CALC:MARK:X:SLIM:STAT ON", 24, retCnt)
status = viWrite(analyzer, "CALC:MARK:X:SLIM:LEFT 99.6MHz;RIGHt 100.4MHz", 44,
retCnt)