R&S SGS100A Service Manual
R&S®SGS100A
SGMA RF Source
Service Manual
Service Manual
Test and Measurement
1173.9111.02 – 06
This Service Manual provides servicing and maintenance procedures for the R&S® SGS100A
© 2015 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Munich, Germany
Phone: +49 89 41 29 – 0
Fax: +49 89 41 29 12 164
E-mail: [email protected]
Internet: http://www.rohde-schwarz.com
Printed in Germany – Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
The following abbreviations are used throughout this manual:
R&S®SGS100A is abbreviated as R&S SGS100A.
Basic Safety Instructions
Always read through and comply with the following safety instructions!
All plants and locations of the Rohde & Schwarz group of companies make every effort to keep the safety
standards of our products up to date and to offer our customers the highest possible degree of safety. Our
products and the auxiliary equipment they require are designed, built and tested in accordance with the
safety standards that apply in each case. Compliance with these standards is continuously monitored by
our quality assurance system. The product described here has been designed, built and tested in
accordance with the EC Certificate of Conformity and has left the manufacturer’s plant in a condition fully
complying with safety standards. To maintain this condition and to ensure safe operation, you must
observe all instructions and warnings provided in this manual. If you have any questions regarding these
safety instructions, the Rohde & Schwarz group of companies will be happy to answer them.
Furthermore, it is your responsibility to use the product in an appropriate manner. This product is designed
for use solely in industrial and laboratory environments or, if expressly permitted, also in the field and must
not be used in any way that may cause personal injury or property damage. You are responsible if the
product is used for any purpose other than its designated purpose or in disregard of the manufacturer's
instructions. The manufacturer shall assume no responsibility for such use of the product.
The product is used for its designated purpose if it is used in accordance with its product documentation
and within its performance limits (see data sheet, documentation, the following safety instructions). Using
the product requires technical skills and, in some cases, a basic knowledge of English. It is therefore
essential that only skilled and specialized staff or thoroughly trained personnel with the required skills be
allowed to use the product. If personal safety gear is required for using Rohde & Schwarz products, this
will be indicated at the appropriate place in the product documentation. Keep the basic safety instructions
and the product documentation in a safe place and pass them on to the subsequent users.
Observing the safety instructions will help prevent personal injury or damage of any kind caused by
dangerous situations. Therefore, carefully read through and adhere to the following safety instructions
before and when using the product. It is also absolutely essential to observe the additional safety
instructions on personal safety, for example, that appear in relevant parts of the product documentation. In
these safety instructions, the word "product" refers to all merchandise sold and distributed by the Rohde &
Schwarz group of companies, including instruments, systems and all accessories. For product-specific
information, see the data sheet and the product documentation.
Safety labels on products
The following safety labels are used on products to warn against risks and dangers.
Symbol
Meaning
Notice, general danger location
Symbol
Meaning
ON/OFF Power
Observe product documentation
Caution when handling heavy equipment
Standby indication
Danger of electric shock
Direct current (DC)
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Basic Safety Instructions
Symbol
Meaning
Symbol
Meaning
Caution ! Hot surface
Alternating current (AC)
Protective conductor terminal
To identify any terminal which is intended for
connection to an external conductor for
protection against electric shock in case of a
fault, or the terminal of a protective earth
Direct/alternating current (DC/AC)
Earth (Ground)
Class II Equipment
to identify equipment meeting the safety
requirements specified for Class II equipment
(device protected by double or reinforced
insulation)
Frame or chassis Ground terminal
EU labeling for batteries and accumulators
For additional information, see section "Waste
disposal/Environmental protection", item 1.
Be careful when handling electrostatic sensitive
devices
EU labeling for separate collection of electrical
and electronic devices
For additional information, see section "Waste
disposal/Environmental protection", item 2.
Warning! Laser radiation
For additional information, see section
"Operation", item 7.
Signal words and their meaning
The following signal words are used in the product documentation in order to warn the reader about risks
and dangers.
Indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
Indicates information considered important, but not hazard-related, e.g.
messages relating to property damage.
In the product documentation, the word ATTENTION is used synonymously.
These signal words are in accordance with the standard definition for civil applications in the European
Economic Area. Definitions that deviate from the standard definition may also exist in other economic
areas or military applications. It is therefore essential to make sure that the signal words described here
are always used only in connection with the related product documentation and the related product. The
use of signal words in connection with unrelated products or documentation can result in misinterpretation
and in personal injury or material damage.
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Basic Safety Instructions
Operating states and operating positions
The product may be operated only under the operating conditions and in the positions specified by the
manufacturer, without the product's ventilation being obstructed. If the manufacturer's specifications are
not observed, this can result in electric shock, fire and/or serious personal injury or death. Applicable local
or national safety regulations and rules for the prevention of accidents must be observed in all work
performed.
1. Unless otherwise specified, the following requirements apply to Rohde & Schwarz products:
predefined operating position is always with the housing floor facing down, IP protection 2X, use only
indoors, max. operating altitude 2000 m above sea level, max. transport altitude 4500 m above sea
level. A tolerance of ±10 % shall apply to the nominal voltage and ±5 % to the nominal frequency,
overvoltage category 2, pollution degree 2.
2. Do not place the product on surfaces, vehicles, cabinets or tables that for reasons of weight or stability
are unsuitable for this purpose. Always follow the manufacturer's installation instructions when
installing the product and fastening it to objects or structures (e.g. walls and shelves). An installation
that is not carried out as described in the product documentation could result in personal injury or
even death.
3. Do not place the product on heat-generating devices such as radiators or fan heaters. The ambient
temperature must not exceed the maximum temperature specified in the product documentation or in
the data sheet. Product overheating can cause electric shock, fire and/or serious personal injury or
even death.
Electrical safety
If the information on electrical safety is not observed either at all or to the extent necessary, electric shock,
fire and/or serious personal injury or death may occur.
1. Prior to switching on the product, always ensure that the nominal voltage setting on the product
matches the nominal voltage of the mains-supply network. If a different voltage is to be set, the power
fuse of the product may have to be changed accordingly.
2. In the case of products of safety class I with movable power cord and connector, operation is
permitted only on sockets with a protective conductor contact and protective conductor.
3. Intentionally breaking the protective conductor either in the feed line or in the product itself is not
permitted. Doing so can result in the danger of an electric shock from the product. If extension cords
or connector strips are implemented, they must be checked on a regular basis to ensure that they are
safe to use.
4. If there is no power switch for disconnecting the product from the mains, or if the power switch is not
suitable for this purpose, use the plug of the connecting cable to disconnect the product from the
mains. In such cases, always ensure that the power plug is easily reachable and accessible at all
times. For example, if the power plug is the disconnecting device, the length of the connecting cable
must not exceed 3 m. Functional or electronic switches are not suitable for providing disconnection
from the AC supply network. If products without power switches are integrated into racks or systems,
the disconnecting device must be provided at the system level.
5. Never use the product if the power cable is damaged. Check the power cables on a regular basis to
ensure that they are in proper operating condition. By taking appropriate safety measures and
carefully laying the power cable, ensure that the cable cannot be damaged and that no one can be
hurt by, for example, tripping over the cable or suffering an electric shock.
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Basic Safety Instructions
6. The product may be operated only from TN/TT supply networks fuse-protected with max. 16 A (higher
fuse only after consulting with the Rohde & Schwarz group of companies).
7. Do not insert the plug into sockets that are dusty or dirty. Insert the plug firmly and all the way into the
socket provided for this purpose. Otherwise, sparks that result in fire and/or injuries may occur.
8. Do not overload any sockets, extension cords or connector strips; doing so can cause fire or electric
shocks.
9. For measurements in circuits with voltages Vrms > 30 V, suitable measures (e.g. appropriate
measuring equipment, fuse protection, current limiting, electrical separation, insulation) should be
taken to avoid any hazards.
10. Ensure that the connections with information technology equipment, e.g. PCs or other industrial
computers, comply with the IEC 60950-1 / EN 60950-1 or IEC 61010-1 / EN 61010-1 standards that
apply in each case.
11. Unless expressly permitted, never remove the cover or any part of the housing while the product is in
operation. Doing so will expose circuits and components and can lead to injuries, fire or damage to the
product.
12. If a product is to be permanently installed, the connection between the protective conductor terminal
on site and the product's protective conductor must be made first before any other connection is
made. The product may be installed and connected only by a licensed electrician.
13. For permanently installed equipment without built-in fuses, circuit breakers or similar protective
devices, the supply circuit must be fuse-protected in such a way that anyone who has access to the
product, as well as the product itself, is adequately protected from injury or damage.
14. Use suitable overvoltage protection to ensure that no overvoltage (such as that caused by a bolt of
lightning) can reach the product. Otherwise, the person operating the product will be exposed to the
danger of an electric shock.
15. Any object that is not designed to be placed in the openings of the housing must not be used for this
purpose. Doing so can cause short circuits inside the product and/or electric shocks, fire or injuries.
16. Unless specified otherwise, products are not liquid-proof (see also section "Operating states and
operating positions", item 1). Therefore, the equipment must be protected against penetration by
liquids. If the necessary precautions are not taken, the user may suffer electric shock or the product
itself may be damaged, which can also lead to personal injury.
17. Never use the product under conditions in which condensation has formed or can form in or on the
product, e.g. if the product has been moved from a cold to a warm environment. Penetration by water
increases the risk of electric shock.
18. Prior to cleaning the product, disconnect it completely from the power supply (e.g. AC supply network
or battery). Use a soft, non-linting cloth to clean the product. Never use chemical cleaning agents such
as alcohol, acetone or diluents for cellulose lacquers.
Operation
1. Operating the products requires special training and intense concentration. Make sure that persons
who use the products are physically, mentally and emotionally fit enough to do so; otherwise, injuries
or material damage may occur. It is the responsibility of the employer/operator to select suitable
personnel for operating the products.
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Basic Safety Instructions
2. Before you move or transport the product, read and observe the section titled "Transport".
3. As with all industrially manufactured goods, the use of substances that induce an allergic reaction
(allergens) such as nickel cannot be generally excluded. If you develop an allergic reaction (such as a
skin rash, frequent sneezing, red eyes or respiratory difficulties) when using a Rohde & Schwarz
product, consult a physician immediately to determine the cause and to prevent health problems or
stress.
4. Before you start processing the product mechanically and/or thermally, or before you take it apart, be
sure to read and pay special attention to the section titled "Waste disposal/Environmental protection",
item 1.
5. Depending on the function, certain products such as RF radio equipment can produce an elevated
level of electromagnetic radiation. Considering that unborn babies require increased protection,
pregnant women must be protected by appropriate measures. Persons with pacemakers may also be
exposed to risks from electromagnetic radiation. The employer/operator must evaluate workplaces
where there is a special risk of exposure to radiation and, if necessary, take measures to avert the
potential danger.
6. Should a fire occur, the product may release hazardous substances (gases, fluids, etc.) that can
cause health problems. Therefore, suitable measures must be taken, e.g. protective masks and
protective clothing must be worn.
7. Laser products are given warning labels that are standardized according to their laser class. Lasers
can cause biological harm due to the properties of their radiation and due to their extremely
concentrated electromagnetic power. If a laser product (e.g. a CD/DVD drive) is integrated into a
Rohde & Schwarz product, absolutely no other settings or functions may be used as described in the
product documentation. The objective is to prevent personal injury (e.g. due to laser beams).
8. EMC classes (in line with EN 55011/CISPR 11, and analogously with EN 55022/CISPR 22,
EN 55032/CISPR 32)
 Class A equipment:
Equipment suitable for use in all environments except residential environments and environments
that are directly connected to a low-voltage supply network that supplies residential buildings
Note: Class A equipment is intended for use in an industrial environment. This equipment may
cause radio disturbances in residential environments, due to possible conducted as well as
radiated disturbances. In this case, the operator may be required to take appropriate measures to
eliminate these disturbances.
 Class B equipment:
Equipment suitable for use in residential environments and environments that are directly
connected to a low-voltage supply network that supplies residential buildings
Repair and service
1. The product may be opened only by authorized, specially trained personnel. Before any work is
performed on the product or before the product is opened, it must be disconnected from the AC supply
network. Otherwise, personnel will be exposed to the risk of an electric shock.
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Basic Safety Instructions
2. Adjustments, replacement of parts, maintenance and repair may be performed only by electrical
experts authorized by Rohde & Schwarz. Only original parts may be used for replacing parts relevant
to safety (e.g. power switches, power transformers, fuses). A safety test must always be performed
after parts relevant to safety have been replaced (visual inspection, protective conductor test,
insulation resistance measurement, leakage current measurement, functional test). This helps ensure
the continued safety of the product.
Batteries and rechargeable batteries/cells
If the information regarding batteries and rechargeable batteries/cells is not observed either at all or to the
extent necessary, product users may be exposed to the risk of explosions, fire and/or serious personal
injury, and, in some cases, death. Batteries and rechargeable batteries with alkaline electrolytes (e.g.
lithium cells) must be handled in accordance with the EN 62133 standard.
1. Cells must not be taken apart or crushed.
2. Cells or batteries must not be exposed to heat or fire. Storage in direct sunlight must be avoided.
Keep cells and batteries clean and dry. Clean soiled connectors using a dry, clean cloth.
3. Cells or batteries must not be short-circuited. Cells or batteries must not be stored in a box or in a
drawer where they can short-circuit each other, or where they can be short-circuited by other
conductive materials. Cells and batteries must not be removed from their original packaging until they
are ready to be used.
4. Cells and batteries must not be exposed to any mechanical shocks that are stronger than permitted.
5. If a cell develops a leak, the fluid must not be allowed to come into contact with the skin or eyes. If
contact occurs, wash the affected area with plenty of water and seek medical aid.
6. Improperly replacing or charging cells or batteries that contain alkaline electrolytes (e.g. lithium cells)
can cause explosions. Replace cells or batteries only with the matching Rohde & Schwarz type (see
parts list) in order to ensure the safety of the product.
7. Cells and batteries must be recycled and kept separate from residual waste. Rechargeable batteries
and normal batteries that contain lead, mercury or cadmium are hazardous waste. Observe the
national regulations regarding waste disposal and recycling.
Transport
1. The product may be very heavy. Therefore, the product must be handled with care. In some cases,
the user may require a suitable means of lifting or moving the product (e.g. with a lift-truck) to avoid
back or other physical injuries.
2. Handles on the products are designed exclusively to enable personnel to transport the product. It is
therefore not permissible to use handles to fasten the product to or on transport equipment such as
cranes, fork lifts, wagons, etc. The user is responsible for securely fastening the products to or on the
means of transport or lifting. Observe the safety regulations of the manufacturer of the means of
transport or lifting. Noncompliance can result in personal injury or material damage.
3. If you use the product in a vehicle, it is the sole responsibility of the driver to drive the vehicle safely
and properly. The manufacturer assumes no responsibility for accidents or collisions. Never use the
product in a moving vehicle if doing so could distract the driver of the vehicle. Adequately secure the
product in the vehicle to prevent injuries or other damage in the event of an accident.
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Instrucciones de seguridad elementales
Waste disposal/Environmental protection
1. Specially marked equipment has a battery or accumulator that must not be disposed of with unsorted
municipal waste, but must be collected separately. It may only be disposed of at a suitable collection
point or via a Rohde & Schwarz customer service center.
2. Waste electrical and electronic equipment must not be disposed of with unsorted municipal waste, but
must be collected separately.
Rohde & Schwarz GmbH & Co. KG has developed a disposal concept and takes full responsibility for
take-back obligations and disposal obligations for manufacturers within the EU. Contact your
Rohde & Schwarz customer service center for environmentally responsible disposal of the product.
3. If products or their components are mechanically and/or thermally processed in a manner that goes
beyond their intended use, hazardous substances (heavy-metal dust such as lead, beryllium, nickel)
may be released. For this reason, the product may only be disassembled by specially trained
personnel. Improper disassembly may be hazardous to your health. National waste disposal
regulations must be observed.
4. If handling the product releases hazardous substances or fuels that must be disposed of in a special
way, e.g. coolants or engine oils that must be replenished regularly, the safety instructions of the
manufacturer of the hazardous substances or fuels and the applicable regional waste disposal
regulations must be observed. Also observe the relevant safety instructions in the product
documentation. The improper disposal of hazardous substances or fuels can cause health problems
and lead to environmental damage.
For additional information about environmental protection, visit the Rohde & Schwarz website.
Instrucciones de seguridad elementales
¡Es imprescindible leer y cumplir las siguientes instrucciones e informaciones de seguridad!
El principio del grupo de empresas Rohde & Schwarz consiste en tener nuestros productos siempre al día
con los estándares de seguridad y de ofrecer a nuestros clientes el máximo grado de seguridad. Nuestros
productos y todos los equipos adicionales son siempre fabricados y examinados según las normas de
seguridad vigentes. Nuestro sistema de garantía de calidad controla constantemente que sean cumplidas
estas normas. El presente producto ha sido fabricado y examinado según el certificado de conformidad
de la UE y ha salido de nuestra planta en estado impecable según los estándares técnicos de seguridad.
Para poder preservar este estado y garantizar un funcionamiento libre de peligros, el usuario deberá
atenerse a todas las indicaciones, informaciones de seguridad y notas de alerta. El grupo de empresas
Rohde & Schwarz está siempre a su disposición en caso de que tengan preguntas referentes a estas
informaciones de seguridad.
Además queda en la responsabilidad del usuario utilizar el producto en la forma debida. Este producto
está destinado exclusivamente al uso en la industria y el laboratorio o, si ha sido expresamente
autorizado, para aplicaciones de campo y de ninguna manera deberá ser utilizado de modo que alguna
persona/cosa pueda sufrir daño. El uso del producto fuera de sus fines definidos o sin tener en cuenta las
instrucciones del fabricante queda en la responsabilidad del usuario. El fabricante no se hace en ninguna
forma responsable de consecuencias a causa del mal uso del producto.
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Instrucciones de seguridad elementales
Se parte del uso correcto del producto para los fines definidos si el producto es utilizado conforme a las
indicaciones de la correspondiente documentación del producto y dentro del margen de rendimiento
definido (ver hoja de datos, documentación, informaciones de seguridad que siguen). El uso del producto
hace necesarios conocimientos técnicos y ciertos conocimientos del idioma inglés. Por eso se debe tener
en cuenta que el producto solo pueda ser operado por personal especializado o personas instruidas en
profundidad con las capacidades correspondientes. Si fuera necesaria indumentaria de seguridad para el
uso de productos de Rohde & Schwarz, encontraría la información debida en la documentación del
producto en el capítulo correspondiente. Guarde bien las informaciones de seguridad elementales, así
como la documentación del producto, y entréguelas a usuarios posteriores.
Tener en cuenta las informaciones de seguridad sirve para evitar en lo posible lesiones o daños por
peligros de toda clase. Por eso es imprescindible leer detalladamente y comprender por completo las
siguientes informaciones de seguridad antes de usar el producto, y respetarlas durante el uso del
producto. Deberán tenerse en cuenta todas las demás informaciones de seguridad, como p. ej. las
referentes a la protección de personas, que encontrarán en el capítulo correspondiente de la
documentación del producto y que también son de obligado cumplimiento. En las presentes
informaciones de seguridad se recogen todos los objetos que distribuye el grupo de empresas
Rohde & Schwarz bajo la denominación de "producto", entre ellos también aparatos, instalaciones así
como toda clase de accesorios. Los datos específicos del producto figuran en la hoja de datos y en la
documentación del producto.
Señalización de seguridad de los productos
Las siguientes señales de seguridad se utilizan en los productos para advertir sobre riesgos y peligros.
Símbolo
Significado
Aviso: punto de peligro general
Observar la documentación del producto
Símbolo
Significado
Tensión de alimentación de PUESTA EN
MARCHA / PARADA
Atención en el manejo de dispositivos de peso
elevado
Indicación de estado de espera (standby)
Peligro de choque eléctrico
Corriente continua (DC)
Advertencia: superficie caliente
Corriente alterna (AC)
Conexión a conductor de protección
Corriente continua / Corriente alterna (DC/AC)
Conexión a tierra
El aparato está protegido en su totalidad por un
aislamiento doble (reforzado)
Conexión a masa
Distintivo de la UE para baterías y
acumuladores
Más información en la sección
"Eliminación/protección del medio ambiente",
punto 1.
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Instrucciones de seguridad elementales
Símbolo
Significado
Símbolo
Aviso: Cuidado en el manejo de dispositivos
sensibles a la electrostática (ESD)
Significado
Distintivo de la UE para la eliminación por
separado de dispositivos eléctricos y
electrónicos
Más información en la sección
"Eliminación/protección del medio ambiente",
punto 2.
Advertencia: rayo láser
Más información en la sección
"Funcionamiento", punto 7.
Palabras de señal y su significado
En la documentación del producto se utilizan las siguientes palabras de señal con el fin de advertir contra
riesgos y peligros.
Indica una situación de peligro que, si no se evita, causa lesiones
graves o incluso la muerte.
Indica una situación de peligro que, si no se evita, puede causar
lesiones graves o incluso la muerte.
Indica una situación de peligro que, si no se evita, puede causar
lesiones leves o moderadas.
Indica información que se considera importante, pero no en relación
con situaciones de peligro; p. ej., avisos sobre posibles daños
materiales.
En la documentación del producto se emplea de forma sinónima el
término CUIDADO.
Las palabras de señal corresponden a la definición habitual para aplicaciones civiles en el área
económica europea. Pueden existir definiciones diferentes a esta definición en otras áreas económicas o
en aplicaciones militares. Por eso se deberá tener en cuenta que las palabras de señal aquí descritas
sean utilizadas siempre solamente en combinación con la correspondiente documentación del producto y
solamente en combinación con el producto correspondiente. La utilización de las palabras de señal en
combinación con productos o documentaciones que no les correspondan puede llevar a interpretaciones
equivocadas y tener por consecuencia daños en personas u objetos.
Estados operativos y posiciones de funcionamiento
El producto solamente debe ser utilizado según lo indicado por el fabricante respecto a los estados
operativos y posiciones de funcionamiento sin que se obstruya la ventilación. Si no se siguen las
indicaciones del fabricante, pueden producirse choques eléctricos, incendios y/o lesiones graves con
posible consecuencia de muerte. En todos los trabajos deberán ser tenidas en cuenta las normas
nacionales y locales de seguridad del trabajo y de prevención de accidentes.
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Instrucciones de seguridad elementales
1. Si no se convino de otra manera, es para los productos Rohde & Schwarz válido lo que sigue:
como posición de funcionamiento se define por principio la posición con el suelo de la caja para
abajo, modo de protección IP 2X, uso solamente en estancias interiores, utilización hasta 2000 m
sobre el nivel del mar, transporte hasta 4500 m sobre el nivel del mar. Se aplicará una tolerancia de
±10 % sobre el voltaje nominal y de ±5 % sobre la frecuencia nominal. Categoría de sobrecarga
eléctrica 2, índice de suciedad 2.
2. No sitúe el producto encima de superficies, vehículos, estantes o mesas, que por sus características
de peso o de estabilidad no sean aptos para él. Siga siempre las instrucciones de instalación del
fabricante cuando instale y asegure el producto en objetos o estructuras (p. ej. paredes y estantes). Si
se realiza la instalación de modo distinto al indicado en la documentación del producto, se pueden
causar lesiones o, en determinadas circunstancias, incluso la muerte.
3. No ponga el producto sobre aparatos que generen calor (p. ej. radiadores o calefactores). La
temperatura ambiente no debe superar la temperatura máxima especificada en la documentación del
producto o en la hoja de datos. En caso de sobrecalentamiento del producto, pueden producirse
choques eléctricos, incendios y/o lesiones graves con posible consecuencia de muerte.
Seguridad eléctrica
Si no se siguen (o se siguen de modo insuficiente) las indicaciones del fabricante en cuanto a seguridad
eléctrica, pueden producirse choques eléctricos, incendios y/o lesiones graves con posible consecuencia
de muerte.
1. Antes de la puesta en marcha del producto se deberá comprobar siempre que la tensión
preseleccionada en el producto coincida con la de la red de alimentación eléctrica. Si es necesario
modificar el ajuste de tensión, también se deberán cambiar en caso dado los fusibles
correspondientes del producto.
2. Los productos de la clase de protección I con alimentación móvil y enchufe individual solamente
podrán enchufarse a tomas de corriente con contacto de seguridad y con conductor de protección
conectado.
3. Queda prohibida la interrupción intencionada del conductor de protección, tanto en la toma de
corriente como en el mismo producto. La interrupción puede tener como consecuencia el riesgo de
que el producto sea fuente de choques eléctricos. Si se utilizan cables alargadores o regletas de
enchufe, deberá garantizarse la realización de un examen regular de los mismos en cuanto a su
estado técnico de seguridad.
4. Si el producto no está equipado con un interruptor para desconectarlo de la red, o bien si el
interruptor existente no resulta apropiado para la desconexión de la red, el enchufe del cable de
conexión se deberá considerar como un dispositivo de desconexión.
El dispositivo de desconexión se debe poder alcanzar fácilmente y debe estar siempre bien accesible.
Si, p. ej., el enchufe de conexión a la red es el dispositivo de desconexión, la longitud del cable de
conexión no debe superar 3 m).
Los interruptores selectores o electrónicos no son aptos para el corte de la red eléctrica. Si se
integran productos sin interruptor en bastidores o instalaciones, se deberá colocar el interruptor en el
nivel de la instalación.
5. No utilice nunca el producto si está dañado el cable de conexión a red. Compruebe regularmente el
correcto estado de los cables de conexión a red. Asegúrese, mediante las medidas de protección y
de instalación adecuadas, de que el cable de conexión a red no pueda ser dañado o de que nadie
pueda ser dañado por él, p. ej. al tropezar o por un choque eléctrico.
1171.0000.42 - 08
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Instrucciones de seguridad elementales
6. Solamente está permitido el funcionamiento en redes de alimentación TN/TT aseguradas con fusibles
de 16 A como máximo (utilización de fusibles de mayor amperaje solo previa consulta con el grupo de
empresas Rohde & Schwarz).
7. Nunca conecte el enchufe en tomas de corriente sucias o llenas de polvo. Introduzca el enchufe por
completo y fuertemente en la toma de corriente. La no observación de estas medidas puede provocar
chispas, fuego y/o lesiones.
8. No sobrecargue las tomas de corriente, los cables alargadores o las regletas de enchufe ya que esto
podría causar fuego o choques eléctricos.
9. En las mediciones en circuitos de corriente con una tensión U eff > 30 V se deberán tomar las medidas
apropiadas para impedir cualquier peligro (p. ej. medios de medición adecuados, seguros, limitación
de tensión, corte protector, aislamiento etc.).
10. Para la conexión con dispositivos informáticos como un PC o un ordenador industrial, debe
comprobarse que éstos cumplan los estándares IEC60950-1/EN60950-1 o IEC61010-1/EN 61010-1
válidos en cada caso.
11. A menos que esté permitido expresamente, no retire nunca la tapa ni componentes de la carcasa
mientras el producto esté en servicio. Esto pone a descubierto los cables y componentes eléctricos y
puede causar lesiones, fuego o daños en el producto.
12. Si un producto se instala en un lugar fijo, se deberá primero conectar el conductor de protección fijo
con el conductor de protección del producto antes de hacer cualquier otra conexión. La instalación y
la conexión deberán ser efectuadas por un electricista especializado.
13. En el caso de dispositivos fijos que no estén provistos de fusibles, interruptor automático ni otros
mecanismos de seguridad similares, el circuito de alimentación debe estar protegido de modo que
todas las personas que puedan acceder al producto, así como el producto mismo, estén a salvo de
posibles daños.
14. Todo producto debe estar protegido contra sobretensión (debida p. ej. a una caída del rayo) mediante
los correspondientes sistemas de protección. Si no, el personal que lo utilice quedará expuesto al
peligro de choque eléctrico.
15. No debe introducirse en los orificios de la caja del aparato ningún objeto que no esté destinado a ello.
Esto puede producir cortocircuitos en el producto y/o puede causar choques eléctricos, fuego o
lesiones.
16. Salvo indicación contraria, los productos no están impermeabilizados (ver también el capítulo
"Estados operativos y posiciones de funcionamiento", punto 1). Por eso es necesario tomar las
medidas necesarias para evitar la entrada de líquidos. En caso contrario, existe peligro de choque
eléctrico para el usuario o de daños en el producto, que también pueden redundar en peligro para las
personas.
17. No utilice el producto en condiciones en las que pueda producirse o ya se hayan producido
condensaciones sobre el producto o en el interior de éste, como p. ej. al desplazarlo de un lugar frío a
otro caliente. La entrada de agua aumenta el riesgo de choque eléctrico.
18. Antes de la limpieza, desconecte por completo el producto de la alimentación de tensión (p. ej. red de
alimentación o batería). Realice la limpieza de los aparatos con un paño suave, que no se deshilache.
No utilice bajo ningún concepto productos de limpieza químicos como alcohol, acetona o diluyentes
para lacas nitrocelulósicas.
1171.0000.42 - 08
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Instrucciones de seguridad elementales
Funcionamiento
1. El uso del producto requiere instrucciones especiales y una alta concentración durante el manejo.
Debe asegurarse que las personas que manejen el producto estén a la altura de los requerimientos
necesarios en cuanto a aptitudes físicas, psíquicas y emocionales, ya que de otra manera no se
pueden excluir lesiones o daños de objetos. El empresario u operador es responsable de seleccionar
el personal usuario apto para el manejo del producto.
2. Antes de desplazar o transportar el producto, lea y tenga en cuenta el capítulo "Transporte".
3. Como con todo producto de fabricación industrial no puede quedar excluida en general la posibilidad
de que se produzcan alergias provocadas por algunos materiales empleados ―los llamados
alérgenos (p. ej. el níquel)―. Si durante el manejo de productos Rohde & Schwarz se producen
reacciones alérgicas, como p. ej. irritaciones cutáneas, estornudos continuos, enrojecimiento de la
conjuntiva o dificultades respiratorias, debe avisarse inmediatamente a un médico para investigar las
causas y evitar cualquier molestia o daño a la salud.
4. Antes de la manipulación mecánica y/o térmica o el desmontaje del producto, debe tenerse en cuenta
imprescindiblemente el capítulo "Eliminación/protección del medio ambiente", punto 1.
5. Ciertos productos, como p. ej. las instalaciones de radiocomunicación RF, pueden a causa de su
función natural, emitir una radiación electromagnética aumentada. Deben tomarse todas las medidas
necesarias para la protección de las mujeres embarazadas. También las personas con marcapasos
pueden correr peligro a causa de la radiación electromagnética. El empresario/operador tiene la
obligación de evaluar y señalizar las áreas de trabajo en las que exista un riesgo elevado de
exposición a radiaciones.
6. Tenga en cuenta que en caso de incendio pueden desprenderse del producto sustancias tóxicas
(gases, líquidos etc.) que pueden generar daños a la salud. Por eso, en caso de incendio deben
usarse medidas adecuadas, como p. ej. máscaras antigás e indumentaria de protección.
7. Los productos con láser están provistos de indicaciones de advertencia normalizadas en función de la
clase de láser del que se trate. Los rayos láser pueden provocar daños de tipo biológico a causa de
las propiedades de su radiación y debido a su concentración extrema de potencia electromagnética.
En caso de que un producto Rohde & Schwarz contenga un producto láser (p. ej. un lector de
CD/DVD), no debe usarse ninguna otra configuración o función aparte de las descritas en la
documentación del producto, a fin de evitar lesiones (p. ej. debidas a irradiación láser).
8. Clases de compatibilidad electromagnética (conforme a EN 55011 / CISPR 11; y en analogía con EN
55022 / CISPR 22, EN 55032 / CISPR 32)
 Aparato de clase A:
Aparato adecuado para su uso en todos los entornos excepto en los residenciales y en aquellos
conectados directamente a una red de distribución de baja tensión que suministra corriente a
edificios residenciales.
Nota: Los aparatos de clase A están destinados al uso en entornos industriales. Estos aparatos
pueden causar perturbaciones radioeléctricas en entornos residenciales debido a posibles
perturbaciones guiadas o radiadas. En este caso, se le podrá solicitar al operador que tome las
medidas adecuadas para eliminar estas perturbaciones.
 Aparato de clase B:
Aparato adecuado para su uso en entornos residenciales, así como en aquellos conectados
directamente a una red de distribución de baja tensión que suministra corriente a edificios
residenciales.
1171.0000.42 - 08
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Instrucciones de seguridad elementales
Reparación y mantenimiento
1. El producto solamente debe ser abierto por personal especializado con autorización para ello. Antes
de manipular el producto o abrirlo, es obligatorio desconectarlo de la tensión de alimentación, para
evitar toda posibilidad de choque eléctrico.
2. El ajuste, el cambio de partes, el mantenimiento y la reparación deberán ser efectuadas solamente
por electricistas autorizados por Rohde & Schwarz. Si se reponen partes con importancia para los
aspectos de seguridad (p. ej. el enchufe, los transformadores o los fusibles), solamente podrán ser
sustituidos por partes originales. Después de cada cambio de partes relevantes para la seguridad
deberá realizarse un control de seguridad (control a primera vista, control del conductor de
protección, medición de resistencia de aislamiento, medición de la corriente de fuga, control de
funcionamiento). Con esto queda garantizada la seguridad del producto.
Baterías y acumuladores o celdas
Si no se siguen (o se siguen de modo insuficiente) las indicaciones en cuanto a las baterías y
acumuladores o celdas, pueden producirse explosiones, incendios y/o lesiones graves con posible
consecuencia de muerte. El manejo de baterías y acumuladores con electrolitos alcalinos (p. ej. celdas de
litio) debe seguir el estándar EN 62133.
1. No deben desmontarse, abrirse ni triturarse las celdas.
2. Las celdas o baterías no deben someterse a calor ni fuego. Debe evitarse el almacenamiento a la luz
directa del sol. Las celdas y baterías deben mantenerse limpias y secas. Limpiar las conexiones
sucias con un paño seco y limpio.
3. Las celdas o baterías no deben cortocircuitarse. Es peligroso almacenar las celdas o baterías en
estuches o cajones en cuyo interior puedan cortocircuitarse por contacto recíproco o por contacto con
otros materiales conductores. No deben extraerse las celdas o baterías de sus embalajes originales
hasta el momento en que vayan a utilizarse.
4. Las celdas o baterías no deben someterse a impactos mecánicos fuertes indebidos.
5. En caso de falta de estanqueidad de una celda, el líquido vertido no debe entrar en contacto con la
piel ni los ojos. Si se produce contacto, lavar con agua abundante la zona afectada y avisar a un
médico.
6. En caso de cambio o recarga inadecuados, las celdas o baterías que contienen electrolitos alcalinos
(p. ej. las celdas de litio) pueden explotar. Para garantizar la seguridad del producto, las celdas o
baterías solo deben ser sustituidas por el tipo Rohde & Schwarz correspondiente (ver lista de
recambios).
7. Las baterías y celdas deben reciclarse y no deben tirarse a la basura doméstica. Las baterías o
acumuladores que contienen plomo, mercurio o cadmio deben tratarse como residuos especiales.
Respete en esta relación las normas nacionales de eliminación y reciclaje.
Transporte
1. El producto puede tener un peso elevado. Por eso es necesario desplazarlo o transportarlo con
precaución y, si es necesario, usando un sistema de elevación adecuado (p. ej. una carretilla
elevadora), a fin de evitar lesiones en la espalda u otros daños personales.
1171.0000.42 - 08
Page 13
Instrucciones de seguridad elementales
2. Las asas instaladas en los productos sirven solamente de ayuda para el transporte del producto por
personas. Por eso no está permitido utilizar las asas para la sujeción en o sobre medios de transporte
como p. ej. grúas, carretillas elevadoras de horquilla, carros etc. Es responsabilidad suya fijar los
productos de manera segura a los medios de transporte o elevación. Para evitar daños personales o
daños en el producto, siga las instrucciones de seguridad del fabricante del medio de transporte o
elevación utilizado.
3. Si se utiliza el producto dentro de un vehículo, recae de manera exclusiva en el conductor la
responsabilidad de conducir el vehículo de manera segura y adecuada. El fabricante no asumirá
ninguna responsabilidad por accidentes o colisiones. No utilice nunca el producto dentro de un
vehículo en movimiento si esto pudiera distraer al conductor. Asegure el producto dentro del vehículo
debidamente para evitar, en caso de un accidente, lesiones u otra clase de daños.
Eliminación/protección del medio ambiente
1. Los dispositivos marcados contienen una batería o un acumulador que no se debe desechar con los
residuos domésticos sin clasificar, sino que debe ser recogido por separado. La eliminación se debe
efectuar exclusivamente a través de un punto de recogida apropiado o del servicio de atención al
cliente de Rohde & Schwarz.
2. Los dispositivos eléctricos usados no se deben desechar con los residuos domésticos sin clasificar,
sino que deben ser recogidos por separado.
Rohde & Schwarz GmbH & Co.KG ha elaborado un concepto de eliminación de residuos y asume
plenamente los deberes de recogida y eliminación para los fabricantes dentro de la UE. Para
desechar el producto de manera respetuosa con el medio ambiente, diríjase a su servicio de atención
al cliente de Rohde & Schwarz.
3. Si se trabaja de manera mecánica y/o térmica cualquier producto o componente más allá del
funcionamiento previsto, pueden liberarse sustancias peligrosas (polvos con contenido de metales
pesados como p. ej. plomo, berilio o níquel). Por eso el producto solo debe ser desmontado por
personal especializado con formación adecuada. Un desmontaje inadecuado puede ocasionar daños
para la salud. Se deben tener en cuenta las directivas nacionales referentes a la eliminación de
residuos.
4. En caso de que durante el trato del producto se formen sustancias peligrosas o combustibles que
deban tratarse como residuos especiales (p. ej. refrigerantes o aceites de motor con intervalos de
cambio definidos), deben tenerse en cuenta las indicaciones de seguridad del fabricante de dichas
sustancias y las normas regionales de eliminación de residuos. Tenga en cuenta también en caso
necesario las indicaciones de seguridad especiales contenidas en la documentación del producto. La
eliminación incorrecta de sustancias peligrosas o combustibles puede causar daños a la salud o
daños al medio ambiente.
Se puede encontrar más información sobre la protección del medio ambiente en la página web de
Rohde & Schwarz.
1171.0000.42 - 08
Page 14
Instructions - Instrucciones
Instructions for Electrostatic Discharge Protection
Risk of damaging electronic components
To avoid damage of electronic components, the operational site must be
protected against electrostatic discharge (ESD).
Wrist strap with cord
Floor mat
Heel strap
Ground connection
of operational site
The following two methods of ESD protection may be used together or
separately:
, Wrist strap with cord to ground connection
, Conductive floor mat and heel strap combination
1171.0300.62
E/Esp-3
Instructions - Instrucciones
Instrucciones para la protección contra descargas
electroestáticas
Riesgo de avería de los componentes electrónicos
Para evitar averías en los componentes electrónicos, el área de trabajo
tiene que estar protegido contra descargas electroestáticas ESD (electrostatic discharge).
Muñequera con cordón
Estera
Talonera
Conexión a tierra del
área de trabajo
Los siguientes dos métodos de protección ESD pueden ser usados juntos o separados:
, Muñequera con cordón para conexión a tierra
, Combinación de estera antiestática y talonera
1171.0300.62
E/Esp-3
Procedure in Case of Service and Ordering of Spare
Parts
This section contains information on shipping an instrument to your service center and ordering spare
parts.
Please contact your local Rohde & Schwarz service center if you need service or repair work of your
equipment or to order spare parts. You can find the current address of your representative on our
.
homepage
Shipping the Instrument
We require the following information in order to answer your inquiry fast and correctly and to determine
whether the warranty is still valid for your instrument:
●
●
●
●
●
●
●
Instrument model
Serial number
Firmware version
Must the instrument be returned with this firmware?
Detailed error description in case of repair
Indication of desired calibration
Contact person for possible questions
In some countries, an RMA process is available for the return shipment of the instrument. For details,
contact your local representative.
When shipping the instrument, be careful to provide for sufficient mechanical and antistatic protection.
●
●
Use the original packaging for transporting or shipping the instrument. The protective caps for the front
and rear prevent damage to the operating elements and the connectors.
If you do not use the original packaging, provide for sufficient padding to prevent the instrument from
slipping inside the box. Wrap antistatic packing foil around the instrument to protect it from electrostatic charging.
Rohde & Schwarz offers repair and calibrations of the test systems it produces. The calibration
documentation fulfills ISO 17025 requirements.
Shipping Defective Modules
Also when shipping a module, be careful to provide for sufficient mechanical and antistatic protection.
●
●
Ship the module in a sturdy, padded box.
Wrap the module in antistatic foil.
If the packaging is only antistatic but not conductive, additional conductive packaging is required. The
additional packaging is not required if the tightly fitting packaging is conductive.
Exception:
If the module contains a battery, the tightly fitting packaging must always consist of antistatic, nonchargeable material to protect the battery from being discharged.
1171.0200.61-02
1
Ordering Spare Parts
To deliver spare parts promptly and correctly, we need the following information:
●
●
●
●
●
●
●
●
Stock number (see list of spare parts in chapter "Documents")
Designation
Component number according to list of spare parts
Number of pieces
Instrument type for which the spare part is needed
Instrument stock number
Instrument serial number
Contact person for possible questions
Refurbished Modules
Refurbished modules are an economical alternative to original modules. Bear in mind that refurbished
modules are not new, but repaired and fully tested parts. They may have traces from use, but they are
electrically and mechanically equivalent to new modules.
Your Rohde & Schwarz representative will be happy to inform you about which modules are available as
refurbished modules.
Taking Back Defective Replaced Modules
Defective modules of the replacement program which cannot be repaired are taken back within three
months following delivery. A repurchasing value is credited.
Excluded are parts which cannot be repaired, e.g. printed boards that are burnt, broken or damaged by
attempts to repair them, incomplete modules, and parts with severe mechanical damage.
Please return the defective replacement modules, together with the accompanying document for returned
merchandise, which you received with the spare module. We need the following information:
●
●
●
●
●
●
●
Stock number, serial number and designation of the removed part
Detailed error description
Stock number, serial number and type of instrument from which the module was removed
Date of removal
Name of the engineer/technician who replaced the module
R&S ordering number
Service reference number (if available)
1171.0200.61-02
2
R&S SGS100A
Table of Contents
Table of Contents
1
Performance Test ......................................................................................... 8
1.1
Test Equipment ......................................................................................................................8
1.2
Test Assemblies ...................................................................................................................10
1.2.1
Test Assembly for Output Impedance (VSWR) ......................................................................10
1.2.2
Test Assembly for Setting Time .............................................................................................. 11
1.2.3
Test Assembly for I/Q Modulation .......................................................................................... 11
1.2.4
Test Assembly for Pulse modulation ...................................................................................... 11
1.3
Preparation, Recommended Test Frequencies and Levels .............................................12
1.4
Test Procedures ...................................................................................................................13
1.4.1
Reference Frequency.............................................................................................................13
1.4.1.1
Internal Reference Mode........................................................................................................13
1.4.1.2
External Reference mode ......................................................................................................14
1.4.2
Frequency ..............................................................................................................................15
1.4.2.1
Frequency Setting ..................................................................................................................15
1.4.2.2
Setting Time ...........................................................................................................................15
1.4.3
Spectral Purity ........................................................................................................................19
1.4.3.1
Harmonics ..............................................................................................................................19
1.4.3.2
Subharmonics ........................................................................................................................20
1.4.3.3
Nonharmonics ........................................................................................................................20
1.4.3.4
Non-systematic nonharmonics ...............................................................................................22
1.4.3.5
Wideband Noise .....................................................................................................................23
1.4.3.6
SSB Phase Noise ...................................................................................................................25
1.4.3.7
Residual FM ...........................................................................................................................26
1.4.3.8
Residual AM ...........................................................................................................................28
1.4.4
Level Data ..............................................................................................................................30
1.4.4.1
Level Uncertainty ...................................................................................................................30
1.4.4.2
Output Impedance ..................................................................................................................32
1.4.4.3
Setting Time ...........................................................................................................................33
1.4.5
Pulse Modulation (Option R&S SGS-K22) .............................................................................35
1.4.5.1
ON/OFF Ratio ........................................................................................................................35
1.4.5.2
Rise/ Fall Time and Pulse Overshoot .....................................................................................36
Service Manual 1173.9111.02 -06
3
R&S SGS100A
Table of Contents
1.4.5.3
Video Crosstalk ......................................................................................................................37
1.4.5.4
Pulse Video Signal .................................................................................................................38
1.4.6
I/Q modulation ........................................................................................................................39
1.4.6.1
Input Impedance (VSWR) ......................................................................................................39
1.4.6.2
Error Vector ............................................................................................................................40
1.4.6.3
Residual Carrier and Leakage ...............................................................................................41
1.4.6.4
I/Q Imbalance .........................................................................................................................42
1.4.6.5
Adjacent Channel Power for 3GPP FDD ...............................................................................43
1.4.6.6
Frequency Response of Baseband Bypass path ...................................................................44
1.4.6.7
Level linearity of Baseband Bypass path ...............................................................................45
1.4.7
Phase Coherence Levels (Option R&S SGS-K90) ................................................................46
1.4.8
PCI Express Interface ............................................................................................................46
2
Adjustment ................................................................................................. 47
2.1
Procedures after Module Replacement .............................................................................47
2.1.1
Restore Ethernet MAC Adress ...............................................................................................48
2.2
Adding Hardware Options ...................................................................................................48
2.3
Internal Adjustments ............................................................................................................50
2.4
External Adjustments Requiring Measurement Equipment ............................................50
2.5
Adjustment of internal Reference Frequency ...................................................................50
2.5.1
Adjustment .............................................................................................................................51
2.6
Internal Self Test ..................................................................................................................51
3
Repair .......................................................................................................... 52
3.1
Functional Description ........................................................................................................53
3.1.1
Power Supply Module ............................................................................................................53
3.1.2
Controller Board .....................................................................................................................53
3.1.2.1
Switching regulators ...............................................................................................................53
3.1.2.2
Controller ................................................................................................................................53
3.1.2.3
FPGA (SIGMA_COM) ............................................................................................................53
3.1.2.4
Diagnostic Multiplexer ............................................................................................................53
3.1.2.5
EEPROM ................................................................................................................................53
3.1.2.6
Temperature sensor ...............................................................................................................54
3.1.3
RF Mainboard ........................................................................................................................54
3.1.3.1
Block diagram ........................................................................................................................54
Service Manual 1173.9111.02 -06
4
R&S SGS100A
Table of Contents
3.1.3.2
Implemented functions ...........................................................................................................55
3.1.3.3
Internal and external reference ..............................................................................................55
3.1.3.4
Main 1000 MHz oscillator .......................................................................................................55
3.1.3.5
RF Synthesizer/ DDS module ................................................................................................55
3.1.3.6
Vector modulator ....................................................................................................................56
3.1.3.7
Harmonics filters ....................................................................................................................56
3.1.3.8
Automatic Level control ..........................................................................................................56
3.1.3.9
Fan Controller ........................................................................................................................56
3.1.3.10
Supply voltage control and filtering ........................................................................................56
3.1.4
Doubler Board ........................................................................................................................57
3.1.4.1
Doubler Board architecture ....................................................................................................57
3.1.4.2
Doubler Board diagram ..........................................................................................................57
3.1.5
Step Attenuator .......................................................................................................................58
3.1.5.1
Step Attenuator architecture ...................................................................................................58
3.1.5.2
Step Attenuator diagram ........................................................................................................58
3.1.5.3
Power Amplifiers ....................................................................................................................58
3.1.5.4
Voltage Regulators and filtering .............................................................................................58
3.1.6
R&S SGS-B1 Reference Oscillator ........................................................................................59
3.2
Troubleshooting ...................................................................................................................60
3.2.1
Measuring Equipment and Accessories .................................................................................61
3.2.2
Switch-On Problems ..............................................................................................................61
3.2.2.1
Test Points on Controller Board .............................................................................................63
3.2.3
Keyboard and LED Test .........................................................................................................64
3.2.4
USB Cable Test ......................................................................................................................65
3.2.5
Troubleshooting with Internal Selftest ....................................................................................66
3.2.6
Troubleshooting with Internal Adjustments ............................................................................67
3.2.7
Instrument Faults ...................................................................................................................68
3.2.7.1
Fuses .....................................................................................................................................74
3.2.8
Troubleshooting − RF Mainboard ..........................................................................................76
3.2.8.1
Internal Adjustment “Adjust All” ..............................................................................................76
3.2.8.2
Supply Voltages .....................................................................................................................77
3.2.8.3
Input and Output Signals........................................................................................................78
3.2.8.4
Error Messages Concerning the RF Mainboard ....................................................................80
Service Manual 1173.9111.02 -06
5
R&S SGS100A
Table of Contents
3.2.8.5
Warnings Concerning the RF Mainboard ...............................................................................80
3.2.8.6
Frequency Error .....................................................................................................................81
3.2.9
Troubleshooting − Reference Oscillator option R&S SGS-B1 ...............................................81
3.2.9.1
Input and Output Signals........................................................................................................81
3.2.9.2
Error Messages Concerning the Reference Oscillator Module..............................................83
3.2.9.3
Frequency Error, Reference Oscillator Adjustment ................................................................84
3.2.10
Troubleshooting − Active Step Attenuator ..............................................................................84
3.2.10.1
Supply Voltages .....................................................................................................................84
3.2.11
Troubleshooting − Doubler Board option R&S SGS-B112/-B112V ........................................86
3.2.11.1
Supply Voltages .....................................................................................................................86
3.2.11.2
Input and Output Signals........................................................................................................87
3.3
Module Replacement and Upgrade ....................................................................................88
3.3.1
Required Tools .......................................................................................................................88
3.3.2
Module Overview ...................................................................................................................88
3.3.3
After Replacing an Assembly .................................................................................................89
3.3.4
Removing the Case................................................................................................................89
3.3.5
Installing the Case ..................................................................................................................90
3.3.6
Replacing the EMC Panel ......................................................................................................91
3.3.6.1
Removing the EMC Panel ......................................................................................................91
3.3.6.2
Installing the EMC Panel ........................................................................................................91
3.3.7
Replacing the Power Supply (A50) ........................................................................................92
3.3.7.1
Removing the Power Supply ..................................................................................................92
3.3.7.2
Installing the Power Supply (A50) ..........................................................................................94
3.3.8
Replacing the RF Mainboard (A200) or Controller Board (A100) ..........................................95
3.3.8.1
Removing the RF Mainboard or Controller Board .................................................................95
3.3.8.2
Installing the RF Mainboard (A200) or Controller Board (A100) ............................................97
3.3.8.3
Replacing the SIM Card .......................................................................................................100
3.3.9
Replacing the Front Unit ......................................................................................................100
3.3.9.1
Removing the Front Unit ......................................................................................................100
3.3.10
Replacing the Flex Switch Board A300 ................................................................................101
3.3.10.1
Removing the Flex Switch Board and Push-Button Board ..................................................101
3.3.10.2
Installing the Flex Switch Board and the Push-Button Board ..............................................102
3.3.11
Replacing the Fan E1 ...........................................................................................................103
Service Manual 1173.9111.02 -06
6
R&S SGS100A
Table of Contents
3.3.12
Replacing the OCXO Board R&S SGS-B1 ..........................................................................104
3.3.12.1
Removing the OCXO Board .................................................................................................104
3.3.12.2
Installing the OCXO Board ...................................................................................................105
3.3.13
Replacing the Doubler Board - R&S SGS-B112/-B112V (A400) .........................................106
3.3.13.1
Removing the Doubler Board ...............................................................................................106
3.3.13.2
Installing the Doubler Board .................................................................................................107
3.3.14
Replacing the Electronic Step Attenuator R&S SGS-B26 (A500) ........................................108
3.3.14.1
Removing the Electronic Step Attenuator ............................................................................108
3.3.14.2
Installing the Electronic Step Attenuator .............................................................................. 110
4
Firmware Update ....................................................................................... 112
5
Factory Recover and USB Install ............................................................. 113
6
Documents ................................................................................................. 114
6.1
Spare Parts.......................................................................................................................... 114
6.1.1
Available Power Cables ....................................................................................................... 114
6.2
Spare Part List and Mechanical Drawings ....................................................................... 115
Index
............................................................................................................ 116
Service Manual 1173.9111.02 -06
7
R&S SGS100A
Performance Test
Test Equipment
1 Performance Test
Test Instructions
To ensure that rated specifications are maintained, the following preparations must be
made prior to checking the rated characteristics:
●
●
●
●
Check the instrument condition. Make sure the instrument fan operation is not
constrained by dust etc. The fan can be inspected through the air intake at the
case bottom side.
Allow for a minimum warm-up time of 30 minutes at ambient temperature.
Carry out all internal adjustments.
The values are specified in the data sheet. Additional uncertainties introduced by
the measurement equipment must be taken into account when checking the rated
values.
This performance test describes the steps for testing the R&S SGS100A Signal
Generator family and the installed options with respect to function and compliance with
specifications.
In the following, the term DUT (Device Under Test) is used for any signal generator of
this family. The tests to be performed depend on the installed options. The values are
given in the data sheet of the respective instrument
1.1 Test Equipment
Table 1-1 Measuring equipment and accessories
Item Type of
equipment
Recommended
characteristics or features
1
Frequency
counter
1 Hz to RFmax,
resolution 0.1 Hz
(included in RF analyzer
item 19)
2
Reference
source for SSB
noise
measurements
Identical generator as DUT
or generator with at least 10
dB lower SSB noise as DUT
Frequency range up to
RFmax
Service Manual 1173.9111.02 -06
Recommended model
R&S Order No.
R&S SGS100A with
adequate frequency option
or
1416.0505.02
R&S SMF100A
only for f ≥ 1000 MHz or
1158.2878
1167.0000.02
R&S SMA100A
with option R&S SMA-B106
and option R&S SMA-B22
only for f  6000 MHz
1400.0000K02
1405.0809.02
1405.1805.02
8
R&S SGS100A
Performance Test
Test Equipment
4
Controller
Industry standard PC/XT/AT
with IEC-60625 interface
and
USB interface
and LAN interface and
optional PCI Express
interface
5
Signal
generator
1 MHz to RFmax
R&S SMB100A with
adequate frequency option
or
1406.6000K03
R&S SMF100A
with option R&S SMF-B2
1167.0000K02
1167.4005.02
6
Phase noise
test assembly
Phase Noise Test Set
R&S FSUP 26 or
R&S FSUP 50
1166.3505.27
1166.3505.51
7
Oscilloscope
Bandwidth ≥ 500 MHz,
two channels with DC
coupling
R&S RTM1052 or similar
1305.0008.52
8
RF power
meter
1 MHz to RFmax
R&S NRP with
R&S NRP-Z55 or
R&S NRP-Z51
1143.8500.02
1138.2008.02
1138.0005.0x
9
Mixer
10 MHz to RFmax
IF down to DC
10
VSWR bridge
1 MHz to RFmax
directivity > 30 dB
f < 4 GHz: R&S ZRC
3 GHz f < 12.75 GHz:
Agilent 773D
1039.9492.55
14
Arbitrary wave
generator
two channels
R&S SMBV
R&S SMU
1407.6004K02
1141.2005.02
15
AC/DC
voltmeter
10 Hz to 10 MHz
R&S URE3
350.5315.03
16
Broadband FM
demodulator
included in RF analyzer
item 19
19
RF analyzer &
Demodulator
for analog
modulations &
FMdemodulator
1 MHz to RFmax * 2
R&S FSQ26 with options
R&S FSU-B25
R&S FSQ K7
1155.5001.26
1044.9298.02
1141.1796.02
20
Software for
simulation of
digital
modulations
Generation of data for
ARB generator
R&S WinIQSIM
Service Manual 1173.9111.02 -06
9
R&S SGS100A
Performance Test
Test Assemblies
21
Lowpass filter
(2 pieces
required)
Lowpass filter 2.5 MHz to
remove WCDMA I/Q BB test
signal noise
Passband loss < 0.5 dB for
f = 0…2 MHz
Stopband loss > 15 dB for
f > 3 MHz
Linearity IP3 > 50 dBm
23
PCIe cable
PCIe extension cable with
single lane connectors,
length max. 5 m
One Stop Systems
OSS-PCIe-CBL-x1
or equivalent
24
PCIe device
External single lane PCIe
device
R&S PCIe test port
5009.9002.02
1.2 Test Assemblies
1.2.1 Test Assembly for Output Impedance (VSWR)
Test equipment
-
VSWR bridge (item 10)
Signal generator (item 5)
RF analyzer (item 19)
Test setup
2nd RF
6 dB
OUTPUT
COUPLED
INPUT
10 MHz Ref.
Note:
Service Manual 1173.9111.02 -06
The INPUT of the directional coupler is directly
screwed to the DUT. The second signal generator is
connected to the line connector (OUTPUT), the
analyzer to the coupling output (COUPLED) of the
directional coupler.
10
R&S SGS100A
Performance Test
Test Assemblies
1.2.2 Test Assembly for Setting Time
Test equipment
-
RF analyzer (item 19)
Test setup
Controller
LAN
Trigger pulse
10 MHz Ref.
RF
1.2.3 Test Assembly for I/Q Modulation
Test equipment
-
RF analyzer (item 19)
Arbitrary waveform generator (item 14)
Software for simulation of digital modulations (item 20)
Controller (item 4)
Test setup
Processor
IEEE(IEC)
Bus
I
Q
DUT
Ref.
10 MHz
ModulationsARB
analysator
generator
RF analyzer
(dig. demodulation)
RF
1.2.4 Test Assembly for Pulse modulation
Test equipment
-
Oscilloscope ( item 7),
Signal Generator (item 5)
Mixer (item 9)
Test setup
Pulse
10 MHz Ref.
LO
Trig
Service Manual 1173.9111.02 -06
RF
RF
11
R&S SGS100A
Performance Test
Preparation, Recommended Test Frequencies and Levels
1.3 Preparation, Recommended Test Frequencies and
Levels
To ensure proper conditions for the performance test and prevent setting errors, the
instrument must be prepared as follows:
 Check the instrument condition. Make sure the instrument fan operation is not
constrained by dust etc. The fan can be inspected through the air intake at the case
bottom side.
 Allow for a minimum warm-up time of 30 minutes at ambient temperature.
Carry out all internal adjustments (see operating manual, chapter 4, section
"Internal Adjustment - Setup-System").
Perform Preset to establish a defined initial state before configuring a new
measurement.
The following sections describe the procedures for checking the rated values. The
values are specified in the data sheet. Additional uncertainties introduced by the
measurement equipment must be taken into account when checking the rated values.
The following table lists the important internal switch point frequencies and the
recommended measurement frequencies derived from these frequencies. We
recommend measurements at these frequencies unless particular test frequencies are
specified. In the following, RFmax is the maximal settable RF (depending on installed
options).
Table 1-2 Range limits, main test frequencies for CW Mode
Range
Frequency
Hardware switching points
Recommended test frequencies
Direct DDS
Synthesis
1 MHz  f  80 MHz
80 MHz
Divider /64
80 MHz < f  93.75 MHz
93.75 MHz
1 MHz; 5.001 MHz;
10.01 MHz; 20.01 MHz, 40.01 MHz,
60.01 MHz, 80 MHz
80.01 MHz; 93.75 MHz
Divider /32
93.75 MHz < f  187.5 MHz
120 MHz; 187.5 MHz
93.76 MHz; 120 MHz; 187.5 MHz
Divider /16
187.5 MHz < f  375 MHz
265 MHz; 375MHz
187.6 MHz; 265 MHz; 375 MHz
Divider /8
375 MHz < f  750 MHz
530MHz; 750MHz
375.1 MHz; 530 MHz; 750 MHz
Divider /4
750 MHz < f  1500 MHz
1060MHz; 1500 MHz
750.1 MHz; 1060 MHz; 1500 MHz
Divider /2
1500 MHz < f  3 GHz
2120 MHz; 3000 MHz
1501 MHz; 2120 MHz; 3000 MHz
Base octave
3 GHz < f  6.5 GHz
4000 MHz, 6000 MHz,
6500 MHz
Doubler range
6.5 GHz < f  12.75 GHz
7200 MHz, 7300 MHz,
8900 MHz, 9400 MHz,
10700 MHz
3001 MHz; 3500 MHz; 4000 MHz;
5100 MHz; 6000 MHz; 6001 MHz;
6500 MHz
6501 MHz; 7200 MHz; 7201 MHz;
7300 MHz; 7301 MHz; 8100 MHz;
8900 MHz; 8901 MHz; 9400 MHz;
9401 MHz; 9800 MHz; 10700 MHz;
10701 MHz; 11700 MHz; 12750 MHz
RFmax is the maximum output frequency of the instrument according to its frequency
option (6 GHz or 12.75 GHz).
For high-resolution measurements in the entire frequency range, a logarithmic
frequency grid in 1-2-5 sequence is recommended up to 50 MHz; above this value,
linear 50 MHz steps should be used up to the upper limit frequency.
Service Manual 1173.9111.02 -06
12
R&S SGS100A
Performance Test
Test Procedures
The recommended test levels are at the upper and lower switching threshold of the
attenuator. The electronic attenuator of the DUT is switched depending on frequency,
modulation parameters and level according to an internal stored table in approximately
6 dB steps. The switching thresholds can be detected under Attenuator fixed range in
the Level menu. After setting all other parameters, the threshold level can be detected
by level variation.
The level at which the attenuator fixed range changes is the threshold. By measuring
at the last level setting of one range and the first level setting of the next range, the
internal setting range borders are used. In the following, Pmax is the highest level before
switching the attenuator, and Pmin is defined as Pmax – 7 dB for the electronic step
attenuator R&S SGS-B26.
1.4 Test Procedures
1.4.1 Reference Frequency
1.4.1.1
Internal Reference Mode
Important: Allow the DUT to warm up for at least 2 hours before starting the
measurement.
Test equipment
-
RF power meter, (item 8)
Frequency counter (item 1)
Test setup
 Connect an RF power meter to the REF OUT output (on rear
panel).
Measurement
 Measure the output level. It should be within the data sheet
specifications.
DUT setting: Internal Reference, Ref Output Frequency set to
10 MHz / 1000 MHz
Test setup
 Connect a calibrated frequency counter to the REF OUT output
(on rear panel).
Measurement
 Measure the frequency.
DUT setting: Internal Reference, Reference output set to
10 MHz / 1000 MHz
 The frequency deviation must not exceed the sum of
deviations resulting from the frequency error in the rated
temperature range and from aging.
Service Manual 1173.9111.02 -06
13
R&S SGS100A
Performance Test
Test Procedures
1.4.1.2
External Reference mode
Test equipment
Frequency counter (item 1)
Signal generator (item 5)
RF power meter (item 8)
-
Test method
The external reference input frequency of the DUT is varied according
to the data sheet and the RF output signal frequency is controlled with
a frequency counter to follow this variation. The Reference output
level is tested.
Preparation of
measurement
 Connect the signal generator RF output to the REF IN input for the
external reference (on rear panel) of the DUT. Connect a
calibrated frequency counter to the RF output. Synchronize the
signal generator and the frequency counter.
Setting on DUT:
- RF on
- Level: 0 dBm (suitable level for the frequency counter)
- Frequency: 1 GHz
- Setup Reference Oscillator
 Source: External
 Ext Ref Frequency: 10 MHz
 REF/LO Output: REF
 Output Frequency: 10 MHz
Setting on signal generator:
- RF on
- Level: 0 dBm
Measurement
 Set the generator frequency to the nominal Ext Ref frequency +/10 ppm. Measure the output frequency of the DUT.
There must be no relative frequency error and no error message in
the display of the DUT.
 Connect the frequency counter to the DUT Ref Out connector.
Measure the Ref Out frequency. There must be no relative
frequency error compared to the Ext Ref frequency delivered to
the DUT.
 Connect a RF power meter to the DUT Ref Out connector. The
Ref Out level shall be within the data sheet specifications.
 Repeat the measurement for following combinations:
Ext Ref
Frequency
Ext Ref
Level
Ref Output
Frequency
Ref Out Level
Limit
10 MHz
0 dBm
10 MHz
see data sheet
10 MHz
0 dBm
1000 MHz
see data sheet
100 MHz
0 dBm
100 MHz
see data sheet
100 MHz
0 dBm
1000 MHz
see data sheet
1000 MHz
0 dBm
1000 MHz
see data sheet

Service Manual 1173.9111.02 -06
14
R&S SGS100A
Performance Test
Test Procedures
1.4.2 Frequency
1.4.2.1
Frequency Setting
Test method
The frequency setting is tested by running the internal synthesizer
adjustments to check the frequency overlap of the VCOs
Measurement
Run: Setup  Internal Adjustments  Adjust Synthesis
There must be no error message.
1.4.2.2
Setting Time
Test assembly
See section "Test Assembly for Setting Time", page 11.
Test method
The spectrum analyzer operates as an FM demodulator. A
controller transmits the start and the stop frequency via the LAN
interface by a special remote command. The DUT trigger
connector on the rear panel is programmed as trigger pulse output.
The analyzer is triggered by the signal generated on the DUT trigger
output. At switch over from start to stop frequency, the settling
procedure is displayed on the screen of the analyzer.
 Synchronize the reference frequencies of the DUT and the
analyzer.
 Make LAN and RF connections.
 Connect spectrum analyzers trigger connector to DUT trigger
output
Settings on DUT:
- :CONNector:TRIGger:OMODe MLATency
- Frequency: start frequency unmodulated,
- Level Settings/Setting Characteristic: Auto,
- Level: 0 dBm,
Settings on spectrum analyzer:
- AMPT/REF LEVEL 0 dBm
- FREQ/CENTER/STOP FREQUENCY
- FM DEMOD ON
- DEMOD BW 100 kHz
- RANGE /DEVIATION PER DIV 200 Hz
- MEAS TIME 2 ms
- TRIGGER EXTERN
- External triggering by positive edge at 1.4 V.
Preparation of
measurement
Service Manual 1173.9111.02 -06
15
R&S SGS100A
Performance Test
Test Procedures
Measurement
Service Manual 1173.9111.02 -06
 Settings on analyzer: - Set the analyzer to the stop frequency
 Set the DUT to the start frequency fstart
 Send the stop frequency fstop from the controller to the DUT by
using the command
:TEST:SPEED Stop frequency, Test level
 The externally triggered analyzer displays the settling curve.
The setting time is defined as the time required to make the
frequency deviation from the stop frequency less than the
specified deviation in the data sheet.
 Switch on IQ-Modulation:
I/Q Settings menu:
Source Analog Wideband I/Q Input
State On
and supply 0.5 V DC to the Iext Input
Repeat the measurement
16
R&S SGS100A
Performance Test
Test Procedures
Recommended test
frequencies and modes
Service Manual 1173.9111.02 -06
fstart
fstop
Mode
79.9 MHz
6000 MHz
CW
6000 MHz
79.9 MHz
CW
93.7 MHz
93.8 MHz
CW, IQ
93.8 MHz
93.7 MHz
187.4 MHz
187.6 MHz
187.6 MHz
187.4 MHz
374.9 MHz
375.1 MHz
375.1 MHz
374.9 MHz
749.9 MHz
750.1 MHz
750.1 MHz
749.9 MHz
1499.9 MHz
1500.1 MHz
1500.1 MHz
1499.9 MHz
2999.9 MHz
3000.1 MHz
3000.1 MHz
2999.9 MHz
3000.1 MHz
6000 MHz
6000 MHz
3000.1 MHz
79.9 MHz
6000.1 MHz
6000.1 MHz
79.9 MHz
79.9 MHz
12750 MHz
12750 MHz
79.9 MHz
5999.9 MHz
12750 MHz
12750 MHz
5999.9 MHz
6000.1 MHz
12750 MHz
12750 MHz
6000.1 MHz
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW, IQ
CW
CW
CW
CW
CW, IQ
CW, IQ
CW, IQ
CW, IQ
17
R&S SGS100A
Performance Test
Test Procedures
Example of Measurement:
IFB
1 MHz
AQT
1 ms
Marker 1 [T1 ]
94.964309692 Hz
Ref
0 Hz
Att
30 dB
334.935897 µs
*
500
A
400
SGL
1 SA
CLRWR
TRG
300
200
1
100
0
-100
-200
-300
-400
-500
Center 750.1 MHz
Date: 12.MAR.2012
100 µs/
16:08:54
The marker is set to the time when the trace enters the specified interval of 750.1 MHz ± 150 Hz. The
setting time is 335 µs.
Service Manual 1173.9111.02 -06
18
R&S SGS100A
Performance Test
Test Procedures
1.4.3 Spectral Purity
1.4.3.1
Harmonics
Test equipment
RF analyzer (item 19)
Test setup
 Connect the RF analyzer to the RF output of the DUT.
 Synchronize the reference frequencies of analyzer and DUT.
Measurement
Settings on analyzer:
Reference level = 20 dBm, 10 dB/div.
Span 0 Hz,
Resolution bandwidth 10 kHz
Settings on DUT:
- Frequency: test frequencies, unmodulated
- Level: test levels
 First measure the level of the fundamental Pf at the test
frequency f as a reference. Then measure the signal levels P2*f
and P3*f at twice and three times the carrier frequency f.
 The harmonic spacing is the measured harmonic level
referred to the fundamental:
HD2 = Pf - P2*f
HD3 = Pf – P3*f
(in dBc = referred to the carrier)
Recommended test
frequencies and levels
Test frequencies:
1 MHz; 5.001 MHz; 10.01 MHz; 20.01 MHz; 40.01 MHz;
60.01 MHz; 80 MHz; 80.01 MHz; 93.75 MHz; 93.76 MHz;
120 MHz; 187.5 MHz; 187.6 MHz; 265 MHz; 375 MHz;
375.1 MHz; 530 MHz; 750 MHz; 750.1 MHz; 1060 MHz;
1500 MHz; 1501 MHz; 2120 MHz; 3000 MHz; 3001 MHz;
3500 MHz; 4000 MHz; 5100 MHz; 6 GHz; 6001 MHz;
6500 MHz; 6501 MHz; 7200 MHz; 7201 MHz; 7300 MHz;
7301 MHz; 8100 MHz; 8900 MHz; 8901 MHz; 9400 MHz;
9401 MHz; 9800 MHz; 10700 MHz; 10701 MHz; 11700 MHz;
12750 MHz
Test level: +8 dBm
 Repeat the measurement with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband Off
and supply 0.5 V DC to the Iext Input
Test frequencies: 80 MHz; 80.01 MHz; 93.75 MHz; 93.76 MHz;
120 MHz; 187.5 MHz; 187.6 MHz; 265 MHz; 375 MHz;
375.1 MHz; 530 MHz; 750 MHz; 750.1 MHz; 1060 MHz;
1500 MHz; 1501 MHz; 2120 MHz; 3000 MHz; 3001 MHz;
3500 MHz; 4000 MHz; 5100 MHz; 6 GHz; 6001 MHz;
6500 MHz; 6501 MHz; 7200 MHz; 7201 MHz; 7300 MHz;
7301 MHz; 8100 MHz; 8900 MHz; 8901 MHz; 9400 MHz;
9401 MHz; 9800 MHz; 10700 MHz; 10701 MHz; 11700 MHz;
12750 MHz
Test level: +8 dBm
Service Manual 1173.9111.02 -06
19
R&S SGS100A
Performance Test
Test Procedures
1.4.3.2
Subharmonics
Test equipment
RF analyzer (item 19)
Test setup
 Connect the spectrum analyzer to the RF output of the DUT.
 Synchronize the reference frequencies of analyzer and DUT.
Measurement
 First the level of the fundamental is measured as reference,
then a signal is searched for at 0.5*test frequency and 1.5*test
frequency.
 The subharmonic spacing is the measured level referred to
the reference level (dBc = referred to the carrier).
Recommended test
frequencies and levels
125 MHz to 12750 MHz in 125 MHz steps
level: Pmin
1.4.3.3
Nonharmonics
Test equipment
RF analyzer (item 19)
Test setup
 Connect the RF analyzer to the RF output of the DUT.
 Synchronize the reference frequencies of analyzer and DUT.
Measurement
Setting on DUT
Level = 0 dBm
 First the carrier level Pf is measured at the test frequency f as
reference and then the signal level Psearch is measured at the
analyzer search frequency.
 The nonharmonic spacing D is the measured level referred to
the reference level:
D = Pf - Psearch
(in dBc = referred to the carrier)
Note:
Service Manual 1173.9111.02 -06
Some of the nonharmonics suppression values to be
measured might be outside analyzer specifications. In
case of doubt, repeat the measurement with a 3 dB
attenuator pad at the analyzer input. If the nonharmonics suppression changes the nonharmonics are
due to the analyzer. Because of the bell-shaped noise
of the analyzer near the carrier, smaller resolution
bandwidths may have to be used. To exclude
amplitude independent nonharmonics of the analyzer,
use a second generator with different synthesis
architecture.
20
R&S SGS100A
Performance Test
Test Procedures
Recommended settings and search frequencies:
DUT Frequency
75 MHz
75 MHz
80 MHz
52.638421053 MHz
55.562777778 MHz
58.831176471 MHz
62.508125000 MHz
66.675333333 MHz
71.437857143 MHz
1000.050000000 MHz
2000.150000000 MHz
3000.150000000 MHz
3000.150000000 MHz
4000.065000000 MHz
4017.915178571 MHz
4056.893522727 MHz
4400.132000000 MHz
4419.760714286 MHz
4454.698181818 MHz
4480.134400000 MHz
4500.065000000 MHz
4613.689090909 MHz
5091.003636364 MHz
5142.931428571 MHz
5250.115500000 MHz
5409.137272727 MHz
5625.081250000 MHz
5920.177600000 MHz
5946.587142857 MHz
5966.113636364 MHz
5999.740000000 MHz
Analyzer search frequency
25 MHz
50 MHz
40 MHz
fc + 130 kHz
fc + 130 kHz
fc + 260 kHz
fc + 260 kHz
fc + 260 kHz
fc + 130 kHz
fc + 200 kHz
fc + 75 kHz
fc + 50 kHz
fc + 150 kHz
fc + 65 kHz
fc + 130 kHz
fc + 130 kHz
fc + 240 kHz
fc + 240 kHz
fc + 240 kHz
fc + 240 kHz
fc + 130 kHz
fc + 80 kHz
fc + 130 kHz
fc + 130 kHz
fc + 154 kHz
fc + 60 kHz
fc + 260 kHz
fc + 240 kHz
fc + 240 kHz
fc + 240 kHz
fc + 130 kHz
Repeat the measurement with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband On
and supply 0.5 V DC to the Iext Input
Service Manual 1173.9111.02 -06
21
R&S SGS100A
Performance Test
Test Procedures
1.4.3.4
Non-systematic nonharmonics
Measurement
Settings on DUT:
Test frequencies: 25 MHz, 60 MHz, 100 MHz, 170 MHz,
320 MHz, 560 MHz, 1000 MHz, 1900 MHz, 2900 MHz,
3000 MHz, 4500 MHz, 6000 MHz, 8000 MHz, 10000 MHz,
12750 MHz
Test level 0 dBm unmodulated
Recommended settings on analyzer:
- Max peak detector
- Filter Type: FFT
- Ref-Level 0 dBm
 Set analyzer center frequency to 1 GHz, span to 40 MHz and
resolution bandwidth to 2 kHz
- Measure carrier level P
- all signals other than the carrier must be below specified value
 Set analyzer span to 100 kHz and resolution bandwidth to
200 Hz
- all signals other than the carrier must be below specified value
 Repeat the measurement with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband On
and supply 0.5 V DC to the Iext Input
Note:
Service Manual 1173.9111.02 -06
Some of the nonharmonics suppression values to be
measured might be outside analyzer specifications. In
case of doubt, repeat the measurement with a 3 dB
attenuator pad at the analyzer input. If the
nonharmonics suppression changes the nonharmonics are due to the analyzer. Because of the bellshaped noise of the analyzer near the carrier, smaller
resolution bandwidths may have to be used. To
exclude amplitude independent nonharmonics of the
analyzer, use a second generator with different
synthesis architecture.
22
R&S SGS100A
Performance Test
Test Procedures
1.4.3.5
Wideband Noise
Test equipment
RF analyzer (item 19)
Test setup
 Connect the RF analyzer to the RF output of the DUT.
 Synchronize the reference frequencies of analyzer and DUT.
Test method
The carrier power is measured first. Then the center frequency of
the analyzer is increased by 10 MHz and the noise power in a
small bandwidth is measured. The difference of the carrier power
and the noise power in 1 Hz bandwidth, which is calculated from
the measurement, is defined as wideband noise. Because
wideband noise degrades with lower electronic levels at the output
step attenuator input, the output level of the generator has to be
set to the lowest level before switching the step attenuator.
Measurement
 Settings on DUT equipped with Step Attenuator (Option :
- frequency: test frequency
- Level: 12 dBm
- determine Att-fixed range upper Level Pupper:
-  RF  Level Att fixed range  upper
- ATT MODE fixed
- set level to Pupper – 7 dB
 Settings on DUT without Step Attenuator (Option :
- frequency: test frequency
- Level: 12 dBm
 Settings on analyzer:
- center: test frequency
- reference level DUT Level + 1 dB
- Attenuator Dmin = DUT Level - P1dBM + 5 dB  round to next
larger available Attenuation of the analyzer (P1dBM = analyzer
P1dB level at test frequency)
- span 110 kHz
- Detector RMS
- Sweep Time Manual 1s
- switch on channel power measurement with 100 kHz
bandwidth
 Determine the channel power with the center frequency of the
analyzer set to the test frequency and note it down as Pref.
 Increase the analyzer center frequency by 9.9 MHz for carrier
frequencies up to 6 GHz and by 29.9 MHz for carrier
frequencies > 6 GHz to 12.75 GHz.
 Inhibit the switching of the attenuator with AMPT RF ATTEN
MANUAL without entering a value so that the input mixer is not
overdriven.
 Lower the reference level of the analyzer by 20 dB, read the
new channel power Pnoise.
 Minimize the output level on the DUT by means of RF OFF,
read the channel power Pres.
Service Manual 1173.9111.02 -06
23
R&S SGS100A
Performance Test
Test Procedures
Evaluation
 If the power
Pres < Pnoise - 0.41 dB
the inherent noise power of the analyzer can be subtracted:
W _ Noise   Pref  10 * log 10(10 Pnoise/ 10  10 Pr es / 10 )  50dB
 If the power
Pres > Pnoise - 0.41 dB
the analyzer resolution is not sufficient for a precise
measurement. The true result is in such case certainly more
than 10 dB below the measured value. The result then is at
least:
W _ Noise   Pref  Pnoise  50dB  10dB
The difference between the (possibly corrected) power Pnoise in
dBm and the power Pref in dBm is the broadband noise floor in
dBc.
Recommended test
frequencies
Service Manual 1173.9111.02 -06
 1 MHz; 5.001 MHz; 10.01 MHz; 20.01 MHz; 40.01 MHz;
60.01 MHz; 80 MHz; 80.01 MHz; 93.75 MHz; 93.76 MHz;
120 MHz; 120.1 MHz; 187.5 MHz; 187.6 MHz; 265 MHz;
375 MHz; 375.1 MHz; 530 MHz; 750 MHz; 750.1 MHz;
1059 MHz; 1500 MHz; 1501 MHz; 2120 MHz; 3000 MHz;
3001 MHz; 3500 MHz; 4000 MHz; 5100 MHz; 6 GHz;
6001 MHz; 6500 MHz; 6501 MHz; 7200 MHz; 7201 MHz;
7300 MHz; 7301 MHz; 8100 MHz; 8900 MHz; 8901 MHz;
9400 MHz; 9401 MHz; 9800 MHz; 10700 MHz; 10701 MHz;
11700 MHz; 12750 MHz
 Repeat the measurement with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband On
and supply 0.5 V DC to the Iext Input
24
R&S SGS100A
Performance Test
Test Procedures
1.4.3.6
SSB Phase Noise
Test assembly
Connect Phase Noise Analyzer (item 6) to RF socket of the DUT.
Test method
The SSB phase noise of the DUT can be measured directly using a
Phase Noise Test Set. A R&S FSUP or any other analyzer with
phase noise option is suitable if its own phase noise is at least 6 dB
less than the guaranteed DUT phase noise.
Measurement
Set the level of the DUT to 10 dBm and measure the phase noise
at 20 kHz offset with the analyzer in phase noise mode.
Recommended test
frequencies
 1 GHz, 2 GHz, 4 GHz, 6 GHz, 8 GHz, 10 GHz, 12 GHz
 Repeat the measurement with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband On
and supply 0.5 V DC to the Iext Input
Service Manual 1173.9111.02 -06
25
R&S SGS100A
Performance Test
Test Procedures
1.4.3.7
Residual FM
Test assembly
Connect RF analyzer to RF socket of the DUT.
Test method
The FM demodulator of the analyzer is used to FM-demodulate the
CW signal of the DUT. By setting the AF-low-pass and high-passfilters the RMS value in the desired bandwidth can be measured.
The value displayed is the sum of the analyzer residual FM and the
DUT residual FM. Because both components are uncorrelated, the
displayed result is worse than residual RMS of the DUT alone.
Therefore, if the sum is in tolerance according to the data sheet the
DUT is also in tolerance.
Measurement
 Settings on DUT:
- frequency: 1 GHz
- Level: 0 dBm
 Settings on analyzer:
- CENTER: 1 GHz
- REFERENCE LEVEL: 1 dBm
- FM DEMOD
- FM DEMOD  MEAS TIME: 100 ms
- FM DEMOD  DEMOD BW: 200 kHz
- FM DEMOD  AF-FILTER  HIGH PASS AF FILTER:
300 Hz
- FM DEMOD  AF-FILTER  LOW PASS AF FILTER: 3 kHz
 The Residual FM in the frequency range 300 Hz – 3 kHz is the
RMS value displayed.
 Repeat the measurement with setting the HIGH PASS AF
FILTER: to 20 Hz and the LOW PASS AF FILTER to 23 kHz.
Service Manual 1173.9111.02 -06
26
R&S SGS100A
Performance Test
Test Procedures
Example:
IFB 2 MHz
Ref
0 Hz
Att
30 dB
AQT 50 ms
200k
A
150k
1 AP
CLRWR
100k
50k
0
-50k
-100k
-150k
-200k
Center 1 GHz
5 ms/
Frequency Modulation Summary
Coupling
DC
Deviation
+peak
-peak
peak/2
RMS
Date: 22.FEB.2008
Carrier Offset
12.93 Hz
-12.41 Hz
12.67 Hz
3.465 Hz
45.639 Hz
Carrier Power
Modulation Frequency
-0.91 dBm
--- Hz
Sampling Rate
Record Length
Demod Bandwidth
AF Filter
250
12501
200
20
23
HP
LP
kHz
kHz
Hz
kHz
17:35:25
Residual FM = 3.465 Hz
Service Manual 1173.9111.02 -06
27
R&S SGS100A
Performance Test
Test Procedures
1.4.3.8
Residual AM
Test assembly
Connect RF analyzer to RF socket of the DUT.
Test method
The FM demodulator of the analyzer is used to AM-demodulate the
CW signal of the DUT. By setting the AF-low-pass and high-passfilters the RMS value in the desired bandwidth can be measured.
The value displayed is the sum of the analyzer residual AM and
the DUT residual AM. Because they are uncorrelated, the
displayed result is worse than residual RMS of the DUT alone.
Therefore, if the sum is in tolerance according to the data sheet the
DUT is also in tolerance.
Measurement
 Settings on DUT:
- frequency: 1 GHz
- Level: 0 dBm
 Settings on analyzer:
- CENTER: 1 GHz
- REFERENCE LEVEL: 1 dBm
- AMPT  RF ATTEN MANUAL: 10 dB
- FM DEMOD
- FM DEMOD  RESULT DISPLAY  AM
- FM DEMOD  MEAS TIME: 100 ms
- FM DEMOD  DEMOD BW: 200 kHz
- FM DEMOD  AF-FILTER  HIGH PASS AF FILTER: 20 Hz
- FM DEMOD  AF-FILTER  LOW PASS AF FILTER: 20 kHz
- SETUP  SIGNAL SOURCE  YIG FILTER: OFF
 The Residual AM in the frequency range 20 Hz – 23 kHz is the
RMS value displayed.
Test frequencies
5 MHz, 450 MHz, 1 GHz, 2.2 GHz, 3.2 GHz, 4.5 GHz, 6 GHz,
8 GHz, 10 GHz, 12.75 GHz
Service Manual 1173.9111.02 -06
28
R&S SGS100A
Performance Test
Test Procedures
Example:
IFB 2 MHz
Ref
0 %
* Att
5 dB
AQT 200 ms
80
A
60
1 AP
CLRWR
40
20
0
-20
-40
-60
-80
Center 1 GHz
20 ms/
Amplitude Modulation Summary
Modulation Depth
0.022 %
Modulation +peak
-peak
0.022 %
-0.023 %
peak/2
RMS
Date: 25.FEB.2008
0.022 %
0.005 %
Carrier Power
-0.87 dBm
Modulation Frequency
Sampling Rate
Record Length
Demod Bandwidth
AF Filter
HP
LP
--- Hz
250 kHz
50001
200 kHz
20 Hz
23 kHz
16:33:44
Residual AM = 0.005 %
Service Manual 1173.9111.02 -06
29
R&S SGS100A
Performance Test
Test Procedures
1.4.4 Level Data
1.4.4.1
Level Uncertainty
Test method
The level uncertainty is measured in two steps. First, the frequency
response is measured at a fixed level with high frequency resolution.
Then the level dependant uncertainty is measured at fixed
frequencies over the specified range.
Test equipment
-
RF power meter (item 8)
RF analyzer (item 19)
Test method for levels in measurement range of power meter
Test setup
Connect power meter to RF output socket.
Measurement

Recommended test
levels for frequency
response measurement

Setting on DUT:
- Levels : test level
- Level SettingsSetting Characteristic: Auto
Measure the level Pabsolute at the recommended test frequencies up
to RFmax.
 The level error is the deviation of the measured level from the
set value.
 Repeat the measurement with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband On
and supply 0.5 V DC to the Iext Input
Use test frequencies according to the recommended test frequency
set starting at 80 MHz up to RFmax
ALC Mode AUTO
Option :
+15 dBm
Without Option : +15 dBm; 0 dBm
Recommended test
CW mode: 1 MHz; 5 MHz to 75 MHz in 10 MHz steps; 80 MHz;
frequencies for the level
CW and IQ mode: 80.01 MHz; 87.5 MHz to 12.75 GHz in 25 MHz
frequency response
Steps
measurement
Measurement of level dependent uncertainty for instruments with no step attenuator (w/o
R&S SGS-B26)
Recommended test
-10 dBm to 15 dBm in 3 dB steps
levels
Recommended test
1 MHz; 80 MHz; 80,01 MHz; 487.5 MHz; 1087.5 MHz, 2187.5 MHz,
frequencies.
3187.5 MHz, 4012.5 MHz, 5012.5 MHz, 5987.5 MHz, 7012.5 MHz,
8012.5 MHz, 9012.5 MHz, 10012.5 MHz, 11012.5 MHz,
12012.5 MHz, 12737.5 MHz
Service Manual 1173.9111.02 -06
30
R&S SGS100A
Performance Test
Test Procedures
Test method for low levels
Test principle
Low levels can only be measured using a frequency selective
measurement instrument. Spectrum analyzers with digital IF are
best suited for this measurement due to their low linearity error.
The absolute accuracy of these analyzers is not sufficient for this
measurement. So a relative measurement referred to the
measurements performed with the power meter is used to increase
the accuracy of the measurement.
Only by switching the input attenuator and preamplifier (when
available) of the analyzer the needed dynamic range of more than
120 dB can be reached. After switching the analyzer attenuator or
preamplifier, a continuity calibration is to be carried out. It is
therefore recommended to switch the attenuator not until reaching
50 dB under full scale, since the linearity errors are very small in
this range.
Test setup
 Connect the spectrum analyzer to the RF output of the DUT
with precision RF measurement cables.
Measurement
 Settings on DUT
Frequency recommended test frequencies
Level +15 dBm, unmodulated
 Setting on the analyzer
Test frequency
SPAN 10 Hz
FILTER TYPE FFT
RES BW 5 Hz
set Marker to test frequency
Reference level Pref = +17 dBm
 Read the marker level PMarker and calculate the correction factor
C = Pabsolute - PMarker
with Pabsolute from the measurements performed with the power
meter.
 Now decrease the DUT level in 5 dB steps and calculate the
output power P by adding the Correction factor C to the marker
readout.
 As soon as the marker level PAtt1 is lower than Pref -45 dB
increase the sensitivity of the analyzer by reducing the input
attenuation, switching on the internal preamplifier if available
and reducing the resolution bandwidth to 1 Hz for levels below 90 dBm. Set the analyzer reference level to PAtt1 + 1 dB. After
switching the analyzer sensitivity read out the marker level PAtt2
and recalculate the Correction factor:
Cnew = Cold + PAtt1- PAtt2
 Instruments equipped with Option R&S SGS-B26:
Continue the measurement down to -120 dBm in 5 dB steps.
Instruments without Option R&S SGS-B26:
Continue the measurement down to 0 dBm in 5 dB steps.
Recommended test
frequencies.
1.02 MHz, 77.5 MHz, 512.5 MHz, 1087.5 MHz, 2187.5 MHz,
3187.5 MHz, 4012.5 MHz, 5012.5 MHz, 5987.5 MHz, 7012.5 MHz,
8012.5 MHz, 9012.5 MHz, 10012.5 MHz, 11012.5 MHz,
12012.5 MHz, 12737.5 MHz
Service Manual 1173.9111.02 -06
31
R&S SGS100A
Performance Test
Test Procedures
1.4.4.2
Output Impedance
Test assembly
See section "Test Assembly for Output Impedance (VSWR)",
page 10.
Test method
For the VSWR measurement of a source the effect of the level
control must be taken into account. For this purpose, an auxiliary
generator is used which transmits a wave with a slightly offset
carrier frequency into the DUT. The difference frequency has to be
within the control bandwidth of the level control. In the case of ideal
source impedance, the wave from the auxiliary generator is not
reflected by the DUT. In the case of not ideal DUT source
impedance, the output wave of the DUT and the reflected wave of
the auxiliary generator are superimposed on one another. A
directional coupler couples a part of these outgoing superimposed
waves to an analyzer. The frequency offset, results in a beat of the
superimposed outgoing waves. The VSWR is the ratio between the
maximum and minimum amplitude of the beat.
Measurement
 Settings on DUT:
- Level: test level
- Frequency: test frequency, unmodulated
- Increase the level control bandwidth using the command
CALibration:LEVel:BWIDth HIGH
 Settings on spectrum analyzer:
- Test frequency, span 0 Hz, test level
- Resolution and video bandwidth 10 kHz
- Linear level scale
- Sweep time 20 ms
 Settings on second signal generator:
- set the frequency to the test frequency – 100 Hz,
- set minimum level, unmodulated.
 Vary the reference level to bring the line displayed on the
screen of the spectrum analyzer approximately into the middle
of the screen. Measure the voltage of the signal Vref.
 Unscrew the VSWR bridge from the DUT and let the test port
open. Increase the level of the second signal generator until the
voltage on the analyzer is Vref ± 0.5 %.
 Screw the VSWR bridge onto the DUT again.
 Measure the maximum voltage Vmax and minimum voltage
Vmin of the sinusoidal trace. Calculate the VSWR:
VSWR = Vmax/Vmin
Recommended test
frequencies and levels

Test frequencies: from 1 MHz every 50 MHz up to RFmax.
Service Manual 1173.9111.02 -06
Test levels for instruments equipped with Option R&S SGSB26: first the (frequency dependent) switching level of the first
step attenuator has to be determined). 3 dB above is the first
measurement level. Then the first five attenuator steps are
measured by reducing the level in steps of 6 dB. This way all
possible output impedances are recorded.
Test level for instruments without Option R&S SGS-B26: 0 dBm
32
R&S SGS100A
Performance Test
Test Procedures
1.4.4.3
Setting Time
Test assembly
See section "Test Assembly for Setting Time", page 11.
Test method
The RF analyzer is operated as a fast level meter in zero span. A
controller transmits the start and the stop level via the LAN interface
by a special remote command. The DUT trigger connector on the
rear panel is programmed as trigger pulse output. The analyzer is
triggered by the signal generated on the DUT trigger output. At switch
over from start to stop level, the settling procedure is displayed on
the screen of the analyzer.
Preparation of
measurement
 Synchronize the reference frequencies of the DUT and the
analyzer.
 Make LAN interface and RF connections.
 Connect the spectrum analyzer trigger input to the DUT trigger
output
 Setting on DUT:
- :CONNector:TRIGger:OMODe MLATency
- Frequency: test frequency
- Level: start level
 Settings on spectrum analyzer:
- REFERENCE LEVEL: target level + 3 dB
- AMPLITUDE LOG RANGE 10 dB
- RESOLUTION BANDWIDTH 200 kHz
- VIDEO BANDWIDTH 2 MHz
- SPAN 0 Hz
- SWEEP TIME: 1 s / 2 ms
- TRIGGER EXTERN
- External triggering by positive edge at 1.4 V.
Measurement
 Send the stop level from the controller to the DUT by using the
command
:TEST:SPEED Test frequency, Stop level.
 The externally triggered analyzer displays the settling curve.
The setting time is defined as the time from which on the level
deviation from the final level (1 second after switch over) is
less than the specified deviation in the data sheet.
 Measure the following steps with Level Characteristic: Auto (ALC
state Table&On)
 Measure the following steps with ALC state On
 Measure the following steps with IQ-Modulation switched on:
I/Q Settings menu:
State On
I/Q Wideband On,
ALC state Table&On
and supply 0.5 V DC to the Iext Input
Service Manual 1173.9111.02 -06
33
R&S SGS100A
Performance Test
Test Procedures
Recommended test
frequencies and levels
Frequencies: 1 MHz, 30 MHz, 375 MHz, 1.1 GHz, 2.2 GHz,
3.2 GHz, 6 GHz, 7.5 GHz, 10 GHz, 12.75 GHz
Start level
Stop level
-10 dBm
15 dBm
15 dBm
-10 dBm
-120 dBm
+15 dBm
-35 dBm
-5 dBm
Remark
Only for instruments
equipped with option
R&S SGS-B26

Service Manual 1173.9111.02 -06
34
R&S SGS100A
Performance Test
Test Procedures
1.4.5 Pulse Modulation (Option R&S SGS-K22)
1.4.5.1
ON/OFF Ratio
Test equipment
- RF analyzer
- Pulse generator
Test setup
To determine the ON/OFF ratio, connect the RF analyzer
to the RF output and leave the TRIG connector of the DUT
unconnected.
Measurement
 Setting on DUT:
RF On
Level 0 dBm
Frequency recommended test frequencies
Pulse Modulation menu:
Source External
State On
Polarity Inverse
 Setting on Analyzer
FREQ/CENTER test frequency
SPAN 0 Hz
AMPT/REF LEVEL 0 dBm
BW  RES BW MANUAL 3 kHz
SWEEP  SWEEP TIME MANUAL 100 ms
MEAS  TIME DOM POWER on
 Determine the output level of the DUT at the
recommended test frequencies with
Pulse Modulation  Polarity Inverse
and
Pulse Modulation  Polarity Normal.
 The level difference between the output level with
Polarity Inverse and Polarity Normal is the ON/OFF
ratio.
Recommended test
frequencies
20 MHz, 80 MHz, 200 MHz to Fmax in steps of 100 MHz
Recommended test level
 Instruments equipped with Option R&S SGS-B26:
- set level to 5 dBm,
- set ATT Mode fixed
- determine Pmin ,
- set level to Pmin
 Instruments without Option R&S SGS-B26: 0 dBm
Service Manual 1173.9111.02 -06
35
R&S SGS100A
Performance Test
Test Procedures
1.4.5.2
Rise/ Fall Time and Pulse Overshoot
Test assembly
See section "Test Assembly for Pulse modulation",
page 11.
Test method
The RF signal is down converted to 0 Hz in phase. Thus,
the IF output reproduces the RF amplitude vs. time.
Measurement
 Setting on pulse generator:
For adjustment statically high level,
for measurement square wave pulse sequence with a
frequency of 1 MHz, TTL level
 Setting on DUT:
RF On
Level 0 dBm
Frequency recommended test frequencies
Pulse Modulation menu:
Source External
State On
 Setting on Signal Generator:
RF On
Level recommended LO-Level of Mixer
Frequency same as DUT
 Setting on oscilloscope:
Adjust V/div according to the mixer in use
Time base 20 ns/div
Trigger:
- for adjustment free running,
- for measurement 50 % of signal amplitude, rising and
falling edge.
 Adjustment: At each test frequency adjust phase using
menu Frequency/Phase / Delta Phase. Vary the Delta
Phase to obtain maximal signal output at the mixers IF
port. The voltage at maximum corresponds to 100 % of
RF amplitude.
 Measurement: Evaluate the down converted pulsemodulated signal on the oscilloscope:

Rise time = time between 10% and 90% of signal
amplitude
Fall time = time between 90% and 10% of signal
amplitude
Pulse Overshoot:
Determine the peak value of demodulated signal Vpeak
and the signal level of settled pulse Vsettled

Pulse Overshoot [in %]
Recommended test
frequencies
Service Manual 1173.9111.02 -06

 100 *
VPeak  Vsettled
Vsettled
700 MHz, 1 GHz to Fmax in steps of 1 GHz
36
R&S SGS100A
Performance Test
Test Procedures
1.4.5.3
Video Crosstalk
Test equipment
- Oscilloscope (item 7)
- Pulse generator (item 11)
Test setup
 To determine the video crosstalk, connect the
oscilloscope input to the RF output socket of the DUT
via a 50 Ω feed through termination, connect the pulse
generator output to the TRIG connector of the DUT and
connect the trigger input of the oscilloscope.
Measurement
 Setting on pulse generator:
Square wave pulse sequence with a frequency of
100 kHz,
TTL level
 Setting on DUT:
RF On
Frequency recommended test frequencies
Level recommended test levels
Pulse Modulation menu:
State On
Source Extern
 Settings on the oscilloscope
Amplitude 150 mV/Div
Sweep Time 10 ns/Div
Bandwidth 500MHz
Trigger Offset -20 ns
Trigger Source Trigger Input
Trigger Level 1.4 V
Trigger Slope positive
 Measure the peak to peak signal level at the rising
edge of the pulse.
Set trigger slope to negative and measure the peak to
peak signal level at the falling edge of the pulse.
 The peak to peak value at the rising and the falling
edge have to be below the guaranteed video crosstalk.
Recommended test
frequencies and levels
 Test frequencies 2 GHz, 3 GHz, 4 GHz, 5 GHz, 6 GHz,
10 GHz
 Test levels 5 dBm, 10 dBm
Service Manual 1173.9111.02 -06
37
R&S SGS100A
Performance Test
Test Procedures
1.4.5.4
Pulse Video Signal
Test equipment
- Oscilloscope (item 7)
Test setup
 Connect the TRIG connector of the DUT to the
oscilloscope.
Measurement
 Setting on DUT:
Pulse Modulation menu:
State On
Source Pulse Generator
Pulse Generator Menu:
Pulse Mode Single
Pulse Width 50 ns
Pulse Period 100 ns
Connector / Trigger Settings Menu:
Connector Mode Video Out
 Settings on the oscilloscope
Amplitude 1 V/Div
Time base 25 ns/Div
Trigger Level 1.4 V
Input impedance 50 Ω
 Check the signal for a symmetric square wave with 100
ns pulse period and 1.65 V ± 0.3 V amplitude.
Service Manual 1173.9111.02 -06
38
R&S SGS100A
Performance Test
Test Procedures
1.4.6 I/Q modulation
1.4.6.1
Input Impedance (VSWR)
Test equipment
See section "Test Assembly for Output Impedance (VSWR)",
page 10.
Test method
Same as for the output impedance of the DUT.
Test setup
Connect the test port of the VSWR bridge to the I or Q input instead of
the RF output.
Measurement

Settings on DUT:
Frequency 900 MHz
RF on
Level 0 dBm (PEP)
I/Q Settings menu:
State On
I/Q Wideband On,
 Settings on signal generator:
- Level: 10 dBm
- Frequency: test frequencies
Let the measuring port of the VSWR bridge unconnected and
measure the level Pref as reference level.
Connect the VSWR bridge to the I input and measure the level PI.
Calculate the VSWR:
VSWR 
1  PI / Pref
1  PI / Pref
Repeat the measurement for the Q input.
Recommended test
frequencies
Service Manual 1173.9111.02 -06
1 MHz, 10 MHz, 20 MHz, 40 MHz, 60 MHz, 80 MHz, 100 MHz,
150 MHz to 500 MHz in steps of 50 MHz
39
R&S SGS100A
Performance Test
Test Procedures
1.4.6.2
Error Vector
Test assembly
See section "Test Assembly for I/Q Modulation", page 11.
Measurement
Instead of a static measurement, an equivalent dynamic measurement
with a low symbol rate is carried out.
 Settings on DUT:
RF On
Level 0 dBm (PEP)




Recommended test
frequencies
Service Manual 1173.9111.02 -06
I/Q Settings menu:
State On
I/Q Wideband Off
Generate a modulation signal on the ARB generator using the
controller and the simulation program:
- Modulation 16QAM
- No coding
- SQR COS filter with  = 0.5
- PRBS-9 data sequence
- Pulse width and over sampling 32
- Length 100 symbols
- Symbol clock 10 kHz
Check if the channels on the ARB generator are equal and adjust
if necessary.
Make the corresponding settings on the demodulator. Result
length 80 symbols.
Measure the error vector magnitude (peak and rms) at the
recommended test frequencies.
80.01 MHz, 250 MHz to 12.75 GHz in steps of 500 MHz
40
R&S SGS100A
Performance Test
Test Procedures
1.4.6.3
Residual Carrier and Leakage
Test equipment
RF analyzer (item 19)
Test setup

Connect the RF analyzer to the RF output of the DUT.
Measurement

Settings on DUT:
RF On
Frequency test frequency
Level 0 dBm
Level menu:
ALC State Off(Table)
I/Q Settings menu:
State Off
I/Q Wideband Off

Settings on analyzer:
FREQ/CENTER = test frequency, SPAN 1 MHz,
AMPT/REF LEVEL = test level


First measure the unmodulated level Pref as a reference.
Then switch on I/Q modulation with 50 Ohm terminated I- and Qinputs (I/Q Settings menu: State On) and measure the residual
carrier level Pcarrier.
 The carrier suppression in dBc is:
Dcarrier = Pref - Pcarrier
in dBc = referred to the carrier.
Set Impairments State to On and Leakage to 2 % on the DUT.
Starting from 100 MHz and then every 100 MHz measure the
residual carrier.

 The residual carrier should increase to 2 % (-34 dBc).
Recommended test
frequencies
Service Manual 1173.9111.02 -06
12.5 MHz to 12737.5 MHz in 25 MHz steps
41
R&S SGS100A
Performance Test
Test Procedures
1.4.6.4
I/Q Imbalance
Measurement of
imbalance
Test equipment
-
Test setup


Connect the spectrum analyzer to the RF output of the DUT.
Connect the Arbitrary waveform generator to the DUT baseband
input.
Measurement

Settings on DUT:
RF On
Frequency 900 MHz
Level 0 dBm (PEP)
Level menu:


Service Manual 1173.9111.02 -06
RF analyzer (item 19)
Arbitrary waveform generator (item 14)
ALC State Off(Table)
I/Q Settings menu:
State On
I/Q Wideband Off
Impairments State on
Imbalance 1.0 dB
Settings on analyzer:
- Center frequency = test frequency, span 1 MHz
- Reference level = test level +3 dB
- Scale 1 dB/div
Apply a DC voltage of 0.5 V to the I-input and 0 V to the Q-input.
Measure the output level PI. Then apply a DC voltage of 0.5 V to
the Q-input and 0 V to the I-input. Measure the level PQ. The
Imbalance is:
Imbalance = PI - PQ
42
R&S SGS100A
Performance Test
Test Procedures
1.4.6.5
Adjacent Channel Power for 3GPP FDD
Test equipment
RF analyzer (item 19)
Arbitrary waveform generator (item 14)
Lowpass filter (item 21)
Test setup



Connect the IQ-modulation source to the Lowpass filter inputs.
Connect the Lowpass filter outputs to the I/Q-inputs of the DUT.
Connect RF analyzer to RF output of DUT.
Test method

Set standard 3GPP FDD Test Model 1-64 in the modulation
source baseband and feed the I/Q signal into the DUT I/Q-inputs.
Perform the measurements with the 3GPP measurement setting of
the R&S FSQ. Use lowpass filtering of the I/Q signals to avoid
degradation of the ACPR measurement by baseband generator
noise.
Measurement

Settings on DUT
Level: 10 dBm (PEP)
Frequency: Test frequency



Recommended test
frequencies
Service Manual 1173.9111.02 -06
I/Q Settings menu:
State On
I/Q Wideband Off
Settings on DUT or signal generator
3GPP FDD:
Test Setups Test_Model_1_64channels
State ON
Settings on analyzer
FREQ CENTER: 2160 MHz
MEAS → CHAN PWR ACP
→ CP /ACP STANDARD WCDMA 3GPP FWD
→ SWEEP TIME 1 sec
→ NOISE CORR ON
→ ADJUST REF LVL
Measure ACP:
Read out Adjacent Channel and Alternate Channel (take the larger
of the two measurement values UPPER/LOWER)
1800 MHz, 2000 MHz, 2200 MHz
43
R&S SGS100A
Performance Test
Test Procedures
1.4.6.6
Frequency Response of Baseband Bypass path
Test equipment
-
RF Power meter (item 8)
Signal generator (item 5)
Test setup

Test method
In the Baseband Bypass mode, the DUT operates like a controllable
gain amplifier with I and Q as input connectors and RF OUT as output
connector.
Connect the RF output of the DUT to the power meter
and connect the signal generator to the I input of the DUT.
By applying a sinewave AC voltage of variable frequency to the I (or Q)
input and measuring the RF OUT level, the frequency response can be
determined.
Measurement



Settings on DUT:
RF On
:SOURce:OPMode |BBBYpass
Level 10 dBm (PEP)
ATT MODE fixed
Setting on signal generator:
Level 4 dBm corresponding to 0.5 V (Vpeak)
Measure the level at RF OUT at the recommended test
frequencies
 The modulation frequency response is the difference between
the highest and the lowest measured sideband level.
Recommended test
frequencies
Service Manual 1173.9111.02 -06
1 MHz, from 10 MHz to 150 MHz in steps of 10 MHz
44
R&S SGS100A
Performance Test
Test Procedures
1.4.6.7
Level linearity of Baseband Bypass path
Test equipment
-
Test setup

Test method
RF analyzer (item 19)
Signal generator (item 5)
Connect the RF output of the DUT to the power meter,
and connect the signal generator to the I input of the DUT.
In the Baseband Bypass mode, the DUT operates like a controllable
gain amplifier with I and Q as input connectors and RF OUT as output
connector.
By applying signal to the I (or Q) input, varying the DUT level setting
and measuring the RF OUT level, the level linearity can be
determined.
Measurement



Settings on DUT:
RF On
:SOURce:OPMode |BBBYpass
Level Test level
ATT MODE fixed
Setting on signal generator:
Level 4 dBm corresponding to 0.5 V (Vpeak)
Frequency: Test frequency
Setting on the analyzer
Test frequency
Reference level = 25 dBm
SPAN 10 Hz
FILTER TYPE FFT
RES BW 5 Hz
set Marker to test frequency
 Read the marker level Pref
 At all test levels, read the marker level PMarker and calculate the
level error referred to Pref.
Recommended test
frequencies
1 MHz, 20 MHz, 80 MHz
Recommended test levels Test levels for instruments equipped with Option R&S SGS-B26:
Set level to 0 dBm and determine Pmax. Use test levels from Pmax
down to Pmax – 20 dB in steps of 1 dB.
Test level for instruments without Option R&S SGS-B26:
15 dBm down to -5 dBm in steps of 1 dB
Service Manual 1173.9111.02 -06
45
R&S SGS100A
Performance Test
Test Procedures
1.4.7 Phase Coherence Levels (Option R&S SGS-K90)
Test assembly
The second Signal generator (item 5) is connected to the LO INconnector and the RF power meter (item 8) is connected to LO OUTconnector.
Test method
A LO-Signal from the second signal generator is fed into the LO input.
With LO-Coupling set to external and the LO-output switched on the
power at the LO-out SMA-connector is measured with the power
meter.
Measurement
 Settings on DUT:
RF: State ON
Level: -30 dBm
Frequency: recommended test frequencies or RFmax, whichever
is lower
Frequency/Phase menu:
LO Coupling  Source Ext
LO Coupling  REF/LO Output LO
 Setting on second signal generator:
- Level: + 7 dBm / + 13 dBm
- Frequency: recommended test frequencies
- RF: State ON
 Set the frequency of the second generator to the recommended
test frequencies. Set the level of the second signal generator to
+7 dBm and measure the level P+7 dBm. Set the level of the
second signal generator to +13 dBm and measure the level P+13
dBm
 The level P+7 dBm and P+13 dBm should be +10 dBm ± 3 dB
 The level difference between P+13 dBm and P+7 dBm should be
less than ± 1 dB
Recommended test
frequencies
80.01 MHz, from 150 MHz every 100 MHz up to 6.5 GHz
1.4.8 PCI Express Interface
Test equipment
-
Test assembly
External device with PCI express Interface is connected to
R&S SGS100A PCI express connector
Measurement

Service Manual 1173.9111.02 -06
PCIe test port (item 24)
PCIe cable (item 23)
Check if external PCI express device can be identified by
R&S SGS100A
46
R&S SGS100A
Adjustment
Procedures after Module Replacement
2 Adjustment
Preliminary Remark
Setting a defined initial state by performing the PRESET operation prior to adjustments
is recommended. In addition, a valid reference frequency is required, either by setting the
instrument to internal reference or by applying an appropriate external reference signal. To
ensure that the internal adjustments are valid at operating temperature, at least
30 minutes warm-up time at this temperature must be observed.
2.1 Procedures after Module Replacement
This chapter describes the necessary measures to restore the performance of the
R&S SGS100A after module replacement.
There are no manual adjustments to be performed. Internal adjustment routines are
implemented for this purpose. In case external adjustment is required, contact your local
Rohde & Schwarz representative.
All spare part boards are tested at Rohde & Schwarz with calibrated working standards
according to the performance test. All measurement values are within the specified values
including the measurement uncertainty as a minimum guard band.
After replacing an assembly, check the following table to see which service procedure is
required.
Changed module
Required
action/adjustment/correction
Recommended Test Procedure
(refer to chapter 1 "Performance Test").
Controller Board
SIM card transfer
Instrument Selftest
Restore Ethernet MAC Adress (see
chapter 2.1.1)
Perform Factory Preset (sets
instrument default hostname)
FW update
Setup/Internal Adjustments/Adjust All
RF Mainboard
Setup/Internal Adjustments/Adjust All
Instrument Selftest
Level uncertainty
(external)*
Reference Frequency / Internal
Reference mode (for instruments without
option R&S SGS-B1)
Setup/Internal Adjustments/Adjust All
Instrument Selftest
Attenuator Switchover Correction
Doubler Board
Level uncertainty
Attenuator Switchover Correction
(external)*
Step Attenuator
Setup/Internal Adjustments/Adjust All
Instrument Selftest
Level uncertainty
Service Manual 1173.9111.02 -06
47
R&S SGS100A
Adjustment
Adding Hardware Options
Changed module
Required
action/adjustment/correction
Recommended Test Procedure
(refer to chapter 1 "Performance Test").
OCXO
Setup/Internal Adjustments/Adjust All
Instrument Selftest
Reference Frequency / Internal
Reference mode
Power Supply
Setup/Internal Adjustments/Adjust All
Instrument Selftest
Fan
None
Functional Test
Front panel unit
None
Keyboard Test (see chapter 3.2.3)
Cables W100,
W100A, W110A
Setup/Internal Adjustments/Adjust All
Functional Test
Level uncertainty
* In case external adjustment is required, contact your local Rohde & Schwarz representative.
2.1.1 Restore Ethernet MAC Adress
Each SGS100A has a unique, fixed MAC Adress to allow the identification in a
Ethernet network. The MAC Address is assigned during the instrument production
process and must not be changed afterwards.
The SGS100A utilizes the MAC Address that is stored on the Controller Board. A
backup of the MAC Address number is stored on the SIM Card. When replacing a
Controller Board, the SIM Card has to be transferred to the new Controller Board and
the MAC Address number has to be copied from the SIM Card to the new Controller
Board using the following procedure:
●
Connect the DUT to a PC via USB. Avoid using a LAN connection, because the
instrument hostname has changed after replacing the Controller Board. In addition,
the network IP-Address may change after the reboot step, if it is set to Auto
(DHCP).
●
Start the instrument and open a remote control connection.
●
Send the command: DIAGnostic:PRODuct:MACaddress:RESTore SIM
●
Reboot the DUT and connect with SGMA GUI
●
Check the MAC Address under Setup -> Network Settings...
●
Compare the MAC-Address to the 12 digit hex number printed on the label on the
bottom side of the DUT.
2.2 Adding Hardware Options
This chapter describes the necessary measures to obtain the extended performance of the
R&S SGS100A after installing an additional Hardware Option.
Service Manual 1173.9111.02 -06
48
R&S SGS100A
Adjustment
Adding Hardware Options
Following Hardware Modules are available:
●
R&S SGS-B1 OCXO
●
R&S SGS-B26 Step Attenuator
●
R&S SGS-B112 Frequency extension CW 12.75 GHz
Only fits to instruments equipped with R&S SGS-B106.
●
R&S SGS-B112V Frequency extension IQ 12.75 GHz
Only fits to instruments equipped with R&S SGS-B106V with RF Mainboard
revision number greater or equal to 6.09.
Note: Instruments with serial numbers lower than 101600 can not be upgraded
with the R&S SGS-B112V option due to the installed RF Mainboard version.
First install the respective Hardware modules according to the step by step instruction
given in chapter 3.
When the hardware installation is fully completed, switch on the instrument and check the
detection of the added modules.
- Setup Menu
- Hardware Config…
Now the available Hardware is displayed.
To activate the Hardware Option, the appropriate Hardware Option Key must be installed
on the instrument SIM Card.
- Setup Menu
- Install Option…
- Option Key: Type the Option Key Number delivered with your HW Option
Restart the instrument and perform the adjustments and tests according to the
following table.
Installed module
Required action/adjustment/correction Recommended Test Procedure
(refer to chapter 1 "Performance
Test").
OCXO
Setup/Internal Adjustments/Adjust All
Instrument Selftest
Reference Frequency / Internal
Reference mode
Doubler Option SGS-B112
or SGS-B112V
Setup/Internal Adjustments/Adjust All
Full Performance Test
Doubler Option SGS-B112
or SGS-B112V
Setup/Internal Adjustments/Adjust All
Full performance Test
(instrument with Step
Attenuator Option SGSB26)
Attenuator Switchover Correction
(external)*
(instrument without Step
Attenuator Option SGSB26)
Service Manual 1173.9111.02 -06
49
R&S SGS100A
Adjustment
Internal Adjustments
Installed module
Required action/adjustment/correction Recommended Test Procedure
(refer to chapter 1 "Performance
Test").
Step Attenuator Option
SGS-B26
Setup/Internal Adjustments/Adjust All
Full performance Test
Step Attenuator Option
SGS-B26
Setup/Internal Adjustments/Adjust All
Full performance Test
(instrument with Doubler
Option SGS-B112
or SGS-B112V)
Attenuator Switchover Correction
(external)*
(instrument without Doubler
Option SGS-B112
or SGS-B112V)
* In case external adjustment is required, contact your local Rohde & Schwarz representative.
After the external correction procedure, reboot the instrument.
2.3 Internal Adjustments
All internal adjustments are available in the Setup/Internal Adjustments menu (see
operating manual).
Performing Setup/Internal Adjustments/Adjust All activates all internal adjustments
in a reasonable order.
2.4 External Adjustments Requiring Measurement
Equipment
The external adjustments have to be performed, if the recommended calibration
interval is exhausted or RF modules or cables have been replaced.
The external adjustments require calibrated equipment and special software. Data
sheet specifications of the unit are concerned. If required, contact your local Rohde &
Schwarz representative.
2.5 Adjustment of internal Reference Frequency
When set to internal reference mode, the frequency accuracy of the synthesizer is
determined by a 10 MHz VTCXO or a highly stable OCXO (Option R&S SGS-B1). The
internal frequency source is set to a calibrated frequency standard at the R&S factory.
This oscillator is subject to ageing and hence its output frequency can be adjusted.
Service Manual 1173.9111.02 -06
50
R&S SGS100A
Adjustment
Internal Self Test
2.5.1 Adjustment
Important: Allow the DUT to warm up for at least 20 minutes before adjustment is
executed
Test equipment
-
External frequency counter (1 Hz to RFmax, resolution 0.1 Hz)
Test setup

Connect a calibrated external frequency counter to the
reference output at the rear panel.
Adjustment
 Setting on DUT:
PRESET
Setup Menu
Protection
Protection Level 2 = 147946 ENTER
 Setting on spectrum analyzer (external frequency
counter):
MKR SIGNAL COUNT
MKR / NEXT CNT RESOL 0.1 Hz
 Adjust the TCXO/ OCXO Calibration Value (Reference
Oscillator – Adjustment - DAC Value) for an external
frequency counter reading of 10 MHz, with minimal
error.
 Set the found value as TCXO/OCXO Custom
Calibration Value in the Service menu (Service – Ext.
Adjustment – TCXO/OCXO Adjustment - Calibration
Value).
 Press Write Value to Eeprom to permanently save the
calibration value.
2.6 Internal Self Test
After each module replacement, it is recommended to perform the internal self test
(refer to chapter 3). The self test checks the instrument by measuring internal
diagnostic points and verifies whether the generator is operating properly.
If a self test failure occurs, check again whether all cables are properly connected. If
the self test fails continuously, contact your local service center.
Service Manual 1173.9111.02 -06
51
R&S SGS100A
Repair
Internal Self Test
3 Repair
A schematic of the signal generator's design is presented below as block diagram at
module level
The R&S SGS100A consists of very few main modules and very few connections
between these modules. The main units are:

Power Supply

Controller Board which includes all digital external interfaces, the main CPU,
the hardware drivers for the front panel and the Interface to the RF Mainboard.

Front Unit consisting of the flexible switch board with keys and LED indicators

RF Mainboard containing the basic RF functionality, the instrument analog and
RF connectors and interfaces to all other modules and HW options.

Doubler Board (Option R&S SGS-B112 or R&S SGS-B112V) containing RF
circuitry to extend the frequency range.

Step Attenuator (Option R&S SGS-B26) containing RF circuitry to extend the
level dynamic range.

Reference Oscillator (Option R&S SGS-B1) which is plugged directly onto the
RF Mainboard.

Fan Unit for forced cooling of the instrument modules
A detailed description of these modules is given in section "Functional Description" on
page 53.
Service Manual 1173.9111.02 -06
52
R&S SGS100A
Repair
Functional Description
3.1 Functional Description
3.1.1 Power Supply Module
The power supply module provides a single 12 V supply voltage for the operation of
the signal generator. It can be switched on and off by means of the power switch on
the rear panel.
The power supply works over a wide input voltage range from 100 V to 240 V (±10 %)
and AC supply frequencies form 50 Hz to 60 Hz (±5 %). The power factor correction
meets EN 61000-3-2.
The secondary voltage is open-circuit-proof and short-circuit-proof.
The primary fuses are located inside the power supply module and cannot be replaced.
Further fuses are fitted on the RF Mainboard as a means of fire protection.
3.1.2 Controller Board
The Controller Board of the signal generator involves the following components and
modules:
3.1.2.1
Switching regulators
Switching regulator modules for 1.0 V, 1.2 V, 1.8 V and 3.3 V supply voltages.
3.1.2.2
Controller
Central Controller of the R&S SGS100A including all memory devices and external
interfaces.
3.1.2.3
FPGA (SIGMA_COM)
Performs data processing for the serial buses, which send setting data to the modules.
It also contains the controllers for the SmardCard, the Keyboard and LEDs. The
SIGMA_COM is configured via an SPI-Interface of the processor.
3.1.2.4
Diagnostic Multiplexer
The diagnostic Multiplexer is used for measuring the supply voltages of the Controller
Board during failure diagnostic.
3.1.2.5
EEPROM
The following data is stored here: Serial number of the instrument, header line data of
the board.
Service Manual 1173.9111.02 -06
53
R&S SGS100A
Repair
Functional Description
3.1.2.6
Temperature sensor
A temperature sensor mounted on the Basis Board monitors the temperature. If a
defined temperature above the guaranteed maximum operating temperature is
exceeded, the modules in the instrument are switched off. So the R&S SGS100A
secures itself against damage due to overheating.
3.1.3 RF Mainboard
The RF Mainboard contains the basic analog hardware of the instrument. The RF
signal is generated by a synthesizer that can be locked to internal or external reference
frequency sources. Analog IQ modulation can be performed when the vector
modulation option is equipped. The output level is controlled by a level control loop
controlling the level driving the instrument output or the optional step attenuator. The
RF Mainboard is controlled by the Controller Board via a serial bus and additional
control signals.
3.1.3.1
Block diagram
0.08..6.5GHz
MIMO_IN
1GHz
1GHz
X201
REF/LO IN
Reference Output
Selector
D_REFOUT
100/10MHz
D_REF1000M
Reference Input
Selector
TCXO
X202
REF/LO OUT
Ref_Out 10/100MHz
Ref_Out
D_REFPD D_REFDIFF
10/100/1000MHz
80...6500MHz
D_REFTUNE
DDS-DAC
10MHz
Reference
Loop
DDS
0.08..6.5GHz
VCO
1GHz
D_PLLDIFF
1...80MHz
D_MIMOUT
D_VCOTUNE
10MHz
SGS-B1
OCXO
0.08..12.75GHz
1GHz
RF_1
D_DDSRF
D_REF250M
X250
Main PLL
3..6.5GHz
VCO
X207
LO_6
X208
LO_12
X407
LO_6
X408
LO_12
X409
AMP12_IN
AMP12_IN
X209
Doubler 6...12.75GHz
1
Filter bank
2
Leveling
X405
D_FILTIN
D_FILTOUT
Doubler
X410
AMP12_OUT
Amplifier
AMP12_OUT
X210
6.00..12.75 GHz
Filter bank
0.08..6.00 GHz
1MHz..12.75GHz
Directional Coupler
X205
RF_OUT
Levelling
1...80 MHz
1...80MHz
Power Amps
X220
RF_IN
D_THERM
X221
RF_OUT
D_ALC
RF Output
D_DETREF
RF_1
IQ-Modulator
(0.08 ... 12.75 GHz)
I
X203
I_IN
Step Attenuator
Thermostat
D_DETLVL
Q
Power supply and control functions
ADC
I external
Detector
I internal
DDS_CAL
X204
Q_IN
DAC
ADC
IQ-Matrix
Q internal
Q external
14
FPG A
DDS
D_ICAL
D_QCAL
D_P12V
Adj. Voltage
X101
LAN
ADC
+12V
D_P24V
+24V
DDS_CAL
Power Supply
Diagnosis Mux 32 Inputs
D_P8V
D_P3V3
Controller
LVDS Fast Bus,
SPI, GPIOs
X102
Cable
PCI express
+8V
X270
+12V
D_P6V
5A
+6V
+3.3V
D_P2V5
12V (Controller)
X212
+2.5V
X105
X103
USB OTG
Micro USB
D_N6V
12V (Controller)
5A
D_P1V1
-6V
+1.1V
D_P3V9
+3.9V
RF Mainboard
Service Manual 1173.9111.02 -06
X104
TRIG
54
R&S SGS100A
Repair
Functional Description
3.1.3.2
Implemented functions












3.1.3.3
Reference crystal oscillator and reference frequency switch
Synthesizer
DDS module
Vector modulator (Option)
Phase coherent input / output (Option)
Harmonics filter
RF amplifiers
Pulse modulator (Option)
Level control
Diagnostics
Power supply for optional RF modules
Control interface for optional RF modules
Internal and external reference
The instrument reference frequency is determined either by the signal supplied by the
built-in 10 MHz TCXO or 10 MHz OCXO (A600 OCXO Board) or by an external
reference signal that is fed to the input X201 REF/LO IN. The external reference
frequency can be set to 10 MHz / 100 MHz / 1000 MHz. The output X202 REF/LO
OUT provides a buffered reference frequency signal, which has been derived from the
active reference source. In internal reference mode, the frequency of the TCXO /
OCXO can be adjusted by a DAC.
3.1.3.4
Main 1000 MHz oscillator
A built-in 1000 MHz Oscillator delivers the internal reference signal for the DDS based
Synthesizer. This source is synchronized to the selected reference signal (internal
TCXO / OCXO or external applied signal) with a PLL. When using an external
1000 MHz reference signal, the internal 1000 MHz source is switched off.
3.1.3.5
RF Synthesizer/ DDS module
The 1000 MHz signal of the main oscillator provides the system clock for the DDS
module. The RF output signal in the frequency range from 1 MHz to 80 MHz is
generated directly by the DDS. The analog RF signal is then low pass filtered,
amplified and fed to the module RF output.
For RF output frequencies above 80 MHz the DDS generates a signal with high
resolution, which is applied as reference signal to the main PLL of the RF frequency
synthesizer. In the synthesizer a VCO is locked to the reference frequency using a
fractional-n-PLL. The VCO output signal is then fed to fixed frequency dividers which
are set to appropriate divider ratios to generate the RF signal from 80 MHz to 6.5 GHz.
The synthesizer signal can also be fed into the optional doubler board to extend the
synthesis output frequency range up to 12.75 GHz. The synthesis signal can also be
switched to the REF/LO OUT connector in phase coherent LO operation mode.
Service Manual 1173.9111.02 -06
55
R&S SGS100A
Repair
Functional Description
3.1.3.6
Vector modulator
The synthesizer / doubler board signal can be routed directly to the following RF chain
or the optional vector modulator, which can multiply the signal by the external analog
I/Q signals. The vector modulator LO signal can also be taken from the REF/LO IN
connector in phase coherent LO operation mode.
3.1.3.7
Harmonics filters
The output signal of the frequency dividers is a square wave signal. To reach the
guaranteed harmonic performance (see datasheet) the harmonics of the RF signal
have to be suppressed. Due to the wide RF frequency range multiple filters are
needed. The different filters are selected according to the RF output frequency and
their cut off frequency. They are inserted into the RF signal path by the means of RF
switches.
3.1.3.8
Automatic Level control
With the means of a directional coupler a small part of the output signal of the power
amplifier is fed to an RF detector. The output signal of this RF detector is fed to the
Automatic Level Control (ALC) unit. The ALC sets the Level Control Voltage controlling
the variable attenuators to reach the desired output level.
3.1.3.9
Fan Controller
The fan for cooling the RF modules is connected to the RF Mainboard and controlled
according to the temperatures of the Controller Board, RF Mainboard, Doubler Board
and Step Attenuator. The highest observed temperature determines the fan speed.
3.1.3.10
Supply voltage control and filtering
The supply voltages required for the RF Mainboard and the optional HW modules are
generated by switched mode converters and filtered by means of passive filtering and
additional active voltage regulators. Linear regulators with very good noise and
distortion suppression characteristics have been implemented based on operational
amplifier circuitry.
Service Manual 1173.9111.02 -06
56
R&S SGS100A
Repair
Functional Description
3.1.4 Doubler Board
3.1.4.1
Doubler Board architecture
The option incorporates a frequency doubler from 3.25 GHz … 6.375 GHz to 6.5 GHz
… 12.75 GHz and means for level control and amplification for the frequency range
from 6 GHz … 12.75 GHz. Frequency doubler and RF-chain are connected to the RF
Mainboard such that the frequency range of the combination extends to 12.75 GHz in
CW mode as well as in vector modulated mode. The doubler board includes an
Eeprom to store specific data, a temperature sensor and a diagnosis system. Control
and power supply is provided by the RF Mainboard.
3.1.4.2
Doubler Board diagram
The following diagram shows the two separated RF-paths of the Doubler Board
consisting of a doubler-path and a RF-chain.
X407
LO_6
X408
LO_12
1
2
X409
AMP12_IN
X410
AMP12_OUT
Power supply and control functions
X405
Figure 3-1: Doubler Board diagram
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Functional Description
3.1.5 Step Attenuator
3.1.5.1
Step Attenuator architecture
The dynamic range of output power from the RF Mainboard is limited due to several
technical restrictions. To achieve very high and extremely low output levels an
attenuator with high dynamic range is required at the output of the instrument. The
attenuation can be switched in 6 dB steps from -114 dB to 0 dB nominal. To overcome
the attenuator loss, an amplifier in the attenuator module output stage can be
activated. The module includes an Eeprom to store specific data, a temperature sensor
and a diagnosis system. Control and power supply is provided by the RF Mainboard.
3.1.5.2
Step Attenuator diagram
The following diagram shows the functional equivalent of the module:
X220
RF_IN
X221
RF_OUT
Power supply and control functions
X700
Control
3.1.5.3
Power Amplifiers
To offer high output power levels despite of the insertion loss of the switching matrix
there are two amplifiers which can be switched into the path at the output of the board.
The amplifiers are split into frequency bands. There is one for the low frequencies from
1 MHz to 6.5 GHz and one for the range from 6.5 GHz to 12.75 GHz.
3.1.5.4
Voltage Regulators and filtering
There are two voltage regulators located at the board connector as the Step Attenuator
is used in multiple instruments with different supply voltages. On the board itself great
efforts have been spent to effectively filter all control voltages to ensure the required
dynamic range.
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Functional Description
3.1.6 R&S SGS-B1 Reference Oscillator
The option incorporates a highly stable 10 MHz OCXO. When attached to the RF
Mainboard, the OCXO determines the reference frequency stability of the
R&S SGS100A synthesizer in internal reference mode. The module includes an
Eeprom to store specific information such as the frequency adjustment data. The
Reference Oscillator module is plugged directly onto the RF Mainboard. Control and
power supply is provided by the RF Mainboard.
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Troubleshooting
3.2 Troubleshooting
The purpose of these troubleshooting instructions is to help to trace down malfunctions
to board level. The instrument can thus be made ready for use again by means of
board replacement.
If error tracing doesn’t show clear results, we recommend that you ship your instrument
to our experts in the service centers (see address list) for module replacement and
further error elimination. Some module replacements involve calibration procedures
requiring calibrated equipment and appropriate software.
DANGER
Danger of shock hazard
For module replacement, ensure that the instrument is switched off
and disconnected from the power supply by removing the plug from
the AC and DC power connector.
Read all safety instructions at the beginning of this manual carefully
before module replacement!
NOTICE
Risk of damage to the boards
Be careful not to cause short circuits when measuring voltages at
pins placed close together!
The following utilities are provided in the signal generator for easy diagnosis
and can be controlled by the R&S SGMA GUI software:




Internal self test
Internal diagnosis test points
Internal adjustments
Info line with error messages and history of messages displayed in R&S SGMA
GUI software
Note:
When problems occur, first check whether any connections (cables, plug-in
connections of boards, etc) are damaged or wrongly connected.
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3.2.1 Measuring Equipment and Accessories
Item
Type of equipment
1
DC voltmeter
2
Spectrum analyzer
3
Multimeter
4
Oscilloscope
Specifications recommended
Frequency range 0 to 26 GHz
Equipment
recommended
R&S
order No.
R&S URE3
0350.5315.03
R&S FSQ
1155.5001.26
Bandwidth ≥ 100 MHz
Hameg HM1500-2
or similar
3.2.2 Switch-On Problems
After switching on the AC power supply via the switch on the back of the instrument,
the following steps happen during the boot process:
Step
1
Visible Effect
Green power LED lights up without
flashing
Operational Requirements





AC Power supply ok,
12 V Fuse on RF Board ok,
Connection from RF Board to
Controller Board ok,
1.0 V and 3.3 V switching
regulator on Controller Board
ok,
Connection of green Front
Panel keypad foil to Controller
Board ok.
2
After 1 second: Green power LED
starts flashing, LED on Controller
Board lights up.

3
After 40 seconds: Green power
LED again lit steadily


Firmware installation intact
Booting successful
4
Device can be accessed from
SGMA-Gui via any of the remote
control ports.

Used port intact and operational
Service Manual 1173.9111.02 -06
Controller operational and starts
booting,
 Successful loading of FPGA
configuration.
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
Error: boot process step 1 not reached
Action
Possible error causes and further
steps
Check voltage on power supply module
output (12.0 V … 12.3 V).

Short circuit on secondary side.
Disconnect power supply module from
RF-Board and recheck voltage on power
supply module.
If it still does not match the rated value,
replace power supply module.
If voltage is correct now, reconnect
boards and fan one by one and search
this way for the module, which causes
the short circuit.
Check Fuses on RF Board.

Check 12 V supply voltage on Controller
Board
If fuses are blown, proceed as described
in section "Fuses" on page 74.
Either Controller Board or RF-Board is
defect.

Check 1.0 V (0.95 V…1.05 V) and 3.3 V
(3.15 V…3.45 V) supply voltages on
Controller Board.
If voltages do not match the rated value,
replace Controller Board.

Check green LED on Controller Board
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If LED is lit, then green Front Panel
keypad foil is defect or not connected
properly to Controller Board.
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3.2.2.1
Test Points on Controller Board
(Controller Board with TAZ  05.00)
(Controller Board with TAZ  03.00)
Note:
The screws of the RF-Board shield may be used as ground potential for
the measurements.
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
Error: boot process step 2 or 3 not reached
Action
Possible error causes and further
steps
Try to reinstall Firmware via Recovery
System.
If not possible, replace Controller Board.

Error: boot process step 4 not reached
Action
Possible error causes and further
steps
Try different remote control port (USB,
Ethernet, PCI Express).
If only one port is not working, check
your cabling and look out for LAN related
problems.
If no other reason is found, replace
Controller Board.
3.2.3 Keyboard and LED Test

This utility allows you to check for proper operation of all front panel elements
Normal action
Error, possible causes and corrective
action
Test called by SGMA-GUI with
Diagnostic/Test – Other Tests - Keyboard
Test - On
or by remote command
:TEST:KEYBoard[:STATe] ON
All LEDs except the Power/Standby
indicator change to orange.
If the LEDs except the Power/Standby
indicator do not light in orange color, the
front panel is defective. Change the
front panel.
Pressing the keys in the order RF ON –
LAN - ID changes the color of all LEDs
except the Power/Standby indicator
simultaneously to Red – Off -Green.
If the color does not change according
to the description, a malfunction has
occurred.
If the color remains unchanged after
actuation, the key is defective.
In either case:
Change the front panel.
Exit the test mode by SGMA-GUI with
Diagnostic/Test – Other Tests - Keyboard
Test - Off
or by remote command
:TEST:KEYBoard[:STATe] OFF
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Note:
The test can not output internally
generated pass/fail information.
The user must decide whether a
malfunction has occurred.
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3.2.4 USB Cable Test
USB cables of good quality are required for EMI suppression and stable connections.
However, according to our experience USB cables are of varying and often poor
quality. This concerns the connection between the cable shield and the shield contacts
of the connectors.
Cables of poor quality may cause EMI interference and poor connection quality. EMI
interference, among other things, may ultimately lead to measurement errors. Poor
connection quality may create problems like increased latencies that are due to
retransmissions because of data corruption or may even lead to a complete loss of
data connection.
Therefore, we recommend checking every USB cable using the following easy method:
Measure the electrical resistance from the shield contact of one connector to the shield
contact of the other connector. For correct measurement results, consider the contact
resistance at your probe tips. Good cables have a value of less than 0.6 Ω according to
USB standards.
Also check, whether the resistance is stable when you bend the cable.
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3.2.5 Troubleshooting with Internal Selftest
The internal self test checks the instrument by setting different internal states and
measuring internal diagnostic points.
Execute Diagnostic/Test - Selftest- Selftest. The self test reports the modules failing
the test:
To see the details of the self test open the corresponding branch of the result tree:
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3.2.6 Troubleshooting with Internal Adjustments
Various internal adjustments are necessary for correct operation of the instrument. The
failure of a certain adjustment can shorten troubleshooting considerably. The affected
module is the RF Mainboard and the installed R&S SMB-B112 Doubler Board.
Note:
Failed internal adjustments can also be queried on the info page -> History.
Normal action
Internal adjustments call:
Setup - Internal Adjustments - Adjust
All
Internal adjustment of the RF Mainboard
and the optional R&S SMB-B112/-B112V
Doubler Board is executed.
Error, possible causes and corrective
action
Abort during adjustment:
The synthesis, level and vector
modulator adjustments in the standard
frequency range up to 6 GHz are
carried out exclusively on the RF
Mainboard using the Diagnostic A/D
converter on the Module. Adjustments
concerning the extended frequency
range from 6 GHz to 12.75 GHz use
diagnostic system of the Doubler Board
option and the Diagnostic A/D converter
on the RF Mainboard.
If the synthesis or vector modulation
adjustment fails most probably the RF
Mainboard is defective. Check the RF
Mainboard being supplied correct (see
page 76).
If the level adjustment fails in an
instrument without Doubler Board most
probably the RF Mainboard is defective.
Check the RF Mainboard being
supplied correct (see page 76).
If the level adjustment fails in an
instrument with Doubler Board most
probably the RF Mainboard is or the
Doubler Board is defective. Check the
connection of ribbon cable W211.
Perform the instrument self test (see
page 51).
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3.2.7 Instrument Faults
The following table lists R&S SGS100A faults. For every fault additional test are
described to determine the defective module.
Fault
Test
Action if test fails
RF Output
Level is wrong
R&S SGS100A settings:
 Instrument Preset
 Reference Oscillator  Source
Int
 RF on
 Mod off
 Level = 15 dBm
Measure the Output Level with a
power meter across the frequency
range. The difference between set
and measured level has to be lower
than guaranteed in the datasheet.
Instrument without step
attenuator:
Check the mating torque of
the SMA-connector at cable
W100 being 60 Ncm.
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
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Instrument with step
attenuator option:
Check the connection of
ribbon cable W206. Check
the mating torque of the
SMA-connectors at cables
W100A and W110A being
60 Ncm.
Most probably the RF
Mainboard or the Step
Attenuator is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
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R&S SGS100A
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Fault
Test
Action if test fails
RF Output
Frequency is
wrong
R&S SGS100A settings:
 Instrument Preset
 Setup  Internal Adjustment 
‘Adjust all’
 Reference Oscillator  Source
Ext
 Reference Oscillator  Ext Ref
Input Frequency 10 MHz
 RF on
 Mod off
 Level: 0 dBm
 Frequency = 1 GHz
Supply an external 10 MHz
reference signal meeting the level
and frequency specification given in
the datasheet. Measure output
frequency with a spectrum analyzer
or a frequency counter synchronized
to the same reference. The
frequency error has to be < 0.1 Hz.
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
R&S SGS100A setting:
 Reference Oscillator  Source
Int
 Reference Oscillator  Output
Frequency 10 MHz
 Reference Oscillator  REF/LO
Output REF
Measure the 10 MHz reference
output signal with spectrum analyzer
or frequency counter and power
meter. Output frequency and level
have to meet the specifications
given in the data sheet.
Without Reference Oscillator
B1 being equipped most
probably the RF Mainboard is
defective. Check the RF
Mainboard being supplied
correct (see page 76).
If the R&S SGS100A is
equipped with Reference
Oscillator R&S SGS-B1
remove the unit (see
page 104) and perform this
test again. If it works most
probably the Reference
Oscillator B1 is defective.
Check the Reference
Oscillator being supplied
correct (see page 81).
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Fault
Test
Action if test fails
Poor
Harmonic
Distortion
R&S SGS100A settings:
 Instrument Preset
 Reference Oscillator  Source
Int
 RF on
 Mod off
 Level  Mode Normal
 Level  Setting Characteristic 
Auto
 Level = Maximum guaranteed
level for harmonic distortion (see
datasheet)
Measure the level of the fundamental
frequency with a spectrum analyzer.
The level of every harmonic has to
be at least 30 dB lower than the level
at the fundamental frequency.
Repeat this test over the frequency
range of the instrument.
Instrument without step
attenuator:
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
Fault
Test
Action if test fails
Slow Settling
times
Settling times are defined for PCI
express remote control only. The
settling time is the time-delay after
the remote control command arrives
at the R&S SGS100A until level and
frequency are within the given
tolerance from their final values.
Be careful not to measure with an
instrument drifting on its own due to
applying the RF from the
R&S SGS100A.
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
Service Manual 1173.9111.02 -06
Instrument equipped with
Step Attenuator:
Most probably the RF
Mainboard or the Step
Attenuator is defective.
Check the connection of
ribbon cable W206. Check
the RF Mainboard being
supplied correct (see
page 76).
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Fault
Test
Action if test fails
10 MHz / 100
MHz / 1000
MHz
Reference
Input faulty
Check the 10 MHz / 100 MHz /
1000 MHz reference signal fed into
the R&S SGS100A with a spectrum
analyzer or frequency counter and
power meter. If level and frequency
of this signal is matching the
specification in the datasheet set the
R&S SGS100A to:
 Instrument Preset
 Reference Oscillator  Source
Ext
 Reference Oscillator  Ext Ref
Input Frequency 10 MHz /
100 MHz / 1000 MHz
 RF on
 Mod off
 Frequency = 1 GHz
 Level = 0 dBm
Check for error Messages. No
“External Reference Errors” are
allowed to occur.
Measure output frequency with a
spectrum analyzer or a frequency
counter synchronized to the same
reference. The frequency error has
to be < 0.1 Hz.
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
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Fault
Test
Action if test fails
10 MHz / 1000
MHz
Reference
Output faulty
R&S SGS100A setting:
 Instrument Preset
 Reference Oscillator  Source
Int
 Reference Oscillator  Output
Frequency 10 MHz / 1000 MHz
Measure 10 MHz / 1000 MHz
reference output signal with
spectrum analyzer or frequency
counter and power meter. Output
frequency and level have to meet
the specifications given in the data
sheet.
R&S SGS100A without
Reference Oscillator
R&S SGS-B1:
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
R&S SGS100A with
Reference Oscillator
R&S SGS-B1:
Remove the Reference
Oscillator B1 (see page 104)
and perform this test again. If
still failing most probably the
RF Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
If the 10 MHz / 1000 MHz
reference signal is in
tolerance most probably the
Reference Oscillator B1 is
defective. Check this module
being supplied correct (see
page 81).
Fault
Test
I/Q ext Input
Faulty
R&S SGS100A settings:
 Instrument Preset
 Reference Oscillator  Source
Int
 RF on
 Mod on
Measure the input resistance of the
I/Q Input SMA connector with a
multimeter. The input resistance
should be 50 Ω ± 10 %.
Action if test fails
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
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Fault
Test
The vector modulation performance
is specified only up to the Peak
Envelope Power (PEP) noted in the
datasheet. Ensure the internal IQ
adjustment was performed
successfully.
The vector modulation performance
has to match the values given in the
datasheet. Measure with a vector
signal analyzer with sufficient
performance, i.e. an R&S FSQ
spectrum analyzer.
Action if test fails
Fault
Test
Action if test fails
Trigger Input /
Output faulty
This signal is driven from the RF
Mainboard FPGA and the Trigger
Input / Output SMA connector is
directly fitted onto the RF Mainboard
as well.
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
Fault
Test
Action if test fails
Faulty Remote
interface
PCI express,
USB or LAN
All remote interfaces including the
interface connectors are fitted
directly on the Controller Board.
Most probably the Controller
Board is defective. Check
the Controller Board being
supplied correct (see section
"Switch-On Problems" on
page 61).
Fault
Test
Action if test fails
Instrument
switches off,
error message
“Emergency
shutdown”
appears
Check if fan operates during
instrument boot procedure.
Check if fan operation is constrained
by dust etc.
Remove and clean the fan
unit.
If necessary, replace the fan
(see page 103).
Check ambient temperature.
Ensure proper cooling of the
instrument and do not limit
the air flow. Operate the
instrument inside the
ambient temperature
specifications.
Vector
Modulation
faulty
Service Manual 1173.9111.02 -06
Most probably the RF
Mainboard is defective.
Check the RF Mainboard
being supplied correct (see
page 76).
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3.2.7.1
Fuses
Switch on the R&S SGS100A and measure the voltage at fuse F2800.2. If the Voltage
is less than 12 V, change the power supply.
If the voltage is o.k., measure the voltage at fuse F2800.2. If the voltage is much lower
than 11.9 V, then fuse F2800 is blown and most probably the Controller Board
(1416.1201) is faulty. Replace the fuse with the correct type given by the table below
and check the Controller Board (see section "Switch-On Problems" on page 61).
Measure the voltage at fuse F2801.1. If the voltage is much lower than 11.9 V, then
fuse F2801 is blown. The fuse might be blown due to a defective module other than the
RF Mainboard. If the fuse is blown, replace the fuse with the correct type given below.
Remove the connections to the Doubler Board (X211) and the step attenuator
ASATT13 (X206), if present. If the RF Mainboard is equipped with the Reference
Oscillator R&S SGS-B1, remove this unit as well (see section "Removing the OCXO
Board" on page 104). Switch on the R&S SGS100A and after two minutes check the
voltage drop across fuse F2801 again. If the fuse is blown again, the RF Mainboard is
defective and should be replaced.
If the fuse is o.k., switch off the R&S SGS100A again. If the R&S SGS100A is
equipped with step attenuator, then connect the step attenuator ASATT13. Switch on
the R&S SGS100A again. If the fuse is blown after two minutes, the step attenuator
module ASATT13 (1412.5360) is defective and has to be replaced (see page 108).
If the R&S SGS100A is equipped with a Doubler Board, switch off the R&S SGS100A
and connect this module to the RF Mainboard (X211). Switch on the R&S SGS100A
again. If the fuse is blown after two minutes, the Doubler Board 1416.1601 is faulty and
has to be replaced (see page 106).
If the R&S SGS100A is equipped with a Reference Oscillator R&S SGS-B1, then
switch off the R&S SGS100A and insert the reference oscillator.
Switch on the R&S SGS100A again. If the fuse is blown after two minutes the
reference oscillator module (1416.2508) is defective and must be replaced (see
page 104).
After replacement of defective modules don’t forget to replace fuse F2800 and/or
F2801 too!
RFMB revision
(TAZ)
Fuse
Type
R&S Part
Number
up to 6.08
F2800
T5A
1090.4442.00
up to 6.08
F2801
T5A
1090.4442.00
from 6.09
F2800
FF7A
2079.5994.00
from 6.09
F2801
FF7A
2079.5994.00
Service Manual 1173.9111.02 -06
Manufacturer Part Number
Littlefuse R452.005 NRL
(MRL)
Littlefuse R452.005 NRL
(MRL)
Littlefuse R451.007 NRL
(MRL)
Littlefuse R451.007 NRL
(MRL)
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F2800.1 +12V
F2800.2 +12V
F2801.1 +12V
Figure 3-2: Position of the fuses on the RF Mainboard
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3.2.8 Troubleshooting − RF Mainboard
The tests listed below ensure that an assumed error on the RF Mainboard is not
caused by a defective or incorrectly connected cable, incorrect adjustment or another
module.
3.2.8.1
Internal Adjustment “Adjust All”
A comprehensive test of the module is to run the internal adjustment.
Normal action
Internal adjustments call:
Setup – Internal Adjustments…
Adjust Synthesis
Error, possible causes and
corrective action
Abort during adjustment:
-
Internal adjustment of the synthesizer on
the RF Mainboard is executed. As result
“Pass” is displayed.
Internal adjustments call:
Setup – Internal Adjustments…
Adjust Level
Abort during adjustment:
-
Internal adjustment of the ALC Loop on
the RF Mainboard is executed. As result
“Pass” is displayed.
Internal adjustments call:
Setup – Internal Adjustments…
Adjust IQ Modulator
If the adjustment fails even with
disconnected Doubler Board, most
probably the RF Mainboard is faulty.
When the adjustment fails only with
Doubler Board, the Doubler Board may
be defective.
Abort during adjustment:
-
Internal adjustment of the IQ-Modulator
on the RF Mainboard is executed. As
result “Pass” is displayed
Service Manual 1173.9111.02 -06
The adjustments are all carried out
exclusively on the RF Mainboard. Most
probably the RF Mainboard is
defective. Check the board being
supplied correctly (see page 77).
The adjustments are all carried out
exclusively on the RF Mainboard. Most
probably the RF Mainboard is
defective. Check the board being
supplied correctly (see page 77).
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3.2.8.2
Supply Voltages
Switch on the R&S SGS100A and measure the supply voltages of the RF Mainboard at
the coils and capacitors near power supply connector (X270, see Figure 3-3). The
measured voltages have to meet the values given in the table below. The voltage at
V2806.5-8 may be switched off due to over temperature protection. The temperature of
all modules should be less then 70 °C.
If not, turn off the R&S SGS100A and let all modules cool down, before you repeat
these measurements. Be sure the fan is working correctly!
If one or more of the voltages are out of tolerance, the RF Mainboard is faulty.
Measuring Point
Voltage (V)
Shielding enclosure
0 (GND)
V2806.5-8
+ 11.8 to + 12.5
L2810.2
+ 6.4 to + 6.7
L2807.2
+ 8.4 to + 8.6
C2838.2
- 6.6 to - 6.4
C2810.1
+ 24 to + 25
C2906.1
+ 4.2 to + 4.4
L2805.2
+ 11.5 to + 12.5
Reference Oscillator
OCXO
C2838.2 -6.5V
C2906.1 +4.3V
L2810.2 +6.5V
L2807.2 +8.5V
C2810.1 +25V
V2806.5-8 +12V
C2839.1 +12V_DBL
Doubler Module Step Attenuator
Figure 3-3: Power Supply and interface connectors of the RF Mainboard
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3.2.8.3
Input and Output Signals
Connector,
system
Signal name
Setting on
signal generator
Frequency
Level
Signal flow
X205, SMA
RF_OUT
RF on
1 to 12750 MHz
-125 to
+25 dBm
To RF connector
at rear panel or
step attenuator
X201, SMA
REF_IN
Ref External
Ref: 10/100/1000 MHz
LO: 80 to 6500 MHz
0 to 16 dBm
External
Reference or
LO-Input
X202, SMA
REF_OUT
Ref/LO Output on
Ref: 10/100/1000 MHz
LO: 80 to 6500 MHz
6 to 12 dBm
Reference or
LO-Output
X203, SMA
I_IN
IQ-Modulation on
0 to 1000 MHz
-0.5 to +0.5 V
I-Input for Vector
Modulation
X204, SMA
Q_IN
IQ-Modulation on
0 to 1000 MHz
-0.5 to +0.5 V
Q-Input for
Vector
Modulation
X207, SMA
LO_6
RF Frequency >
6500 MHz
3250 to 6375 MHz
4 to 7 dBm
To frequency
doubler on
doubler board
X208, SMA
LO_12
RF Frequency >
6500 MHz
6500 to 12750 MHz
9 to 12 dBm
From frequency
doubler on
doubler board
X209, SMA
AMP12_IN
RF Frequency >
6000 MHz
6000 to 12750 MHz
-5 to -12 dBm
To RF amplifier
on doubler
board
X210, SMA
AMP12_OUT
RF Frequency >
6000 MHz
6000 to 12750 MHz
-125 to
+25 dBm
From RF
amplifier on
doubler board
X104, SMA
TRIG
---
---
LVC logic
Bidirectional
trigger
input/output
See also Figure 3-4: Connectors.
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Figure 3-4: Connectors
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3.2.8.4
Error Messages Concerning the RF Mainboard
Error message
“ALC unlocked”
Error correction



"Synthesis main-loop PLL unlocked"
“Reference PLL unlocked”

Execute Internal Adjustment "Adjust
Synthesis".

If the error message does not disappear
change the module.

In case that the reference source is set to
“external”, check if the external reference is
connected to the REF/LO Input. Are the
level and the frequency error of the external
reference signal as specified in the data
sheet?
If the reference source is set to “internal”
troubleshoot the RF Mainboard with the
internal diagnosis and check the OCXO
R&S SGS-B1 (see section "Troubleshooting
− Reference Oscillator option R&S SGS-B1"
on page 81).

"Synthesis adjustment failed"
"Synthesis adjustment data invalid"
3.2.8.5
Execute Internal Adjustment "Adjust Level".
Check if the output level is higher than the
specified maximum output level. Reduce
the output level.
Set attenuator mode “Auto”.

Execute Internal Adjustment "Adjust
Synthesis".
If error message does not disappear, check the
diagnosis (see section "Troubleshooting with
Internal Selftest" on page 65).

Execute Internal Adjustment "Adjust
Synthesis".

If the error message does not disappear,
check the diagnosis (see section " on
page 65).
Warnings Concerning the RF Mainboard
Warnings
"Pep value exceeds defined limit"
Warning correction


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The peak envelope power (PEP) is higher
than the set upper limit.
Reduce the output level.
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3.2.8.6
Frequency Error
Error
Error correction
Internal reference frequency:
Frequency error greater than limit
given in datasheet

Check if the error message “Reference PLL
Unlocked” appears (see page 78).

The frequency accuracy of the synthesizer is
determined (set to internal reference) by a highly
stable 10 MHz quartz oscillator that is set to a
calibrated frequency standard at the R&S factory.
This oscillator is subject to ageing and hence its
output frequency can be adjusted (see chapter 2,
"Adjustment of internal Reference Frequency").
Note: The internal reference can be impaired under the
menu - Reference Oscillator… - Adjustment.
This setting does not affect the factory
adjustment and can be reset at any time by
means of deactivation. If the tuning range is
insufficient to reach the frequency error given in
the datasheet the TCXO or OCXO on the RF
Mainboard is defective. Replace the RF
Mainboard if the R&S SGS comes without option
R&S SGS-B1 otherwise see section "Replacing
the OCXO Board R&S SGS-B1" on page 104.
3.2.9 Troubleshooting − Reference Oscillator option R&S SGS-B1
3.2.9.1
Input and Output Signals
The Reference Oscillator has only one connector (X1) and is directly plugged into the
RF Board (X250, see Figure 3-5). All signals and the supply voltage are fed to the
module through this connector. Turn off the instrument and pull out the OCXO board.
Turn on the instrument and check the following voltages:
Measuring Point
Voltage (V)
Shielding enclosure
0 (GND)
X250.B1
+ 3.3 to 3.4
X250.A1
+ 10.75 to + 11.25
If one or more of the voltages are out of tolerance, the RF Mainboard is faulty.
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X250.B1 3.3 ... 3.4V
X250.A1 10.75 ... 11.25V
Figure 3-5: Pin locations X250 on RF Mainboard
Turn off the R&S SGS100A, plug in the OCXO board and power up the
R&S SGS100A. Set reference source to “internal”.
The enable signal at G1.6 must have high-level (5.6 V to 5.8 V).
In the list under setup – hardware config should be the entry “OCXO”.
At pin G1.1 the output signal of the reference oscillator can be measured (10 MHz,
1 Vpp). If you notice a different behaviour, try a new tested OCXO board. If this still
does not work, troubleshoot the RF Mainboard.
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G1.6 Enable
G1.1 10MHz 1Vpp
Figure 3-6: Pin locations on OCXO
3.2.9.2
Error Messages Concerning the Reference Oscillator Module
Error message
" Reference oscillator oven cold”
Error correction

Check the supply voltages of the module (see
section "Input and Output Signals").

If the supply voltages are o.k. and this message
does not disappear after 10 minutes, OCXO is
defective. Change the module.
"Reference PLL unlocked"

Switch the R&S SGS100A to external Reference
and supply a 10 MHz 10 dBm signal to the Ref/LO
Input of the RF Mainboard. If the error message
disappears and the R&S SGS100A is working
correctly, the OCXO is defective, change the
module.
"OCXO: cannot read EEPROM data"
"OCXO: cannot store adjustm. data"

This indicates problems concerning the data
transfer from and to the EEPROM of the module.
If changing the module does not help, change the
RF Mainboard.
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3.2.9.3
Frequency Error, Reference Oscillator Adjustment
Error
Error correction
Internal reference frequency:
Frequency error greater than limit
given in datasheet

Check if the error message “Reference PLL
Unlocked” appears (see page 78).

The frequency accuracy of the synthesizer is
determined (set to internal reference) by a highly
stable oven controlled 10 MHz quartz oscillator
that is set to a calibrated frequency standard at
the R&S factory. This oscillator is subject to
ageing and hence its output frequency can be
adjusted (see chapter 2, “Adjustment of internal
Reference Frequency”).
Note:
The internal reference can be tuned by up to
-7
approx. 10 under the menu Reference
Oscillator… - Adjustment. This setting does
not affect the factory adjustment and can be
reset at any time by means of deactivation. If
the tuning range is insufficient to reach the
frequency error given in the datasheet the
OCXO is defective.
3.2.10 Troubleshooting − Active Step Attenuator
3.2.10.1
Supply Voltages
Remove the RF cables W100A, W110A from the Step Attenuator. Remove the Step
Attenuator from the instrument and connect the module to the RF Mainboard using
cable W206. Switch on the R&S SGS100A and measure the supply voltages of the
Step Attenuator at the capacitors near its power supply connector (X700, see
Figure 3-7).
Danger of hot surfaces
Do not run the Step Attenuator longer than 5 minutes without cooling.
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The measured voltages have to meet the values given in the table below. If one or
more voltages are not of the required level, check the Controller Board (see section
"Switch-On Problems" on page 61).
Measuring Point
R&S SGS100A switched On
Shielding enclosure
GND
C600
+7.3 V to +8.5 V
C605
+11.5 V to +12.8 V
Z701
-8 V to -5.5 V
Figure 3-7: Power Supply Connector of Active Step Attenuator (top view)
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Figure 3-8: Power Supply Connector of Active Step Attenuator (bottom view)
If the supply voltages do not comply with the given values in the above table, change
the connector cable and test again. If the supply voltages still do not comply, change
the module.
3.2.11 Troubleshooting − Doubler Board option R&S SGS-B112/-B112V
3.2.11.1
Supply Voltages
Check the internal supply voltages of the Doubler Board with the internal diagnosis
described in section "Troubleshooting with Internal Selftest" (diagnosis test points:
D_P11V, D_P7V5, D_P6V, D_P5V, D_P3V3, D_N6V). If one or more tests fail remove
the case (see page 89) and the EMC panel (see page 91), and check the supply
voltages at the test points (at X405) according to Figure 3-9.
The measured voltages have to meet the values given in the table below. If all voltages
are of the required level, change the module.
If the supply voltages do not comply with the given values in the above table, change
the connector cable W211 and test again. If the supply voltages still do not comply,
check the voltages of the RF Mainboard (see section "Supply Voltages").
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Test point
Voltage range
Shielding enclosure
GND
TP1
+7.5 V to +8.5 V
TP2
-7 V to -5.5 V
TP3
+6 V to +7 V
TP4
+11.5 V to +12.5 V
Figure 3-9: Location of the test points to measure the supply voltages
3.2.11.2
Input and Output Signals
Run the internal self test (see page 65) in order to check the internal RF-signals of the
Doubler Board (diagnosis test points: D_DBL_IN, D_DBL_ALC, D_DBL_OUT,
D_AMP_IN, D_AMP_OUT). If one of the tests at D_DBL_IN or D_AMP_IN fails, there
is no input signal and probably the RF Mainboard or one of the RF-cables W207,
W208, W209 and W210 is defective. If both of these tests pass and at least one of the
other tests fail probably the Doubler Board is defective. In this case change the
module.
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3.3 Module Replacement and Upgrade
This section describes in detail the replacement of modules. Chapter 5 "Documents"
provides information on how to order spare parts. It contains the list of mechanical
parts with order numbers and the illustrations for module replacement.
Danger of injury during module replacement
Any adjustments, replacement of parts, maintenance or repair must be carried out
exclusively by technical personnel authorized by Rohde & Schwarz.
Follow the step-by-step instructions for module replacement carefully to avoid injury
and ensure safe operation.
Risk of electrostatic discharge
Protect the work area against electrostatic discharge to avoid damage to electronic
components in the modules. For details, refer to the safety instructions at the beginning
of this manual.
Protection of mechanical components
Always use a torque wrench (60 Ncm) to fasten all RF connectors. Do not use an
open-end wrench.
Protection of electronic components
Always wear gloves when handling the electronic components.
Datasheet compliance
Recalibration of the instrument is required after any disconnection or connection of
RF cables.
3.3.1 Required Tools
●
●
●
●
Star screwdriver TX 8
Star screwdriver TX 20
Hex Nut-Driver 5 mm
Torque wrench 60 Ncm (8 mm)
3.3.2 Module Overview
Overview - Module Replacement
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Module
Designation
Instrument
Part No.
Replacement Part
Order No.
Page Ref.
Power Supply
(AC 90 V to 264 V)
A50
1416.0870.00
1416.0870.00
92
Controller Board
A100
1416.1201.02
1416.1201.02
Error!
Bookmark not
defined.
RF Mainboard CW
incl. in R&S SGS-B106
A200
1416.1001.03
1416.1001.03
95
RF Mainboard IQ
incl. in R&S SGS-B106V
A200
1416.1001.02
1416.1001.02
95
Doubler Board CW,
incl. in R&S SGS-B112
A400
1416.1601.02
1416.1601.02
106
Doubler Board IQ,
incl. in R&S SGS-B112V
A400
1416.1601.03
1416.1601.03
106
Flex. Switch Board
A300
1416.0640.00
1416.0640.00
101
Step Attenuator
incl. in R&S SGS-B26
A500
1412.5360.02
1412.5360.02
110
OCXO Board
incl. in R&S SGS-B1
A600
1416.2508.02
1416.2508.02
104
Fan Unit
E1
3584.3900.00
3584.3900.00
103
Notes:
All modules can be replaced by modules with the same part number or by
replacement modules as listed above. The words "left" and "right" in the
manual always refer to the front view of the instrument.
3.3.3 After Replacing an Assembly
After you have replaced one of the assemblies, certain adjustments, functional checks
or performance tests have to be carried out. Please refer to chapter 2 "Adjustment".
3.3.4 Removing the Case
Unfasten the two rear feet (480) on both sides and take them off.
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480
To remove the two covers – lower (350) and upper (380) – first push the cover
backwards and then remove it.
380
350
3.3.5 Installing the Case
1. To install the covers – lower (350) and upper (380) – first put the cover holders into
the slots on the unit and then push it down.
380
350
Risk of damage to the instrument.
Ensure that the Power Supply cord is disconnected.
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2. Put the two rear feet (480) on the instrument and fasten it.
480
3.3.6 Replacing the EMC Panel
3.3.6.1
Removing the EMC Panel
1. Removing the case (see page 89).
2. Unfasten the six screws (290), lift up the EMC panel (280) and remove it
backwards.
280
3.3.6.2
Installing the EMC Panel
1. Push the EMC panel (280) forward and push it down. Fasten it with the six screws
(290).
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280
2. Installing the case (see page 90).
3.3.7 Replacing the Power Supply (A50)
3.3.7.1
Removing the Power Supply
1. Switch off the instrument.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Disconnect the side panel (450) by pushing it backwards and removing it from the
unit.
450
5. Unfasten the two combination screws (60) on the rear of the instrument.
60
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6. Unfasten the combination screws (60) on the right and on the left of the Power
Supply.
60
60
7. Disconnect the Power Supply cable from X270 on the RF Mainboard (1010/1020).
8. Lift up and remove the Power Supply (50).
50
Power Supply Cable
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3.3.7.2
Installing the Power Supply (A50)
1. Place the Power Supply (50) into the unit.
2. Connect the Power Supply cable on X270 on the RF Mainboard (1010/1020).
50
Power Supply Cable
3. Fasten the two combination screws (60) on the right and on the left of the Power
Supply.
60
60
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4. Connect the side panel (450) by putting the holders of the side panel into the slots
on the unit and then push it forward.
450
5. Fasten the two combination screws (60) on the rear of the instrument.
60
6. Install the EMC panel (see page 91).
7. Install the case (see page 90).
8. Perform the necessary action described in chapter Adjustment (page 47).
3.3.8 Replacing the RF Mainboard (A200) or Controller Board (A100)
RF Mainboard and Controller Board can only be replaced together.
3.3.8.1
Removing the RF Mainboard or Controller Board
1. Remove the case (see page 89).
2. Remove the EMC panel (see page 91).
3. If a Doubler Board is installed on the RF Mainboard, remove the Front Unit (see
page 100).
4. Unfasten the three combination screws (230 and 1050) on the rear of the
instrument.
5. Unfasten the two locking screws from the Controller Board (210) on the rear of the
instrument.
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locking screws SW5
1050
230
6. Unfasten the one combination screw (1060).
7. Unfasten the one combination screw (1140) and remove it together with the
distance sleeve (1120).
8. Unfasten the three combination screws (1040).
9. Disconnect the fan cable from X240 and the Power Supply cable from X270.
10. Disconnect the flex switch board cable (150) from X106 on the Controller Board
(210) carefully.
210
power supply cable
fan cable
1010 or 1020
1120 and 1140
1060
screw is
under the
front
1040
11. Lift up the RF Mainboard (1010/1020) and pull it in toward the front to remove it
completely with the Controller Board (210).
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1010 or 1020
210
12. Unfasten the three combination screws (260) and remove the Controller Board
(210).
13. Unfasten the two combination screws (1080) and disconnect the cable W100
(1100) incl. mounting bracket (1070).
This step only when RF Mainboard removed.
3.3.8.2
Installing the RF Mainboard (A200) or Controller Board (A100)
1.
Fasten the cable W100 (1100) incl. the mounting bracket (1070) with the two
combination screws (1080) on the RF Mainboard (1010/1020).
This step only when RF Mainboard removed.
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2. Place the Controller Board (210) on the RF Mainboard and fasten it with the three
combination screws (260).
3. Place the RF Mainboard (1010/1020), with the Controller Board (210) pointing
forward, into the unit and insert it carefully. If a Doubler Board is installed on the RF
Mainboard, remove the Front Unit first. (see page 100)
1010 or 1020
210
4. Connect the fan cable on X240 and the Power Supply cable on X270.
5. Connect the flex switch board cable (150) at X106 on the Controller Board (210)
carefully.
6. Fasten the three combination screws (1040).
7. Fasten the combination screw (1140) together with the distance sleeve (1120).
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8. Fasten the one combination screw (1060).
210
power supply cable
fan cable
1010 or 1020
1120 and 1140
1060
screw is
under the
front
1040
9. Fasten the three combination screws (230 and 1050) on the rear of the instrument.
10. Fasten the two locking screws on the Controller Board (210) on the rear of the
instrument.
210
locking screws SW5
1050
230
11. Install the EMC panel (see page 91).
12. Install the case (see page 90).
13. Perform the necessary action described in chapter Adjustment (page 47).
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3.3.8.3
Replacing the SIM Card
If you replace the controller, you have to remove the SIM card.
The SIM card is part of your instrument and will not be replaced by Rohde & Schwarz if
it becomes lost. Always keep the SIM card with you.
1. Remove the Controller Board (see page 95).
The SIM card (220) is located on the bottom of the Controller Board (210).
2. Open the latch of the SIM card holder by sliding the retaining bracket toward
OPEN.
3. Flip up the SIM card holder and remove the SIM card (220).
4. To install the SIM card, proceed in the reverse order.
3.3.9 Replacing the Front Unit
3.3.9.1
Removing the Front Unit
1. Switch off the instrument.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Unfasten the four screws (180) and remove the two front grips (170).
5. Disconnect the flex switch board cable (150) from the Controller Board (210)
carefully.
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210
150
180
170
6. Pull the entire Front Unit forward.
7. Put the flex switch board cable (150) carefully through the slot.
8. For replacing the Front Unit proceed in the reverse order.
3.3.10 Replacing the Flex Switch Board A300
3.3.10.1
Removing the Flex Switch Board and Push-Button Board
1. Switch off the instrument.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Remove the Front Unit (see page100)
5. Carefully push the five holders apart and remove the flex switch board A300 (150).
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holders
150
150
140
6. Remove the push-button board (140).
150
3.3.10.2
140
Installing the Flex Switch Board and the Push-Button Board
1. Install the push-button board (140).
150
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2. Install the flex switch board A300 (150) and click it carefully into the five holders.
holders
150
3. Install the Front Unit.
4. Install the EMC panel.
5. Install the case.
3.3.11 Replacing the Fan E1
Note: Always make sure the instrument fan operation is not constrained by dust etc.
The fan can be inspected through the air intake at the case bottom side.
1. Switch off the instrument and disconnect the main plug.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Remove the Front Unit (see page 100)
5. Disconnect the fan cable from X240 on the RF Mainboard (1010 or 1020).
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Fan cable
6. Lift out the fan with the two rubber clips.
rubber clips
7. For installing the new fan proceed in the reverse order.
3.3.12 Replacing the OCXO Board R&S SGS-B1
3.3.12.1
Removing the OCXO Board
1. Switch off the instrument and disconnect the main plug.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Unfasten the two combination screws (1830) and carefully remove the OCXO
board (1810) from the RF Mainboard (1010/1020).
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1830
1810
3.3.12.2
Installing the OCXO Board
1. Switch off the instrument and disconnect the main plug.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Carefully place the OCXO Board (1810) on the RF Mainboard (1010/1020) and
fasten it with two combinations screws (1830).
1830
1810
5. Install the EMC panel (see page 91).
6. Install the case (see page 90).
7. Perform the necessary action described in chapter Adjustment (page 47).
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3.3.13 Replacing the Doubler Board - R&S SGS-B112/-B112V (A400)
3.3.13.1
Removing the Doubler Board
1. Switch off the instrument and disconnect the main plug
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Remove the Front Unit (see page 100).
5. Remove the RF Mainboard (see page 97).
6. Disconnect the ribbon cable W206 (1650) at X405 on Doubler Board and at X211
on the RF Mainboard.
7. Disconnect the four RF cables connecting the RF Mainboard (1010) with the
doubler board (1310/1320). First W210 (1400), then W209 (1400), then W207
(1380) and W208 (1390).
1330
1310 or 1320
1010 or 1020
W209
W210
1650
W207
W208
1380
1390
1400
8. Unfasten the three screws (1330) and remove the Doubler Board from the RF
Mainboard.
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3.3.13.2
Installing the Doubler Board
The Doubler Board is the R&S SGS-B112 option (1310)
and can be installed in units with the RF Mainboard (1010).
The Doubler Board is the R&S SGS-B112V option (1320)
and can be installed in units with the RF Mainboard (1020) with revision number
greater or equal to 6.09.
Note: Instruments with serial numbers lower than 101600 can’t be upgraded with
the R&S SGS-B112V option due to the installed RF Mainboard version.
Risk of shock hazard and instrument damage
When replacing the electronic step attenuator and/or the Doubler Board be aware of
connecting the ribbon cables (W206/W221) with the right connector of the RF
Mainboard.
1. Switch off the instrument and disconnect the main plug.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Remove the RF Mainboard (see page 95).
5. Connect the RF cables on the RF Mainboard (1010). First W207 (1380) on the left
side, then W208 (1390), then W209 (1400) and W210 (1400) on the right side.
6. Place the Doubler Board (1310) on the RF Mainboard and connect the four RF
cables. First W207 (1380) on the left side, then W208 (1390), then W209 (1400)
and W210 (1400) on the right side.
7. Fasten the Doubler Board on the RF Mainboard with the three screws (1330).
8. Connect the ribbon cable W211 (1650) at X405 on Doubler Board (1310/1320) and
at X211 on RF Mainboard (1010).
Service Manual 1173.9111.02 -06
107
R&S SGS100A
Repair
Module Replacement and Upgrade
1330
1310 or 1320
1010 or 1020
W209
W210
1650
W207
W208
1380
1390
1400
9. Install the RF Mainboard (see page 97).
10. Install the EMC panel (see page 91).
11. Install the case (see page 90).
12. Perform the necessary action described in chapter Adjustment (page 47).
3.3.14 Replacing the Electronic Step Attenuator R&S SGS-B26 (A500)
3.3.14.1
Removing the Electronic Step Attenuator
1. Switch off the instrument and disconnect the main plug.
2. Remove the case (see page 85).
3. Remove the EMC panel (see page 87).
4. Remove the RF Mainboard (see page 95).
5. Disconnect the RF cable W110A (1680) from X220 on the Step Attenuator, the RF
cable W100A (1690) from X221 and the ribbon cable W206 (1650) from X700.
6. Unfasten the four screws (1630) and remove the Attenuator Board (1610).
Service Manual 1173.9111.02 -06
108
R&S SGS100A
Repair
Module Replacement and Upgrade
1610
1650
1690
1630
1680
Service Manual 1173.9111.02 -06
109
R&S SGS100A
Repair
Module Replacement and Upgrade
3.3.14.2
Installing the Electronic Step Attenuator
Risk of shock hazard and instrument damage
When replacing the electronic step attenuator and/or the Doubler Board be aware of
connecting the ribbon cables (W206/W221) with the right connector of the RF
Mainboard.
1. Switch off the instrument and disconnect the main plug.
2. Remove the case (see page 89).
3. Remove the EMC panel (see page 91).
4. Remove the RF Mainboard (see page 95).
5. Unfasten the combination screw (1140) and the distance sleeve (1120).
6. Connect the RF cable W110A (1680) on the RF Mainboard (1020/1010).
7. Install the new RF cable W100A (1690) on the rear of the instrument, put the lock
washer on and fasten the nut.
1140 and 1120
1680
1690
8. Connect the ribbon cable W206 (1650) on X206 of the RF Mainboard (1010/1020).
9. Place the Step Attenuator (1610) on the RF Mainboard (1010/1020) and connect it
with the four screws (1630).
10. Connect the RF cable W110A (1680) on X501 on the Step Attenuator, the new RF
cable W100A (1690) on X502 and the ribbon cable W206 (1650) on X503.
11. Fasten the four screws (1630) and remove the Attenuator Board (1610).
Service Manual 1173.9111.02 -06
110
R&S SGS100A
Repair
Module Replacement and Upgrade
1610
1650
1690
1630
1680
12. Install the RF Mainboard
13. Install the EMC panel (see page 91).
14. Install the case (see page 90).
15. Perform the necessary action described in chapter Adjustment (page 47).
Service Manual 1173.9111.02 -06
111
R&S SGS100A
Firmware Update
Module Replacement and Upgrade
4 Firmware Update
1. Select "SGMA-GUI main panel > Instrument Name > Setup > Maintenance >
Operation
> Install firmware package".
2. Press "Select Package" and navigate to the directory the new firmware is stored in.
3. Enter the "Security Password".
4. Confirm the update with "Accept".
The software transfers the firmware file and automatically starts the update
procedure. During the update, the message "Updating Firmware" is displayed in
the Info line.
Note: The update procedure requires restart of the instrument. The restart is
performed automatically. The instrument is not accessible during that time.
5. Wait until the message "Updating Firmware" disappears and the update is
completed. The green POWER ON/STANDBY LED is on.
Tip: Calibration Error. If the Info line shows the message "Calibration Error", select
"SGMA-GUI main panel > Instrument Name > Setup > Internal Adjustments >
Adjust All" to trigger internal adjustment.
6. If required, install the new R&S SGMA-GUI.
For detailed description, refer to the Getting Started guide, section "Installing the
R&S SGMA-GUI Software on the External PC".
Service Manual 1173.9111.02 -06
112
R&S SGS100A
Factory Recover and USB Install
Module Replacement and Upgrade
5 Factory Recover and USB Install
Hold down front panel buttons ID and LAN simultaneously while switching on the
instrument to start factory recover or USB install.
On factory recover the instrument installs the firmware the instrument was originally
shipped with. This firmware resides in a special partition in the instrument’s persistent
memory. It can be erased using function “Erase factory recover partition” on dialog
Maintenance (protection level 3 required).
Besides installing the original firmware factory recover also clears the internal memory
restoring the instrument to its original state (Instrument Sanitize function).
If a USB stick with a firmware package (*.rsu file) is found the firmware package on the
USB stick is used instead of the contents of the recovery partition.
The progress of the installation procedure is signaled by a running light on the front
panel. When it is finished the lights stop and the LEDs now indicate the status.
All LEDs green: success. All LEDs red except one LED orange: failure.
The position of the one orange LED indicates the reason for the failure.
1st (leftmost) LED:
2nd LED:
3rd LED:
4th LED:
5th LED:
6th LED:
7th LED:
Cannot access recovery partition or USB stick
No update package or recovery package found.
Update package or recovery package defective.
System partition defective.
Out of flash memory
Update package defective
Flash memory write error
The LEDs stay on for 1 minute after which the instrument performs an automatic
reboot.
Service Manual 1173.9111.02 -06
113
R&S SGS100A
Documents
Spare Parts
6 Documents
6.1 Spare Parts
The stock numbers necessary for ordering replacement parts and modules can be
found in the spare part list further down.
Risk of shock hazard and instrument damage
When replacing a module please note the safety instructions and the repair instructions
given in chapter 3 and at the beginning of this service manual.
When shipping a module be careful to provide for sufficient mechanical and antistatic
protection.
6.1.1 Available Power Cables
Stock No
Earthed-contact connector
Preferably used in
DS 0006.7013.00
S1363: 1967' 10 A, 250 V
complying with IEC 83:
1975 standard B2
Great Britain
DS 0006.7020.00
Type 12, 10 A, 250 V
complying with
SEV-regulation 1011.1059,
standard sheet S 24 507
Switzerland
DS 0006.7036.00
Type 498/13, 10 A, 250 V
complying with US-regulation
UL 498, or with IEC 83
USA/Canada
DS 0041.4752.00
GB2099, GB1002, 10 A, 250 V
approvals CCC
China
DS 0041.6232.00
JIS C 8303, 7A, 125 V AC
approvals PSE (JET)
Japan
DS 0006.7107.00
Type SAA3, 10 A, 250 V,
complying with AS C112-1964 Ap.
Australia
DS 0025.2365.00
DS 0099.1456.00
DIN 49 441, 10 A, 250 V, angular
DIN 49 441, 10 A, 250 V, straight
approvals VDE, ÖVE, CEBEC,
KEMA, S, D, N, FI, LCIE, IMQ,
UCIEEEurope
Europe (except Switzerland)
Service Manual 1173.9111.02 -06
114
R&S SGS100A
Documents
Spare Part List and Mechanical Drawings
6.2 Spare Part List and Mechanical Drawings
Service Manual 1173.9111.02 -06
115
Pos.-Nr.
ItemNo
Menge
Quantity
ME
Unit
El.Kennz
Ref.Des.
Benennung / Bezeichnung
Designation
Z
Sachnummer
Stock No.
Ersatzteil
Subst.part
BA
VH
B
B
M
O
B
O
ACHTUNG EGB/ATTENTION ESD
*VARIANTENERKLAERUNG
*EXPLANATION OF MODELS
VAR02=GRUNDVARIANTE
MOD02=BASIC MODEL
314 1
S
OS GERAETESCHILD SGMA 12.75 GHZ IQ
LABEL
1320 1
S
1330 3
S
1380 1
S
W207
DW HF-KABEL W207
RF CABLE W207
Z
1416.1724.00
X
M
P
1390 1
S
W208
DW HF-KABEL W208
RF CABLE W208
Z
1416.1730.00
X
M
O
1400 2
S
W209
DW HF-KABEL W209 + 210
RF CABLE W209 + 210
Z
1416.1747.00
X
M
W
DY FLACHBANDKABEL 26-POLIG R=1,27
RIBBON CABLE 26-POLE
Z
1416.1524.00
X
M
P
A400
EE DOUBLER BOARD
DOUBLER BOARD
1416.1582.00
Z
VS 965/ISR-M2.5X25-A4-PA
965/ISR-M2.5X25-A4-PA
1416.1601.03
X
1416.1547.00
_
Für diese Unterlage behalten wir uns alle Rechte vor.
Ausgedruckte Dokumente unterliegen nicht dem Änderungsdienst.
For this document all rights are reserved.
Printed documents are not subject to revision
W210
1650 1
S
W211
Benennung/Designation
SGS-B112V FREQ EXT TO 12.75GHZ, IQ
SGS-B112V FREQ EXT TO 12.75GHZ, IQ
SGS-B112V
Datum/
Date
2012-04-17
Abt. /
Dept.
1GPK
Name /
Name
Sprach./Lang
Ä.I. / C.I
de en
04.00
Blatt/Sheet
1 of 1
Dokument Nr. / Document No.
HI
1416.1576.01 ST
Block Circuit Diagram
1
3
2
4
6
5
7
8
A
A
SGS100A
Front Panel
A300
FrontmodulBoard
B
B
SGS - B1
A600
OCXO Board
1419.4801.02
1416.2508.02
X1
12 p.
Connector
W211
26 p. Cable
X250
FuseDC/DC Converter,
Filter
Voltage Regulator
X407
LO_6
X208
LO_12
W208
12.75 GHz SMA
X408
LO_12
X209
AMP12_IN
W209
12.75 GHz SMA
X409
AMP12_IN
X210
AMP12_OUT
W210
12.75 GHz SMA
X410
AMP12_OUT
USB
X700
X206
1412.5360.02
X221
ATT_OUT
Q_IN
LAN
100...240V AC/ 50...60Hz/max. 1,7A
incl. Switch
W100
Semi-Rigid, 6 GHz
Rear Panel
E
SMA
SMA
I_IN
W100A
SMA
X201
REF_IN
X202
REF_OUT
X104
TRIG
X203
I_IN
X204
Q_IN
X212
X105
X205
RF_OUT
SMA
W110A
Semi-Rigid,
12.75 GHz
X220
ATT_IN
SMA
E
PCIe
A500
Step Att
SMA
X101
Ethernet
X103
USB OTG
X102
PCI Express
Primary
1416.1001.02/03
80p. Connector
D
SGS - B26
SGS - B106
SGS - B106V
Freescale
MPC8377
1416.0870.00
A200
RF-Mainboard
X20
Sim-Card
1416.1201.02
Secondary
1416.1601.02/03
W206
26 p. Cable
A100
Controller Board
A50
Power Supply
A400
Doubler Board
X207
LO_6
X106
D
C
W207
6 GHz SMA
Fan Unit
3584.3900.00
+12 V DC, 6 A max, 6 p. Cable
SGS - B112
SGS - B112V
X405
Fan Unit
Control
X270
Für diese Unterlage behalten
wir uns alle Rechte vor.
W300
C
X211
X240
E1
TRIG OUT
IN
--REF/LO--
RF 50 Ohm
D
Sprache: / Lang.: Aei: / C.I.:
Benennung:
ISO-Projektion
Methode E
ROHDE&SCHWARZ Designation: SGS100A SGMA RF SOURCE BASE UNIT
Typ:
Type:
1. Z.:
used in:
1
2
3
4
SGS100A
1416.0505.01
Datum:
Date:
05.06.2013
Abteilung:
Dept.:
1GPK
Name:
Name:
Reger
de/en
05.00
Blatt: / Sh.:
1-
Zeichn. Nr.: / Drawing Nr.:
1416.0505.01 FS
1
3
2
4
6
5
7
8
0.08..6.5GHz
MIMO_IN
1GHz
1GHz
X201
REF/LO IN
A
Reference Output
Selector
D_REFOUT
100/10MHz
D_REF1000M
Ref_Out
Reference Input
Selector
TCXO
D_REFPD
D_REFDIFF
10/100/1000MHz
80...6500MHz
D_REFTUNE
DDS-DAC
10MHz
Reference
Loop
A
X202
REF/LO OUT
Ref_Out 10/100MHz
VCO
1GHz
DDS
0.08..6.5GHz
D_PLLDIFF
D_MIMOUT
1...80MHz
D_VCOTUNE
10MHz
SGS-B1
OCXO
0.08..12.75GHz
1GHz
RF_1
D_DDSRF
D_REF250M
X250
Main PLL
3..6.5GHz
VCO
X207
LO_6
X208
LO_12
B
B
X407
LO_6
X408
LO_12
X409
AMP12_IN
AMP12_IN
X209
Doubler 6...12.75GHz
1
Filter bank
2
Leveling
D_FILTIN
Amplifier
D_FILTOUT
C
Doubler
X410
AMP12_OUT
X405
AMP12_OUT
X210
6.00..12.75 GHz
C
Filter bank
Für diese Unterlage behalten
wir uns alle Rechte vor.
0.08..6.00 GHz
1MHz..12.75GHz
Directional Coupler
X205
RF_OUT
Levelling
1...80 MHz
1...80MHz
Power Amps
X220
RF_IN
D_THERM
X221
RF_OUT
RF Output
D_ALC
D_DETREF
RF_1
IQ-Modulator
(0.08 ... 12.75 GHz)
D
I
DAC
ADC
Detector
ADC
I internal
DDS_CAL
X204
Q Input
D
Power supply and control functions
I external
X203
I Input
Step Attenuator
Thermostat
D_DETLVL
Q
IQ-Matrix
Q internal
Q external
14
FPGA
DDS
D_QCAL
D_ICAL
D_P12V
ADC
+12V
Adj. Voltage
X101
LAN
D_P24V
+24V
X102
Cable
PCI express
DDS_CAL
Power Supply
Diagnosis Mux 32 Inputs
D_P8V
D_P3V3
Controller
LVDS Fast Bus,
SPI, GPIOs
E
+8V
E
X270
+12V
D_P6V
5A
+6V
+3.3V
X103
USB OTG
Micro USB
12V (Controller)
D_P2V5
X212
+2.5V
X105
D_N6V
12V (Controller)
D
D_P1V1
5A
-6V
+1.1V
D_P3V9
+3.9V
X104
TRIG
RF Mainboard
Maßstab: / Scale: Toleranz: / Tol:
ISO-Projektion
Methode E
ROHDE&SCHWARZ
Typ:
Type:
1. Z.:
used in:
1
2
3
4
SIGMA
Rauht.: / Rouahn.: Kanten: / Edges:
Benennung:
Designation:
Datum:
Date:
Werkstoff: / Material:
Werknormen: / Company Standards:
Sprache: / Lang.: Aei: / C.I.:
RFMB u GesamtBlock SIGMA 12 GHz
2011-06-17
Abteilung:
Dept.:
1GP4
Name:
Name:
06.00
J. Kuptz
Zeichn. Nr.: / Drawing Nr.:
1416.1001.01 FS
Blatt: / Sh.:
1-
R&S SGS100A
Index
Index
Adjustments
External .......................................................................... 50
Internal ........................................................................... 50
Internal Reference Frequency......................................... 50
Frequency Error ................................................................. 84
Functional Description
Controller Board.............................................................. 53
Doubler Board ................................................................ 57
Power Supply Module ..................................................... 53
Reference Oscillator ....................................................... 59
RF Mainboard ................................................................. 54
Step Attenuator ............................................................... 58
Installing
Doubler Board .............................................................. 107
Electronic Step Attenuator ............................................. 110
EMC Panel ..................................................................... 91
Flex Switch Board ......................................................... 102
Power Supply ................................................................. 94
Push-Button Board ....................................................... 102
RF Mainboard or Controller Board .................................. 97
Instrument Faults ............................................................... 68
Internal Self Test ................................................................ 51
Keyboard and LED Test ..................................................... 64
Measuring Equipment and Accessories ............................. 61
Module Replacement ......................................................... 88
Modules overview ........................................................ 63, 89
Motherboard ...................................................................... 53
Overview of the Modules.................................................... 88
Performance Test ................................................................. 8
Power Cables .................................................................. 114
Power Supply Module ........................................................ 53
Pulse modulation
Test procedure .................................................... 35, 37, 38
Removing
EMC Panel ..................................................................... 91
Flex Switch Board ......................................................... 101
Front Unit...................................................................... 100
OCXO Board ................................................................ 104
Power Supply ................................................................. 92
Push-Button Board ....................................................... 101
Service Manual 1173.9111.02 -06
RF Mainboard or Controller Board .................................. 95
Repair ................................................................................ 52
Replacing
Doubler Board .............................................................. 106
EMC Panel ..................................................................... 91
Fan ............................................................................... 103
Flex Switch Board ......................................................... 101
Front Unit...................................................................... 100
OCXO Board ................................................................ 104
Power Supply ................................................................. 92
RF Mainboard or Controller Board .................................. 95
SIM Card ...................................................................... 100
Spare Parts ...................................................................... 114
Switch-On Problems .............................................. 61, 62, 64
Test Assemblies
I/Q Modulation ................................................................ 11
Output Impedance (VSWR) ............................................ 10
Setting Time ................................................................... 11
Test Equipment .................................................................... 8
Test Frequencies ............................................................... 12
Test Levels......................................................................... 12
Test procedure
Pulse modulation ................................................ 35, 37, 38
Test Procedures
Frequency ...................................................................... 15
I/Q modulation ................................................................ 39
Level Data ...................................................................... 30
PCI Express Interface ..................................................... 46
Phase Coherence Levels ................................................ 46
Reference Frequency ..................................................... 13
Spectral Purity ................................................................ 19
Troubleshooting ................................................................. 60
Active Step Attenuator .................................................... 84
Doubler Board Option ..................................................... 86
Internal Adjustments ....................................................... 67
Internal Selftest ............................................................... 66
Reference Oscillator Option ............................................ 81
RF Mainboard ................................................................. 76
Switch-On Problems ................................................. 62, 64
USB Cable Test ................................................................. 65
116
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