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Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
HIn North America, call 1-800-833-9200.
HWorldwide, visit www.tektronix.com to find contacts in your area.
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This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under t his warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair
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IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY
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Tektronix provides service to cover repair under warranty as well as other services that are designed to meet your specific
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using Tektronix as your service provider you make use of our technology and product knowledge, our world-wide logistics
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Table of Contents
Getting Started
General Safety Summaryxv...................................
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or
Personal Injury
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Symbols and Terms
RSA3408A User Manual
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
xv
General Safety Summary
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
xvi
RSA3408A User Manual
Preface
About This Manual
This is the user manual for the RSA3408A 8 GHz Real-Time Spectrum
Analyzer. It covers the following information:
HDescribes the capabilities of the analyzer and how to install it
HExplai ns how to operate the analyzer: how to control acquisition of,
processing of, and input/output of information
HShows the menu structure and lists accessories of the analyzer
This manual is composed of the following chapters:
HGetting Started describes the product overview, architecture, installation, and
calibration of the analyzer.
HOperating Basics explains the functions of the front, rear, and side panels
and menu items of the analyzer, and describes the basic menu operations.
This section also provides tutorials for beginners. It gives step-by-step
procedures for measurement using a signal generator .
HReference explains the basic concepts of measurement processes and
application-specific operations. It also describes the front panel keys and
menus.
HAppendices provide additional information including the menu tree,
accessories, and cleaning information.
First time users should install the analyzer in Getting Started,thengoto
Operating Basics and perform the tutorials beginning on Page 2--31.
The analyzer uses Microsoft Windows XP as the operating system. This manual
does not describe common usage of Windows XP. Refer to your Windows
manuals as necessary .
RSA3408A User Manual
xvii
Preface
Related Documents
In addition to this user manual, the following documentation is available for
your analyzer. Tektronix part numbers are supplied in Appendix F: Options and
provides specifications and performance verification procedures.
HRSA3408A Service Manual (optional accessory)
describes how to verify the characteristics of, adjust, disassemble, assemble,
and troubleshoot the analyzer, and contains the information required for
repair, including module replacement, and calibration.
PDF Manuals
Optional Software
User Manuals
The programmer manual and technical reference described above are PDF
documents (the file size is about 3 MB and 2 MB, respectively). These files are
stored in this directory on the analyzer hard disk:
C:\Program Files\Tektronix\wca200a\Manuals
Use the USB or LAN interface to copy the files onto your PC, referring to the
following sections:
Side-Panel Interface on page 2--6
Using Windows XP on page 2--28
When using the optional software, refer to the following manuals:
HRSA3408A Option 23: W-CDMA Uplink Analysis Software User Manual
provides operating basics for the W-CDMA uplink analysis.
HRSA3408A Option 24: GSM/EDGE Analysis Software User Manual
provides operating basics for the GSM/EDGE analysis.
HRSA3408A Option 25: cdma2000 Analysis Software User Manual
provides operating basics for the cdma2000 forward and reverse link
analysis.
xviii
H
RSA3408A Option 26: cdma2000 1xEV-DO Analysis Software User Manual
provides operating basics for the cdma2000 1xEV-DO forward and reverse
link analysis.
User Manual provides operating basics for the 3GPP Release 6 analysis.
This manual uses the following conventions:
HFront-panel key and control labels are printed in the manual in upper case
text. For example, SPAN, PEAK, PRINT. If it is part of a procedure, the key
or control label is printed in boldface. For example:
Press SPAN.
HTo identify keys on the front panel, the area name label precedes the key .
For example:
Press the MODE: DEMOD key.
HMe nu and on-screen form titles are printed in the manual in the same case
(initial capitals) as they appear on the analyz er screen, such as Span, Source,
and Channel Power. If it is part of a procedure, the menu title is shown in
boldface. For example:
Press the Source side key.
HA series of keys, controls, and/or menu items separated by an arrow symbol
(→) indicates the order in which to perform the listed tasks. For example:
Select RBW/FFT → Filter Shape...→ Gaussian.
RSA3408A User Manual
xix
Preface
xx
RSA3408A User Manual
Getting Started
Product Overview
The RSA3408A is a portable real-time spectrum analyzer having RF measurement capability up to 8 GHz with wide vector span of 36 MHz. The real-time
spectrum analyzer has a vastly different architecture from traditional t ools, and is
uniquely capable of capturing continuous, intermittent, or random signals with
equal ease. The waveform and measurement results of data acquired seamlessly
can be displayed i n various formats such as spectrum, spectrogram containing
three dimensional information of frequency, time, and amplitude/phase, time
versus amplitude/frequency/phase, AM/F M/PM demodulation, and optionally,
digital demodulation.
Features
HDC to 8 GHz measurement frequency range
H100 Hz to 3 GHz measurement span and 36 MHz vector span
HReal-time analysis for seamless capture of time-varying RF signals
HSpectrum analysis of power, ACPR, C/N, OBW, EBW, and spurious
HAnalog modulation analysis of AM, PM, FM, ASK and FSK signals
HDigital modulation analysis ranging from BPSK to 256QAM (Option 21)
HTime characteristic analysis including pulse measurements
HCCDF analysis
HAM/AM and AM/PM distortion analyses (Option 21)
HTime-correlated simultaneous views
HSpectrum display
HSpectrogram display (frequency versus time versus power)
HTime domain display (IS-95 standard)
HAnalog demodulation display:
time versus modulation factor, phase, or frequency
HDigital demodulation display (Option 21):
constellation, eye diagram, symbol table, or EVM
H8.4 inch TFT color display and sturdy cabinet
RSA3408A User Manual
1- 1
Product Overview
Application
The RSA3408A can perform real-time analysis for the following purposes:
HSignal quality analysis of analog and digital modulation
HUnderstanding frequency and spectral occupancy behavior over time
HCapture and characterization of undesired, unknown, or interfering signals
HDevice/system design or operational diagnostic measurement
HGetting answers to elusive EMI problems
HVCO/synthesizer design
HRFID device characterization
HGeneral purpose digital modulation vector signal analysis (Option)
HSpectrum monitoring
HRadar measurements
HCharacterization, troubleshooting, and verification of wireless designs
(Option):
HGSM/EDGE
HW-CDMA
HHSDPA
Hcdma2000 1x
Hcdma2000 1xEV--DO
HTD-SCDMA
HWLAN 802.11a/b/g
1- 2
RSA3408A User Manual
Real-Time Analysis
Product Overview
This section explains real-time analysis with the comparison of conventional
swept spectrum analyzer and real-time spectrum analyzer.
Conventional Swept
Spectrum A nalyzer
Figure 1--1 is a block diagram of the conventional swept spectrum analyzer.
There are two RF input signals in this example. The RF signal is converted to IF
(intermediate frequency) by the swept local oscillator. IF output goes through a
bandpass filter, where resolution of the spectrum analyzer is defined.
RF input
F
Mixer
Resolution
Local
oscillator
filter
Detector
Display
F
Figure 1- 1: Concept of the swept spectrum analyzer
The filter is swept from F
start
to F
. See Figure 1--2. Only signals within the
stop
filter bandwidth are observed at one point in time. Signal A is detected first and
then signal B is detected and displayed.
RSA3408A User Manual
NOTE. An intermittent signal, such as a burst phenomenon, will not be detected
unless it is present at the exact moment that the filter is being swept past it.
Sweep
F
start
AB
F
stop
Figure 1- 2: Sweep of resolution filter
1- 3
Product Overview
Real-Time Spectrum
Analyzer
The real-time spectrum analyzer is conceptually equipped with a series of
bandpass filters as shown in Figure 1 --3. Signals passing through those filters are
concurrently observed and recorded continuously. Signals A and B are concurrently acquired and displayed as shown in Figure 1--4.
Resolution
filter 1
FF
RF input
Resolution
filter 2
Resolution
filter 3
Resolution
filter N
Detector 1
Detector 2
Display
Detector 3
Detector N
Figure 1- 3: Concept of the real-time spectrum analyzer
Concurrent acquisition
AB
F
start
Figure 1- 4: Concurrent acquisition
F
stop
1- 4
RSA3408A User Manual
Product Overview
The method used to concurrently acquire signals in a certain frequency range is
not bandpass filters, but FFT (Fast Fourier Transformation). The RSA3408A
first acquires a series of frames of data in the time domain, as shown in
Figure 1--5, and then performs the FFT process for each frame. This method
enables continuous analysis of spectra and ensures the capture of real-time
phenomenon such as burst signals in digital mobile communication. The
RSA3408A is equipped with a 102.4 MHz A/D converter to analyze the
spectrum by single scanning for spans up to 36 MHz.
Time
Frame
FFF
FF
Figure 1- 5: Frame acquisition
RSA3408A User Manual
1- 5
Product Overview
Architecture
Figure 1--6 shows the block diagram of the signal processing system.
RF input
Option
down converter
External trigger inputTrigger detection
Q input
I Input
8GHz
IF sampling
A/D converter
(optional)
IF sampling
A/D converter
Memory controller
Local bus
Digital
down converter
FFT
Extended trigger
(optional)
Data memory
64 MB (standard)
256 MB (optional)
Digital IQ output
(optional)
1- 6
Display
Mass Storage
Devices
HDD
FDD
Figure 1- 6: Block diagram
PCI bridge
Windows
board PC
Front panel key
USB
LAN
External interface
GPIB
VGA
RSA3408A User Manual
Product Overview
8GHz
Down Converter
IF Sampling A/D Converter
Digital Down Converter
Converts the RF signal, applied through the front-panel INPUT connector, into a
76 MHz IF signal. This converter processes signals up to 8 GHz by IF conversions in three stages. A 10 MHz oscillator provides a high-accuracy reference for
all stages of IF conversion. The converter also adjusts signals for A/D conversion
using a low-noise amplifier, fine-tuning attenuator, and anti-alias filter. The
output signal from the down converter is sent to the IF sampling A/D converter.
The IF analog output from the down converter enters the A/D converter through
the fine-tuning attenuator, low-noise amplifier, and anti-alias filter, to be
converted into a digital signal. The sampling rate of the A/D converter is
102.4 MHz with a resolution of 14 bits. The I/Q splitter separates the real signal
from the A/D converter into complex (I and Q) components. With Option 03,
you can input I and Q signals from the rear panel connectors.
Performs center frequency and span fine-tuning. The digital data from the A/D
converter is transformed to a complex signal of maximum ±20 MHz, setting any
center frequency to 0 Hz. A decimating filter composed of FIR (Finite Impulse
Response) filters changes the span by effectively reducing the sampling rate. It
allows extremely accurate filtering with minimal spurious emissions. The data
streams from the digital down converter are then divided into frames and saved
in the data memory.
FFT/Extended Trigger
(Optional)
Option 05 provides the digital IQ data output from the rear panel connectors to
store and analyze on an external PC.
Option 02 provides a real-time digital trigger function that monitors the
frequency spectrum for the occurrence of specific events. A trigger mask is used
to set conditions for trigger.
The FFT processor performs high-speed calculations to create extended trigger
signals. The FFT processor performs 1024-point complex FFT at high speed to
create extended trigger signals. The FFT processor consists of an input buffer,
FFT calculation DSP, output buffer, and timing control circuit. Performing a
1024-point complex FFT at 10
real time in spans up to 36 MHz.
Because the trigger comparator is continuously operating at the maximum rate,
no events will be missed. The pre-trigger and post-trigger positions can be set as
needed; events before and after the trigger event can be measured.
5
times per second allows the trigger to operate in
RSA3408A User Manual
1- 7
Product Overview
Data Memory
Windows Board PC
A high-speed 64 MB standard SDRAM stores spectrum data. It is expanded to
256 MB with Option 02. For each data point, I and Q data use 2 bytes. This
memory can store 16, 000 frames for 1 waveform = 1024 points of analysis, and
64,000 frames for Option 02. For example, W-CDMA communication data can
be captured for up to 2.5 seconds on standard and 10 seconds on Option 02. The
memory is accessed from the system controller via the ISA/PCI bridge.
The system controller board has an Intel Celeron 1.2 GHz CPU. It runs on
Windows XP, and controls menu operation from the front panel keys. It is
equipped with a 10 GB hard disk and 3.5 inch disk drive to store data and
settings. Waveforms, menus, and measurement results are shown on the color
display, which uses an 8.4 inch XGA TFT-LCD module.
The standard analyzer has the following external interfaces:
HUSB (for a mouse, keyboard, printer and so on)
HLAN (Ethernet 10/100BASE-T)
HGPIB
HVGA (for an external monitor)
1- 8
RSA3408A User Manual
Installation
This section describes how to install this instrument. The topics are organized as
follows:
HUnpacking to check contents
HApplying the power
HSetting up the stand
HFunctional check
HPowering off the analyzer
HRestart
HBacking up the user file
Before starting installation, you should become familiar with the General Safety
Summary on page xv.
Unpacking to Check Contents
1. This product is packed in a cardboard box for delivery. Before opening the
box, make sure that there is no damage on the surface.
2. Open the box, check that the product has no damage and that all the standard
accessories are found inside. For a list of accessories, refer to Standard
Accessories on page F--3. If you find any damaged or missing components,
contact your local Tektronix representative.
3. It is recommended to keep the box and packing materials. Y ou may need
them to send this product to Tektronix for calibration or repair.
CAUTION. The analyzer has exhaust fans on the side panel. Leave a space of at
least 5 cm (2 in) on both sides for proper air circulation.
RSA3408A User Manual
1- 9
Installation
Applying Power
Power on the analyzer using the following procedure:
AC Power Requirements
Connecting the Power
Cord
The analyzer operates from an AC line frequency of 47--63 Hz, over the range of
90--250 Volts, without the need for configuration, except the power cord. Refer
to page F--2 for the power cord options.
The maximum power consumption is 350 W. Refer to Specifications in the
RSA3408A Technical Reference for additional information on power and
environmental requirements.
CAUTION. Use only power cords that are approved for the country of use. Using
non-approved power cords could result in fire or shock hazard.
1. Plug the power cord into the AC input on the rear panel.
1- 10
AC input
Figure 1- 7: AC Input (rear panel)
2. Connect the plug of the power cord to a properly grounded outlet.
RSA3408A User Manual
Installation
Turning on the Analyzer
1. Turn on the principal power switch on the rear panel.
Principal power switch
Figure 1- 8: Principal power switch (rear panel)
When you turn on the principal power switch, a voltage is applied to the
analyzer standby circuit. Make sure the LED next to the power switch on the
front panel lights up in orange.
2. Turn on the power switch (ON/STANDBY) on the lower left of the front
panel. The LED next to the power switch changes to green.
Power switch
RSA3408A User Manual
LED
Figure 1- 9: Front panel power switch (ON/STANDBY switch)
When you turn on the analyzer, Windows XP boots up. After several
minutes, the analyzer application starts up.
The initial screen appears as shown in Figure 1--10. The displayed spectrum
represents the noise floor of the analyzer.
1- 11
Installation
Figure 1- 10: Initial screen
If “UNCAL” is displayed on top of the screen, run the gain calibration routine
(refer to Calibrating Gain on page 1--23).
CAUTION. Never apply signals with a combined amplitude greater than +30 dBm
to the RF INPUT connector. If you exceed this input rating, you can permanently
damage the analyzer. (The RF INPUT connector is shown in Figure 1--11.)
RF INPUT connector
Max +30 dBm AC + DC
1- 12
Figure 1- 11: RF INPUT connector
RSA3408A User Manual
Setting Up the Stand
Installation
To set up the stand, place the analyzer on a table. Lift the front of the analyzer
and pull out the stand until it is perpendicular to the analyzer.
RSA3408A User Manual
Stand
Figure 1- 12: Setting up the stand
1- 13
Installation
Functional Check
The analyzer has a built-in calibration signal source with a frequency of
100 MHz and an amplitude of approximately --20 dBm. Using t his source,
perform this quick functional check to verify that your instrument is operating
correctly.
1. Turn on the analyzer.
2. Display the spectrum of the calibration signal:
a. Press the S/A key on the front panel and then press the
Spectrum Analyzer side key.
b. Press the PRESET key on the front panel to reset the analyzer.
c.Press the INPUT key on the front panel.
d. Press the Signal Input Port... side key to select Cal100M.
The spectrum of the calibration signal appears.
e.Check that “INPUT: CAL” and “FREE RUN” are displayed in the status
indicator at the upper right of the screen (see Figure 1--13).
Status indicator
Marker readout
Marker
1- 14
Figure 1- 13: Spectrum of the calibration signal (100 MHz, about - 20 dBm)
RSA3408A User Manual
Installation
3. Check the center frequency and peak amplitude using the marker:
a. Press the PEAK key on the front panel to place the marker on the peak
(see Figure 1--13).
b. Check the marker readouts on screen. The frequency should be 100 MHz
and the amplitude should be approximately --20 dBm.
c.Press the MARKER SETUP key on the front panel and then the
Markers side key to select Off. Check that the marker disappears.
4. Check the RBW (Resolution Bandwidth) while changing the span setting.
a. Press the SPAN key on the front panel.
b. Confirm that the span is 36 MHz and the RBW is 100 kHz in the setup
display on the upper part of the screen (see Figure 1--14).
Setup display
SpanRBW
Span setting
Figure 1- 14: Setup display
c.Using the general purpose knob, change the span setting as listed in
Table 1--1 and check that the RBW is displayed correctly.
Table 1- 1: Span and RBW
SpanRBW
36 MHz100 kHz
15 MHz80 kHz
5MHz20 kHz
100 kHz500 Hz
1kHz20 Hz
RSA3408A User Manual
d. Using the numeric keypad, set the span back to 36 MHz.
(Press 3 → 6 → MHz, in that order, on the keypad.)
1- 15
Installation
5. Check the reference level:
a. Press the AMPLITUDE key on the front panel.
b. Make sure that the reference level is set to 0 dBm with the Ref Level
side key. Check that 0 dBm is displayed on the upper left side of the
graticule (see Figure 1-- 15).
c.Use the general purpose knob to set t he reference level to --30 dBm.
d. Confirm that A/D OVERFLOW is indicated in the red box at the top
center of the screen. Make sure that --30 dBm is displayed on the upper
left side of the graticule and that the spectrum waveform is distorted as
shown in Figure 1--15.
A/D overflow indicatorReference level setting
Reference level
Figure 1- 15: Reference level setting and A/D overflow indicator
e.Using the numeric keypad, set the reference level back to 0 dBm.
(Press 0 → ENTER, in that order, on the keypad.)
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RSA3408A User Manual
Installation
6. Check the spectrogram display:
a. Press the S/A key on the front panel.
b. Press the S/A with Spectrogram side key. Check that the spectrogram is
displayed on the lower side of the screen (see Figure 1--16).
c.Press the RUN/STOP key on the front panel to stop data acquisition.
Confirm that the trace display freezes and PAUSE is displayed in the
status indicator at the top right of the screen.
Status indicator
Spectrogram
RSA3408A User Manual
Figure 1- 16: Spectrogram display
1- 17
Installation
Powering Off the Analyzer
Turn off the power switch on the front panel.
CAUTION. When you power on or off the analyzer, you must use the front-panel
power switch. Failure to do so may cause the operating system to s hut down
improperly.
When you power on the analyzer again, wait at least 10 seconds after the last
power off.
When you press the front-panel ON/STANDBY switch, the analyzer starts a
shutdown process (including a Windows shutdown) to preserve settings and then
power off. The LED next to the power switch changes to orange. Avoid using the
rear-panel power switch or disconnecting the power cord to power off the
analyzer.
To completely remove power to the analyzer, perform the shutdown just
described, and then set the power switch on the rear panel to off.
NOTE. Turning off the front-panel power switch does not shut down the principal
power supply completely. To turn off the principal power supply, press the
principal power switch on the rear panel. Turning off the principal power switch
turns off the front-panel LED. When you do not use the analyzer for a long time
or in case of emergency, you should unplug the power cord.
1- 18
RSA3408A User Manual
Restarting the Analyzer
Installation
When the analyzer operates abnormally, use the following procedure to turn the
analyzer off and on again.
NOTE. When the analyzer operates abnormally, it will not be shut down by
turning off the front-panel pow er switch alone.
1. Make sure that the front-panel power switch is in the turned-off position.
2. Turn off the principal power switch on the rear panel.
3. Wait at least 10 seconds and then turn on the principal power switch again.
4. Turn on the front-panel power switch.
When Scan Disk Appears
When the Display
Brightness Is Not Even
If the analyzer was not shut down properly, Windows Scan Disk may run when
you turn on the analyzer. When the Scan Disk screen appears, wait until the Scan
Disk is completed. If an error is detected, refer to the Windows manual for
treatment. For more information on accessing Windows on the analyzer, refer to
Using Windows XP on page 2--28.
It is a characteristic of the LCD (Liquid Crystal Display) panel to sometimes
have uneven brightness, dead pixels (dots t hat never turn on) or stuck pixels
(dots that always stay on). This is neither a malfunction nor a defect, and not a
cause for repair or exchange.
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1- 19
Installation
Backing Up User Files
You should back up your user files on a regular basis to ensure against system
failures. The Back Up tool is located in the System Tool folder in the Accessory
folder of Windows. Start this tool to select the files and folders to back up. For
more information, use Windows online help. For more information about access
to Windows on the analyzer, refer to Using Windows XP on page 2--28.
The following files should be backed up more frequently:
HStatus files (*.sta)
HData files (*. iqt)
HTrace files (*.trc)
HCorrection files (*.cor)
Refer to page 3--229 for details on file operations.
Using LAN
The analyzer is equipped with a LAN Ethernet interface as standard, allowing
you to save data in peripheral devices such as other PCs, hard disks, and MO via
a network. Refer to page 2--6 for connecting to LAN.
Installing Other Applications
The analyzer incorporates Windows XP as the operating system. Some combinations of internal measurement applications and external applications may cause
deterioration in the basic performance or conflicts between these applications.
It is not recommended that you install other applications, including Microsoft Word, Excel, and Outlook, on the analyzer. If you install an external
application, you do so at your own risk, keeping in mind that it may lower the
performance of the analyzer.
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RSA3408A User Manual
Calibration
Perform these routines to optimize the analyzer performance:
HGain calibration
HCenter offset calibration
HDC offset calibration
HIF flatness calibration
HDisplay brightness adjustment
Each item is explained in this section.
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1- 21
Calibration
Cal Menu
Use the CAL key to calibrate the analyzer.
Calibrate All
Calibrate Gain
Calibrate Center Offset
Calibrate DC Offset
Calibrate IF Flatness
Auto Calibration
Service...
Figure 1- 17: Calibration menu structure
Yes / No
The Cal menu contains the following controls:
Calibrate All. Performs all possible calibration operations.
Calibrate Gain. Calibrates the internal gain steps.
Refer to page 1--23 for the gain calibration.
Calibrate Center Offset. This calibration cancels a center offset.
Refer to page 1--24 for the center offset calibration.
Calibrate DC Offset. This calibration cancels DC offset in baseband.
Refer to page 1--25 for the DC offset calibration.
Calibrate IF Flatness. Calibrates the IF (intermediate frequency) flatness.
Refer to page 1--25 for the IF flatness calibration.
Auto Calibration. Determines whether to automatically perform all possible
calibration operations. The default setting is On.
Service... This menu item is only to be used by qualified personnel for repair and
calibration. Refer to the RSA3408A Technical Reference and Service Manual
(optional accessory) for details.
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RSA3408A User Manual
Calibrating Gain
Calibration
If you want to perform all possible calibration operations together, press the
Calibrate All side key. When Auto Calibration is set to Yes, they will be
performed automatically any time the analyzer is in an uncal state.
NOTE. When you run the calibration during signal acquisition, the calibration
starts after the acquisition is completed.
The gain calibration calibrates the analyzer’s amplifier gain using the internal
signal generator. Run this internal calibration routine as required when you boot
the analyzer or when UNCAL (uncalibrated) is displayed during operation.
Allow the analyzer to warm up for 20 minutes before you begin the calibration.
The warm-up period allows electrical performance of the analyzer to stabilize.
During normal operation, when the ambient temperature changes by more than
±5 °C from the temperature at the last calibration, UNCAL is displayed in the
yellow box at the top of the screen (see Figure 1--18). If this happens, run the
gain calibration.
When UNCAL is displayed,
run the gain calibration
UNCALFREE RUN
Frequency
Span
Input Att
Figure 1- 18: UNCAL display
To run the gain calibration, do the following:
1. Press the CAL key on the front panel.
RSA3408A User Manual
2. Press the Calibrate Gain side key.
The calibration runs. It takes several seconds to complete the process.
1- 23
Calibration
Calibrating Center Offset
When you display a spectrum and no input signal is present, a spurious emission
at the center frequency may appear regardless of frequency settings. The center
offset calibration cancels those spurious emissions. If the spurious emission is
too obvious when you narrow the span, run the calibration.
NOTE. Option 03 only. When you input I and Q signals from the rear panel
connectors, set the IQ input signal level to zero externally.
When the spurious emission appears at
the center of the screen with no input
signal, run the center offset calibration.
1- 24
Figure 1- 19: Center offset
To run the center offset calibration, do the following:
1. Press the CAL key on the front panel.
2. Press the Calibrate Center Offset side key.
The calibration runs. It takes several seconds to complete the process.
RSA3408A User Manual
Calibrating DC Offset
Calibration
The DC offset calibration cancels DC offset that appears at 0 Hz in the baseband
(DC to 40 MHz). When you change the amplitude setting and the DC offset is
too obvious, run the DC offset calibration.
When DC offset appears at 0 Hz in
the baseband, run the calibration.
Calibrating IF Flatness
Figure 1- 20: DC offset
To run the DC offset calibration, do the following:
1. Press the CAL key on the front panel.
2. Press the Calibrate DC Offset side key.
The calibration runs. It takes several seconds to complete the process.
The IF flatness calibration adjusts the IF (intermediate frequency) flatness using
the internal signal generat or. It optimizes the flatness of gain and phase within
the IF bandwidth automatically. This calibration i s recommended in digital
modulation analysis.
To run the IF flatness calibration, do the following:
1. Press the CAL key on the front panel.
2. Press the Calibrate IF Flatness side key.
RSA3408A User Manual
The calibration runs. It takes several seconds to complete the process.
1- 25
Calibration
Adjusting Display Brightness
Adjust the brightness of the display according to your environment.
1. Press the SYSTEM key on the front panel (see Figure 1--21).
SYSTEM menu
Display Brightness
SYSTEM key
Figure 1- 21: System menu
2. Press the Display Brightness side key.
3. Turn the general purpose knob to adjust the brightness.
Confirming Performance
The electrical characteristics described in the RSA3408A Technical Reference can
be checked only by our service personnel. If you need any service, contact your
local Tektronix representative.
The setting range is 0 to 100.
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RSA3408A User Manual
Operating Basics
Interface Maps
This section describes the controls, connectors, and display:
HControls and connectors
HFront panel
HRear panel
HSide panel
HUsing a mouse and keyboard
HDisplay screen
HElements of the display
HStatus display
HFront panel key lock
HSetup display
For using the removable hard disk drive (Option 06), refer to Appendix D.
RSA3408A User Manual
2- 1
Interface Maps
Controls and Connectors
Figures 2--1 through 2--3 on the following pages show the controls and connectors on the front, the side, and the rear panels. For the connector specifications,
refer to the RSA3408A Technical Reference.
123
Figure 2- 1: Front panel
4
6
578910
2- 2
RSA3408A User Manual
Interface Maps
Front-Panel Interface
1. Display. LCD (Liquid Crystal Display).
Size: 21.3 cm (8.4 inch)
Resolution: 800 × 600 dots
Color: 256 colors maximum
2. Side Keys. Select menu items associated with menu keys.
3. Menu keys. Select menus. Refer to page 2-- 15 for details.
Refer to page 2--18 for menu operations.
4. Keypad. Enters alphanumeric characters. Refer to page 2--19 for entering a
numeric value and page 3--238 for entering a file name.
5. RF input connector. Connects an input signal.
Type: N-type connector
Input impedance: 50 Ω
Maximum capacity of non-breakdown input: 30 dBm
CAUTION. Do not apply a signal of more than +30dBm; to do so may damage the
instrument.
6. Preamplifier power source. Provides power source for a preamplifier
(optional accessory). Refer to the RSA3408A Technical Reference for
specifications.
7. General purpose knob. C hanges a setting.
8. Up/Down keys. Increases or decreases a value.
Refer to page 2--20 for changing a setting using the general purpose knob or
the up/down keys.
9. Power switch (ON/STANDBY). Refer t o page 1 --10 for applying power.
10. LED. Green on operating, orange on standby.
RSA3408A User Manual
2- 3
Interface Maps
12345
9
87
6
Figure 2- 2: Rear panel
2- 4
RSA3408A User Manual
Interface Maps
Rear-Panel Interface
1. REF IN/OUT connector. A50Ω BNC connector for reference signal
input/output to synchronize the analyzer with other instrument.
I signal differential input. When using one connector as a single-ended input,
terminate the other end in 50 Ω.
3. Q+/Q-- INPUT connector (Option 03 only)
. A50Ω BNC connector for
Q signal differential input. When using one connector as a s ingle-ended
input, terminate the other end in 50 Ω.
For the connectors 1, 2,and3 above, refer to Selecting Input Source on
page 3--227 to control the reference signal input/output and I/Q input.
4. TRIG IN/OUT connector. A50Ω BNC connector for trigger signal
input/output. Refer to page 3--147 for trigger.
5. 421 MHz IF OUT connector. A50Ω BNC connector for 421 MHz IF
(Intermediate Frequency) output.
6. GPIB connector. Used to control t he analyzer from an external controller.
Refer to the RSA3408A Programmer Manual for GPIB control.
7. DIGITAL IQ OUT (Option 05 only). MDR (3M) 50-pin connectors for
generating I and Q data after A/D conversion (refer to Architecture on
page 1--6) to store and analyze on an external PC. For the pin assignment,
refer t o Appendix C.
NOTE. IQ Input (option 03) and Digital IQ Output (option 05) function
connectors are factory pre-installed. The functions are enabled by software key
code entry. Ensure that the required key code has been accepted by the instrument before you use these functions. Refer to Displaying Versions and InstalledOptions on page 2--26 for entering the key code.
8. AC line connector. Connect an AC power cable.
WARNING. The instrument uses a power plug as a disconnecting device.
The instrument shall be installed where the plug can be easily reached by the
operator. When you do not use the instrument for a long time or in case of
emergency, you should unplug the power cord.
9. PRINCIPAL POWER SWITCH. When this switch is on, the internal
standby circuit is energized. Refer to page 1--10 for applying power.
RSA3408A User Manual
2- 5
Interface Maps
1
2
3
4
Side-Panel Interface
5
Figure 2- 3: Side panel
1. Indicator. Indicates whether the disk drive is active.
CAUTION. When this indicator is lit, you must not remove the disk from the disk
drive. If you do so, the data stored on the medium may be destroyed or an error
may occur.
2. Floppy disk drive. A 3.5-inch 2HD (1.44MB) or 2DD (720KB) disk
formatted for MS-DOS can be used to save and load data and settings.
3. LAN Ethernet connector. 10/100BASE-T connector. When you reboot the
analyzer after connecting to LAN, the analyzer recognizes the network speed
automatically and sets it to 10 Mbps or 100 Mbps. You can share resources
such as files or disks on the network.
NOTE. The Windows XP default network settings are done when the instrument is
shipped from the factory. Contact your system administrator for information
about setting network parameters in your LAN.
2- 6
For using Windows XP on the analyzer, refer to page 2--28.
RSA3408A User Manual
Interface Maps
4. VGA output connector. 15 pin D-sub connector (female) to send the
display of this instrument to another monitor.
NOTE. When you use an external monitor, connect a VGA cable to the analyzer
and to the monitor, then turn on the monitor before you turn on the analyzer.
5. USB connectors (two ports). Connect USB devices such as a mouse,
keyboard, and printer. You can connect the devices any time, with no setup
(plug & play), to either or both ports. You can also connect a mouse to a
USB port on a keyboard (see Figure 2--4).
USB
Figure 2- 4: Connecting USB devices
RSA3408A User Manual
2- 7
Interface Maps
Using a Mouse and
Keyboard
Click the menu to
select the item
You can directly input the
value with the keyboard
You can operate the analyzer using the standard accessory mouse and keyboard
instead of the side keys and the front panel keypad.
The mouse and keyboard operations are as follows:
HClick the menu item instead of pressing the side keys.
HIf the menu item has arrow buttons, click them to select the value.
Span
(Hz)
Click the arrow buttons to adjust the value
XXX
Figure 2- 5: Operation with mouse and keyboard
Table 2- 1: Key functions of the keyboard
KeyPurposeFunction
Numeric keys Numeric inputEnter a numeric value in a numeric input field.
Left/Right
arrow keys
HomeCaret moveMoves the caret to the beginning of an input field.
EndCaret moveMoves the caret to the end of an input field.
BackspaceAlphanumeric input Deletes the character before the caret.
DeleteAlphanumeric input Deletes the character after the caret.
ESCAlphanumeric input Aborts a numeric entry and restores the original value.
ENTERAlphanumeric input Accepts a value in the input field.
KorkkeyAlphanumeric input Kilo (103). Press ENTER to complete entry of the value.
MkeyAlphanumeric input Mega (106). Press ENTER to complete entry of the value.
GorgkeyAlphanumeric input Giga (109). Press ENTER to complete entry of the value.
mkeyAlphanumeric input milli (10
UorukeyAlphanumeric input micro (10
NornkeyAlphanumeric input nano (10
Caret moveMoves the caret in an alpha or numeric input field.
-- 3
). Press ENTER to complete entry of the value.
-- 6
). Press ENTER to complete entry of the value.
-- 9
). Press ENTER to complete entry of the value.
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RSA3408A User Manual
Display Screen
Interface Maps
Figure 2--6 shows the elements of the display screen.
3
2
1
4
RSA3408A User Manual
8
765
Figure 2- 6: Display screen configuration
2- 9
Interface Maps
Elements of the Display
1. Setup display area. Displays the current hardware value. Refer to Setup
Display on page 2--13.
2. Progress bar. Indicates the progress of the acquisition cycle on the left bar
and the measurement cycle on the right bar. The progress fills up in blue
fromlefttoright.
3. Date/Time disp l ay area. Shows the current date and time.
4. Status display area. Shows the trigger status. Refer to Status Display on
page 2--11.
5. Side menu display area. When you press a menu key on the front panel, the
menu associated with that key is displayed. Refer to page 2--15 for details of
menu items.
6. Menu setting display area. Displays the last setting of the menu item that
can be set with the general purpose knob.
7. View. The View window displays the waveform or the measurement results.
Multiple views can be displayed on one display screen, depending on the
measurement mode.
For more information, refer to:
Spectrum Analysis (S/A mode)page 3--1
Modulation Analysis (Demod mode)page 3--27
Time Analysis (Time mode)page 3--83
Setting Viewspage 3--183
8. Measurement function display area. Displays the measurement function
currently in use (the settings of the Mode and Measure menus).
2- 10
RSA3408A User Manual
Interface Maps
Status Display
The status display area in the upper right side of the screen (see Figure 2-- 7)
shows the instrument status as listed in Table 2--2.
Status display
Figure 2- 7: Status display
Table 2- 2: Status display
ItemDescription
ARMThe pre-trigger portion of the acquisition record is filling.
A trigger event occurring during this state will not be recognized.
READYPre-trigger data has been acquired, and the instrument is waiting for a
trigger event.
TRIG’DPre-trigger data has been acquired, and a trigger event has been detected.
The instrument is now acquiring post-trigger data.
FREE RUNThe instrument acquires and measures without waiting for a trigger event.
PAUSEThe user has temporarily stopped acquisition/measurement cycling.
The acquired data is stored in the data memory from address zero in order of
acquisition. When you set a trigger condition, the acquired data is stored in the
pre-trigger region until the trigger event occurs. Thereafter, it is stored in the
post-trigger region (see Figure 2--8).
Pre-trigger regionPost-trigger regionData memory
Time
Trigger point
Figure 2- 8: Pre- and post-trigger regions
RSA3408A User Manual
2- 11
Interface Maps
Front Panel Key Lock
When controlling t his instrument through GPIB, you can disable all the keys on
the front panel except the power switch using the :SYSTEM:KLOCK command.
At this time, the message “PANEL LOCK” is displayed on the top side key (see
Figure 2--9).
PANEL LOCK
Front-panel key lock display
Figure 2- 9: Key lock display
To cancel the key lock, the following two methods can be used:
HUse the :SYSTEM:KLOCK command to cancel.
HTurn off the power and then on.
Refer to the RSA3303A and RSA3308A Programmer Manual for information
about the GPIB commands.
2- 12
RSA3408A User Manual
Interface Maps
Setup Display
Setup display
The setup display area in the upper part of the screen shows the analyzer
hardware settings (see Figure 2--10). The contents differ depending on the
measurement mode: spectrum analysis (S/A), m odulation analysis (Demod), or
time analysis (Time), as shown in Table 2--3.
Figure 2- 10: Setup display
Table 2- 3: Setup display
ItemDescriptionMode
FrequencyIndicates the center frequency.All
SpanIndicates the span.
Input Att.Indicates the attenuation of an input signal
before it enters the internal mixer.
RBWIndicates RBW (Resolution Bandwidth) for
compatibility with swept spectrum analyzers.
Refer to FFT and RBW on page 3--163.
NBWIndicates NBW (Noise Bandwidth) instead of
RBW when FFT-processed data does not go
through RBW process.
Trace 1 and 2Indicates the Trace 1 and 2 trace type.
Spectrum LengthIndicates time length of a 1024-point FFT frame.
It is determined by the span.
Spectrum IntervalIndicates time interval between FFT frames.
Refer to FFT Start Point on page 3--166.
Acquisition LengthIndicates time to acquire a block of data.
It can be set in the Timing menu.
S/A
Real Time S/A
Demod and Time
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Interface Maps
2- 14
RSA3408A User Manual
Functional Overview
This section provides the operating fundamentals:
HMenu Keys
HMenu Operations
HMeasurement Basics
HSetting System Parameters
HUsing Windows XP
Menu Keys
Menu keys on the front panel (shown in Figure 2--11 on page 2--16) are divided
into the following three functional groups:
HMEASUREMENT
Sets frequency, amplitude, and time parameters for specified measurement
and controls data acquisition.
HDISPLAY
The Display group is divided into the following three subgroups:
HMODE. Selects a measurement mode.
HVIEW. Selects a view content and scales a measurement graph.
HMARKERS. Controls markers.
HUTILITY
Provides system initialization, waveform storage facilities, instrument
calibration, screen hard copy, and miscellaneous other functions.
RSA3408A User Manual
2- 15
Functional Overview
(pg
)
Measurement groupDisplay groupUtility group
Figure 2- 11: Menu keys
Table 2 --4 summarizes the front-panel menu key functions. For details, refer to
each section listed in the Reference column.
RUN/STOPStart or stop data acquisition.Starting/Stopping Data Acquisition
TRIGControls trigger.Trigger (page 3--147)
RBW/FFTSets RBW and FFT parameters.FFT and RBW (page 3--163)
TRACE/AVGControls trace display and average function.Trace Comparison Display and
Sets frequency or channel.Setting Frequency and Span
(page 3--119)
(page 3--141)
(page 2--24)
Average Function (page 3--173)
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RSA3408A User Manual
Functional Overview
Spect
rumAnalysis(S/AMode
)
(page31
)
(
27)
Analysis(TimeMode)
TimeAnalysis(TimeMode
)
SettingViews(page3183
)
(
211
)
p
g,y
Table 2- 4: Menu key summary (Cont.)
Menu groupReferenceFunctionMenu key
MEASUREMENTM EASURESelects a measurement item.
MEAS SETUPSets measurement parameters.
DISPLAY: MODES/ASelects spectrum analysis.
DEMODSelects modulation analysis.
TIMESelects time analysis.
DISPLAY: VIEWSELECTSelects a view on screen.
DEFINESets view format.
SCALEScales a graph.
LINESControls display lines.Display Line (page 3--203)
DISPLAY: MARKERS PEAKSearches for peak on waveform.
YBA"Move the marker to the next peak.
SELECTSelects a marker.
MARKER ➡Sets parameters based on the marker position.
MARKER SETUPSets marker parameters.
UTILITYHELPDisplays online help.Using Online Help (page 3--223)
INPUTSelects the input source.Selecting Input Source (page 3--227)
CALCalibrates the analyzer.Calibration (page 1--21)
SYSTEMControls system parameters.Setting System Parameters
PRESETReturns settings to the factory defaults.Restoring Default Settings
LOADLoad data from a file.File Operations
SAVESavedatatoafile.
PRINTPrints the screen image.Screen Copy (page 3--253)
MACROShows a menu listing all macros.For installing macros, contact your
MACRO SETUPShows a menu to configure macros.
(page 3--1)
Modulation Analysis (Demod Mode)
page3--
Time
(page 3--83)
Setting Views (page 3--183)
Marker Operation and Peak Search
page3--
(page 2--25)
(page 2--24)
(page 3--229)
local Tektronix sales office.
RSA3408A User Manual
2- 17
Functional Overview
Menu Operations
This section describes basic operations of the analyzer menus and how to select
menu items and input numeric values.
Menu Item Information
Up to nine soft keys can be displayed down the right side of the screen (see
Figure 2--12). Cancel - Back is always displayed at the top, and the other eight
keys select menu items.
Cancel - Back (always displayed)
Returns to the last displayed menu or cancels a partial numeric
entry from the keypad.
Opens a menu.
2- 18
Figure 2- 12: Example menu item display
NOTE. When the setting is prohibited or is not available, the item is displayed in
gray.
RSA3408A User Manual
Functional Overview
Menu Item Types
The different types of menu items are shown in Figure 2--13.
Numeric entry
The current value of parameter is displayed.
To change the value, press the associated side key and use the
general purpose knob, up/down keys, or the keypad.
Toggle
You can switch selection items by pressing the associated side key.
Function execution
The function indicated on the label is executed by pressing the
associated side key. In this example, the “Channel Power” measurement
is performed.
Move to sub-menu
If the label is followed by “...”, you can move to a lower-level
menu by pressing the associated side key.
Move between pages
When the number of menu items is greater than seven, this menu
appears. To move to the next page, press the associated side key.
If you are on the last page, you will return to the first page.
Numeric Input
Invalid
Menu items without labels do not cause any action.
Figure 2- 13: Menu item types
An example numeric input field is shown in Figure 2--14. In this type of field,
you can change the numeric value by turning the general purpose knob, by
pressing the up/down (▲B) keys, or by entering a value using the keypad.
Numeric input field
Figure 2- 14: Numeric setting menu
RSA3408A User Manual
2- 19
Functional Overview
Changing a Setting Using the General Purpose Knob or the Up/Down Keys.
1. Press the side key for setting a numeric value. For example, press
FREQUENCY/CHANNEL → Center Freq to set a center frequency.
The menu item changes to the display as shown in Figure 2--15.
Indicates that numeric values can be changed
with the general purpose knob.
Numeric input field
Figure 2- 15: Changing value with the knob
2. Turn the general purpose knob to increase or decrease the value.
You can also use the up and down (▲B) keys to increase or decrease a
setting value, respectively.
Down key:
Decreases the value.
Up key:
Increases the value.
General purpose knob:
Rotate clockwise to increase the
value and counterclockwise to
decrease the value.
The up and down keys have the same functions as the general purpose knob
except the step size (the amount per click by which the general purpose knob
changes a setting value or the amount per press for the up and down keys) as
follows:
HFor the general purpose knob, the step size is determined internally.
You can not change the step size.
HFor the up and down keys, the step size is set with the Step Size side key.
Refer to Changing the Step Size on page 2--22 for the detail.
The changed value is immediately reflected on the analyzer settings and displays.
2- 20
RSA3408A User Manual
Functional Overview
Entering a Value Using the Keypad. You can enter values using the front panel
keypad, shown in Figure 2--17.
1. Press the side key for setting a numeric value. For example, press
FREQUENCY/CHANNEL → Center Freq to set a center frequency.
The menu item changes to the display shown in Figure 2--16.
Indicates that numeric values can be changed
with the general purpose knob.
Numeric input field
Figure 2- 16: Changing value with the keypad
2. Press the keys required to enter the desired numeric value. For example, t o
enter the frequency 123.45 MHz, press 123.45MHz.
To delete an entered number, press the BKSP (Backspace) key.
Deletes a character before the cursor.
Accepts the input.
Numeric value keys
The unit keys also function as the ENTER key.
Input is immediately accepted when one of those
keys is pressed.
Figure 2- 17: Numeric keypad
3. Confirm the input by pressing the unit key or ENTER key. The confirmed
value is immediately reflected to the analyzer settings and display.
RSA3408A User Manual
Press the Cancel - Back side key to cancel the change.
2- 21
Functional Overview
Changing the Step Size
When using the up and down (YB) keys to increase or decrease a setting value,
you can change the step s ize (the amount per press by which the up or down key
changes the setting value) with the Step Size side key. (The step size cannot be
changed for menu items that do not display Step Size.)
In the example shown in Figure 2--18, the step size for the center frequency is set
to 100 kHz; the displayed frequency set value changes by 100 kHz step for each
press of the up or down key.
Step size
Figure 2- 18: Step size for the center frequency
Step Size for Center Frequency. The step size is set with the Step Size side key.
The center frequency step size can be also set with two side keys in the
Frequency/Channel menu (see Figure 2--19 below).
HCenter Freq Step Same As C.F. Useful for quickly locating harmonics of a
signal seen at the center frequency.
HCenter Freq Step Same As Span. Useful for quickly analyzing a larger
frequency area without overlapping span windows.
Sets the center frequency step size to the
same value as the center frequency.
Sets the center frequency step size to the
same value as the span.
Figure 2- 19: Changing the step size to the predetermined values
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RSA3408A User Manual
Measurement Basics
p
y
1
y
2
7
y
8
3
Functional Overview
Selecting the
When you start a measurement, first select the measurement mode.
Measurement Mode
Spectrum Analyzer
Spectrum analysis
Modulation analysis
Time analysis
Figure 2- 20: Selecting the measurement mode
For details on each mode, refer to the section shown in Table 2--5.
Table 2- 5: Measurement modes
Menu keyMeasurement modeDescriptionReference
S/A with Spectrogram
Real Time S/A
Real Time S/A with Zoom
Standard...
Analog Demod
Digital Demod (Option 21)
Standard...
Transient
CCDF
Pulse Measurements
Signal Source Analysis (Option 21)
Signal Source AnalysisSignal source analysis (Option 21)
1
Contains optional analysis functions. Refer to Appendix F: Options and Accessories for optional software.
RSA3408A User Manual
2- 23
Functional Overview
Starting/Stopping Data
Acquisition
Restoring D efault Settings
Use the RUN/STOP key on the front panel to start or stop data acquisition.
RUN/STOP
Starts or stops data acquisition.
Figure 2- 21: Starting/Stopping data acquisition
If acquisition and measurements are waiting for a trigger, or are paused/stopped,
pressing this key will start the acquisition. If acquisition and measurements are
running, pressing this key will stop acquisition and measurements, aborting the
current acquisition.
The analyzer saves the settings when it is turned off. When you turn on the
analyzer, it starts with the settings as they were when it was shut down.
2- 24
PRESET key
restores default settings for current measurement mode.
SYSTEM → Reset All to F actory Defaults
restores all default settings for the analyzer.
Figure 2- 22: Restoring default settings
HPressing the PRESET key returns the instrument settings to the factory
defaults for the current measurement mode.
HPressing SYSTEM → Reset All to Factory Defaults sets all parameters for
all measurements and modes to the default values.
RSA3408A User Manual
Setting System Parameters
The System menu sets system-wide parameters such as the display brightness,
factory defaults, and GPIB address.
Display Brightness
Reset All to Factory Defaults
Remote Setup...
Version and Installed Options...
Instrument Setup...
Functional Overview
Scroll
Option Key
Change Option Key
Figure 2- 23: System menu
System Menu
Angular Units (Phase)
Digital IQ Output
Degrees / Radians
On / Off
The System menu contains the following controls:
Display Brightness. Adjusts the brightness of display. Setting range: 0 to 100.
Reset All to Factory Defaults. Sets all parameters for all measurements and
modes to the default values.
Remote Setup... Sets GPIB parameters. Refer to the RSA3408A Programmer
Manual for details.
Versions and Installed Options. Displays the current versions of all standard
and optional software, and any third party software licenses. Refer to page 2--26
for information about displaying versions and installed options.
Instrument Setup... Sets the fundamental parameters for measurements.
HAngular Units. Selects degree (default) or radian for the angular unit.
RSA3408A User Manual
HDigital IQ Output. Option05Only.Turns on or off the digital IQ output
from the rear panel connectors.
2- 25
Functional Overview
Displaying Versions and
Installed Options
You can see the system versions and i nstalled options. For information on
options for the analyzer, refer to Appendix F: Options and Accessories.
1. Press the SYSTEM key on the front panel.
2. Press the Versions and Installed Options... side key.
The screen appears as shown in Figure 2--24.
Scroll
Scroll the option list when there are
many options.
System version
Installed options
Option Key / Change Option Key
Allow you to use option (if available).
To check on the availability of option,
contact your local Tektronix office.
Figure 2- 24: Displaying versions and options
The following information is shown on the screen:
HVersion
HMain System: Basic application software version
HSub System: Firmware version
HOption
The table shows version and name of the option installed. The “Option Key”
field tells you the following information:
HPresent: Indicates that you can use the option.
HNot Present: Indicates that you cannot use the option.
For information about how to remove the protection and use the option,
refer to Enabling the Option.
3. To exit the version display, press any front-panel key.
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RSA3408A User Manual
Functional Overview
Enabling the Option.
1. Contact your local Tektronix office to order the option.
You will receive an option key (alphanumeric code).
2. Press the Option Key side key (see Figure 2--24) and enter the option key
using the alphanumeric keypad on the front panel.
NOTE. To input “--” (hyphen), press the “.” (period) key.
3. Press the Change Option Key side key to accept the input.
Now you can use the option on the analyzer.
RSA3408A User Manual
2- 27
Functional Overview
Using Windows XP
This analyzer operates under Windows XP. You can switch to a Windows XP
desktop screen or execute a Windows XP application program.
Displaying the
Windows Desktop
Starting Windows XP
Applications
To display the Windows desktop screen, follow these steps:
1. Connect a USB mouse and keyboard to the analyzer.
For the USB connectors on the side panel, see Figure 2--3 on page 2--6.
2. Use a mouse to move the pointer to the bottom of screen (see Figure 2--25).
The task bar appears.
3. Locate the pointer on the RSA3408A icon in the task bar and right-click.
A menu appears.
4. Select Close from the menu. The analyzer system program terminates and
the Windows XP desktop screen appears.
Switching from Windows Desktop to the Analyzer View. To switch from the
Windows desktop screen to the analyzer view display, from the task bar, select
Start → Program → TEK RTSA. The analyzer program starts.
When you use a mouse to move the pointer to the bottom of screen, a task bar
appears (see Figure 2--25). The task bar contains Start and the analyzer application icons. Follow the Windows XP operating procedure and access Windows
applications using the Start menu.
Setting Date and Time
2- 28
The screen displays the date and time managed by the Windows XP operating
system. You can use the Windows time setting program to set the date and time.
RSA3408A User Manual
Functional Overview
When you move the mouse pointer to
the bottom of the screen, the task bar
appears.
RSA icon
Figure 2- 25: Displaying the Windows XP accessory menu
Task bar
RSA3408A User Manual
2- 29
Functional Overview
2- 30
RSA3408A User Manual
Tutorial
This section provides some basic procedures such as applying power, displaying
the results of measurements, and shutting off the analyzer. This section uses
default settings in most examples.
HPreparations: Connecting devices and applying the power
HDisplaying spectrum
HUsing markers and peak search
HUsing averaging and comparison displays
HDisplaying spectrogram
HSpectrum analysis
HModulation analysis
HTurning off the power
NOTE. You must complete the installation procedures (starting on page 1--9)
before performing any of the following steps.
RSA3408A User Manual
2- 31
Tutorial
Preparations
This tutorial uses a digitally-modulated signal. The following equipment is used
as a signal source:
HAnalog signal generator (example: HP8657B)
HOne 50 Ω coaxial cable
Connecting the Signal
Generator
1. Connect the output of the signal generator to the RF INPUT connector on the
analyzer front panel using a coaxial cable (see Figure 2--26).
RF INPUT
(N type connector)
2- 32
Figure 2- 26: Cable connection
2. Set the signal generator as follows:
Center frequency100 MHz...........
Output level--10 dBm..............
Modulation typeAM...........
Modulation sourceInternal 10 kHz.........
Modulation depth50%..........
RSA3408A User Manual
Tutorial
Applying the Power
1. Apply power to the signal generator.
2. Turn on the principal power switch (PRINCIPAL POWER SWITCH)on
the rear panel, as shown in Figure 2--27. The orange LED on the front panel
lights.
Principal power switch
Power switch
LED
Figure 2- 27: Principal power switch (rear panel)
3. Turn on the power switch (ON/STANDBY) on the front panel, as shown in
Figure 2--28.
Figure 2- 28: Power switch (ON/STANDBY)
RSA3408A User Manual
2- 33
Tutorial
The initial screen shown i n Figure 2--29 appears after Windows XP starts up (the
background color is in white in this manual to make figures more viewable).
Restoring D efault Settings
Figure 2- 29: Initial screen
The analyzer saves the settings when it is turned off. When you turn on the
analyzer, it starts with the settings as they were when it was shut down.
This tutorial starts with the factory default settings. Perform the following steps
to restore the factory default settings:
1. Press the SYSTEM key.
2. Press the Reset All to Factory Defaults side key.
The instrument is now ready to take measurements.
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RSA3408A User Manual
Displaying Spectrum
Amplitude
Tutorial
This section describes how to set t he frequency, span, and amplitude, and then
appropriately display the spectrum. Figure 2--30 shows the settings.
Frequency
(Center frequency)
Setting Center Frequency
and Span
FREQUENCY/CHANNEL key
Span
Figure 2- 30: Frequency, span, and amplitude settings
The center frequency is set to 1.5 GHz, and span is set to 36 MHz when you
power on the analyzer. Change the settings of center frequency and span to
display the waveform around 100 MHz.
1. Press the FREQUENCY/CHANNEL key on the front panel.
RSA3408A User Manual
2- 35
Tutorial
The FREQUENCY/CHANNEL menu, shown in Figure 2--31, is displayed on
the right side of the screen. Notice that the Frequency menu item is available for
entering the numeric value for center frequency.
Center Freq
(Hz)
XXX
Indicates that the general purpose knob
is available
Numeric value input field
Figure 2- 31: Menu items for numeric value input
You can change the value using the general purpose knob or enter the value using
the numeric value entry keypad, shown in Figure 2--32.
2. Enter the new center frequency at 100 MHz. Because the interval between
1.5 GHz (current setting) and 100 MHz is wide, it is more convenient to use
the keypad here.
Press 100MHz, in order, on the keypad.
The GHz, MHz, kHz,andHz keys also function as enter keys. When you press
any of these keys, the numeric value you enter will be set immediately.
If you enter incorrect values, clear them using the BKSP (back space) key and
then enter the correct digit.
2- 36
Clears the character preceding the cursor.
The unit keys also function as enter keys.
When you press any of these keys, the numeric value
you enter will be set immediately.
Accepts the inputs.
Numeric keys
Figure 2- 32: Numeric value entry keypad
RSA3408A User Manual
Tutorial
The spectrum waveform is displayed on the screen as shown in Figure 2--33. The
current setting is displayed on the bottom of the screen (“Center Freq (MHz):
100” in this example).
The current setting is
displayed in this field.
SPAN key
Figure 2- 33: Center frequency of 100 MHz, span of 36 MHz
The next step is to set the span. It is currently set to 36 MHz as the default value.
Change the setting to 20 kHz.
3. Press the SPAN key on the front panel.
RSA3408A User Manual
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Tutorial
The Span menu item is selected.
Span
Indicates that the general purpose knob is available
(Hz)
XXX
4. Turn the general purpose knob to the left to select 20k.
The hardware is set with the selected value immediately.
The spectrum waveform is displayed on the screen as shown in Figure 2--34.
Numeric value input field
2- 38
Figure 2- 34: Center frequency of 100 MHz, span of 20 kHz
RSA3408A User Manual
Tutorial
Setting Up Amplitude
--100 dBm
In Figure 2--35, the vertical scale shows the spectrum view, set up for 10 dB per
division. Ref level is the maximum value of the vertical axis, and it is set to
0 dBm when the analyzer is powered on. Observe the change in the waveform as
you change this setting in the following procedure:
0dBm
Ref Level
setting
10 dB
Figure 2- 35: Setting amplitude
AMPLITUDE key
1. Press the Amplitude key on the front panel.
The Amplitude menu is displayed on the right side of the screen. Notice that
the Ref Level item is available for entering amplitude (see Figure 2--36).
RSA3408A User Manual
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Tutorial
Ref Level
Indicates that the general purpose knob is available
(dBm)
XXX
Figure 2- 36: Menu items for numeric value input
2. Observe the changes in the waveform as you turn the general purpose knob.
HAs you turn the knob to the right, the amplitude increases and the
waveform shifts to a relatively lower position.
HAs you turn the knob to the left, the amplitude decreases and the
waveform shifts to a relatively higher position.
In Figure 2--37, the amplitude is set to 10 dBm. When the amplitude is set to
0 dBm or higher, a blue standard line is displayed indicating 0 dBm.
3. Set the Ref Level back to 0 dBm after confirming the amplitude operation.
Numeric value input field
0 dBm reference line
Figure 2- 37: Reference level of 10 dBm
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RSA3408A User Manual
Tutorial
Starting and Stopping
Data Acquisition
Use the RUN/STOP key to start or stop data acquisition. There are two
acquisition modes: the continuous mode, in which data is acquired repeatedly,
and the single mode, in which one waveform is acquired. You can select the
mode using the Trig menu.
RUN/STOP key
TRIG key
By default, the analyzer is now acquiring data in the continuous mode.
1. Press the RUN/STOP key to stop data acquisition.
When acquisition stops, “PAUSE” is shown in the status indicator on screen
(see Figure 2--38).
Status indicator
Figure 2- 38: Status indicator
2. Acquire data in the single mode using the following steps:
a. Press the TRIG key on the front panel.
b. Press the Repeat... side key and select Single.
c.Press the RUN/STOP key to acquire data. One waveform is acquired
and displayed every time you press the key.
3. Press the Repeat... side key again and select Continuous to return to the
continuous mode.
When acquisition starts, “READY” is displayed in the status indicator,
indicating that the analyzer is ready for trigger.
RSA3408A User Manual
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Tutorial
Using Markers and Peak Search
The markers are used to measure amplitude or frequency (and also t o find the
peak signal).
One or two markers can be displayed as Marker 1 and 2. To measure an absolute
value, only Marker 1 is used, and that is called “single marker mode.” To
measure a relative value, Markers 1 and 2 are used, and that is called “delta
marker mode.” To position the markers, use the general purpose knob or the
numeric input keypad.
Measuring with a
Single Marker
1. Press the MARKER SETUP key on the front panel.
MARKER SETUP key
Selects the behavior of
the markers.
2. Press the Markers side key to select Single.
The marker (V) appears at center on the waveform.
3. The Marker X Position menu item is selected by default. Turn the general
purpose knob to move the marker to a measurement point (see Figure 2--39).
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RSA3408A User Manual
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