Rohde&Schwarz R&S®VSE-K149 HRP UWB User Manual
R&S®VSE-K149
HRP UWB Measurement Application
User Manual
(;ÝQ?2)
1179331502
Version 03
This manual applies to the following software, version 2.20 and later:
●
R&S®VSE Enterprise Edition base software (1345.1105.06)
●
R&S®VSE Basic Edition base software (1345.1011.06)
The following firmware options are described:
●
R&S VSE-K149 (1345.1463.06)
●
R&S VSE-KT149 (1345.2082.02)
© 2022 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Muenchen, Germany
Phone: +49 89 41 29 - 0
Email: info@rohde-schwarz.com
Internet: www.rohde-schwarz.com
Subject to change – data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1179.3315.02 | Version 03 | R&S®VSE-K149
The following abbreviations are used throughout this manual: R&S®VSE is abbreviated as R&S VSE.
R&S®VSE-K149
1 Preface.................................................................................................... 7
1.1 About this manual.........................................................................................................7
1.2 Conventions used in the documentation....................................................................7
1.2.1 Typographical conventions..............................................................................................7
1.2.2 Conventions for procedure descriptions..........................................................................8
1.2.3 Notes on screenshots..................................................................................................... 8
2 Welcome to the HRP UWB application................................................ 9
2.1 Starting the HRP UWB application.............................................................................. 9
2.2 Understanding the display information.................................................................... 10
3 Measurements and result displays.................................................... 12
Contents
Contents
3.1 Evaluation methods for HRP UWB............................................................................ 12
4 Configuration........................................................................................22
4.1 Configuration overview.............................................................................................. 22
4.2 Input and frontend settings........................................................................................23
4.2.1 Input source settings..................................................................................................... 23
4.2.1.1 Radio frequency input................................................................................................... 23
4.2.1.2 I/Q file input................................................................................................................... 29
4.2.2 Frequency settings........................................................................................................31
4.2.3 Amplitude settings.........................................................................................................32
4.2.4 Scaling.......................................................................................................................... 36
4.3 Trigger settings........................................................................................................... 37
4.4 Data acquisition.......................................................................................................... 41
4.5 Burst/Sync................................................................................................................... 43
4.6 Demodulation.............................................................................................................. 44
4.7 Evaluation range......................................................................................................... 46
4.7.1 Analysis.........................................................................................................................47
4.7.2 Group Config.................................................................................................................48
4.8 Result configuration................................................................................................... 49
4.8.1 Result config................................................................................................................. 49
4.8.2 Result summary............................................................................................................ 50
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4.8.3 Packet insight................................................................................................................50
5 Analysis................................................................................................ 51
5.1 Configuring traces...................................................................................................... 51
5.1.1 Selecting the trace information......................................................................................51
5.1.2 Exporting traces............................................................................................................ 52
5.2 Using markers............................................................................................................. 54
5.2.1 Configuring markers......................................................................................................54
5.3 Evaluation modes....................................................................................................... 55
6 Remote commands for HRP UWB measurements............................56
6.1 Introduction................................................................................................................. 56
6.1.1 Conventions used in descriptions................................................................................. 57
6.1.2 Long and short form...................................................................................................... 57
Contents
6.1.3 Numeric suffixes............................................................................................................58
6.1.4 Optional keywords.........................................................................................................58
6.1.5 Alternative keywords..................................................................................................... 58
6.1.6 SCPI parameters...........................................................................................................59
6.1.6.1 Numeric values............................................................................................................. 59
6.1.6.2 Boolean......................................................................................................................... 60
6.1.6.3 Character data.............................................................................................................. 60
6.1.6.4 Character strings...........................................................................................................61
6.1.6.5 Block data..................................................................................................................... 61
6.2 Common suffixes........................................................................................................ 61
6.3 Activating HRP UWB measurements........................................................................ 61
6.4 Configuring the result display................................................................................... 62
6.4.1 Restoring the default configuration (Preset)..................................................................62
6.4.2 Layout configuration in R&S VSE-K149........................................................................62
6.5 Retrieving results........................................................................................................62
6.5.1 General......................................................................................................................... 62
6.5.2 Magnitude capture........................................................................................................ 63
6.5.3 Packet insights.............................................................................................................. 65
6.5.4 Result summary............................................................................................................ 66
6.6 Configuring the measurement................................................................................... 69
6.6.1 Input/output settings......................................................................................................69
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6.6.1.1 Configuring data input................................................................................................... 69
6.6.2 Frontend configuration................................................................................................ 106
6.6.2.1 Frequency................................................................................................................... 106
6.6.2.2 Amplitude settings.......................................................................................................108
6.6.2.3 Scaling.........................................................................................................................110
6.6.2.4 Configuring the attenuation......................................................................................... 113
6.6.3 Triggering measurements............................................................................................115
6.6.3.1 Configuring the triggering conditions...........................................................................115
6.6.3.2 Configuring the trigger output......................................................................................121
Contents
RF input.........................................................................................................................69
Using external mixers....................................................................................................81
Remote commands for external frontend control.......................................................... 89
Working with power sensors......................................................................................... 98
6.6.4 Configuring data aquisition..........................................................................................123
6.6.5 Configuring burst/sync................................................................................................ 125
6.6.6 Configuring demodulation........................................................................................... 127
6.6.7 Configuring evaluation range...................................................................................... 129
6.6.8 Configuring results...................................................................................................... 131
6.7 Configuring standard traces.................................................................................... 133
6.8 Working with markers...............................................................................................136
6.8.1 Using markers............................................................................................................. 136
6.8.2 Using delta markers.................................................................................................... 138
6.8.3 Configuring markers....................................................................................................140
6.8.4 Positioning markers.....................................................................................................141
6.8.5 Positioning delta markers............................................................................................143
List of Remote Commands (HRP UWB)........................................... 146
Index....................................................................................................154
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Contents
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1 Preface
1.1 About this manual
Preface
Conventions used in the documentation
This R&S VSE HRP UWB User Manual provides all the information specific to the
application. All general software functions and settings common to all applications
and operating modes are described in the R&S VSE Base Software User Manual.
The main focus in this manual is on the measurement results and the tasks required to
obtain them. The following topics are included:
●
Welcome to the R&S VSE HRP UWB application
Introduction to and getting familiar with the application
●
Measurements and Result Displays
Details on supported measurements and their result types
●
Configuration + Analysis
A concise description of all functions and settings available to configure measurements and analyze results with their corresponding remote control command
●
How to Perform Measurements in the R&S VSE HRP UWB application
The basic procedure to perform each measurement and step-by-step instructions
for more complex tasks or alternative methods
●
Remote Commands for R&S VSE HRP UWB application Measurements
Remote commands required to configure and perform R&S VSE HRP UWB application measurements in a remote environment, sorted by tasks
(Commands required to set up the environment or to perform common tasks in the
software are provided in the R&S VSE Base Software User Manual)
Programming examples demonstrate the use of many commands and can usually
be executed directly for test purposes
●
List of remote commands
Alphabetical list of all remote commands described in the manual
●
Index
1.2 Conventions used in the documentation
1.2.1 Typographical conventions
The following text markers are used throughout this documentation:
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Preface
Conventions used in the documentation
Convention Description
"Graphical user interface elements"
[Keys] Key and knob names are enclosed by square brackets.
Filenames, commands,
program code
Input Input to be entered by the user is displayed in italics.
Links Links that you can click are displayed in blue font.
"References" References to other parts of the documentation are enclosed by quota-
All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.
Filenames, commands, coding samples and screen output are distinguished by their font.
tion marks.
1.2.2 Conventions for procedure descriptions
When operating the instrument, several alternative methods may be available to perform the same task. In this case, the procedure using the touchscreen is described.
Any elements that can be activated by touching can also be clicked using an additionally connected mouse. The alternative procedure using the keys on the instrument or
the on-screen keyboard is only described if it deviates from the standard operating procedures.
The term "select" may refer to any of the described methods, i.e. using a finger on the
touchscreen, a mouse pointer in the display, or a key on the instrument or on a keyboard.
1.2.3 Notes on screenshots
When describing the functions of the product, we use sample screenshots. These
screenshots are meant to illustrate as many as possible of the provided functions and
possible interdependencies between parameters. The shown values may not represent
realistic usage scenarios.
The screenshots usually show a fully equipped product, that is: with all options installed. Thus, some functions shown in the screenshots may not be available in your particular product configuration.
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2 Welcome to the HRP UWB application
Welcome to the HRP UWB application
Starting the HRP UWB application
The R&S VSE-K149 is a firmware application that adds functionality to perform High
Rate Pulse Repetition Frequency (HRP) Ultrawideband (UWB) measurements with the
R&S VSE.
The R&S VSE HRP UWB application features:
●
Analysis of High Rate Pulse Repetition Frequency (HRP) Ultrawideband (UWB)
signals
●
Time of flight (TOF) measurements
●
Spectrum analysis
●
Pulse mask analysis
●
In Depth packet insights
This user manual contains a description of the functionality that the application provides, including remote control operation.
Functions that are not discussed in this manual are the same as in the spectrum application and are described in the R&S VSE User Manual. The latest version is available
for download at the product homepage.
2.1 Starting the HRP UWB application
Ultrawideband measurements require a separate application on the R&S VSE. It is
activated by creating a new measurement channel in HRP UWB mode.
To activate the HRP UWB application
1.
Select the "Add Channel" function in the Sequence tool window.
A dialog box opens that contains all operating modes and applications currently
available in your R&S VSE.
2. Select the "HRP UWB" item.
The R&S VSE opens a new measurement channel for the R&S VSE HRP UWB
application.
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2.2 Understanding the display information
Welcome to the HRP UWB application
Understanding the display information
The following figure shows a measurement diagram during analyzer operation. All different information areas are labeled. They are explained in more detail in the following
sections.
1 2 3 4
1 = Channel bar for firmware and measurement settings
2 = Window title bar with diagram-specific (trace) information
3 = Diagram area
4 = Diagram footer with diagram-specific information
The color of the bars below the bursts is defined as follows:
●
Blue: Selected packet
●
Green: Successful sync of all sections
●
Red: Detected burst, but no successful demodulation of SYNC section
●
Yellow: Successful demodulaton of just SYNC section
Channel bar information
In the R&S VSE HRP UWB application, the R&S VSE shows the following settings:
Table 2-1: Information displayed in the channel bar in the HRP UWB application
Ref Level Reference level
Att RF attenuation
Freq Center frequency for the RF signal
Capture Time Measurement time (data acquisition time)
Rec Length Record length
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Welcome to the HRP UWB application
Understanding the display information
SRate Sample rate
ABW Analysis Bandwidth
Channel Measurement Channel
Group Selected group of packets
Default configuration for all windows, set in the "Analysis" dialog.
Sel Packet Selected packet
Default configuration for all windows, set in the "Analysis" dialog.
In addition, the channel bar also displays information on instrument settings that affect
the measurement results even though this is not immediately apparent from the display
of the measured values (e.g. transducer or trigger settings). This information is displayed only when applicable for the current measurement. For details see the
R&S VSE Base Software User Manual.
Window title bar information
For each diagram, the header provides the following information:
1
Figure 2-1: Window title bar information in the R&S VSE HRP UWB application
1 = Window number
2 = Window type
3 = Trace color
4 = Trace number
5 = Trace mode
2
3
5
4
If a result display shows a different group or a different selected packet, this information is displayed right below the window title:
The group and selected packet can either be set in the analysis dialog for all displays
or in the result config dialog for individual displays.
Status bar information
The software status, errors and warnings and any irregularities in the software are indicated in the status bar at the bottom of the R&S VSE window.
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3 Measurements and result displays
3.1 Evaluation methods for HRP UWB
Measurements and result displays
Evaluation methods for HRP UWB
The data that was measured by the R&S VSE can be evaluated using various different
methods.
All results are determined from the I/Q data set captured for the measurement.
Storing Results
The results of the HRP UWB measurement can be stored to a file in ASCII format.
● Evaluation methods for HRP UWB......................................................................... 12
The following evaluation methods can be selected for HRP UWB measurements.
Chip Phase Jitter...........................................................................................................12
Chip Time Jitter.............................................................................................................13
Correlated Pulse........................................................................................................... 13
Magnitude Capture........................................................................................................14
Marker Table................................................................................................................. 14
Packet Insights..............................................................................................................14
Packet Spectrum...........................................................................................................16
Pulse............................................................................................................................. 16
Result Summary............................................................................................................17
Symbol Phase Jitter...................................................................................................... 20
Symbol Time Jitter.........................................................................................................21
Chip Phase Jitter
Displays a histogram of the phase jitter of chips in SYNC section of each packet.
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Measurements and result displays
Evaluation methods for HRP UWB
Remote command:
LAY:ADD? '1',RIGH,CJPH
Chip Time Jitter
Displays a histogram of the time jitter of chips in SYNC section of each packet.
Remote command:
LAY:ADD? '1',RIGH,CJT
Correlated Pulse
Displays the cross correlation of the measured UWB pulse of sync section and root
raised cosine (RRC) pulse defined in IEEE 802.15.4-2020.
Remote command:
LAY:ADD? '1',RIGH,XCOR
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Measurements and result displays
Evaluation methods for HRP UWB
Magnitude Capture
Displays the magnitude capture using a trace with "Positive Peak" detector. There are
different methods to configure packet detection. See Chapter 4.5, "Burst/Sync",
on page 43 for further details.
Remote command:
LAY:ADD? '1',RIGH,MCAP
Retrieving results see Chapter 6.5.2, "Magnitude capture", on page 63
Marker Table
Displays a table with the current marker values for the active markers.
This table is displayed automatically if configured accordingly.
Tip: To navigate within long marker tables, simply scroll through the entries with your
finger on the touchscreen.
Remote command:
LAY:ADD? '1',RIGH, MTAB
Packet Insights
Displays the values from the "Selected Packet" or the values of "All Packets": For all
packets in statistics, the values are “Identical” or “Mixed”. "Identical" means that the
packets have the same value (displayed in the Sel Packet column), whereas "Mixed"
indicates different values.
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Measurements and result displays
Evaluation methods for HRP UWB
Table 3-1: Displayed values
SYNC
Code Index Code index
Code Length Corresponding code length
Delta Length Delta length
Sync Length Number of analyzed symbols in SYNC section of the
SFD non-ERDEV: “short” / “long”
Data
Data Rate [Mb/s] Bit rate according to IEEE 802.15.4-2020 (Table
Chip Per Burst Non-HPRF: Chips Per Burst in line with IEEE
Hop Burst Non-HPRF: Hop Burst in line with IEEE
Length [Octets] Length of payload in octets including MAC FCS
packet including symbols in settling time
HRP-ERDEV BPRF: 0, 2
HRP-ERDEV HPRF: 1, 2, 3, 4
15-3) and IEEE 802.15.4z-2020 (Table 15-9a and
Table 15-10b)
802.15.4-2020 (Table 15-3)
802.15.4-2020 (Table 15-3)
octets
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Measurements and result displays
Evaluation methods for HRP UWB
Ranging Bit Ranging bit set or not
Reserved Bit Non-HPRF: Status of reserved bit
SECDEC SECDEC pass or fail
Constraint Length HPRF mode: CL3 or CL7
A0A1 HPRF mode: Values of A0 and A1 are shown
MAC FCS Verification result of MAC frame check sequence
(FCS)
Remote command:
LAY:ADD? '1',RIGH,PINS
Querying payload content: FETCh<n>:PACKet:DATA:PAYLoad? on page 65
Retrieving results see Chapter 6.5.3, "Packet insights", on page 65
Packet Spectrum
Displays the spectrum of the selected packet. Limit Lines are defined in Transmit
Power Spectral Density (IEEE 802.15.4-2020, Section 15.4.5). The limits are checked
only against the selected packet.
Remote command:
LAY:ADD? '1',RIGH,PSP
Pulse
Displays the pulse of the SYNC section of an UWB packet. Limit lines are set according to FIRA UWB PHY Technical Requirements v1.2, Section 5.2.5. The limits are
checked only against the selected packet.
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Measurements and result displays
Evaluation methods for HRP UWB
Remote command:
LAY:ADD? '1',RIGH,PULS
Result Summary
Displays various measurement results in numerical form, combined in one table.
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Measurements and result displays
Evaluation methods for HRP UWB
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Measurements and result displays
Evaluation methods for HRP UWB
Table 3-2: Displayed values
Frequency
Center Frequency Offset [Hz] Estimated frequency offset of the SYNC section.
Center Frequency Offset [ppm] Estimated frequency offset of the SYNC section rel-
Chip Clock Error [ppm] Estimated chip clock frequency error of the SYNC
Jitter
Symbol Time Jitter RMS [ps] RMS of the time jitter of symbols of the SYNC sec-
Chip Time Jitter RMS [ps] RMS of the time jitter of chips of the SYNC section
Correlated Pulse Cross correlation of measured UWB pulse and root
Pulse NMSE [dB] NMSE of the correlated pulse
Main Lobe Peak [%] Amplitude of the main lobe peak
Main Lobe Width [ns] Main lobe width of pulse at 80%
Main Lobe Min Width [ns] Required minimum width of main lobe according to
>0 => DUT has higher frequency than analyzer
ative to carrier frequency.
>0 => DUT has higher CLK frequency than analyzer
section.
tion
raised cosine (RRC) pulse defined in IEEE
802.15.4-2020
IEEE 802.15.4-2020 (Table 15-12)
Main Lobe Width Passed Passed if main lobe width is above minimum main
lobe width
Side Lobe Peak Location [ns] Location of side lobe peak relative to main lobe
peak
Side Lobe Peak [%] Amplitude of side lobe peak
Side Lobe Peak Passed Passed if side lobe peak is below 30%
Pulse FIRA UWB PHY Technical Requirements v1.2 RC2
Pulse Mask Passed if time domain pulse meets mask
Pulse Rise Monotonic Passed if time domain pulse rises monotonically
Pulse Rise Time [ns] Rise time of pulse
Pulse Rise Time Passed Pass if pulse rise time is smaller than 2.5ns
EVM FIRA UWB PHY Technical Requirements v1.2 RC2
SHR NRMSE [%] NRMSE of SHR section (omitting first µs)
PHR NRMSE [%] NRMSE of PHR section
PSDU NRMSE [%] NRMSE of PSDU section
STS NRMSE [%] NRMSE of STS section
PHR Pulse Level [dB] Pulse level of PHR section relative to SHR section
PSDU Pulse Level [dB] Pulse level of PSDU section relative to SHR section
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Measurements and result displays
Evaluation methods for HRP UWB
STS Pulse Level [dB] Pulse level of STS section relative to SHR section
Power
SHR Mean [dBm] Mean Power of SHR section
SHR Peak [dBm] Peak Power of SHR section
PSDU Mean [dBm] Mean Power of PSDU section
PSDU Peak [dBm] Peak Power of PSDU section
STS mean [dBm] Mean power of STS section
STS peak [dBm] Peak power of STS section
Spectrum Transmit Power Spectral Density defined in IEEE
Max Spectral Power [dBm / MHz] Maximum Spectral Power Density
Spectrum Mask Passed Passed if transmit PSD mask limits are met
Ranging
RMarker [ps] Ranging marker position defined in IEEE
Ranging marker in STS 1-4 [ps] Ranging marker position within STS in line with
802.15.4-2020, Section 15.4.5
802.15.4-2020 and IEEE 802.15.4z-2020, relative to
capture buffer
To estimate the time difference between several
captured packets, the RMarker can be evaluated.
IEEE 802.15.4z-2020, relative to capture buffer
For each result type, several values are displayed.
●
Sel packet
Values measured for the selected packet.
●
Average
Average value measured over all packets.
●
Min
Lowest value measured over all packets.
●
Max
Highest value measured over all packets.
Remote command:
LAY:ADD? '1',RIGH,RSUM
Retrieving results see Chapter 6.5.4, "Result summary", on page 66
Symbol Phase Jitter
Displays a histogram of the phase jitter of symbols in SYNC section of each packet.
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Measurements and result displays
Evaluation methods for HRP UWB
Remote command:
LAY:ADD? '1',RIGH,SJPH
Symbol Time Jitter
Displays a histogram of the time jitter of symbols in SYNC section of each packet.
Remote command:
LAY:ADD? '1',RIGH,SJT
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4 Configuration
4.1 Configuration overview
Configuration
Configuration overview
● Configuration overview............................................................................................22
● Input and frontend settings......................................................................................23
● Trigger settings....................................................................................................... 37
● Data acquisition.......................................................................................................41
● Burst/Sync...............................................................................................................43
● Demodulation..........................................................................................................44
● Evaluation range..................................................................................................... 46
● Result configuration................................................................................................ 49
Throughout the measurement channel configuration, an overview of the most important
currently defined settings is provided in the "Overview".
The "Overview" is displayed when you select the "Overview" icon, which is available in
the Meas Setup menu.
In addition to the main measurement settings, the "Overview" provides quick access to
the main settings dialog boxes. The individual configuration steps are displayed in the
order of the data flow. Thus, you can easily configure an entire measurement channel
from input over processing to output and analysis by stepping through the dialog boxes
as indicated in the "Overview".
To configure settings
► Select any button in the "Overview" to open the corresponding dialog box.
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4.2 Input and frontend settings
Configuration
Input and frontend settings
Preset Channel
Select the "Preset Channel" button in the lower left-hand corner of the "Overview" to
restore all measurement settings in the current channel to their default values.
Remote command:
SYSTem:PRESet:CHANnel[:EXEC] on page 62
Access: "Overview" > "Input/Frontend"
The R&S VSE can evaluate signals from different input sources and provide various
types of output (such as trigger signals).
The frequency and amplitude settings represent the "frontend" of the measurement
setup.
● Input source settings...............................................................................................23
● Frequency settings..................................................................................................31
● Amplitude settings...................................................................................................32
● Scaling.................................................................................................................... 36
4.2.1 Input source settings
Access: "Overview" > "Input/Frontend" > "Input Source"
Or: "Input & Output" > "Input Source"
The R&S VSE can control the input sources of the connected instruments.
● Radio frequency input............................................................................................. 23
● I/Q file input.............................................................................................................29
4.2.1.1 Radio frequency input
Or: "Input & Output" > "Input Source" > "Radio Frequency"
The default input source for the connected instrument is "Radio Frequency". Depending on the connected instrument, different input parameters are available.
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Configuration
Input and frontend settings
Figure 4-1: RF input source settings for an R&S FSW with B2000 option
If the Frequency Response Correction option (R&S VSE-K544) is installed, the R&S
VSE HRP UWB application also supports frequency response correction using Touchstone (.snp) files or .fres files.
Input Type (Instrument / File)........................................................................................24
Instrument..................................................................................................................... 25
Input 1 / Input 2............................................................................................................. 25
Input Coupling ..............................................................................................................25
Impedance ................................................................................................................... 25
Direct Path ................................................................................................................... 25
High Pass Filter 1 to 3 GHz ..........................................................................................26
YIG-Preselector ............................................................................................................26
Capture Mode............................................................................................................... 26
B2000 State.................................................................................................................. 27
Oscilloscope Sample Rate............................................................................................27
Oscilloscope Splitter Mode............................................................................................28
Oscilloscope IP Address............................................................................................... 28
Preselector State...........................................................................................................28
Preselector Mode..........................................................................................................28
10 dB Minimum Attenuation..........................................................................................29
Input Type (Instrument / File)
Selects an instrument or a file as the type of input provided to the channel.
Note: External mixers are only available for input from a connected instrument.
Note: If the R&S VSE software is installed directly on an instrument, or integrated in
Cadence®AWR®VSS, some restrictions apply on the available input type.
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Configuration
Input and frontend settings
Remote command:
INSTrument:BLOCk:CHANnel[:SETTings]:SOURce<si> on page 77
INPut<ip>:SELect on page 76
Instrument
Specifies a configured instrument to be used for input.
Input 1 / Input 2
For instruments with two input connectors, you must define which input source is used
for each measurement channel.
Note that you cannot use both RF inputs simultaneously.
"Input 1"
R&S FSW85: 1.00 mm RF input connector for frequencies up to
85 GHz (90 GHz with option R&S FSW-B90G)
"Input2"
Remote command:
INPut<ip>:TYPE on page 76
Input Coupling
The RF input of the R&S VSE can be coupled by alternating current (AC) or direct current (DC).
The RF input of the connected instrument can be coupled by alternating current (AC)
or direct current (DC).
For an active external frontend, input coupling is always DC.
AC coupling blocks any DC voltage from the input signal. AC coupling is activated by
default to prevent damage to the instrument. Very low frequencies in the input signal
can be distorted.
However, some specifications require DC coupling. In this case, you must protect the
instrument from damaging DC input voltages manually. For details, refer to the data
sheet.
Remote command:
INPut<ip>:COUPling<ant> on page 71
Impedance
For some measurements, the reference impedance for the measured levels of the connected instrument can be set to 50 Ω or 75 Ω.
R&S FSW85: 1.85 mm RF input connector for frequencies up to
67 GHz
Select 75 Ω if the 50 Ω input impedance is transformed to a higher impedance using a
75 Ω adapter of the RAZ type. (That corresponds to 25Ω in series to the input impedance of the instrument.) The correction value in this case is 1.76 dB = 10 log (75Ω/
50Ω).
Remote command:
INPut<ip>:IMPedance<ant> on page 73
Direct Path
Enables or disables the use of the direct path for small frequencies.
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Configuration
Input and frontend settings
In spectrum analyzers, passive analog mixers are used for the first conversion of the
input signal. In such mixers, the LO signal is coupled into the IF path due to its limited
isolation. The coupled LO signal becomes visible at the RF frequency 0 Hz. This effect
is referred to as LO feedthrough.
To avoid the LO feedthrough the spectrum analyzer provides an alternative signal path
to the A/D converter, referred to as the direct path. By default, the direct path is
selected automatically for RF frequencies close to zero. However, this behavior can be
disabled. If "Direct Path" is set to "Off" , the spectrum analyzer always uses the analog
mixer path.
For an active external frontend, the direct path is always used automatically for frequencies close to zero.
"Auto"
"Off"
Remote command:
INPut<ip>:DPATh on page 71
(Default) The direct path is used automatically for frequencies close
to zero.
The analog mixer path is always used.
High Pass Filter 1 to 3 GHz
Activates an additional internal highpass filter for RF input signals from 1 GHz to
3 GHz. This filter is used to remove the harmonics of the analyzer to measure the harmonics for a DUT, for example.
For some connected instruments, this function requires an additional hardware option
on the instrument.
Note: For RF input signals outside the specified range, the high-pass filter has no
effect. For signals with a frequency of approximately 4 GHz upwards, the harmonics
are suppressed sufficiently by the YIG-preselector, if available.)
Remote command:
INPut<ip>:FILTer:HPASs[:STATe] on page 72
YIG-Preselector
Enables or disables the YIG-preselector.
This setting requires an additional option on the connected instrument.
Note: Note that the YIG-preselector is active only higher frequencies, depending on
the connected instrument. Therefore, switching the YIG-preselector on or off has no
effect if the frequency is below that value.
To use the optional 90 GHz frequency extension (R&S FSW-B90G), the YIG-preselector must be disabled.
To use the optional 54 GHz frequency extension (R&S FSV3-B54G), the YIG-preselector must be disabled.
Remote command:
INPut<ip>:FILTer:YIG[:STATe] on page 73
Capture Mode
Determines how data from an oscilloscope is input to the R&S VSE software.
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R&S®VSE-K149
Configuration
Input and frontend settings
This function is only available for a connected R&S oscilloscope with a firmware version 3.0.1.1 or higher (for other versions and instruments the input is always I/Q data).
"I/Q"
"Waveform"
"Auto"
Remote command:
INPut<ip>:RF:CAPMode on page 74
The measured waveform is converted to I/Q data directly on the R&S
oscilloscope (requires option K11), and input to the R&S VSE software as I/Q data.
For data imports with small bandwidths, importing data in this format
is quicker. However, the maximum record length is restricted by the
R&S oscilloscope. (Memory options on the R&S oscilloscope are not
available for I/Q data.)
The data is input in its original waveform format and converted to I/Q
data in the R&S VSE software. No additional options are required on
the R&S oscilloscope.
For data imports with large bandwidths, this format is more convenient as it allows for longer record lengths if appropriate memory
options are available on the R&S oscilloscope.
Uses "I/Q" mode when possible, and "Waveform" only when required
by the application (e.g. Pulse measurement, oscilloscope baseband
input).
B2000 State
Activates the optional 2 GHz bandwidth extension (R&S FSW-B2000).
Note: The R&S VSE software supports input from a connected R&S FSW with a
B2000 option installed. However, the R&S FSW interface to the oscilloscope must be
set up and aligned directly on the instrument before the R&S VSE software can start
analyzing the input.
The analysis bandwidth is defined in the data acquisition settings of the application as
usual. Note that the maximum bandwidth cannot be restricted manually as for other
bandwidth extension options.
Manual operation on the connected oscilloscope, or remote operation other than by the
R&S VSE, is not possible while the B2000 option is active.
Remote command:
SYSTem:COMMunicate:RDEVice:OSCilloscope[:STATe] on page 78
Oscilloscope Sample Rate
Determines the sample rate used by the connected oscilloscope.
This setting is only available if an R&S oscilloscope is used to obtain the input data,
either directly or via the R&S FSW.
"10
GHz"
Default for waveform Capture Mode (not available for I/Q Capture
Mode); provides maximum record length
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Configuration
Input and frontend settings
"20 GHz"
"40 GHz"
Remote command:
Input source R&S FSW via oscilloscope:
SYSTem:COMMunicate:RDEVice:OSCilloscope:SRATe on page 80
Input source oscilloscope waveform mode:
INPut<ip>:RF:CAPMode:WAVeform:SRATe on page 75
Input source oscilloscope I/Q mode:
INPut<ip>:RF:CAPMode:IQ:SRATe on page 75
Oscilloscope Splitter Mode
Activates the use of the power splitter inserted between the [IF 2 GHZ OUT] connector
of the R&S FSW and the [CH1] and [CH3] input connectors of the oscilloscope. Note
that this mode requires an additional alignment with the power splitter.
For details see the R&S FSW I/Q Analyzer and I/Q Input User Manual.
Achieves a higher decimation gain, but reduces the record length by
half.
Only available for R&S oscilloscope models that support a sample
rate of 20 GHz (see data sheet).
For R&S oscilloscopes with an analysis bandwidth of 4 GHz or larger,
a sample rate of 20 GHZ is always used in waveform Capture Mode
Provides a maximum sample rate.
Only available for I/Q Capture Mode, and only for R&S RTP13/RTP16
models that support a sample rate of 40 GHz (see data sheet)
Remote command:
SYSTem:COMMunicate:RDEVice:OSCilloscope:PSMode[:STATe] on page 79
Oscilloscope IP Address
When using the optional 2 GHz bandwidth extension (R&S FSW-B2000) with an R&S
FSW as the connected instrument, the entire measurement, as well as both instruments, are controlled by the R&S VSE software. Thus, the instruments must be connected via LAN, and the TCPIP address of the oscilloscope must be defined in the
R&S VSE software.
For tips on how to determine the computer name or TCPIP address, see the oscilloscope's user documentation.
Remote command:
SYSTem:COMMunicate:RDEVice:OSCilloscope:TCPip on page 79
Preselector State
Turns the preselector on and off.
When you turn on the preselector, you can configure the characteristics of the prese-
lector and add the preamplifier into the signal path.
When you turn off the preselector, the signal bypasses the preselector and the pream-
plifier, and is fed into the input mixer directly.
Remote command:
INPut<ip>:PRESelection[:STATe] on page 74
Preselector Mode
Selects the preselection filters to be applied to the measurement.
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Configuration
Input and frontend settings
"Auto"
"Auto Wide"
"Auto Narrow"
"Manual"
Remote command:
INPut<ip>:PRESelection:SET on page 74
10 dB Minimum Attenuation
Turns the availability of attenuation levels of less than 10 dB on and off.
Automatically applies all available bandpass filters in a measurement.
Available with the optional preamplifier.
Automatically applies the wideband filters consecutively:
●
Lowpass 40 MHz
●
Bandpass 30 MHz to 2250 MHz
●
Bandpass 2 GHz to 8 GHz
●
Bandpass 8 GHz to 26.5 GHz
Available with the optional preselector.
Automatically applies the most suitable narrowband preselection fil-
ters in a measurement, depending on the bandwidth you have
selected.
For measurement frequencies up to 30 MHz, the connected instrument uses combinations of lowpass and highpass filters. For higher
frequencies, the connected instrument uses bandpass filters.
Available with the optional preselector.
Applies the filter settings you have defined manually.
When you turn on this feature, the attenuation is always at least 10 dB. This minimum
attenuation protects the input mixer and avoids accidental setting of 0 dB, especially if
you measure EUTs with high RFI voltage.
When you turn it off, you can also select attenuation levels of less than 10 dB.
The setting applies to a manual selection of the attenuation as well as the automatic
selection of the attenuation.
Remote command:
INPut<ip>:ATTenuation:PROTection:RESet on page 70
4.2.1.2 I/Q file input
Or: "Input & Output" > "Input Source" > "I/Q File"
Loading a file via drag&drop
You can load a file simply by selecting it in a file explorer and dragging it to the
R&S VSE software. Drop it into the "Measurement Group Setup" window or the channel bar for any channel. The channel is automatically configured for file input, if necessary. If the file contains all essential information, the file input is immediately displayed
in the channel. Otherwise, the "Recall I/Q Recording" dialog box is opened for the
selected file so you can enter the missing information.
If the file contains data from multiple channels (e.g. from LTE measurements), it can be
loaded to individual input sources, if the application supports them.
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Configuration
Input and frontend settings
The "Input Source" settings defined in the "Input" dialog box are identical to those configured for a specific channel in the "Measurement Group Setup" window.
If the Frequency Response Correction option (R&S VSE-K544) is installed, the R&S
VSE HRP UWB application also supports frequency response correction using Touchstone (.snp) files or .fres files.
Encrypted .wv files can also be imported. Note, however, that traces resulting from
encrypted file input cannot be exported or stored in a saveset.
Input Type (Instrument / File)........................................................................................30
Input File....................................................................................................................... 30
Zero Padding.................................................................................................................31
Input Type (Instrument / File)
Selects an instrument or a file as the type of input provided to the channel.
Note: External mixers are only available for input from a connected instrument.
Note: If the R&S VSE software is installed directly on an instrument, or integrated in
Cadence®AWR®VSS, some restrictions apply on the available input type.
Remote command:
INSTrument:BLOCk:CHANnel[:SETTings]:SOURce<si> on page 77
INPut<ip>:SELect on page 76
Input File
Specifies the I/Q data file to be used for input.
Select "Select File" to open the "Load I/Q File" dialog box.
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