This document applies to firmware version 3.20
and above.
Warnin g
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
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 are a.
Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, e ither
will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the
defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new or
reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suita ble arrangements for the performance of servic e. Customer shal l be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid.
Tektronix shall pay for the return of the product to Customer if the shipme nt is to a location within the country in which the
Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
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 this warranty a) to repair damage resulting
from attempts by personnel othe r than Tektronix representatives to install, repair or service the product; b) to repair
damage resulting from improper use or c onnection to incompatible equipment; c) to repair any damage or malfunction
caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or integrat ed with other
products when the effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY
PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL
NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADV ANCE NOTICE OF THE POSSIBILITY
OF SUCH DAMAGES.
Table of Contents
Specifications
Operating Information
Theory of Operation
General Safety Summaryix...................................
Service Safety Summaryxi....................................
Table 6--4: Summary of procedures6--9..........................
Table 6--5: Tools required for module removal6--10.................
Table 6--6: Normal supply voltages6--77...........................
Table 6--7: Test point voltages on A706--78.........................
Table 6--8: Symptoms and faulty modules6--79.....................
RSA3408A Service Manual
vii
Table of Contents
viii
RSA3408A Service Manual
General Safety Summary
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.
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.
Do Not Operate in an Explosive Atmosphere.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
Symbols and Terms
RSA3408A Service Manual
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.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
ix
General Safety Summary
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:
WARNING
High Voltage
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
x
RSA3408A Service Manual
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, and
then disconnect the power cord from the mains power.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
RSA3408A Service Manual
xi
Service Safety Summary
xii
RSA3408A Service Manual
Preface
Manual Structure
This is the service manual for the RSA3408A 8 GHz Real-Time Spectrum
Analyzer. This manual contains information needed to service the analyzer to the
module level.
This manual is divided into sections, such as Specifications and Theory of
Operation. Further, some sections are divided into subsections, such as
Product Description and Removal and Installation Procedures.
Sections containing procedures also contain introductions to those procedures.
Be sure to read these introductions because they provide information needed to
do the service correctly and efficiently. The manual section name and a brief
description of each is given below.
HSpecifications contains a description of the analyzer and the applicable
characteristics.
HOperating Information contains a statement referring you to the RSA3408A
User Manual.
HTheory of Operation contains circuit descriptions that support service to the
module level.
HPerformance Verification contains procedures for confirming that the
analyzer functions properly and meets warranted limits.
HAdjustment Procedures contains procedures for adjusting the analyzer to
meet warranted limits.
HMaintenance contains information and procedures for performing preventive
and corrective maintenance of the analyzer. These instructions include
cleaning, module removal and installation, and fault isolation to the module.
HOptions contains a statement referring you to the RSA3408A User Manual.
HElectrical Parts List contains a statement referring you to Mechanical Parts
List, where both electrical and mechanical modules are listed.
HDiagrams contains a block diagram and an interconnection diagram.
HMechanical Parts List includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.
RSA3408A Service Manual
xiii
Preface
Manual Conventions
This manual uses certain conventions that you should become familiar with.
Some sections of the manual contain procedures for you to perform. To keep
those instructions clear and consistent, this manual uses the following conventions:
HNames of front panel controls and menus appear in the same case (initial
capitals, all uppercase, etc.) in the manual as is used on the analyzer front
panel and menus. Front panel names are all upper-case letters; for example,
SPAN, TRIG, and SELECT.
HInstruction steps are numbered unless there is only one step.
Modules
Safety
Related Documentation
Throughout this manual, any replaceable component, assembly, or part of the
analyzer is referred to generically as a module. In general, a module is an
assembly (like a circuit board), rather than a component (like a resistor or an
integrated circuit). Sometimes a single component is a m odule; for example, the
chassis of the analyzer is a module.
Symbols and terms related to safety appear in the Safety Summary near the
beginning of this manual.
Other documentation for the RSA3408A analyzer includes:
HThe RSA3408A User Manual contains a tutorial to quickly describe how to
operate the analyzer. It also includes an in-depth discussion on how to more
completely use the analyzer features.
HThe RSA3408A Programmer Manual explains how to use t he GPIB interface
to remotely control the analyzer.
xiv
RSA3408A Service Manual
Introduction
This manual contains information needed to properly service the RSA3408A
8 GHz Real-Time Spectrum Analyzer as well as general information critical to
safe and effective servicing.
To prevent personal injury or damage to the analyzer, consider the following
before attempting service:
HThe procedures in this manual should be performed only by a qualified
service person.
HRead the General Safety Summary and the Service Safety Summary,
beginning on page ix.
HRead the RSA3408A User Manual (Tektronix part number 071-1617-xx) for
operating information.
When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.
Performance Check Interval
Strategy for Servicing
Generally, the performance check described in section 4, Performance Verification, should be done every 12 months. In addition, performance check is
recommended after module replacement.
If the analyzer does not meet performance criteria, repair is necessary.
Throughout this manual, the term “module” refers to any field-replaceable
component, assembly, or part of the analyzer.
This manual contains all the information needed for periodic maintenance of the
analyzer. (Examples of such information are procedures for checking performance.)
Further, it contains all i nformation for corrective maintenance down to the
module level. To isolate a failure to a module, use the fault isolation procedures
found in Troubleshooting, part of section 6, Maintenance. To remove and replace
any failed module, follow the instructions in Removal and Installation Proce-dures, also part of section 6. After isolating a faulty module, replace it with a
fully-tested module obtained from the factory. Section 10, Mechanical PartsList, contains part number and ordering information for all replaceable modules.
RSA3408A Service Manual
xv
Introduction
xvi
RSA3408A Service Manual
Specifications
This section contains the RSA3408A 8 GHz Real-Time Spectrum Analyzer
specifications. All specifications are guaranteed unless labeled Typical. Typical
specifications are provided for your convenience.
NOTE. In these tables, those warranted characteristics that are checked in the
Performance Verification appear with the n symbol in the Characteristics
column.
Performance Conditions
The performance limits in this specification are valid with these conditions:
HThe analyzer must have been calibrated and adjusted at an ambient tempera-
HThe analyzer must be in an environment with temperature, altitude,
ture between +20
humidity, and vibration within the operating limits described in these
specifications.
_C and +30 _C.
HThe analyzer must have had a warm-up period of at least 20 minutes.
RSA3408A Service Manual
1- 1
Specifications
Electrical Characteristics
Table 1- 1: Frequency
CharacteristicsDescription
Measurement frequency
Frequency rangeOverall: DC t o 8 GHz
Baseband: DC to 40 MHz
RF1: 40 MHz to 3.5 GHz
RF2: 3.5 GHz to 6.5 GHz
RF3: 5 GHz to 8 GHz
Center frequency setting resolution0.1 Hz
n Frequency marker readout accuracy
Residual FM (Typical)2Hzp--p
Span accuracy±1bin
RBW filter bandwidth accuracy0.1% against noise bandwidth
Reference frequency
Aging per day1 × 10
Aging per year1 × 10
Temperature drift1 × 10
n Total frequency error
Reference output level>0 dBm
External reference input10 MHz, --10 to +6 dBm. Spurious level must be <--80 dBc within 100 kHz offset.
RE: Reference frequency error; MF: Marker frequency [Hz]
The first term (RE × MF) shows the frequency uncertainty due to the reference
frequency error. The second term (0.001 × Span) shows the uncertainty due to the
limited bin number. Because more than 500 bins are available in the frequency
display, 0.5 bin uncertainty corresponds to 0.001. The third term is the residual FM.
Data outputI data: 16-bit LVDS; Q data: 16-bit LVDS
Control outputClock: LVDS, max 51.2 MHz; Data valid: LVDS, not used
Control inputOutput enable: Connecting GND enables output
Setup time>5 ns (data transition to clock rising edge). See Figure 1--1.
Hold time>5 ns (clock rising edge to data transition). See Figure 1--1.
Flatness of output data before correction
Amplitude+1/--5 dB (36 MHz span); +1/--2 dB (20 MHz span)
Phase±100_ (36 MHz span); ±15_ (20 MHz span)
1- 14
RSA3408A Service Manual
Setup timeHold time
Specifications
Data
(EXT_I*/EXT_Q*)
Clock
(EXT_IQ_CLK)
ValidInvalid
Figure 1- 1: Definition of the setup and hold time
Table 1- 19: Power requirements
CharacteristicsDescription
Rating voltage100 to 240 VAC
Voltage range90 to 250 VAC
Line frequency47 to 63 Hz
Mains Fuse DataDensei--Lambda supplies: 5 A, Time--delayed, 250 V (not operator replaceable)
Cosel supply: 2 A, Time--delayed, 250 V (not operator replaceable)
Heat dissipation
Maximum power400 VA
Maximum line current5Armsat50Hz(90Vlinewith5%clipping)
Surge currentMaximum 52 A peak (25 _C) for ≤5 line cycles after the product has been turned off
foratleast30s.
RSA3408A Service Manual
1- 15
Specifications
Physical Characteristics
Table 1- 20: Physical characteristics
CharacteristicsDescription
Dimensions
Width425 mm (16.7 in) without belts
Height215 mm (8.5 in) without feet
Depth425 mm (16.7 in) without cover and feet
Net weight20 kg
Environmental Characteristics
Table 1- 21: Environmental characteristics
CharacteristicsDescription
Temperature
Operating+10to+40_C
Nonoperating-- 2 0 t o + 6 0 _C
Relative humidity
Operating and nonoperating20 to 80% (no condensation), maximum wet-bulb temperature 29 _C
Altitude
OperatingUp to 3000 m (10000 ft)
NonoperatingUp to 12000 m (40000 ft)
Vibration
Operating2.65 m/s2rms (0.27 G rms), 5 to 500 Hz
Nonoperating22.3 m/s2rms (2.28 G rms), 5 to 500 Hz
Shock
Nonoperating196 m/s2(20 G), half-sine, 11 ms duration
Three shocks in each direction along each major axis, total of 18 shocks
Cooling clearance
Bottom20 mm (0.79 in)
Both sides50 mm (1.97 in)
Rear50 mm (1.97 in)
1- 16
RSA3408A Service Manual
Specifications
Table 1- 22: Certifications and compliances
CharacteristicDescription
EC Declaration of Conformity -- EMCMeets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance
was demonstrated to the following specifications as listed in the Official Journal of the
European Communities:
EN 61326EMC requirements for Class A electrical equipment for
measurement, control and laboratory use.
1
IEC 61000-4-2Electrostatic discharge immunity
(Performance criterion B)
IEC 61000-4-3RF electromagnetic field immunity
(Performance criterion A)
IEC 61000-4-4Electrical fast transient / burst immunity
(Performance criterion B)
IEC 61000-4-5Power line surge immunity
(Performance criterion B)
IEC 61000-4-6Conducted RF immunity
(Performance criterion A)
IEC 61000-4-11Voltage dips and interruptions immunity
(Performance criterion B)
EN 61000-3-2AC power line harmonic emissions
EN 61000-3-3Power line voltage fluctuation/flicker
Australia/New Zealand Declaration of
Conformity -- EMC
Complies with EMC provision of Radiocommunications Act per the following
standard(s):
AS/NZS 2064.1/2Industrial, Scientific, and Medical Equipment: 1992
EC Declaration of Conformity -- Low VoltageCompliance was demonstrated to the following specification as listed in the Official
Journal of the European Union:
Low Voltage Directive 73/23/EEC, amended by 93/68/EEC
EN 61010-1:2001Safety requirements for electrical equipment for
measurement control and laboratory use.
U.S. Nationally Recognized Testing Laboratory
UL61010-1Standard for electrical measuring and test equipment.
Listing
Canadian CertificationCAN/CSA C22.2 No. 61010-1-04
CSA safety requirements for electrical and electronic
measuring and test equipment.
Additional ComplianceANSI/ISA 82.02.01:2004Safety standard for electrical and electronic test,
measuring, controlling, and related equipment.
IEC61010-1Safety requirements for electrical equipment for
measurement, control, and laboratory use.
1
Emissions which exceed the levels required by this standard may occur when this equipment is connected to
a test object.
RSA3408A Service Manual
1- 17
Specifications
Table 1- 22: Certifications and compliances (Cont.)
CharacteristicDescription
Overvoltage Category DescriptionTerminals on this product may have different installation (overvoltage) category
designations. The installation categories are:
CAT IIIDistribution-level mains (usually permanently connected). Equipment at this
level is typically in a fixed industrial location.
CAT IILocal-level mains (wall sockets). Equipment at this level includes
appliances, portable tools, and similar products. Equipment is usually
cord-connected.
CAT ISecondary (signal level) or battery operated circuits of electronic equipment.
Overvoltage CategoryOvervoltage Category II (as defined in IEC61010-1)
Pollution Degree DescriptionA measure of the contaminates that could occur in the environment around and within
a product. Typically the internal environment inside a product is considered to be the
same as the external. Products should be used only in the environment for which they
are rated.
Pollution Degree 1No pollution or only dry, nonconductive pollution occurs.
Products in this category are generally encapsulated,
hermetically sealed, or located in clean rooms.
Pollution Degree 2Normally only dry, nonconductive pollution occurs.
Occasionally a temporary conductivity that is caused by
condensation must be expected. This location is a
typical office/home environment. Temporary
condensation occurs only when the product is out of
service.
Pollution Degree 3Conductive pollution, or dry, nonconductive pollution that
becomes conductive due to condensation. These are
sheltered locations where neither temperature nor
humidity is controlled. The area is protected from direct
sunshine, rain, or direct wind.
Pollution Degree 4Pollution that generates persistent conductivity through
conductive dust, rain, or snow. Typical outdoor locations.
Pollution DegreePollution Degree 2 (as defined in IEC61010-1). Note: Rated for indoor use only.
Safety Certification Compliance
Equipment TypeTest and measuring
Safety ClassClass I (as defined in IEC61010-1) -- grounded product
Operating Temperature Range+5 to +40 _C
1- 18
RSA3408A Service Manual
Digital IQ Output Connector Pin Assignment (Option 05 Only)
Figure 1- 2: Digital IQ output connector pin assignment
Table 1- 23: I OUTPUT connector pin assignment
Specifications
125
2650
Pin numberSignal nameDescription
1IQ_ENABLE*IQ output enable signal input
Open: IQ output disable
Connect to GND: IQ output enable
26GNDGround
2GNDGround
27GND
3EXT_I0--I output data (bit 0), LVDS
28EXT_I0+
4EXT_I1--I output data (bit 1), LVDS
29EXT_I1+
5EXT_I2--I output data (bit 2), LVDS
30EXT_I2+
6EXT_I3--I output data (bit 3), LVDS
31EXT_I3+
7GNDGround
32GND
8EXT_I4--I output data (bit 4), LVDS
RSA3408A Service Manual
33EXT_I4+
9EXT_I5--I output data (bit 5), LVDS
34EXT_I5+
1- 19
Specifications
Table 1- 23: I OUTPUT connector pin assignment (Cont.)
Pin numberDescriptionSignal name
10EXT_I6--I output data (bit 6), LVDS
35EXT_I6+
11EXT_I7--I output data (bit 7), LVDS
36EXT_I7+
12GNDGround
37GND
13EXT_I8--I output data (bit 8), LVDS
38EXT_I8+
14EXT_I9--I output data (bit 9), LVDS
39EXT_I9+
15EXT_I10--I output data (bit 10), LVDS
40EXT_I10+
16EXT_I11--I output data (bit 11), LVDS
41EXT_I11+
17GNDGround
42GND
18EXT_I12--I output data (bit 12), LVDS
43EXT_I12+
19EXT_I13--I output data (bit 13), LVDS
44EXT_I13+
20EXT_I14--I output data (bit 14), LVDS
45EXT_I14+
21EXT_I15--I output data (bit 15), LVDS
46EXT_I15+
22GNDGround
47GND
23GND
48GND
24EXT_IQ_DAV--Not used
1- 20
49EXT_IQ_DAV+
25EXT_IQ_CLK--IQ output clock, LVDS
50EXT_IQ_CLK+
RSA3408A Service Manual
Table 1- 24: Q OUTPUT connector pin assignment
Pin numberSignal nameDescription
1IQ_ENABLE*IQ output enable signal input
Open: IQ output disable
Connect to GND: IQ output enable
The operating information for this instrument is available in the RSA3408A User
Manual (Tektronix part number 071-1617-xx) that shipped with your product.
RSA3408A Service Manual
2- 1
Operating Information
2- 2
RSA3408A Service Manual
Theory of Operation
This section describes the electrical operation of the RSA3408A analyzer using
the major circuit blocks or modules shown in Figure 9--1 on page 9--3.
RF Input
The RF input circuit block consists of a relay for signal switching (Input Relay),
Step Attenuator, P rogrammable Bandpass F ilter, and a control circuit for these
components. This block adjusts the level of input signal as appropriate in
accordance with reference level settings, and sends the signal to the 1
Input Relay located just after the RF INPUT connector is for calibration signal
switching. It switches t o pass the internal calibration signal when self gain-calibration or IF flatness calibration is selected. The step attenuator that follows is a
programmable attenuator of 5 dB/step. It attenuates an input signal up to 55 dB .
Band Relay switches signal paths between the RF1 band and the RF2/RF3 band.
In the RF2 and RF3 bands, bandwidth of the signal is limited by the Programmable Bandpass Filter (BPF) to avoid occurrence of images and/or spurious
signals. This Programmable BPF is able to adjust its center frequency in the
range of 3.5 GHz to 8 GHz, and adjustment to the center frequency is achieved
with the current output from the A100 Cal Generator board. In a same way, the
attenuator and relays are controlled with currents from the A100 board.
st
converter.
Down Converter
RF3 Module
RSA3408A Service Manual
On the A100 Cal Generator board, various components are installed, such as: a
group of registers to save the setup data from Hardware Controller, driver
circuits for attenuator and relays, D/A converter circuit for generation of tuning
current to Programmable BPF, ALC circuit to maintain the amplitude of the
calibration signal at a constant level, IQ modulator for IF flatness calibration,
and other components.
The RF3 module contains the 1stConverter, 1stLocal Oscillator, 1stIF Amplifier, and other components. After level adjustment in the RF input circuit, the
input signal is applied to the 1
signal is frequency-converted into 1
Oscillation frequency of 1
(RF4 module) in this case, so that 1
mately 4231 MHz. After this, the 1
Amplifier that has a gain of approximately 17 dB, and is sent to the 2
Converter (RF2 module).
st
Converter. Mixed with 1stLO signal, the input
st
st
Local Oscillator is controlled with a synthesizer
IF signal of approximately 4231 MHz.
st
IF signal is always maintained at approxi-
st
IF signal passes through the 1stIF
nd
3- 1
Theory of Operation
st
In the baseband, an input signal enters the 1
Converter. Then the signal path i s
switched with a relay and the signal is sent directly to the A10 A/D board for
A/D conversion. In the RF1 band, an input signal goes through all converters
st,2nd
(1
frequency-converted by the 1
421 MHz, then sent directly to the 3
, and 3rd). In the RF2 and RF3 bands, an input signal is directly
st
Converter into the 2ndIF signal of approximately
rd
Converter, bypassing the 2ndConverter.
RF2 Module
RF5 Module
The RF2 module consists of the 2
st
Oscillator (LO). The 1
IF signal sent from the 1stConverter passes through a
nd
Converter, 2ndIF Filter, and 2ndLocal
Bandpass Filter and a Lowpass Filter for removal of unnecessary frequency
bands. After this, the 1
st
the 1
the 2
IF signal is mixed with the 2ndLO signal and frequency-converted into
nd
IF signal of approximately 421 MHz.
st
IF signal enters the 2ndConverter. In the 2ndConverter,
Thesameistrueof1stLO; the 2ndLO frequency is controlled by a synthesizer
nd
circuit (RF4 module) to stabilize the LO output frequency. The 2
nd
sent to the 2
IF Filter, which has two filters with the pass bandwidth of
IF signal is
40 MHz and 4 MHz, respectively.
The RF5 module consists of the 3
rd
converter, the signal is mixed with the 3rdLO signal and then frequency-con-
3
verted into the 3
rd
IF signal of 76 MHz normally, which is changed to 39 MHz in
rd
Converter and the 3rdIF Gain block. In the
an ACLR measurement with the sweep mode. In the RF2 and RF3 bands, the 2
IF signal from the RF2 module enters the band switching relay i n the input
rd
section of the 3
Converter.
The 3rdIF Gain block consists of a Step Amplifier of 12 dB/step with the
maximum gain of 60 dB and a Step Attenuator with the maximum attenuation of
rd
31 dB. This block maintains t he 3
IF signal to be sent to A/D Converter at an
appropriate level, and adjusts the accuracy of conversion gain.
nd
3- 2
RF6 Module
The RF6 module consists of the 3
10 MHz Reference Oscillator. The 3
rd
IF Filter block, Oscillator block, and
rd
IF signal enters the 3rdIF Filter containing
two filters with the pass bandwidth of 40 MHz for 76 MHz IF and 1.2 MHz for
38 MHz IF, respectively, which are software-selectable.
The Oscillator block contains the 3
rd
local oscillator with the local frequency of
345 MHz for 76 MHz IF or 383 MHz for 38 MHz IF, and A/D clock with the
rd
clock frequency of 102.4 MHz. Both the 3
LO signal and A/D clock signal
generated in the Oscillator block are highly stabilized signals locked with a
rd
10 MHz reference signal, and are output to the 3
Converter and A10 A/D
board, respectively.
RSA3408A Service Manual
Theory of Operation
The 10 MHz Reference Oscillator is configured around an OCXO (Oven
Controlled Crystal Oscillator) with extremely high frequency stability. It is used
as the reference clock source for all the oscillators including the frequency
synthesizer circuits. Circuits such as the input circuit of external 10 MHz
reference signal, internal/external reference switching circuit, and 10 MHz
reference output circuit are also contained in the RF6 module.
RF4 Module
The RF4 module is comprised of synthesizer circuits. The synthesizer consists of
multiple PLL Oscillator units of low noise type locked with the 10 MHz
reference signal. By changing the oscillation frequency of these PLL Oscillator
in fine steps, 1
while maintaining a good level of C/N.
The synthesizer also contains a circuit for generation of a 400 MHz signal to be
used as the reference for the calibration signal, PLL circuitry of the 2
Oscillator, a circuit for generation of DDS signal to be used as the reference
signal for the 3
Digital Signal Processing
A10 A/D Board
Analog signals such as the IF signal sent from the Down Converter block are
converted into digital format with a high-speed, high-accuracy A/D converter,
and sent to the A40 DIFP board via the A50 Mother board. The A/D board
contains input circuits for three analog signals: IF signal, baseband signal, and
external IQ signal (optional). Each input circuit is equipped with a B uffer
Amplifier, a Step Amplifier, and a Step Attenuator to maintain the signal level as
appropriate, as well as a Lowpass Filter for removal of signal components within
unnecessary frequency bands.
st
LO frequency can be tuned in the range of 4 GHz to 8 GHz
nd
rd
Local Oscillator, and other components.
Local
A40 DIFP Board
RSA3408A Service Manual
The A40 DIFP (Digital IF Processor) board consists of an IQ Splitter, Digital
Filters, Trigger Detector, and Acquisition Memory. After being converted into
digital format in the A10 A/D board, the input signal is split into I and Q signals
by the IQ Splitter. At the same time, I/Q signals are frequency-shifted so that
each of them occupies a frequency band centered at frequency zero point (DC).
I/Q signals output from IQ Splitter are sent to the Digital Filters. In these filters,
bandwidth of these signals is limited corresponding with span settings. In
addition, re-sampling is performed to achieve the higher frequency resolution.
I/Q signals output from the Digital Filters are sent t o the Trigger Detector and
Acquisition Memory.
3- 3
Theory of Operation
The Trigger Detector achieves real-time frequency trigger function. When the
Frequency Mask Trigger function is activated, window function operation is
executed to the input signal first. To accelerate the operation, data are divided
into two groups: the odd frame data and the even frame data. With pipeline-connected FFT processors, real-time FFT is applied t o these groups of data. After
being converted into frequency domain, the data are further converted into the
power domain with a pipeline-connected quadrature-to-polar coordinates
converter. After comparison with the reference data, the trigger board outputs the
trigger detect signal. When the Power Trigger function is activated, window
function operation and FF T operation mentioned above are bypassed. The data of
the time domain are converted into the power domain and sent to Trigger
Comparator .
The Acquisition Memory saves time domain data separated into I and Q signals.
The A40 DIFP board also interfaces between the data block and Windows
system. I/Q data output from the digital filter is saved to the dual port SRAM,
and then transferred to SDRAM as a block of data. The memory block of
SDRAM is also connected to the PCI local bus via a different dual port SRAM.
This allows the Windows system to refer to the contents copied to this dual port
SRAM as the data on the PCI memory space. The TRIG IN and OUT connectors
located on the rear panel are connected with this board. An external trigger signal
input is used, in addition, as the timing reference signal for the address controller. The A40 board also contains a microprocessor that controls various software
settings and various types of hardware as well as peripheral devices such as
ROM/RAM.
Power Supply
Power Supply 1 and 2
A70 DC Power Board
The power supply circuit consists of two units of AC/DC Converter (Power
Supply 1 and 2) energized from AC power line, and A70 DC power board,
which regulates the output voltages of AC/DC converter units and distributes the
regulated outputs to each of the boards and fans.
Note that P ower Supply 1 and 2 units have different output voltage specifications. The Power Supply 1 output voltages are +5 V / +15 V / --15 V / +24 V; the
Power Supply 2 output voltages are +5 V / +12 V / --12 V / +3.3 V.
The A70 DC Power board is equipped with multiple DC/DC converters, and
based upon the output voltages supplied by the Power Supply 1 and 2 units,
power voltages other than above are generated on this board. On the A70 DC
Power board, LED indicators and test points are provided to facilitate checking
that all the power supply voltages are output normally.
3- 4
RSA3408A Service Manual
Theory of Operation
Standby Power and
On/Standby Switch
A50 Mother Board
External Interface
Power Supply 3 is the standby power supply unit which continuously supplies
power to some areas of the CPU board and the 10 MHz Reference Oscillator
even if the Power Switch on the main unit is turned off (standby mode). Unless
the Principal Power Switch (located on the rear panel) is turned off, Power
Supply 3 continues to output power voltages. Because of this, remove AC power
before opening the enclosure to service inside the unit.
The Standby Power Supply always maintains the ACP I (power control) function
for the CPU board to be active. With this function, the CPU board recognizes the
On status of the On/Standby Switch even in t he power-off condition and is able
to output the power-on signal to Power Supply 1 and 2 units. To enable accurate
high frequency measurements just after power-on, power is also supplied to the
10 MHz Oscillator (OCXO) from Standby Power Supply unit.
The A50 Mother board distributes power to all boards and modules, as well as
interfacing of control signals and data with the CPU. Other devices such as the
PCI Bridge, Local Bus Controller, GPIB Control Circuit, and Bus Buffer for
CPU bus expansion are also on the A50 Mother board.
A60 Front Key Board
A62 Front Connection
Board
A microprocessor for key control is installed on the A60 Front Key board.
Various processes such as serial conversion of key scan, key code, and signal
transmission to the CPU board are performed on this board.
The A62 Front Connection board interfaces with peripheral devices such as hard
disk drive, floppy disk drive, LCD (Liquid Crystal Display), USB, and keys with
the CPU board.
RSA3408A Service Manual
3- 5
Theory of Operation
3- 6
RSA3408A Service Manual
Performance Verification Procedures
Two types of Performance Verification procedures can be performed on this
product; Brief Procedures and Performance Tests. You may not need to perform
all of these procedures, depending on what you want to accomplish.
HTo rapidly confirm that the analyzer functions properly and was adjusted
properly, do the brief procedures under Functional Tests and Diagnostics,
which begin on page 4--3.
Advantages: These procedures are quick to do, require no external
equipment or signal sources, and perform functional and accuracy testing to
provide high confidence that the analyzer will perform properly. They can be
used as a quick check before making a series of important measurements.
HIf more extensive confirmation of performance is desired, do the Perfor-
mance Tests, beginning on page 4--9, after doing the Functional Tests and
Diagnostics just referenced.
Advantages: These procedures add direct checking of warranted specifications.
Disadvantages: They require more time to perform and suitable test
equipment is required. (Refer to Equipment Required on page 4--10.)
RSA3408A Service Manual
4- 1
Performance Verification Procedures
Conventions
Throughout these procedures, the following conventions apply:
HEach test procedure uses the following general format:
HEach procedure consists of as many steps, substeps, and subparts as required
1. First Step
Title of Test
Equipment Required
Prerequisites
Procedure
to do the test. S t eps, substeps, and subparts are sequenced as follows:
a. First Substep
HFirst Subpart
HSecond Subpart
b. Second Substep
2. Second Step
HInstructions for menu selection follow this format:
FRONTPANELKEY> Side Menu Key > Submenu Key.
For example, “Press MODE: DEMOD > Digital Demod > Constellation”.
“MODE: DEMOD” indicates the DEMOD key in the MODE menu area on
the front panel.
HIn steps and substeps, the lead-in statement in italics tells you what to do,
and the instructions that follow tell you how to do it.
The example step below i s telling you to set the analyzer controls by
pressing the specified key sequence.
Set the RSA3408A analyzer controls:
Press MODE: DEMOD > Digital Demod > Constellation.
STOP. “STOP” is accompanied by information you must read to do the
procedure properly.
4- 2
RSA3408A Service Manual
Brief Procedures
The Functional Tests use the internal calibration signal as a test-signal source for
further verifying that the analyzer functions properly.
The Diagnostics use internal routines to verify that the instrument functions
properly and passes the internal circuit tests.
The Functional Tests begin on page 4--4 and the Diagnostics procedures are on
page 4--8.
RSA3408A Service Manual
4- 3
Brief Procedures
Functional Tests
The analyzer has a built-in calibration signal source with an amplitude of
approximately --20 dBm and frequency of 100 MHz. Using this source, perform
this quick functional check to verify that your instrument is operating correctly.
Equipment
Required
PrerequisitesPower on the analyzer and allow a 20 minute warm-up before doing
1. Initialize the analyzer:
a. Press the SYSTEM key on the front panel.
b. Press the Reset All to Factory Defaults side key.
2. Check the system version and options:
a. Press the SYSTEM key on the front panel.
b. Press the Versions and Installed Options... side key.
c.Check the version in the “Main System” field and the options in the
option table.
3. Check the display brightness:
a. Press the Cancel--Back (top) side key.
b. Press the Display Brightness side key.
None
this procedure.
4- 4
c.Change the value from 0 to 100% using the general purpose knob to
check that the brightness changes normally.
4. Display spectrum of the calibration signal:
a. Press S/A > Spectrum Analyzer.
b. Press the PRESET key on the front panel to reset the analyzer.
c.Press INPUT > Signal Input Port... > Cal100M.
The spectrum of the calibration signal appears.
d. Check that “INPUT: CAL” and “FREE RUN” are displayed in the status
indicator at the upper right of the screen (see Figure 4--1).
RSA3408A Service Manual
Status indicator
Brief Procedures
Marker readout
Marker
Figure 4- 1: Spectrum of the calibration signal (100 MHz, - 20 dBm)
5. 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 4--1).
RSA3408A Service Manual
b. Check the marker readouts on screen. The frequency should be 100 MHz
and the amplitude should be approximately --20 dBm.
c.Press MARKER SETUP > Markers > Off.
Check that the marker disappears.
6. 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 t he upper part of the screen (see Figure 4--2).
4- 5
Brief Procedures
Setup display
SpanRBW
Span setting
Figure 4- 2: Setup display
c.Using the general purpose knob, change the span setting as listed in
Table 4--1 and check that the RBW is displayed correctly.
Table 4- 1: Span and RBW
SpanRBW
36 MHz100 kHz
15 MHz80 kHz
5MHz20 kHz
100 kHz500 Hz
1kHz20 Hz
d. Using the numeric keypad, set the span back to 36 MHz.
(Press 3 > 6 > MHz, in that order, on the keypad.)
7. 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. C heck that 0 dBm is displayed on the upper left side of the
graticule (see Figure 4--3).
c.Use the general purpose knob to set the 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 4--3.
e.Using the numeric keypad, set the reference l evel back to 0 dBm.
(Press 0 > ENTER, in that order, on the keypad.)
4- 6
RSA3408A Service Manual
Reference level
Brief Procedures
A/D overflow indicatorReference level setting
Figure 4- 3: Reference level setting and A/D overflow indicator
Spectrogram
8. Check the spectrogram display:
a. Press S/A > S/A with Spectrogram. Check that the spectrogram is
displayed on the lower side of the screen (see Figure 4--4).
RSA3408A Service Manual
Figure 4- 4: Spectrogram display
b. 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.
4- 7
Brief Procedures
Diagnostics
You can run the internal diagnostic program to check hardware states.
Table 4--2 shows the test items and their descriptions.
Table 4- 2: Internal diagnostic program
Menu itemDescriptionPossible failure
Temp SensorChecks that the temperature sensor works correctly. RF5 module
Data MemoryChecks that the acquisition memory works correctly. A40 board
The process is
graphically displayed
on the upper views.
Equipment
Required
PrerequisitesPower on the analyzer and allow a 20 minute warm-up before doing
None
this procedure.
1. Press CAL > Service... > Password.
2. Enter 270833 andthenpresstheENTER key on the numeric keypad.
3. Press the DIAG side key.
4. Select the diagnostic menu item to be executed.
You can press the All side key to run all the tests.
5. Check the result shown in the lower left view (“Pass” or “Fail”).
4- 8
Figure 4- 5: Diagnostic screen
RSA3408A Service Manual
Performance Tests
This section contains procedures for checking that the RSA3408A 8 GHz
Real-Time Spectrum Analyzer performs as warranted.
The procedures are arranged in five logical groupings:
HAuto Tests
HFrequency Checks
HNoise Sideband Checks
HAmplitude Checks
HSpurious Response Checks
They check all the characteristics that are designated as checked in Chapter 1,
Specifications. (The characteristics that are checked appear with the n symbol in
the Characteristics column in Chapter 1.) You can use the form at the end of this
section as a test record.
Read Performance Verification Procedures on page 4 --1 and 4--2. Also, if you are
not familiar with operating this analyzer, read the RSA3408A User Manual
before doing any of these procedures.
NOTE. These procedures extend the confidence level provided by the brief
procedures described on page 4--3. Perform the brief procedures first and then
perform the following procedures if desired.
RSA3408A Service Manual
4- 9
Performance Tests
Prerequisites
The tests in this section make up an extensive, valid confirmation of performance
and functionality when the following requirements are met:
HThe cabinet must be installed on the analyzer.
HThe instrument must have passed t he procedures under Brief Procedures
found on page 4--3.
HA signal-path compensation must have been done within the recommended
calibration interval and at a temperature within ±3 _C of the present
operating temperature. (If at the time you did the prerequisite Brief Proce-dures, the temperature was within the limits just stated, consider this
prerequisite met.)
HThe analyzer must have been last adjusted at an ambient temperature
between +20 _C and +30 _C, must have been operating for a warm-up
period of at least 20 minutes, and must be operating at an ambient temperature of between +10 _C and +40 _C.
HThe SG flatness/spurious floppy disk(s) (Item 16 in Table 4--3) must be
prepared. For the procedure to create or update the flatness and spurious
correction files, refer to Making Flatness Correction Files on page 5--6 and
Making Spurious Correction Files on page 5--13.
Equipment Required
These procedures use external, traceable signal sources to directly check
warranted characteristics. Table 4--3 shows the required equipment.
Table 4- 3: Test equipment
Item number and
description
1.Signal generatorFrequency range: 10 kHz to 3.5 GHz;
2.Signal generatorFrequency range: 10 MHz to 8 GHz;
3.Signal generatorFrequency range: 1 MHz to 8 GHz;
Minimum requirementsExamplePurpose
V ariable amplitude from --70 dBm to
+13 dBm into 50 Ω;
Accuracy: <±1 dB; Function: FM
Output level: --30 dBm to +10 dBm;
Accuracy: <±1dB
Output level: --30 dBm to +10 dBm;
Accuracy: <±1dB
Agilent 8648DChecking flatness in
baseband and RF1
Agilent 83712B with
option 1E1
Agilent E8257D with
option 1E1 (option UNX
recommended)
Checking flatness in
RF2 and RF3
Checking flatness in all bands
4- 10
RSA3408A Service Manual
Table 4- 3: Test equipment (Cont.)
Item number and
description
Performance Tests
PurposeExampleMinimum requirements
4.Signal generatorFrequency: 2 GHz; Output:
≥--10 dBm; Digital modulation: QPSK;
Symbol rate: 4.096 MS/s
5.Spectrum analyzerFrequency: >8 GHz;
Display scale fidelity: <±0.13 dB
7.RF power meter1MHzto8GHzAgilent E4418BAdjusting the signal generator
8.RF power sensor10 MHz to 8 GHz; RF Flatness: <3%;
Uncertainty of calibration factor data:
<2% (RSS)
9.Power combinerRange: 500 MHz to 2 GHz; Isolation:
>18 dB; Insertion loss: <1.0 dB
10. BNC cable50 Ω, 36 in, male-to-male BNC
connectors
11. N-N cable50 Ω, 36 in, male-to-male N
connectors
12. N-SMA cable
(Three required)
13. GPIB cable
(Two required)
14. RF attenuatorRatio: 10 dB; impedance 50 Ω;
15. TerminatorImpedance: 50 Ω; connectors: female
16. SG flatness/spurious
floppy disk (for each
signal generator used)
17. MouseUSBStandard accessaryFile operation
18. KeyboardUSBStandard accessaryFile operation
50 Ω, 36 in, male N-to-male SMA
connectors
2m, double-shieldedTektronix part number
Bandwidth: >8 GHz
BNC input, male BNC output
Created or updated with the
procedures described on pages 5--6
and 5--13
-- 1 0
/day;
Rohde & Schwarz SMIQ03B
Agilent E4438C
Agilent E4440AChecking level linearity
Agilent 53132A with
option 010
Agilent E4412AAdjusting the signal generator
Mini-Circuits ZAPD-21Checking intermodulation
Tektronix part number
012-1341-XX
012-0991-XX
Inmet 18N--10
Mini-Circuits BW--S10W2
Tektronix part number
011-0049-01
3.5 inch, 720 K or 1.44 MB,
DOS-compatible floppy disk
Checking intermodulation
distortion
Checking the reference output frequency accuracy
output level
output level
distortion
Signal interconnection
Signal interconnection
Signal interconnection
Software-based tests
Checking flatness
Signal termination for checking frequency accuracy
Storing flatness and spurious
correction data for the signal
generators (Items 1, 2, and 3)
RSA3408A Service Manual
4- 11
Performance Tests
Auto Tests
The auto tests use internal routines to verify specifications for the following
characteristics:
HBaseband flatness
HIF flatness
HRF flatness
HSpurious response
Use the service PV menu and procedure described below to set parameters and
perform the tests.
Service PV Menu
Selects the PV (performance verification) test items and bands. Access this menu
by pressing CAL > Service... > Password (270833) > PV (see Figure 4--6).
4- 12
Figure 4- 6: Auto test initial screen
The PV menu has the following controls:
PV Select. Selects the test items as shown in Table 4--4.
RSA3408A Service Manual
Performance Tests
Table 4- 4: Test item selection
PV Select
Test itemAllSpuriousOther
Baseband flatness✓✓
IF flatness✓✓
RF flatness✓✓
Spurious response✓✓
NOTE. It takes several hours to perform the spurious test.
All Band. Performs the tests in all bands (Baseband, RF1, RF2, and RF3).
Measurement bandwidth: 1 MHz to 8 GHz
BB. Performs the tests in the baseband.
Measurement bandwidth: 1 MHz to 40 MHz
RF1. P erforms t he tests in the RF1 band.
Measurement bandwidth: 40 MHz to 3.5 GHz
BB+RF1. P erforms the tests in the baseband and RF1 band.
Measurement bandwidth: 1 MHz to 3.5 GHz
RF2+RF3. Performs the tests i n the RF 2 and RF3 band.
Measurement bandwidth: 3.5 GHz to 8 GHz
RF1+RF2+RF3. Performs the tests in the RF1, RF 2, and R F3 band.
Measurement bandwidth: 40 MHz to 8 GHz
Config... Sets the signal generator manufacturer and the GPIB address.
HSG Type. Selects the manufacturer of the generator for the GPIB command
system: HP or Anritsu.
RSA3408A Service Manual
NOTE. The HP setting also supports Agilent and Rohde & Schwarz products.
HGPIB Address. Sets the GPIB address of the generator.
4- 13
Performance Tests
STOP. Select either of these two procedures, depending on the signal generator(s) you use:
HProcedure 1 below:
Uses one signal generator, Item 3 that covers all measurement bands
(Baseband, RF1, RF2, and RF3).
HProcedure 2 on page 4--16:
Uses two signal generators: Item 1 that covers the baseband and RF1 band
and Item 2 that covers the RF2 and RF3 bands.
Procedure 1
Performs the auto tests using one signal generator (Item 3) that covers all
measurement bands (Baseband, RF1, RF2, and RF3).
Equipment
Required
PrerequisitesRefer to page 4--10
One signal generator (Item 3)
One 50 Ω N-N coaxial cable (Item 11)
One 10 dB attenuator (Item 14)
One GPIB cable (Item 13)
One SG flatness floppy disk (Item 16)
1. Prepare for the test: See the following figure for the hookup.
RSA3408A
Signal generator
GPIB cable
4- 14
Output
10 dB attenuator
50 Ω N-N coaxial cable
RSA3408A Service Manual
Performance Tests
a. Power off the RSA3408A analyzer and the signal generator.
b. Connect the analyzer and the generator with a GPIB cable.
c.Connect the analyzer INPUT through a 10 dB attenuator followed by a
50 Ω N-N coaxial cable to the generator output.
d. Power on the analyzer and the generator.
e.Set t he GPIB address of the generator, ranging from 1 to 30.
f.Insert the SG flatness floppy disk (Item 16) for the generator to the
floppy disk drive of the analyzer.
2. Perform the self calibration: Press CAL > Calibrate All.
3. Enter the PV menu:
a. Press Service... > Password in the CAL menu.
b. Enter 270833 andthenpressENTER using the numeric keypad.
c.Press the PV side key.
d. Set the GPIB address of the generator:
HPress the Config... side key.
HPress the SG Type side key to select the manufacturer of the
generator for the GPIB command system: HP or Anritsu.
HPress the SG Address side key and set the generator address.
HPress the Cancel--Back side key.
4. Perform the tests in all bands:
Press the All Band side key to perform the tests.
NOTE. You can select the test items and bands as described in Service PV Menu
on page 4--12.
5. Check the test results:
Check the Pass/Fail results displayed on the lower left of the screen
(see Figure 4--7).
If any tests fail, go to When the Auto Tests Fail on page 4--19.
RSA3408A Service Manual
4- 15
Performance Tests
Procedure 2
Figure 4- 7: Performance test result display
6. Disconnect the test equipment:
a. Disconnect the cable from the analyzer input.
b. Turn off the analyzer and generators.
c.Disconnect the GPIB cables from all the ports.
Performs the auto tests using two signal generators, Item 1 that covers the
baseband and RF1 band and Item 2 that covers the RF2 and RF3 bands.
Equipment
Required
PrerequisitesRefer to page 4--10
Two signal generators (Items 1 and 2)
One 50 Ω N-N coaxial cable (Item 11)
One 10 dB attenuator (Item 14)
One GPIB cable (Item 13, two required)
One SG flatness floppy disk (Item 16, two required)
4- 16
RSA3408A Service Manual
1. Prepare for the test:
A
Hook up the equipment as shown in the following figure.
Signal generator (Item 1)Signal generator (Item 2)
GPIB cable
GPIB cable
Performance Tests
RSA3408
Output
50 Ω N-N coaxial cable
10 dB attenuator
a. Power off the analyzer and the signal generators.
b. Connect the analyzer and the generators with GPIB cables.
c.Connect the analyzer INPUT through a 10 dB attenuator followed by a
50 Ω N-N coaxial cable to the generator (Item 1) output.
d. Power on the analyzer and the generators.
e.Set t he GPIB address of the generators, ranging from 1 to 30.
Assign a unique address to each instrument.
f.Insert the SG flatness floppy disk (Item 16) for the generator (Item 1) to
the floppy disk drive of the analyzer.
2. Perform the self calibration: Press CAL > Calibrate All.
3. Enter the PV menu:
a. Press Service... > Password in the CAL menu.
b. Enter 270833 andthenpressENTER using the numeric keypad.
c.Press the PV side key.
d. Set the GPIB address of the generator:
HPress the Config... side key.
HPress the SG Type side key to select the manufacturer of the
generator (Item 1) for the GPIB command system: HP or Anritsu.
HPress the SG Address side key and set the generator address.
HPress the Cancel--Back (top) side key.
RSA3408A Service Manual
4- 17
Performance Tests
4. Perform the tests in the baseband and RF1 band:
Press the BB+RF1 side key to perform the tests.
5. Check the test results:
Check the pass/fail results displayed on the lower left of the screen
(see Figure 4--7 on page 4--16).
If the instrument fails any tests, go to When the Auto Tests Fail on
page 4--19.
6. Change the signal generator:
a. Disconnect the N--N cable from the signal generator (Item 1) output.
b. Connect the N--N cable to the signal generator (Item 2) output.
c.Set the GPIB address of the generator:
HPress the Config... side key.
HPress the SG Type side key to select the manufacturer of the
generator (Item 2) for the GPIB command system: HP or Anritsu.
HPress the GPIB Address side key and set the generator address.
HPress the Cancel--Back (top) side key.
7. Perform the tests in the RF2 and RF3 bands:
Press the RF2+RF3 side key to perform the tests.
8. Check the test results:
Check the pass/fail results displayed on the lower left of the screen
(see Figure 4--7 on page 4--16).
If the instrument fails any tests, go to When the Auto Tests Fail on
page 4--19.
9. Disconnect the test equipment:
a. Disconnect the N-N cable from the analyzer input.
b. Turn off the analyzer and generators.
c.Disconnect the GPIB cables from all the ports.
4- 18
RSA3408A Service Manual
Performance Tests
When the Auto Tests Fail
If any test results in Fail (see Figure 4--7 on page 4--16), perform calibration,
referring to Auto Calibration on page 5--20, and then perform the auto tests
again.
1. Perform the auto calibration for the failed test item as shown in Table 4--5.
Table 4- 5: Procedure for failed test item
Failed test itemProcedure
BB FlatnessPerform the baseband flatness calibration.
Use the All Band Calibration on page 5--25, but select BB in
the service Cal menu.
IF Flatness, RF1@400M
IF Flatness, RF1@1G
IF Flatness, RF1@2G
IF Flatness, RF1@3G
IF Flatness, RF2@5G
IF Flatness, RF3@6G
Perform the IF flatness (wide/IQ) calibration.
Refer to IF Flatness (Wide/Iq) Calibration on page 5--29 for the
procedure.
Perform the RF flatness calibration.
Refer to All Band Calibration on page 5--25 for the procedure.
You can select RF1, RF2+RF3,orRF1+RF2+RF3 with
Cal Select in the service Cal menu for the band in which the
error occurred.
Spurious, RF1
Spurious, RF2
Spurious, RF3
Perform the spurious calibration.
Use the All Band Calibration on page 5--25, but select
Spurious wit h Cal Select in the service Cal menu.
You can select RF1, RF2+RF3,orRF1+RF2+RF3 in the
service Cal menu for the band in which the error occurred.
2. Perform the auto tests again to check that the instrument passes.
If the instrument fails the spurious test again, go to the next section, FurtherSpurious Test.
Further Spurious Test. Performs spurious test at the specified frequency.
1. Connect a USB mouse (Item 17) and keyboard (Item 18) to the USB ports
on the side panel of the analyzer.
2. Press MEASURE (front panel) > Spurious PV.
3. Set the GPIB address of the signal generator:
a. Press the SG side key to select the manufacturer of the generator for the
GPIB command system: HP or Anritsu.
b. Press the GPIB Address side key and set the generator address.
RSA3408A Service Manual
4- 19
Performance Tests
4. Check the error log:
View the error log in the following location using the mouse and keyboard:
NOTE. For accessing Windows XP on the analyzer, refer to the RSA3408A User
Manual.
(RFx = RF1, RF2, or RF3, depending on the test frequency)
Below is an example of the spurious_RF1PV.log file:
Spurious PV, RF1
Begin 2005/04/28 16:34:03
1000MHz: 67.5kHz, --73.065dB
2000MHz: 55.3kHz, --76.142dB
End 2005/04/28 17:02:05
Center frequency
Spurious offset frequency
from the center frequency
Difference in level between carrier
at the center frequency and
spurious at the offset frequency
5. Set test frequency:
a. Press the Band side key to select the band in which the error occurred.
For example, if an error occurred at 1000 MHz, select RF1.
b. Press the Start side key and set the frequency at which the error
occurred. For example, if an error occurred at 1000 MHz, enter 1000.
c.Press the Stop side key and set the same frequency as in Start (in this
example, 1000) to perform the measurement at the error frequency.
6. Perform the test: Press the Measurement side key to run the test.
Check that the test passes on the right bottom of the screen.
7. Repeat steps 5 and 6 for all the frequencies listed in the log file.
4- 20
RSA3408A Service Manual
Frequency Checks
Performance Tests
These procedures check the frequency-related characteristics and are listed as
checked in Chapter 1, Specifications, Table 1--1 on page 1--2.
Check Frequency Readout
Accuracy
Equipment
Required
PrerequisitesRefer to page 4--10.
One signal generator (Item 2 or 3)
One 50 Ω N-N coaxial cable (Item 11)
1. Prepare for the test:
a. Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
b. Set the generator controls:
Frequency10 MHz................
Level--10 dBm....................
c.Hook up the signal generator:
Connect the generator output through a 50 Ω N-N coaxial cable to the
analyzer INPUT. See the following figure.
RSA3408A
RSA3408A Service Manual
Signal generator
Output
50 Ω N-N coaxial cable
4- 21
Performance Tests
2. Check frequency accuracy in the baseband:
a. Modify the analyzer default settings:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 10 MHz using the numeric keypad.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 1 MHz using the general purpose knob.
b. Measure peak frequency:
HPress the PEAK key to place the marker on the signal peak.
HRead the m arker readout. Confirm that the value is
10 MHz 1kHz.
3. Check frequency accuracy in the RF1 band:
a. Modify the generator control:
Frequency2 GHz................
b. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 2 GHz using the numeric keypad.
c.Measure peak frequency:
HPress the PEAK key to place the marker on the signal peak.
HRead the m arker readout. Confirm that the value is
2 GHz 1.4 kHz.
4- 22
RSA3408A Service Manual
4. Check frequency accuracy in the RF2 band:
a. Modify the generator control:
Frequency5 GHz................
b. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 5 GHz using the numeric keypad.
c.Measure peak frequency:
HPress the PEAK key to place the marker on the signal peak.
HRead the m arker readout. Confirm that the value is
5 GHz 2.0 kHz.
5. Check frequency accuracy in the RF3 band:
Performance Tests
a. Modify the generator control:
Frequency7 GHz................
b. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 7 GHz using the numeric keypad.
c.Measure peak frequency:
HPress the PEAK key to place the marker on the signal peak.
HRead the m arker readout. Confirm that the value is
7 GHz 2.4 kHz.
6. Disconnect the test equipment:
Disconnect the cable at the analyzer input.
RSA3408A Service Manual
4- 23
Performance Tests
Check 10 MHz Reference
Output Accuracy
Equipment
Required
PrerequisitesRefer to page 4--10.
One frequency counter (Item 6)
One 50 Ω BNC coaxial cable (Item 10)
One 50 Ω terminator (Item 15)
The frequency counter must have been operating for a warm-up period
of at least 24 hours.
1. Prepare for the test:
a. Hook up the frequency counter:
Connect REF OUT on the rear panel of the analyzer through a 50 Ω
precision coaxial cable and a 50 Ω precision terminator to Channel 1 of
the counter. See the following figure.
Frequency counter
RSA3408A (rear)
REF OUT
CH1 input
50 Ω terminator
50 Ω BNC coaxial cable
b. Set the counter controls:
FunctionFrequency 1.................
Gate time2 s................
2. Check the frequency:
Check that the frequency counter reads 10 MHz 2.0 Hz.
3. Disconnect the hookup:Disconnect the cable at REF OUT.
4- 24
RSA3408A Service Manual
Noise Sideband Checks
Performance Tests
These procedures check the noise sideband-related characteristics and are listed
as checked in Chapter 1, Specifications, Table 1--2 on page 1--3.
Check Noise Sideband
Equipment
Required
PrerequisitesRefer to page 4--10.
1. Prepare for the test:
a. Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
b. Modify the default settings:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 1 GHz using the numeric keypad.
HPress the AMPLITUDE key on the front panel.
HPress the RF Atten/Mixer side key to select Mixer.
HThe Mixer Level menu item is selected by default.
Set the level to --10 dBm.
One signal generator (Item 4)
One 50 Ω N-N coaxial cable (Item 11)
RSA3408A Service Manual
HPress TRACE/AVG > Trace 1 Type... > Average.
HPress the Number Of Averages side key and set the value to 50
using the general purpose knob.
c.Set the generator controls:
Frequency1000 MHz................
Amplitude0 dBm................
RF outputOn................
d. Hook up the signal generator:
Connect the generator output through a 50 Ω N-N coaxial cable to the
analyzer INPUT. See the following figure.
4- 25
Performance Tests
Signal generator
Output
50 Ω N --N coaxial cable
RSA3408A
2. Check phase noise for a span of 50 kHz:
a. Modify the analyzer controls:
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default. Set the span to 50 kHz
using the general purpose knob or the numeric keypad.
b. Perform the C/N (Carrier-to-Noise ratio) measurement:
HPress MEASURE > C/N > MEAS SETUP.
HPress the Offset Frequency side key and set the value to 10 kHz
using the numeric keypad.
HPress the Carrier Bandwidth side key and set the value to 5 kHz
using the numeric keypad.
HPress the Noise Bandwidth side key and set the value to 1 kHz
using the numeric keypad.
c.Check against limits:
Read the phase noise (C/No) at the bottom of the screen.
Confirm that the value is 110 dB/Hz or more.
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RSA3408A Service Manual
3. Check phase noise for a span of 500 kHz:
a. Modify the analyzer controls:
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default. Set the span to 500 kHz
using the general purpose knob or the numeric keypad.
b. Perform the C/N measurement:
HSelect MEASURE > C/N > MEAS SETUP.
HPress the Offset Frequency side key and set the value to 100 kHz
using the numeric keypad.
HPress the Carrier Bandwidth side key and set the value to 50 kHz
using the numeric keypad.
HPress the Noise Bandwidth side key and set the value to 10 kHz
using the numeric keypad.
Performance Tests
c.Check against limits:
Read the phase noise (C/No) at the bottom of the screen.
Confirm that the value is 112 dB/Hz or more.
4. Check phase noise for a span of 5 MHz:
a. Modify the analyzer controls:
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default. Set the span to 5 MHz
using the general purpose knob or the numeric keypad.
b. Perform the C/N measurement:
HSelect MEASURE > C/N > MEAS SETUP.
HPress the Offset Frequency side key and set the value to 1 MHz
using the numeric keypad.
HPress the Carrier Bandwidth side key and set the value to 300 kHz
using the numeric keypad.
HPress the Noise Bandwidth side key and set the value to 100 kHz
using the numeric keypad.
RSA3408A Service Manual
c.Check against limits:
Read the phase noise (C/No) at the bottom of the screen.
Confirm that the value is 132 dB/Hz or more.
5. Disconnect the test equipment: Disconnect the cable at the analyzer input.
4- 27
Performance Tests
Amplitude Checks
These procedures check the amplitude-related characteristics and are listed as
checked in Chapter 1, Specifications, Table 1--4 on page 1--5.
Check Absolute
Amplitude Accuracy
Equipment
Required
PrerequisitesRefer to page 4--10.
One signal generator (Item 1)
One power meter (Item 7)
One power sensor (Item 8)
One 50 Ω N-N coaxial cables (Item 11)
1. Set up the power meter and sensor:
NOTE. Store the power sensor correction factors in the power meter, if you have
not yet done so.
a. Connect the power meter and the power sensor. See the following figure.
Power meter
Power sensor
Sensor input
4- 28
b. Warm up the power meter and sensor for more than 20 minutes.
c.Press ZERO on the power meter.
d. Connect the RF input of the power sensor to the power reference output
of the power meter. See Figure 4--8 on page 4--29.
e.Turn on POWER REF and execute the calibration.
f.Disconnect the RF input of the power sensor from the reference output
of the power meter.
RSA3408A Service Manual
Power meter
Power reference output
Figure 4- 8: Hookup for calibrating the power sensor
Baseband Test.
2. Set the signal generator output:
a. Hook up the instruments:
Connect the signal generator (Item 1) output through a 50 Ω N-N coaxial
cable to the power sensor input. See Figure 4--9.
Performance Tests
Signal generator
Power meter
Output
Power sensor
Figure 4- 9: Hookup for setting the signal generator output
b. Set the signal generator controls:
Frequency25 MHz................
Level--10 dBm....................
c.Set the power meter control:
Frequency25 MHz................
d. Adjust the output level of the signal generator so that the power meter
reads --10 dBm 0.05 dBm.
RSA3408A Service Manual
e.Disconnect the cable from the power sensor input.
4- 29
Performance Tests
3. Prepare for the test:
a. Hook up the instruments:
Connect the signal generator output through a 50 Ω N-N coaxial cable to
the RSA3408A INPUT. See Figure 4--10.
RSA3408A
Signal generator
Output
50 Ω N-N coaxial cable
Figure 4- 10: Hookup for checking the a bsolute amplitude accuracy
b. Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
c.Modify the default settings:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 25 MHz using the numeric keypad.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 10 MHz using the general purpose knob.
d. Calibrate the analyzer gain:
HPress CAL > Calibrate Gain.
HPress AMPLITUDE > Auto Level.
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RSA3408A Service Manual
Performance Tests
4. Check the amplitude:
a. Press the PEAK key on the front panel to place the marker on the
signal peak.
b. Check that the marker readout is within --10 dBm 0.3 dB.
5. Disconnect the hookup:
Disconnect the cable at the analyzer input.
RF Test.
6. Modify the signal generator output:
a. Hook up the test equipment:
Connect the signal generator output through a 50 Ω N-N coaxial cable to
the power sensor input. See Figure 4-- 9 on page 4--29.
b. Modify the signal generator controls:
Frequency100 MHz................
Level--20 dBm....................
c.Modify the power meter control:
Frequency100 MHz................
d. Adjust the output level of the signal generator so that the power meter
reads --20 dBm 0.05 dBm.
e.Disconnect the cable from the power sensor input.
7. Modify the test hookup and preset the i nstrument controls:
a. Hook up the instruments:
Connect the signal generator output through a 50 Ω N-N coaxial cable to
the RSA3408A INPUT. See Figure 4--10 on page 4--30.
b. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 100 MHz using the numeric keypad.
HPress the AMPLITUDE key on the front panel.
RSA3408A Service Manual
HPress the RF Atten/Mixer side key to select RF Att.
HThe RF Att menu item is selected by default.
Set the attenuation to 0 dB.
4- 31
Performance Tests
c.Calibrate the analyzer gain:
HPress CAL > Calibrate Gain.
HPress Amplitude > Auto Level.
8. Check the amplitude:
a. Press the PEAK key on the front panel to place the marker on the
signal peak.
b. Check that the marker readout is within --20 dBm 0.5 dB.
9. Disconnect the test equipment:
Disconnect the cable at the analyzer input.
4- 32
RSA3408A Service Manual
Performance Tests
Check Input Attenuator
Setting Uncertainty
Equipment
Required
PrerequisitesRefer to page 4--10.
One signal generator (Item 1)
One 50 Ω N-N coaxial cables (Item 11)
1. Prepare for the test:
a. Set the generator controls:
Frequency100 MHz................
Amplitude--25 dBm................
RF outputOn................
b. Hook up the generator:
Connect the generator output through a 50 Ω N-N coaxial cable to the
analyzer INPUT. See the following figure.
Signal generator
RSA3408A
Output
50 Ω N-N coaxial cable
c.Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
RSA3408A Service Manual
4- 33
Performance Tests
d. Modify the default settings:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 100 MHz using the numeric keypad.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 10 MHz using the general purpose knob.
HPress the AMPLITUDE key on the front panel.
HThe Ref Level menu item is selected by default.
Set the reference level to --20 dBm using the general purpose knob.
HPress the RF Atten/Mixer side key to select RF Att.
HThe RF Att menu item is selected by default. Set the attenuation to
0 dB using the numeric keypad or the general purpose knob.
2. Measure the reference amplitude at 0 dB attenuation:
a. Press the PEAK key on the front panel to place the marker on the
signal peak.
b. Record the peak amplitude at the marker readout as the reference value.
(Let the value be P
)
0.
3. Check the amplitude for the attenuation from 5 to 30 dB:
a. Press the RF Att side key and set the attenuation (initially 5 dB).
b. Press the PEAK key on the front panel to place the marker on the
signal peak.
c.Record the peak amplitude at the marker readout. (Let the value be P
d. Check that the error (PX-- P0) is within 0.2 dB .
e.Repeat substeps 3a through d for attenuation from 5 to 30 dB in 5 dB
steps.
4. Modify the generator controls:
Amplitude--5 dBm................
.)
X
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RSA3408A Service Manual
Performance Tests
5. Modify the analyzer controls:
a. Press the AMPLITUDE key on the front panel.
b. The Ref Level menu item is selected by default.
Set the reference level to 0 dBm using the general purpose knob.
c.Make sure that RF Att is s et to 30 dB.
6. Measure the reference amplitude at 30 dB attenuation:
a. Press the PEAK key on the front panel to place the marker on the
signal peak.
b. Record the peak amplitude at the marker readout as the reference value.
(Let the value be P
)
1.
7. Check the amplitude for attenuation from 35 to 55 dB:
a. Press the RF Att side key and set the attenuation (initially 35 dB).
b. Press the PEAK key on the front panel to place the marker on the
signal peak.
c.Record the peak amplitude at the marker readout. (Let the value be P
d. Check that the error (P
-- P1) is within 0.2 dB .
X
e.Repeat substeps 7a through d forattenuationfrom35to55dBin5dB
steps.
8. Disconnect the test equipment:
Disconnect the cable at the analyzer input.
.)
X
RSA3408A Service Manual
4- 35
Performance Tests
Check Level Linearity
Equipment
Required
PrerequisitesRefer to page 4--10.
One signal generator (Item 1)
One spectrum analyzer (Item 5)
One power meter (Item 7)
One power sensor (Item 8)
One 50 Ω N-N coaxial cable (Item 11)
1. Set up the power meter and sensor:
Do step 1 on page 4--28 to set up the power meter and sensor.
2. Set the signal generator output:
a. Hook up the instruments:
Connect the signal generator (Item 1) output through a 50 Ω N-N coaxial
cable to the power sensor input. See the figure below.
Signal generator
Power meter
Output
Power sensor
b. Set the signal generator controls:
Frequency100 MHz................
Level+10 dBm....................
4- 36
RSA3408A Service Manual
Performance Tests
3. Determine the reference power in +10 to --30 dBm:
a. Measure the power and record it as Pr0.
b. Set the signal generator amplitude to 0 to --30 dBm in 10 dB steps and
measure the power as Pr1 to 4, respectively.
Signal generator amplitudeReference power
+10 dBmPr0
0dBmPr1
--10 dBmPr2
--20 dBmPr3
--30 dBmPr4
4. Modify the hookup:
a. Connect the generator output through a 50 Ω N-N coaxial cable to the
spectrum analyzer (Item 5) input. See the following figure.
Spectrum analyzer
Signal generator
Output
50 Ω N-N coaxial cable
b. Set the signal generator control:
Amplitude--30 dBm................
c.Set the spectrum analyzer controls:
Measurement modeSA mode........
Reference level--20 dBm............
Center frequency100 MHz..........
Span1 MHz....................
RF attenuation10 dB............
RBWAuto....................
RSA3408A Service Manual
4- 37
Performance Tests
5. Set the reference offset:
a. Set the spectrum analyzer control:
A verage10..................
b. Measure the peak power Ppr using the maker peak.
c.Modify the spectrum analyzer control:
Reference offsetPr4 -- Ppr...........
6. Determine the reference power in --40 dBm:
a. Set the signal generator amplitude to --40 dBm to measure the power
as Pr5.
Signal generator amplitudeReference power
--40 dBmPr5
b. Disconnect the cable from the spectrum analyzer.
7. Modify the hookup:
a. Connect the signal generator output to the RSA3408A analyzer input.
See the following figure.
RSA3408A
Signal generator
Output
50 Ω N-N coaxial cable
b. Set the signal generator control:
Amplitude+10 dBm................
4- 38
RSA3408A Service Manual
Performance Tests
c.Modify the RSA3408A analyzer controls:
Center frequency100 MHz..........
Span5 MHz....................
Reference level10 dBm............
RF attenuation20dB............
8. Measure the power:
a. Measure the power and record it as Pm0.
b. Set the signal generator amplitude to 0 to --40 dBm in 10 dB steps to
measure the power as Pm1 to 5.
c.Get the level linearity Pfx (x = 1 to 5) as:
Pfx = (Pmx -- Pm0) -- (Prx -- Pr0)
Table 4- 6: Level linearity test result
Signal generator
amplitude
+10 dBmPr0Pm0--
0dBmPr1Pm1Pf1 = (Pm1 -- Pm0) -- (Pr1 -- Pr0)
--10 dBmPr2Pm2Pf2 = (Pm2 -- Pm0) -- (Pr2 -- Pr0)
--20 dBmPr3Pm3Pf3 = (Pm3 -- Pm0) -- (Pr3 -- Pr0)
--30 dBmPr4Pm4Pf4 = (Pm4 -- Pm0) -- (Pr4 -- Pr0)
--40 dBmPr5Pm5Pf5 = (Pm5 -- Pm0) -- (Pr5 -- Pr0)
Reference
power
Measured
power
Level linearity
9. Disconnect the test equipment:
Disconnect the cable at the analyzer input.
RSA3408A Service Manual
4- 39
Performance Tests
Spurious Response Checks
These procedures check the spurious-related characteristics and are listed as
checked in Chapter 1, Specifications, Table 1--5 on page 1--6.
Check 3rdOrder
Intermodulation Distortion
Equipment
Required
PrerequisitesRefer to page 4--10.
Two signal generators (Item 2 (or 3) and Item 4)
One power combiner (Item 9)
Three 50 Ω N-SMA coaxial cables (Item 12)
1. Prepare for the test:
a. Connect each generator output through a 50 Ω N-SMA coaxial cable to
each power combiner input. See the following figure.
RSA3408A
Signal generator
Output
N-SMA cable
Signal generator
4- 40
Power
combiner
N-SMA cable
Output
b. Connect the power combiner output through a 50 Ω N-SMA coaxial
cable to the analyzer INPUT.
RSA3408A Service Manual
Performance Tests
c.Set the signal generator (Item 2) controls:
Frequency1999.85 MHz................
Level0 dBm....................
ALC BW100 Hz................
d. Set the signal generator (Item 4) controls:
Frequency2000.15 MHz................
Level0 dBm....................
ALC BW100 Hz................
e.Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
f.Modify the default controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 2 GHz using the numeric keypad.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 1 MHz using the general purpose knob.
HPress the AMPLITUDE key on the front panel.
HThe Ref Level menu item is selected by default.
Set the level to 5 dBm using the general purpose knob.
HPress the RF Atten/Mixer side key to select Rf Att.
HPress the RBW/FFT key on the front panel.
HPress the RBW/FFT side key to select Man.
HPress the Extended Resolution side key to select On.
HPress the RBW side key and set the RBW to 2 kHz.
HPress TRACE/AVG > Trace 1 Type... > Average.
HPress the Number Of Averages side key and set the value to 50
using the general purpose knob.
RSA3408A Service Manual
HPress the MARKER SETUP key.
HPress the Ma
rkers side key to select Delta.
4- 41
Performance Tests
g. Modify the generator output level:
HPress MARKERS: A or " to place the marker on t he signal of
1999.85 MHz.
HAdjust the generator (Item 2) output level so that the signal level is
--10 dBm.
HPress MARKERS: A or " to place the marker on t he signal of
2000.15 MHz.
HAdjust the generator (Item 4) output level so that the signal level is
--10 dBm.
2. Check the amplitude for the attenuation of 10 to 20 dB:
a. Modify the analyzer controls:
HPress the AMPLITUDE key on the front panel.
HPress the RF Att menu item and set the attenuation using the general
purpose knob (initially 10 dB).
b. Measure the amplitude for the signals of 1999.55 MHz and
2000.45 MHz:
HPress the MARKER SETUP key.
HPress the Select Marker side key to select 1.
HPlace the first marker at the signal of 1999.55 MHz using the
MARKERS: A or " key.
HPress the Select Marker side key to select 2.
HPlace the second marker at the signal of 2000.45 MHz using the
MARKERS: A or " key.
c.Check against limits: Read the first and the second marker readouts.
Write down t he larger value.
d. Repeat substeps 2a through c forattenuationfrom10to20dBin5dB
steps to find the lowest distortion value.
3. Check against limits:
Confirm that the lowest value meets the requirement of --78 dBc.
4. Disconnect the test equipment:
Disconnect the cable at the analyzer input.
4- 42
RSA3408A Service Manual
Performance Tests
Check Displayed Average
Noise Level
Equipment
Required
PrerequisitesRefer to page 4--10.
None
1. Prepare for the test:
a. Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
RSA3408A
b. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 10 MHz using the general purpose knob.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 1 MHz using the general purpose knob.
HPress the AMPLITUDE key on the front panel.
HThe Ref Level menu item is selected by default.
Set the level to --30 dBm using the general purpose knob.
HPress the RBW/FFT key on the front panel.
HPress the RBW/FFT side key to select Man.
HThe RBW menu item is selected by default.
Set the value to 10 kHz using the general purpose knob.
RSA3408A Service Manual
4- 43
Performance Tests
HPress TRACE/AVG > Trace 1 Type... > Average.
HPress the Number Of Averages side key and set the value to 50.
HPress MEASURE > Channel Power > MEAS SETUP.
HPress the Channel Bandwidth side key and set the value to 1 MHz
using the general purpose knob.
2. Check noise in the baseband:
Read the measurement result of Density at the bottom of the screen.
Check that the value is --151 dBm/Hz or less.
3. Check noise at 2 GHz in the RF1 band:
a. Modify the analyzer control:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 2 GHz using the general purpose knob.
HPress the AMPLITUDE key on the front panel.
HThe Ref Level menu item is selected by default.
Set the level to --50 dBm using the general purpose knob.
HPress the RF Atten/Mixer side key to select RF Att.
HThe RF Att menu item is selected by default.
Set the attenuation to 0 dB using the general purpose knob.
b. Check against limits:
Read the measurement result of Density at the bottom of the screen.
Check that the value is --150 dBm/Hz or less.
4. Check noise at 3 GHz in the RF1 band:
a. Modify the analyzer control:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 3 GHz using the general purpose knob.
b. Check against limits:
Read the measurement result of Density at the bottom of the screen.
Check that the value is --150 dBm/Hz or less.
4- 44
RSA3408A Service Manual
5. Check noise at 7 GHz in the RF3 band:
a. Modify the analyzer control:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 7 GHz using the general purpose knob.
b. Check against limits:
Read the measurement result of Density at the bottom of the screen.
Check that the value is --142 dBm/Hz or less.
Performance Tests
RSA3408A Service Manual
4- 45
Performance Tests
Check Residual Response
Equipment
Required
PrerequisitesRefer to page 4--10.
None
1. Prepare for the test:
a. Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
RSA3408A
b. Modify the default settings:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 20 MHz using the general purpose knob.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 40 MHz using the general purpose knob.
HPress the AMPLITUDE key on the front panel.
HThe Ref Level menu item is selected by default.
Set the level to --30 dBm using the general purpose knob.
HPress the RBW/FFT key on the front panel.
HPress the RBW/FFT side key to select Man.
HThe RBW menu item is selected by default.
Set the RBW to 100 kHz using the general purpose knob.
HPress TRACE/AVG > Trace 1 Type... > Average.
HPress the Number Of Averages side key and set the value to 50
using the general purpose knob.
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RSA3408A Service Manual
2. Check residual response in the baseband:
a. Measure residual response:
HPress the LINES key on the front panel.
HPress the Show Line side key to select Vertical.
HPress the Number Of Line key to select 1.
HThe Line1 menu item is selected by default.
Set the value to 1 MHz using the numeric keypad.
HPress the Show Line side key to select Horizontal.
HPress the Number Of Line key to select 1.
HThe Line1 menu item is selected by default.
Set the value to --93 dBm using the numeric keypad.
b. Check against limits:
Confirm that the residual signal level is --93 dBm or less at 1 MHz or
more.
Performance Tests
3. Check residual response in the RF1 band:
a. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 2 GHz using the numeric keypad.
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 3 GHz using the numeric keypad.
b. Measure residual response:
HPress the LINES key.
HPress the Show Line side key to select Horizontal.
HPress the Number Of Line key to select 1.
HThe Line1 menu item is selected by default.
Set the value to --90 dBm using the numeric keypad.
c.Check against limits:
Confirm that the residual signal level is --90 dBm or less.
RSA3408A Service Manual
4- 47
Performance Tests
4. Check residual response in the RF2 band:
a. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 5 GHz using the numeric keypad.
b. Measure residual response:
Press the PEAK key to place the marker at the peak on the noise floor.
c.Check against limits:
Read the marker readout. Confirm that the residual signal level is
--85 dBm or less within the whole bandwidth.
5. Check residual response in the RF3 band:
a. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default.
Set the frequency to 6.5 GHz using the numeric keypad.
b. Measure residual response:
Press the PEAK key to place the marker at the peak on the noise floor.
c.Check against limits:
Read the marker readout. Confirm that the residual signal level is
--85 dBm or less within the whole bandwidth.
4- 48
RSA3408A Service Manual
Performance Tests
Check Spurious Response
Equipment
Required
PrerequisitesRefer to page 4--10.
One signal generator (Item 2 or 3)
One 50 Ω N-N coaxial cable (Item 11)
1. Prepare for the test:
a. Initialize the analyzer:
HPress the SYSTEM key on the front panel.
HPress the Reset All to Factory Defaults side key.
b. Modify the default controls:
HPress the SPAN key on the front panel.
HThe Span menu item is selected by default.
Set the span to 10 MHz using the general purpose knob.
HPress the RBW/FFT key on the front panel.
HPress the RBW/FFT side key to select Man.
HThe RBW menu item is selected by default.
Set the value to 50 kHz using the general purpose knob.
HPress TRACE/AVG > Trace 1 Type... > Average.
HPress the Number Of Averages side key and set the value to 50.
HPress the MARKER SETUP key.
HPress the Markers side key to select Delta.
c.Set the generator controls:
Level--5 dBm....................
d. Hook up the signal generator:
Connect the generator output through a 50 Ω N-N coaxial cable to the
analyzer INPUT. See the following figure.
RSA3408A Service Manual
4- 49
Performance Tests
RSA3408A
Signal generator
Output
50 Ω N-N coaxial cable
2. Check spurious response:
a. Modify the generator controls:
Set the generator output frequency to the value as shown in Table 4--7
(initially 25 MHz).
b. Modify the analyzer controls:
HPress the FREQUENCY/CHANNEL key on the front panel.
HThe Center Freq menu item is selected by default. Set the frequency
to the same value as the generator output using the numeric keypad.
c.Measure the amplitude:
HPress the MARKER SETUP key on the front panel.
HPress the Select Marker side key to select 1.
HPress the PEAK key and then the MARKERS: B (marker down)
key once to place the first marker at the peak on the noise floor.
HPress the Select Marker side key to select 2.
HPress the PEAK keytoplaceMarker2onthesignalpeak.
HRead the delta marker readout (Δ1--2) on the screen. Check that the
components other than the carrier meet the requirements shown in
Table 4--7 (initially --73 dBc).
4- 50
RSA3408A Service Manual
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