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Rohde & Schwarz RT-ZZ80, User Manual

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Measurement Principles

R&S

®

RT-ZZ80

25

User Manual 1409.7689.02 ─ 02

 

Table 4-2: Typical rise time, bandwidth, input impedance and overshoot with different

connection types

No

Connection

Type

Connection

 

Rise

time

Band-

width

Min. input

impedance

|Z

min

|

Over-

shoot

Signal

socket

Ground

socket

1

signal

pin

ground

pin,

pogo

 

wide

 

spacing

55 

 

ps

7.5

 

GHz

100

 Ω

12

 

%

narrow

spacing

49 

 

ps

9.5

 

GHz

80

 Ω

24

 

%

2

signal

pin, sol-

der in

ground

pin, sol-

der in

short

pins

54

 

ps

8

 

GHz

130

 Ω

11

 

%

long

pins

53 

 

ps

5

 

GHz

165

 Ω

14

 

%

3

signal

adapter,

square

pin

ground

adapter,

square

pin

 

wide

 

spacing

56

 

ps

8,5

 

GHz

100

 Ω

12

 

%

narrow

spacing

49

 

ps

11

 

GHz

45

 Ω

32

 

%

Signal Integrity of the Transferred Signal

Summary of Contents for RT-ZZ80

Page 1: ...R S RT ZZ80 Transmission Line Probe User Manual User Manual 1409 7689 02 02 9Úç2 Test Measurement ...

Page 2: ...29 0 Fax 49 89 41 29 12 164 E mail info rohde schwarz com Internet www rohde schwarz com Subject to change Data without tolerance limits is not binding R S is a registered trademark of Rohde Schwarz GmbH Co KG Trade names are trademarks of the owners The following abbreviations are used in this manual R S RT ZZ80 is abbreviated as R S RT ZZ80 R S RTO is abbreviated as R S RTO ...

Page 3: ...ty 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 t...

Page 4: ...r of electric shock Direct current DC Warning Hot surface Alternating current AC Protective conductor terminal Direct alternating current DC AC Ground Device fully protected by double reinforced insulation 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 ...

Page 5: ...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 Operating states and operating positions The product may be operated only under the operating conditions and in the positions specifie...

Page 6: ...upply 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 n...

Page 7: ...ology equipment e g PCs or other industrial computers comply with the IEC60950 1 EN60950 1 or IEC61010 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...

Page 8: ... damage may occur It is the responsibility of the employer operator to select suitable personnel for operating the products 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 react...

Page 9: ...ent 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 conne...

Page 10: ...tteries 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 Re...

Page 11: ...st 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 ...

Page 12: ...ducto 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 ...

Page 13: ...ambién 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 Símbolo Significado Aviso punto de peligro general Observar la document...

Page 14: ...uerte 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...

Page 15: ...ficies 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 circunsta...

Page 16: ...tores 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 i...

Page 17: ...bida 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 contr...

Page 18: ...s 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 ...

Page 19: ...icas 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 reside...

Page 20: ...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 ...

Page 21: ...ión 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 c...

Page 22: ...se 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 má...

Page 23: ...e zu verwenden Das Produkt ist ausschließlich für den Betrieb in Industrie und Labor bzw wenn ausdrücklich zugelassen auch für den Feldeinsatz bestimmt und darf in keiner Weise so verwendet werden dass einer Person Sache Schaden zugefügt werden kann Die Benutzung des Produkts außerhalb des bestimmungsgemäßen Gebrauchs oder unter Missachtung der Anweisungen des Herstellers liegt in der Verantwortun...

Page 24: ...ammengefasst hierzu zählen u a Geräte Anlagen sowie sämtliches Zubehör Produktspezifische Angaben entnehmen Sie bitte dem Datenblatt sowie der Produktdokumentation Sicherheitskennzeichnung von Produkten Die folgenden Sicherheitskennzeichen werden auf den Produkten verwendet um vor Risiken und Gefahren zu warnen Symbol Bedeutung Symbol Bedeutung Achtung allgemeine Gefahrenstelle Produktdokumentatio...

Page 25: ... nicht vermieden wird Kennzeichnet eine Gefahrensituation die zu leichten oder mittelschweren Verletzungen führen kann wenn sie nicht vermieden wird Kennzeichnet Informationen die als wichtig angesehen werden sich jedoch nicht auf Gefahren beziehen z B Warnung vor möglichen Sachschäden Diese Signalworte entsprechen der im europäischen Wirtschaftsraum üblichen Definition für zivile Anwendungen Nebe...

Page 26: ...oder Strukturen z B Wände und Regale immer den Installationshinweisen des Herstellers Bei Installation abweichend von der Produktdokumentation können Personen verletzt unter Umständen sogar getötet werden 3 Stellen Sie das Produkt nicht auf hitzeerzeugende Gerätschaften z B Radia toren und Heizlüfter Die Umgebungstemperatur darf nicht die in der Produktdokumentation oder im Datenblatt spezifiziert...

Page 27: ... Netzkabel beschädigt ist Überprüfen Sie regelmäßig den einwandfreien Zustand der Netzkabel Stellen Sie durch geeignete Schutzmaßnahmen und Verlegearten sicher dass das Netzkabel nicht beschädigt werden kann und niemand z B durch Stolperfallen oder elektrischen Schlag zu Schaden kommen kann 6 Der Betrieb ist nur an TN TT Versorgungsnetzen gestattet die mit höchstens 16 A abgesichert sind höhere Ab...

Page 28: ... gefährdet 15 Gegenstände die nicht dafür vorgesehen sind dürfen nicht in die Öffnungen des Gehäuses eingebracht werden Dies kann Kurzschlüsse im Produkt und oder elektrische Schläge Feuer oder Verletzungen verursachen 16 Sofern nicht anders spezifiziert sind Produkte nicht gegen das Eindringen von Flüssigkeiten geschützt siehe auch Abschnitt Betriebszustände und Betriebslagen Punkt 1 Daher müssen...

Page 29: ...Niesen Bindehautrötung oder Atembeschwerden auftreten ist umgehend ein Arzt aufzusuchen um die Ursachen zu klären und Gesundheitsschäden bzw belastungen zu vermeiden 4 Vor der mechanischen und oder thermischen Bearbeitung oder Zerlegung des Produkts beachten Sie unbedingt Abschnitt Entsorgung Umweltschutz Punkt 1 5 Bei bestimmten Produkten z B HF Funkanlagen können funktionsbedingt erhöhte elektro...

Page 30: ...etender leitungsgebundener als auch gestrahlten Störgrößen im Wohnbereich Funkstörungen verursachen In diesem Fall kann vom Betreiber verlangt werden angemessene Maßnahmen zur Beseitigung dieser Störungen durchzuführen Gerät der Klasse B Ein Gerät das sich für den Betrieb im Wohnbereich sowie in solchen Bereichen eignet die direkt an ein Niederspannungs Versorgungsnetz angeschlossen sind das Wohng...

Page 31: ... gegenseitig kurzschließen oder durch andere leitende Werkstoffe kurzgeschlossen werden können Eine Zelle oder Batterie darf erst aus ihrer Originalverpackung entnommen werden wenn sie verwendet werden soll 4 Zellen oder Batterien dürfen keinen unzulässig starken mechanischen Stößen ausgesetzt werden 5 Bei Undichtheit einer Zelle darf die Flüssigkeit nicht mit der Haut in Berührung kommen oder in ...

Page 32: ...antwortung des Fahrers das Fahrzeug in sicherer und angemessener Weise zu führen Der Hersteller übernimmt keine Verantwortung für Unfälle oder Kollisionen Verwenden Sie das Produkt niemals in einem sich bewe genden Fahrzeug sofern dies den Fahrzeugführer ablenken könnte Sichern Sie das Produkt im Fahrzeug ausreichend ab um im Falle eines Unfalls Verletzungen oder Schäden anderer Art zu verhindern ...

Page 33: ...orschriften zur Entsorgung sind zu beachten 4 Falls beim Umgang mit dem Produkt Gefahren oder Betriebsstoffe entstehen die speziell zu entsorgen sind z B regelmäßig zu wechselnde Kühlmittel oder Motorenöle sind die Sicherheitshinweise des Herstellers dieser Gefahren oder Betriebsstoffe und die regional gültigen Entsorgungsvorschriften einzuhalten Beachten Sie ggf auch die zugehörigen speziellen Si...

Page 34: ...st exclusivement destiné à l utilisation en industrie et en laboratoire et ou si cela a été expressément autorisé également aux travaux extérieurs il ne peut en aucun cas être utilisé à des fins pouvant causer des dommages aux personnes ou aux biens L exploitation du produit en dehors de son utilisation prévue ou le non respect des consignes du constructeur se font sous la responsabilité de l util...

Page 35: ...ons ainsi que les accessoires est regroupé sous le terme produit Pour les indications spécifiques au produit voir la fiche technique ainsi que la documentation produit Marquages de sécurité des produits Les symboles de sécurité ci après sont utilisés sur les produits pour avertir des risques et dangers Symbole Signification Symbole Signification Avis source générale de danger Se référer à la docum...

Page 36: ...ion et significations Les mots de signalisation suivants sont utilisés dans la documentation produit pour avertir des risques et dangers Indique une situation dangereuse qui si elle n est pas évitée causera des blessures graves ou mortelles Indique une situation dangereuse qui si elle n est pas évitée pourrait causer des blessures graves ou mortelles Indique une situation dangereuse qui si elle n ...

Page 37: ...curité et de prévention d accidents doivent être respectées 1 Sauf stipulations contraires les produits Rohde Schwarz répondent aux exigences ci après faire fonctionner le produit avec le fond du boîtier toujours en bas indice de protection IP 2X utilisation uniquement à l intérieur fonctionnement à une altitude max de 2000 m au dessus du niveau de la mer transport à une altitude max de 4500 m au ...

Page 38: ...ntir le respect des directives de sécurité 4 Si l appareil n est pas doté d un interrupteur secteur pour le couper du secteur ou si l interrupteur secteur disponible n est pas approprié pour couper l appareil du secteur le connecteur mâle du câble de raccordement est à considérer comme interrupteur L interrupteur doit être à tout moment facilement accessible Si par exemple le connecteur secteur se...

Page 39: ...lorsque le produit est en cours de service Les câbles et composants électriques seraient ainsi accessibles ce qui peut entraîner des blessures des incendies ou des dégâts sur le produit 12 Si un produit est connecté de façon permanente établir avant toute autre connexion le raccordement du conducteur de protection local et du conducteur de protection du produit L installation et le raccordement ne...

Page 40: ...l acétone ou un solvant à base de cellulose Fonctionnement 1 L utilisation du produit exige une formation spécifique ainsi qu une grande concentration Il est impératif que les personnes qui utilisent le produit présent les aptitudes physiques mentales et psychiques requises sinon des dommages corporels ou matériels ne pourront pas être exclus Le choix du personnel qualifié pour l utilisation du pr...

Page 41: ... concentrée les lasers peuvent provoquer des dommages biologiques Si un produit laser est intégré dans un produit Rohde Schwarz par exemple lecteur CD DVD il ne faut pas utiliser de réglages ou fonctions autres que ceux décrits dans la documentation produit pour éviter tout dommage corporel par exemple causé par rayon laser 8 Classes CEM selon EN 55011 CISPR 11 selon EN 55022 CISPR 22 EN 55032 CIS...

Page 42: ...as ou insuffisamment respectées cela peut provoquer des explosions des incendies et ou des blessures graves pouvant entraîner la mort La manipulation de piles batteries et accumulateurs contenant des électrolytes alcalins par exemple cellules de lithium doit être conforme à la norme EN 62133 1 Les cellules ne doivent pas être démontées ouvertes ni réduites en morceaux 2 Ne jamais exposer les cellu...

Page 43: ...donc proscrit d utiliser ces poignées pour attacher le produit à ou sur des moyens de transport tels que grues chariots élévateurs camions etc Vous êtes responsable de la fixation sûre des produits à ou sur des moyens de transport et de levage appropriés Observer les consignes de sécurité du constructeur des moyens de transport ou de levage utilisés pour éviter des dommages corporels et des dégâts...

Page 44: ...héant Le démontage du produit ne doit donc être effectué que par du personnel qualifié Le démontage inadéquat peut nuire à la santé Les directives nationales pour l élimination des déchets doivent être observées 4 Si en cas d utilisation du produit des matières dangereuses ou des combustibles sont dégagés qui exigent une élimination spéciale comme par exemple liquides de refroidissement ou huiles ...

Page 45: ...rument up to date and to be informed about new application notes related to your instrument please send an e mail to the Customer Support Center stating your instrument and your wish We will take care that you will get the right information Europe Africa Middle East Phone 49 89 4129 12345 customersupport rohde schwarz com North America Phone 1 888 TEST RSA 1 888 837 8772 customer support rsa rohde...

Page 46: ...s and Items 10 1 5 1 Accessories Supplied 11 1 5 2 Optional Accessories 12 1 5 3 Service Accessories 13 2 Putting into Operation 14 2 1 Connecting the Probe to the R S RTO Oscilloscope 16 2 2 Auto Zero 16 3 Connecting the Probe to the DUT 18 4 Measurement Principles 21 4 1 Signal Integrity of the Transferred Signal 23 4 1 1 Bandwidth 23 4 1 2 Performance with Different Connection Types 24 4 2 Sign...

Page 47: ...Contents R S RT ZZ80 4 User Manual 1409 7689 02 02 5 Maintenance and Service 32 5 1 Service Strategy 32 5 2 Returning the Probe for Servicing 32 5 3 Cleaning 33 5 4 Calibration Interval 33 Index 34 ...

Page 48: ...es supplied with the R S RT ZZ80 Risk of electric shock Do not connect an R S RT ZZ80 to any voltage that exceeds the maximum permissible input voltage specified in the data sheet Non compliance with this instruction carries the risk of an electric shock Make sure not to cause any short circuits when performing measurements on sources with high output currents Short circuits may cause injuries or ...

Page 49: ...ut impedance at high frequencies Lower input impedance at DC Thus transmission line probes are best suited for measurements of broadband single ended signals in impedance controlled environments for example 50 Ω lines The R S RT ZZ80 has a wide dynamic range High input levels up to 20 V RMS can be measured without distortion The low inherent noise enables the measure ment of small input signals Th...

Page 50: ...ics of the probe are the following Bandwidth DC to 8 GHz Maximum input voltage 20 V RMS Input resistance 500 Ω Input capacitance 0 3 pF Full dynamic range over the entire frequency range No harmonic distortions Negligible noise contribution Standard SMA connector 1 3 Unpacking the Instrument The carrying case contains the following items R S RT ZZ80 transmission line probe Carrying case Accessory ...

Page 51: ... the accessories If the contents are incomplete or damaged notify your Rohde Schwarz ser vice center Accessories supplied with the instrument are listed in chapter 1 5 1 Accesso ries Supplied on page 11 1 4 Description of the Probe The probe consists of the probe head for connection to the DUT the probe cable and the SMA connector Probe connection To a base unit with SMA inputs direct connection T...

Page 52: ...ensure opti mal performance The signal socket is not compatible to standard accesso ries based on 0 64 mm 25 mil square pins or 0 8 mm 35 mil round pins Use only special accessories for R S RT ZZ80 provided by Rohde Schwarz 1 4 2 SMA Connector and SMA to BNC Adapter The R S RT ZZ80 has an SMA male connector for connection to the instrument To connect the probe to an Rohde Schwarz oscilloscope for ...

Page 53: ...w shows all accessories that are available for the R S RT ZZ80 transmission line probe SMA BNC adapter lead 15 cm 5 9 in ground adapter square pin ground pin pogo ground pin solder in signal adapter square pin signal pin signal pin solder in lead 6 cm 2 4 in micro clip mini clip marker band kit Fig 1 1 Available accessories Accessories and Items ...

Page 54: ...1 Accessories Supplied The following table shows the accessories supplied with the R S RT ZZ80 trans mission line probe Table 1 1 Accessories supplied Item Quantity Description 50 Signal pin solder in 2 Signal pin 2 Signal adapter square pin 10 Ground pin solder in 2 Ground pin pogo 2 Ground adapter square pin Accessories and Items ...

Page 55: ...eet individual customer requirements Rohde Schwarz offers different accessory sets for sale Table 1 2 R S RT ZA4 mini clips Item Quantity Description Mini clip 10 This set contains mini clips Table 1 3 R S RT ZA5 micro clips Item Quantity Description Micro clip 4 This set contains micro clips Table 1 4 R S RT ZA6 lead set Item Quantity Description Lead 6 cm 2 4 in Lead 15 cm 5 9 in 5 5 This set co...

Page 56: ...or mak ing performance tests and for servicing The service kit includes all adapters and accessories to connect the probe to the required measuring instruments The R S RT ZZ80 Service Manual is included in the service kit CD ROM Table 1 6 R S RT ZZ80 Service Manual The Service Manual contains a detailed description of the performance test for verifying the probe spec ifications All service accesso...

Page 57: ... the probe tip Exercise care to prevent the probe from receiving mechanical shock Avoid putting excessive strain on the probe cable or exposing it to sharp bends Store the probe in a shock resistant case such as the foam lined shipping case that came with the probe Voltages above the specified limits of the R S RT ZZ80 transmission line probe may damage the probe Do not exceed the specified limits...

Page 58: ... against electrostatic discharge ESD Wrist strap with cord Ground connection of operational site Heel strap Floor mat Building ground Ground connection of operational site Heel strap Floor mat Wrist strap with cord The following two methods of ESD protection may be used together or sep arately Wrist strap with cord to ground connection Conductive floor mat and heel strap combination ...

Page 59: ...heck that it is locked securely 3 On the Vertical menu of the R S RTO select Probe Setup 4 Select the Predefined probe RT ZZ80 If you use another oscilloscope make sure to configure the following settings Input impedance of the channel 50 Ω Unit V Attenuation 10 1 2 2 Auto Zero The auto zero procedure performs an automatic correction of the zero error dis played on the oscilloscope s screen The wa...

Page 60: ...ement results 1 Connect the probe to the R S RTO oscilloscope and configure the probe as described in chapter 2 1 Connecting the Probe to the R S RTO Oscillo scope on page 16 2 Short the signal pin and the ground pin together and connect them to the ground of the DUT 3 Start the auto zero procedure on the R S RTO Vertical menu Probe Setup Ch tab Auto zero Auto Zero ...

Page 61: ...in accessories are very fine and sensitive The probe should be stabilized by using appropriate means e g adhesive tape probe posi tioner in order to protect the solder joint from excessive mechanical stress Pins Signal pin and ground pin pogo Using the signal pin and ground pin manual measurements can be performed without or with only minor limitation of the measurement bandwith Best results are a...

Page 62: ...emain in the circuit Thus you can plug the probe on different test points Use tweezers to insert the solder in pins into the sockets on the probe and then cut to the appropriate length Keep the pins as short as possible The fine wires on this adapter are best suited to make secure contact with small contact points such as SMT components or IC pins Alternatively the signal pin has a solder tail for...

Page 63: ... in pin adapters for ground and signal the probe can be connected directly to a pin strip The sockets are compatible with 0 64 mm 25 mil square pins and 0 6 mm to 0 8 mm 24 mil to 35 mil round pins The distance between the signal and ground adapter can be adjusted by turning the ground adapter Distance range 2 54 mm to 10 16 mm 100 mil to 400 mil ...

Page 64: ...auses only minimum alterations How the probe can fulfill this requirement is mainly determined by its band width Acceptable loading of the input signal Every probe is a load for the signal to be measured This means that the sig nal to be measured changes as soon as the probe is connected A good probe should cause a minimum change to the signal also at higher frequen cies How the probe can fulfill ...

Page 65: ...put voltage of the probe RS Source resistance of the DUT RL Load resistance of the DUT Rin Input resistance of the probe Cin Input capacitance of the probe Lcon Connection inductance depends on the type of connection In a 50 Ω system the output resistance of the source the load resistance of the DUT and the characteristic impedance of all lines equal exactly 50 Ω However the behavior of the probe ...

Page 66: ... one of its specific parameters The bandwidth of the probe and the bandwidth of the base unit together form the system band width The following explanations refer to the probe itself but can also be applied to the entire system Fig 4 2 Amplitude frequency response of the R S RT ZZ80 The bandwidth Specifies the maximum frequency at which a purely sinusoidal signal is still transferred at 70 3 dB of...

Page 67: ...al step response of an R S RT ZZ80 transmission line probe Fig 4 3 Step response of the R S RT ZZ80 In addition to bandwidth a constant amplitude frequency response of the probe is decisive for high signal integrity The figure 4 2 shows the typical amplitude fre quency response of an R S RT ZZ80 transmission line probe 4 1 2 Performance with Different Connection Types The table 4 2 shows three typ...

Page 68: ...pedance Zmin Over shoot Signal socket Ground socket 1 signal pin ground pin pogo wide spacing 55 ps 7 5 GHz 100 Ω 12 narrow spacing 49 ps 9 5 GHz 80 Ω 24 2 signal pin sol der in ground pin sol der in short pins 54 ps 8 GHz 130 Ω 11 long pins 53 ps 5 GHz 165 Ω 14 3 signal adapter square pin ground adapter square pin wide spacing 56 ps 8 5 GHz 100 Ω 12 narrow spacing 49 ps 11 GHz 45 Ω 32 Signal Inte...

Page 69: ...les R S RT ZZ80 26 User Manual 1409 7689 02 02 Fig 4 4 Step response of the R S RT ZZ80 with a type 1 connection Fig 4 5 Step response of the R S RT ZZ80 with a type 2 connection Signal Integrity of the Transferred Signal ...

Page 70: ...Probes Traditional passive probes have a high input impedance at DC typically from 1 MΩ to 10 MΩ that quickly decreases with rising frequency For DC the load of the DUT is usually negligible but high frequency signals are loaded all the more On the contrary transmission line probes have a very low input impedance at DC typically from a few 100 Ω to 1 kΩ This results in a significant higher load of...

Page 71: ...sive probes 4 2 2 Input Impedance The input signal loading caused by the probe is determined by its input impe dance Zin The figure 4 1 presents an equivalent circuit model Zin consists of the following probe specific parameters Input resistance Rin Input capacitance Cin Minimum input impedance Zmin The resulting input impedance versus frequency is indicated in figure 4 7 The trace shows three cha...

Page 72: ...nual 1409 7689 02 02 Fig 4 7 Magnitude of the input impedance of the R S RT ZZ80 probe as a function of fre quency Fig 4 8 Signal loading caused by the R S RT ZZ80 probe at an effective source impe dance of 25 Ω Signal Loading of the Input Signal ...

Page 73: ...ion Dependence on Source Impedance The previous sections made clear that probes exert a load on the signal to be measured and change its characteristic The signal at the test point where the probe makes contact Vin is therefore different from the signal that was present before the probe was connected VS In contrast to most other probes the load of the R S RT ZZ80 is not negligible for DC and low f...

Page 74: ...e of 25 Ω To calculate the exact attenuation of the probe use the following equation S in in out R Z U U Ω 50 Uout output voltage Uin unloaded input voltage Zin input impedance of R S RT ZZ80 R S effective source impedance Example for an 50 Ω environment 0952 0 Ω 25 Ω 500 Ω 50 in out U U Attenuation Dependence on Source Impedance ...

Page 75: ...hde Schwarz service center for diagnosis and exchange You can return the R S RT ZZ80 transmission line probe for calibration The ser vice personnel will perform the required tests 5 2 Returning the Probe for Servicing Use the original packaging to return your Rohde Schwarz probe to your Rohde Schwarz service center If you cannot use the original packaging consider the following 1 Use a sufficientl...

Page 76: ... agents Cleaning agents contain substances that may damage the instrument for example solvent may damage the labeling or plastic parts Never use cleaning agents such as solvents thinners acetone etc acids bases or other substances 5 4 Calibration Interval The recommended calibration interval for R S RT ZZ80 transmission line probe is two years For servicing send the probe to your nearest Rohde Sch...

Page 77: ...Leads 12 M Maintenance 32 P Pins Inserting and removing 18 Usage 18 Probe Calibration 33 Cleaning 33 Connection 16 Returning 32 Probe head 8 Probing principles 21 S Service 32 Service kit 13 Signal integrity 23 Signal loading 27 Source impedance 30 Step response 24 U Unpacking 7 Using accessories Ground adapter square pin 20 Ground pin pogo 18 Ground pin solder in 19 Signal adapter square pin 20 S...

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