Rohde & Schwarz R&S RT-ZD10 User Manual
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Rohde & Schwarz R&S RT-ZD10 User Manual

Active differential probe, external attenuator
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®
R&S
RT‑ZD10/20/30
Active Differential Probe
®
R&S
RT‑ZA15
External Attenuator
User Manual
(>:]À2)
1410.4550.02 ─ 01

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Summary of Contents for Rohde & Schwarz R&S RT-ZD10

  • Page 1 ® R&S RT‑ZD10/20/30 Active Differential Probe ® R&S RT‑ZA15 External Attenuator User Manual (>:]À2) 1410.4550.02 ─ 01...
  • Page 2 ® This user manual describes the following R&S RT-ZD models and external attenuators: ● R&S ® RT-ZD10 (1410.4715.02) ● R&S ® RT-ZD20 (1410.4409.02) ● R&S ® RT-ZD30 (1410.4609.02) ● R&S ® RT-ZA15 (1410.4744.02) The firmware of the instrument makes use of several valuable open source software packages. The most important of them are listed below, together with their corresponding open source license.
  • Page 3 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.
  • Page 4 Basic Safety Instructions 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 Symbol Meaning Notice, general danger location ON/OFF supply voltage Observe product documentation...
  • Page 5 Basic Safety Instructions 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.
  • Page 6 Basic Safety Instructions 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.
  • Page 7 Basic Safety Instructions 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.
  • Page 8 Basic Safety Instructions 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.
  • Page 9 Basic Safety Instructions 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.
  • Page 10 Basic Safety Instructions 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.
  • Page 11 Basic Safety Instructions 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.
  • Page 12 Instrucciones de seguridad elementales 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.
  • Page 13 Instrucciones de seguridad elementales 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.
  • Page 14 Instrucciones de seguridad elementales Símbolo Significado Símbolo Significado Aviso: Cuidado en el manejo de Distintivo de la UE para la dispositivos sensibles a la eliminación por separado de electrostática (ESD) dispositivos eléctricos y electrónicos Más información en la sección "Eliminación/protección del medio ambiente", punto 2.
  • Page 15 Instrucciones de seguridad elementales 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.
  • Page 16 Instrucciones de seguridad elementales 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.
  • Page 17 Instrucciones de seguridad elementales 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...
  • Page 18 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.
  • Page 19 Instrucciones de seguridad elementales 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.
  • Page 20 Instrucciones de seguridad elementales 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.
  • Page 21 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.
  • Page 22 Instrucciones de seguridad elementales 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.
  • Page 23 Safety Instructions - Informaciones de seguridad Safety Instructions for Active Voltage Probes When handling active voltage probes, the following basic rules must be observed. Prior to using an active voltage probe, read the applicable manual including the safety instructions. Keep the safety instructions and the product documentation in a safe place and pass them on to other users.
  • Page 24 Safety Instructions - Informaciones de seguridad Informaciones de seguridad para el uso de sondas de voltaje activas A la hora de manejar una sonda de voltaje activa, es necesario seguir las siguientes instrucciones de uso básicas. Lea primero el manual de manejo correspondiente incluyendo las instrucciones de seguridad.
  • Page 25 Customer Support Technical support – where and when you need it For quick, expert help with any Rohde & Schwarz equipment, contact one of our Customer Support Centers. A team of highly qualified engineers provides telephone support and will work with you to find a solution to your query on any aspect of the operation, programming or applications of Rohde &...

  • Page 26: Table Of Contents

    ® Contents R&S RT‑ZD10/20/30 Contents 1 Product Description.............. 7 1.1 Key Features and Key Characteristics..........7 1.1.1 Key Characteristics................. 7 1.1.2 Key Features...................8 1.2 Unpacking the Instrument..............9 1.2.1 Inspecting the Contents................9 1.3 Description of the Probe..............10 1.3.1 Probe Head...................10 1.3.2 Probe Box.....................
  • Page 27 ® Contents R&S RT‑ZD10/20/30 3.2 Description..................27 3.3 Inserting the Probe................28 3.4 Adjusting..................... 29 3.5 Maximum Input Voltage..............34 4 Connecting the Probe to the DUT........35 5 Characteristics of Differential Probes....... 41 5.1 Common Mode Rejection Ratio (CMRR)...........42 5.2 Dynamic Range and Operating Voltage Window......43 5.3 Maximum Non-Destructive Input Voltage.........
  • Page 28 ® Contents R&S RT‑ZD10/20/30 8.2 DC Offset..................... 61 8.3 DC Accuracy..................62 8.4 Offset Compensation................63 Index..................64 User Manual 1410.4550.02 ─ 01...
  • Page 29 ® Contents R&S RT‑ZD10/20/30 User Manual 1410.4550.02 ─ 01...

  • Page 30: Product Description

    ® Product Description R&S RT‑ZD10/20/30 Key Features and Key Characteristics Product Description Key Features and Key Characteristics The R&S RT‑ZD10/20/30 is a differential probe with high input impedance. It allows the user to make differential voltage measurements from DC to 1.0 GHz, 1.5 GHz, and 3 GHz, respectively.

  • Page 31: Key Features

    ® Product Description R&S RT‑ZD10/20/30 Key Features and Key Characteristics Bandwidth DC to 1.0 GHz (R&S RT-ZD10) DC to 1.5 GHz (R&S RT-ZD20) DC to 3.0 GHz (R&S RT-ZD30) Dynamic range ±5 V with ±5 V offset capability (differential input) 10 V AC (Vpp) Operating voltage window ±8 V with ±22 V common mode offset capability...

  • Page 32: Unpacking The Instrument

    ® Product Description R&S RT‑ZD10/20/30 Unpacking the Instrument measurement. If activated on the base unit, the measurement value is displayed on the screen of the R&S oscilloscope. For details, see chapter 2.4, "R&S Probe- Meter", on page 25. The R&S ProbeMeter records both differential and common mode DC voltages. Data memory The probe includes an integrated data memory with individual probe correction parameters (e.g.

  • Page 33: Description Of The Probe

    ® Product Description R&S RT‑ZD10/20/30 Description of the Probe If there is any damage or defect, or if the R&S RT‑ZD10/20/30 differential probe does not operate properly, notify your Rohde & Schwarz service center. ● Inspect the accessories. If the contents are incomplete or damaged, notify your Rohde & Schwarz ser- vice center.

  • Page 34: Probe Box

    ® Product Description R&S RT‑ZD10/20/30 Description of the Probe 1.3.2 Probe Box The probe box connects the probe and the oscilloscope via the Rohde & Schwarz probe interface. The Rohde & Schwarz probe interface contains a male precision 7 mm (276 mil) BNC connector and six pogo pin connectors. This interface pro- vides the required supply voltage and is also used for simultaneously transmitting analog signals and digital data.

  • Page 35: Accessories And Items

    ® Product Description R&S RT‑ZD10/20/30 Accessories and Items Accessories and Items The figure below shows all accessories that are available for the R&S RT‑ZD10/20/30 differential probe. RT-ZA15 External Attenuator Fig. 1-1: Available accessories User Manual 1410.4550.02 ─ 01...

  • Page 36: Accessories Supplied

    ® Product Description R&S RT‑ZD10/20/30 Accessories and Items 1.4.1 Accessories Supplied The following table shows the accessories supplied with the R&S RT‑ZD10/20/30 differential probe. Table 1-1: Accessories supplied Item Quantity Description Signal pin, solder-in Signal pin, variable spacing Browser adapter Adapter, square pin Flex adapter, solder-in, 4 cm / 1.6 in...
  • Page 37 ® Product Description R&S RT‑ZD10/20/30 Accessories and Items Item Quantity Description Lead, 6 cm / 2.4 in Lead, 15 cm / 5.9 in Mini clip Micro clip Marker band kit External attenuator (only with R&S RT‑ZD10) User Manual 1410.4550.02 ─ 01...

  • Page 38: Optional Accessories

    ® Product Description R&S RT‑ZD10/20/30 Accessories and Items Item Quantity Description Adjustment tool (only with R&S RT‑ZD10) Carrying case with foam inlay 1.4.2 Optional Accessories If the included accessories do not meet individual customer requirements, Rohde & Schwarz offers different accessory sets for sale. ‑...

  • Page 39: Service Accessories

    ® Product Description R&S RT‑ZD10/20/30 Accessories and Items ‑ ZA9 probe box to N / USB adapter Table 1-6: R&S RT The adapter can be used to connect the R&S RT‑ZD10/20/30 differential probe to any other oscilloscope or any other measurement instrument (e.g.
  • Page 40 ® Product Description R&S RT‑ZD10/20/30 Accessories and Items ‑ ZD10/20/30 Service Manual Table 1-9: R&S RT The Service Manual contains a detailed description of the performance test for verifying the probe spec- ifications. All service accessories and items can be ordered from your Rohde & Schwarz service center.

  • Page 41: Putting Into Operation

    ® Putting into Operation R&S RT‑ZD10/20/30 Putting into Operation The R&S RT‑ZD10/20/30 differential probe has been designed to withstand a moderate amount of physical and electrical stress. You should treat the probe with care. It can be damaged if excessive force is applied to the probe tip. Exercise care to prevent the probe from receiving mechanical shock.

  • Page 42: Installation

    ® Putting into Operation R&S RT‑ZD10/20/30 Installation 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 Wrist strap with cord Building ground Floor mat Floor mat Heel strap Heel strap...

  • Page 43: Connecting The Probe To The R&S Rto Oscilloscope

    ® Putting into Operation R&S RT‑ZD10/20/30 Installation All settings of the base unit described in this section refer to the R&S RTO oscilloscope. If any other oscilloscope is used, differences in settings and menu navigation may be possible. 2.1.1 Connecting the Probe to the R&S RTO Oscilloscope The R&S RT‑ZD10/20/30 differential probe has been designed for use with R&S RTO oscilloscopes.

  • Page 44: Autozero

    ® Putting into Operation R&S RT‑ZD10/20/30 Installation As soon as the probe is connected to the oscilloscope and the settings are adjus- ted, the waveform is shown for the channel to which the probe is connected. To display probe-specific settings and information: ►...

  • Page 45: Micro Button

    ® Putting into Operation R&S RT‑ZD10/20/30 Micro Button Micro Button The micro button provides easy and quick access to important functions of the R&S RTO. After a function has been assigned, pressing the micro button remotely controls this specific function on the base unit. For example, Continuous Run and AutoZero are commonly assigned to the micro button.
  • Page 46 ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation Fig. 2-2: Differential offset compensation for a single-ended measurement (negative input ‑ ZD10/20/30 connected to ground) using an R&S RT To set the differential offset compensation on the front panel 1. Press the Vertical Position knob until the "Offset" setup is shown on the dis- play.

  • Page 47: Common Mode Offset

    ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation To assign "Set offset to mean" to the micro button ► "Vertical" menu > "Probe Setup" > "Ch" tab > "Micro button action" = "Set off- set to mean" 2.3.2 Common Mode Offset Common mode offset compensation is available for R&S RT‑ZD probes with serial number ≥...

  • Page 48: R&S Probemeter

    ® Putting into Operation R&S RT‑ZD10/20/30 R&S ProbeMeter The R&S RT‑ZD10/20/30 measures only differential input signals. Common mode signals are suppressed by the probe. Therefore, the common mode offset compensation is not directly visible on the oscilloscope screen, see also chapter 5.2, "Dynamic Range and Operating Voltage Window", on page 43.
  • Page 49 ® Putting into Operation R&S RT‑ZD10/20/30 R&S ProbeMeter ● Provides a simple means of setting the oscilloscope's trigger level and vertical scaling if a waveform is not visible. ● Offers a unique way to detect unexpected or inadmissible common mode vol- tages, e.g.

  • Page 50: S Rt-Za15 External Attenuator

    ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Key Characteristics R&S RT‑ZA15 External Attenuator The R&S RT‑ZA15 is an external 10:1 attenuator for the R&S RT‑ZD10/20/30 dif- ferential probe. It extends the input voltage range of the R&S RT‑ZD10/20/30 probe. Both dynamic range and operating voltage window are increased. Key Characteristics The combination of R&S RT‑ZA15 external attenuator and R&S RT‑ZD10/20/30 differential probe has the following key characteristics:...

  • Page 51: Inserting The Probe

    ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Inserting the Probe ‑ ZA15 external attenuator with inserted R&S RT ‑ ZD10/20/30 Fig. 3-1: R&S RT 1 = Positive signal socket 2 = Negative signal socket 3 = Ground socket 4 = Trimmer for DC common mode rejection 5 = Trimmer for pulse response of positive input 6 = Trimmer for pulse response of negative input 7 = Notch for micro button...

  • Page 52: Adjusting

    ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Adjusting Attaching the attenuator with wrong polarity can damage the probe and the external attenuator. 3. Press the probe gently into the attenuator until the micro button matches the notch on the attenuator in a central position. 4.
  • Page 53 ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Adjusting Adjusting the DC common mode rejection ● Equipment R&S RTO oscilloscope ● DC voltage source, max. output voltage 30 V, floating output, e.g. HMP4040 ● BNC to 4 mm dual banana adapter ●...
  • Page 54 ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Adjusting ● R&S RTO settings Horizontal scale = 1 ms/div ● Bandwidth = 20 MHz ● Vertical scale = 100 mV/div ● Trigger source = Ch1, Trigger mode = Auto, Run cont ● ACQUISITION key >...
  • Page 55 ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Adjusting Adjusting the pulse response of the positive and negative inputs ● Equipment R&S RTO oscilloscope ● 1 mini clip 1 lead 6 cm/2.4 in Setup Pulse response of the positive input: ● Connect the probe to CH1 of the R&S RTO oscilloscope.
  • Page 56 ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Adjusting ● Adjustment Using the adjustment tool, turn the trimmer for pulse response of the positive input on the external attenuator until an optimum square wave response is visible on the oscilloscope screen. Setup and adjust- Repeat the procedure to adjust the pulse response of the negative input: ment...

  • Page 57: Maximum Input Voltage

    ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Maximum Input Voltage Maximum Input Voltage The maximum input voltage of the R&S RT‑ZA15 external attenuator is specified as the maximum voltage between each signal socket and ground. Shock hazard caused by high voltages To avoid electric shock and personal injury, and to prevent damage to the probe or any other products connected to it, observe the following instruc- tions:...

  • Page 58: Connecting The Probe To The Dut

    ® Connecting the Probe to the DUT R&S RT‑ZD10/20/30 Connecting the Probe to the DUT This chapter describes the different ways of connecting the probe to the DUT. In addition, the accessories supplied are described and their use is explained. In order to achieve optimum RF performance, the connections should always be as short as possible.
  • Page 59 ® Connecting the Probe to the DUT R&S RT‑ZD10/20/30 Pins Signal pin, solder-in Use tweezers to insert the solder-in pins into the signal sockets on the probe, and then cut to the appropriate length. Try to keep the wires as short as possible. Finally, stabilize the probe, for example by using adhesive tape.
  • Page 60 ® Connecting the Probe to the DUT R&S RT‑ZD10/20/30 Adapters Adapter, square pin The square pin adapter is used for plugging the probe onto pin strips with a pitch of 2.54 mm (100 mil). Distance range: 2.54 mm (100 mil) Browser adapter The spring-loaded browser adapter allows handheld probing with maximum convenience.
  • Page 61 ® Connecting the Probe to the DUT R&S RT‑ZD10/20/30 Flex adapter, solder-in The flex adapter is particularly well suited for creating solid contact with test points that are hard to reach (e.g. between two inserted boards). The two wires at the tip of the flexible line are soldered to the contact points.
  • Page 62 ® Connecting the Probe to the DUT R&S RT‑ZD10/20/30 Leads and clips Short and long lead The lead provides a flexible connection to the DUT. It is plugged onto a pin on the DUT and can be used to connect either the signal sockets or the ground socket. In addition, it allows micro and mini clips to be connected to the probe.
  • Page 63 ® Connecting the Probe to the DUT R&S RT‑ZD10/20/30 Micro clip The micro clip is designed for probing IC pins and thin wires in fine-pitch applications. The micro clip fits directly into the signal socket or the ground socket using a lead. User Manual 1410.4550.02 ─...

  • Page 64: Characteristics Of Differential Probes

    ® Characteristics of Differential Probes R&S RT‑ZD10/20/30 Characteristics of Differential Probes A differential probe has three sockets: the positive signal socket (+), the negative signal socket (-), and the ground socket. Fig. 5-1: Input voltages on a differential probe Multiple input voltages can be defined for a differential probe: ●...

  • Page 65: Common Mode Rejection Ratio (Cmrr)

    ® Characteristics of Differential Probes R&S RT‑ZD10/20/30 Common Mode Rejection Ratio (CMRR) The output voltage V , which is displayed on the base unit, is generally obtained by superimposing the voltages generated from the differential mode input voltage and from the common mode input voltage: ...

  • Page 66: Dynamic Range And Operating Voltage Window

    ® Characteristics of Differential Probes R&S RT‑ZD10/20/30 Dynamic Range and Operating Voltage Window ● Probing on ground-referenced signals. In this case, the common mode com- ponent is always equal to half of the input voltage. Dynamic Range and Operating Voltage Window Two separate specifications are necessary in order to characterize the permissi- ble input voltage range of a differential voltage probe: ●...

  • Page 67: Maximum Non-Destructive Input Voltage

    ® Characteristics of Differential Probes R&S RT‑ZD10/20/30 Maximum Non-Destructive Input Voltage Signal clipping Only differential input signals are detected by the probe and displayed by the base unit. Common mode signals are suppressed by the probe. There- fore, the user does not initially recognize that the operating voltage window is exceeded owing to inadmissible common mode voltages.
  • Page 68 ® Characteristics of Differential Probes R&S RT‑ZD10/20/30 Ground Connection age window of the probe being exceeded. In this case, the probe ground should be connected to the DUT ground. The ground connection can also affect the CMRR of the probe. Problems with unwanted common mode signals can often be improved by adding a ground con- nection.

  • Page 69: Measurement Principles

    ® Measurement Principles R&S RT‑ZD10/20/30 Measurement Principles The R&S RT‑ZD10/20/30 differential probe provides an electrical connection between the DUT and the oscilloscope. The probe transfers the voltage of the electrical signal tapped off the DUT to the oscilloscope, where it is displayed graphically.
  • Page 70 ® Measurement Principles R&S RT‑ZD10/20/30 ‑ ZD10/20/30 probe Fig. 6-1: Equivalent circuit model of the R&S RT Table 6-1: Designations Abbreviation Description Differential voltage between the test point without probe connected Differential voltage at the test point with probe connected, corre- sponds to the input voltage of the probe Differential source resistance of the DUT Differential load resistance of the DUT...

  • Page 71: Signal Integrity Of The Transferred Signal

    ® Measurement Principles R&S RT‑ZD10/20/30 Signal Integrity of the Transferred Signal Signal Integrity of the Transferred Signal The following sections describe the effect that bandwidth, connection inductance and common mode rejection ratio have on signal integrity. 6.1.1 Bandwidth The bandwidth BW of a probe is one of its specific parameters. The bandwidth of the probe and the bandwidth of the base unit together form the system band- width.
  • Page 72 ® Measurement Principles R&S RT‑ZD10/20/30 Signal Integrity of the Transferred Signal ● Specifies the transferable spectrum for other waveforms. E.g. with square wave signals, the fifth harmonic should still be within the bandwidth for a high signal integrity. ● Determines the minimum measurable signal rise time. The rise time t of the rise probe is inversely proportional to its bandwidth.

  • Page 73: Connection Inductance

    ® Measurement Principles R&S RT‑ZD10/20/30 Signal Integrity of the Transferred Signal 6.1.2 Connection Inductance The connection inductance L is caused by connecting the probe to the DUT. In contrast to the probe-specific bandwidth, the connection inductance mainly depends on the type of connection that the user selects. The connection inductance ●...
  • Page 74 ® Measurement Principles R&S RT‑ZD10/20/30 Signal Integrity of the Transferred Signal User Manual 1410.4550.02 ─ 01...

  • Page 75: Cmrr

    ® Measurement Principles R&S RT‑ZD10/20/30 Signal Loading of the Input Signal 6.1.3 CMRR The CMRR is very good for low-frequency signals, but it continuously decreases for higher frequencies. Therefore, the CMRR is usually specified as a function of frequency. figure 6-5 shows a typical CMRR for an R&S RT‑ZD10/20/30 differential probe with a very symmetrical connection to the DUT.

  • Page 76: Signal Loading For Differential Input Signals

    ® Measurement Principles R&S RT‑ZD10/20/30 Signal Loading of the Input Signal 6.2.1 Signal Loading for Differential Input Signals figure 6-1 presents an equivalent circuit model of an R&S RT‑ZD10/20/30 dif- ferential probe. The differential input impedance of the probe is equal to the impe- dance between its positive (+) and the negative (-) signal socket.
  • Page 77 ® Measurement Principles R&S RT‑ZD10/20/30 Signal Loading of the Input Signal 6.2.1.2 Input Capacitance C The input capacitance C causes the input impedance to decrease in the medium-frequency range (100 kHz to 1.0 GHz). It affects the settling time of the input voltage in the case of fast transients.

  • Page 78: Signal Loading For Non-Differential Input Signals

    ® Measurement Principles R&S RT‑ZD10/20/30 Probing Philosophy 6.2.2 Signal Loading for Non-Differential Input Signals As described in chapter 5, "Characteristics of Differential Probes", on page 41, various types of input signals can be measured with a differential probe. Every type of input signal has an associated input impedance. ●...
  • Page 79 ® Measurement Principles R&S RT‑ZD10/20/30 Probing Philosophy This has resulted in a difference of opinion as to which of the following two sig- nals should be output by the probe: 1. The initial signal that is not loaded by the probe (V ) and that corresponds to the signal at the test point without the probe being connected.

  • Page 80: Maintenance And Service

    ® Maintenance and Service R&S RT‑ZD10/20/30 Service Strategy Maintenance and Service Service Strategy Rohde & Schwarz probes are high-precision, high-performance instruments that extend the limits of today’s technological possibilities. Like all Rohde & Schwarz instruments, Rohde & Schwarz probes are of high quality and require only mini- mum service and repair.

  • Page 81: Cleaning

    ® Maintenance and Service R&S RT‑ZD10/20/30 Cleaning Cleaning To clean the exterior of the probe, use a soft cloth moistened with either distilled water or isopropyl alcohol. Before using the probe again, make sure to dry it com- pletely. Instrument damage caused by cleaning agents Cleaning agents contain substances that may damage the instrument;...

  • Page 82: Functional Check

    ® Functional Check R&S RT‑ZD10/20/30 Functional Check The functional check is used to perform a quick check of the most important func- tions of the R&S RT‑ZD10/20/30 differential probe using simple measurement equipment. The following functions are checked: ● Initialization ●...

  • Page 83: Initialization

    ® Functional Check R&S RT‑ZD10/20/30 Initialization Description Minimum requirements Recommended equipment Digital multimeter (DMM) −12 V to +12 V, Agilent 34401A Accuracy ± 0.01 % of mea- sured value BNC to 4 mm dual banana Pomona Model 1269 adapter Two banana leads (red, black) Multi-Contact ZG410 Probe accessories 2 mini clips...

  • Page 84: Dc Offset

    ® Functional Check R&S RT‑ZD10/20/30 DC Offset DC Offset The zero error of the probe-oscilloscope system and the zero error of the R&S ProbeMeter are checked. ● Test setup: Probe connected to CH1 of the R&S RTO oscilloscope ● Signal and ground terminal of the probe shortened by mini clip; make sure that there is no other ground connection.

  • Page 85: Dc Accuracy

    ® Functional Check R&S RT‑ZD10/20/30 DC Accuracy DC Accuracy The gain of the probe-oscilloscope system and the accuracy of the integrated DC voltmeter are checked. ● Test setup: Probe connected to CH1 of the R&S RTO oscilloscope ● INPUT HI/LO of the DMM connected to OUTPUT HI/LO of the DC voltage source by banana leads ●...

  • Page 86: Offset Compensation

    ® Functional Check R&S RT‑ZD10/20/30 Offset Compensation ● Measurement: Set the voltage on the DC voltage source so that the DMM displays exactly +5.000 V ● Check displayed values in the "Measurement Results" box: Mean: +5 V ± 250 mV ProbeMeter: +5 V ±...

  • Page 87: Index

    ® Index R&S RT‑ZD10/20/30 Index Accessories ..........13 Inductance ..........50 AutoZero ..........21 Initialization, check ........60 Input capacitance ........8 Input resistance ......... 8 Input voltages .......... 41 Bandwidth ..........8, 48 Leads ............15 Cleaning ..........58 Loading ............52 Clipping ........... 44 Clips ............
  • Page 88 ® Index R&S RT‑ZD10/20/30 Step response ......... 49 Test equipment for functional check ..59 Unpacking ..........9 Using accessories Adapter ..........37 Browser adapter ......... 37 Ground adapter, square pin ....38 Ground pin, solderable, offset .....38 Leads ..........39 Micro clip ..........40 Mini clip ..........

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