R&S RT-ZD10 User Manual
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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)
1410455002

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Summary of Contents for R&S RT-ZD10

  • Page 1 ® R&S RT‑ZD10/20/30 Active Differential Probe ® R&S RT‑ZA15 External Attenuator User Manual (>:]À2) 1410455002...
  • Page 2 Trade names are trademarks of the owners. ® 1410.4550.02 | Version 05 | R&S RT‑ZD10/20/30 Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol and without ® product type numbers, e.g. R&S RT-RT-ZD10/20/30 is indicated as R&S RT-ZD10/20/30.

  • Page 3: Table Of Contents

    ® Contents R&S RT‑ZD10/20/30 Contents 1 Product Description.............. 5 1.1 Key Features and Key Characteristics..........5 1.2 Unpacking....................7 1.3 Description of the Probe..............8 1.4 Accessories and Items................. 9 2 Putting into Operation............15 2.1 Connecting the Probe to the Oscilloscope........16 2.2 Identification of the Probe..............17 2.3 Using the Probe..................
  • Page 4 ® Contents R&S RT‑ZD10/20/30 7 Maintenance and Service............51 7.1 Cleaning....................51 7.2 Contacting Customer Support............51 7.3 Returning for Servicing..............52 7.4 Calibration Interval................53 7.5 Discarding the Product..............53 7.6 Spare Parts..................53 8 Functional Check..............56 Index..................57 User Manual 1410.4550.02 ─ 05...

  • Page 5: 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 is used for differential voltage measurements from DC to 1.0 GHz, 1.5 GHz, and 3 GHz, respectively.
  • Page 6 1.1.1 Key Characteristics The key characteristics of the probe are the following: 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...

  • Page 7: Unpacking

    ● Documentation of calibration values (if ordered) ● R&S RT-ZA15 external attenuator (only with R&S RT-ZD10) 1.2.1 Inspecting the Contents ● Inspect the package for damage. Keep the package and the cushioning material until the contents have been checked for completeness and the device has been tested.

  • Page 8: Description Of The Probe

    ® Product Description R&S RT‑ZD10/20/30 Description of the Probe ● Inspect the accessories. If the contents are incomplete or damaged, notify your Rohde & Schwarz ser- vice center. Accessories supplied with the device are listed in Chapter 1.4.1, "Accessories Supplied", on page 10.

  • Page 9: Accessories And Items

    ® Product Description R&S RT‑ZD10/20/30 Accessories and Items 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 to transmit analog signals and digital data simultaneously.
  • Page 10 ® Product Description R&S RT‑ZD10/20/30 Accessories and Items RT-ZA15 External Attenuator Figure 1-1: Available accessories 1.4.1 Accessories Supplied The following table shows the accessories supplied with the R&S RT‑ZD10/20/30 differential probe. User Manual 1410.4550.02 ─ 05...
  • Page 11 ® Product Description R&S RT‑ZD10/20/30 Accessories and Items 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 10 cm / 3.9 in Flex adapter, square pin, 4 cm / 1.6 in 10 cm / 3.9 in...
  • Page 12 ® Product Description R&S RT‑ZD10/20/30 Accessories and Items Item Quantity Description Lead, 15 cm / 5.9 in Mini clip Micro clip Marker band kit External attenuator (only with R&S RT‑ZD10) Adjustment tool (only with R&S RT‑ZD10) Carrying case with foam inlay User Manual 1410.4550.02 ─...

  • Page 13: Optional Accessories

    ® Product Description R&S RT‑ZD10/20/30 Accessories and Items For a list of spare parts, see Chapter 7.6, "Spare Parts", on page 53. 1.4.2 Optional Accessories If the delivered accessories do not meet individual customer requirements, Rohde & Schwarz offers different accessory sets for sale. The order numbers are provided in the data sheet.
  • Page 14 ® Product Description R&S RT‑ZD10/20/30 Accessories and Items ‑ ZA15 external attenuator (optional for R&S RT ‑ ZD20/30) Table 1-7: R&S RT External attenuator Adjustment tool 1.4.3 Service Accessories To order accessories for servicing the probe, contact your Rohde & Schwarz ser- vice center.

  • Page 15: Putting Into Operation

    ® Putting into Operation R&S RT‑ZD10/20/30 Putting into Operation The probe is designed for usage with oscilloscopes that have a Rohde & Schwarz probe interface. Supported Rohde & Schwarz oscilloscopes are listed in the pro- be's data sheet. Read and observe the printed "Basic Safety Instructions" that are delivered with the probe.

  • Page 16: Connecting The Probe To The Oscilloscope

    ® Putting into Operation R&S RT‑ZD10/20/30 Connecting the Probe to the Oscilloscope During usage, the probe slightly heats up. Warming is normal behavior and not a sign of malfunction. Damage caused by electrostatic discharge Electrostatic discharge (ESD) can damage the electronic components of the probe and the instrument, and also the device under test (DUT).

  • Page 17: Identification Of The Probe

    ® Putting into Operation R&S RT‑ZD10/20/30 Using the Probe ► To disconnect the probe: a) Press and hold the release button (3). b) Pull the probe box away from the oscilloscope. Identification of the Probe When the probe is connected to the oscilloscope, the oscilloscope recognizes the probe and reads out the probe-specific parameters.

  • Page 18: Offset Compensation

    ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation 4. Adjust the zero position of the waveform using the appropriate function of the oscilloscope ("AutoZero", "Zero Adjust" or similar). The waveform is set to 0 V on the horizontal centerline of the oscilloscope. 2.3.2 Micro Button The micro button provides easy and quick access to important functions of the...
  • Page 19 ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation 2.4.1 Differential Offset The differential offset compensation is often referred to as offset compensation. The differential offset function can compensate a DC voltage applied between the positive and the negative input socket. This is particularly helpful if a small single- ended signal with a large DC offset is measured with a differential probe, for example, with the negative input socket connected to ground.
  • Page 20 ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation 2.4.2 Common Mode Offset Common mode offset compensation is available for R&S RT‑ZD probes with serial number ≥ 200 000. It can compensate a common DC voltage applied to both input sockets (referenced to the ground socket). This is particularly helpful for measurements on differential signals with high common mode levels, for example, current measurements using a shunt resistor.
  • Page 21 ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation 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 38.
  • Page 22 ® Putting into Operation R&S RT‑ZD10/20/30 Offset Compensation ● High measurement accuracy and low temperature sensitivity. ● Simple means of setting the oscilloscope's trigger level and vertical scaling if a waveform is not visible. ● Independent of oscilloscope settings for offset, position, vertical scale, hori- zontal scale, and trigger.

  • Page 23: S Rt-Za15 External Attenuator

    Attenuation 100:1 Bandwidth DC to 1.0 GHz (with R&S RT-ZD10) DC to 1.5 GHz (with R&S RT-ZD20) DC to 2.0 GHz (with R&S RT-ZD30) Dynamic range (differential input) ±50 V with ±50 V offset capability Differential input resistance 1 MΩ...

  • Page 24: Description

    ® R&S RT‑ZA15 External Attenuator R&S RT‑ZD10/20/30 Inserting the Probe Description The R&S RT‑ZA15 external attenuator with inserted R&S RT‑ZD10/20/30 is shown in Figure 3-1. ‑ ZA15 external attenuator with inserted R&S RT ‑ ZD10/20/30 Figure 3-1: R&S RT 1 = Positive signal socket 2 = Negative signal socket 3 = Ground socket 4 = Trimmer for DC common mode rejection...

  • Page 25: 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 26 ® 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 27 ® 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 28 ® 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 29 ® 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 30: 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 31 ® 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 32 ® 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 33 ® 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 34 ® 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 35 ® 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 36: 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. Figure 5-1: Input voltages on a differential probe Multiple input voltages can be defined for a differential probe: ●...

  • Page 37: 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 obtained by super- imposing the voltages generated from the differential mode input voltage and from the common mode input voltage: ...

  • Page 38: 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 to characterize the permissible input voltage range of a differential voltage probe: ●...

  • Page 39: Ground Connection

    ® Characteristics of Differential Probes R&S RT‑ZD10/20/30 Ground Connection 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 40: 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 41 ® Measurement Principles R&S RT‑ZD10/20/30 ‑ ZD10/20/30 probe Figure 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 42: 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 43 ® 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 44 R&S RT-ZD30. For an R&S RT-ZD20, typical band- width and rise time values are smaller and limited to 1.5 GHz or 250 ps, respec- tively. For an R&S RT-ZD10, typical bandwidth and rise time values are also smaller and limited to 1.0 GHz or 350 ps, respectively.
  • Page 45 ® Measurement Principles R&S RT‑ZD10/20/30 Signal Integrity of the Transferred Signal User Manual 1410.4550.02 ─ 05...

  • Page 46: Signal Loading Of The Input Signal

    ® 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 47 ® 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 differential probe. The differential input impedance of the probe is equal to the impedance between its positive (+) and the negative (-) signal socket.
  • Page 48 ® 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 49: Probing Philosophy

    ® 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 36, various types of input signals can be measured with a differential probe. Every type of input signal has an associated input impedance. ●...
  • Page 50 ® Measurement Principles R&S RT‑ZD10/20/30 Probing Philosophy As a result, there are different opinions which signal is the better output of the probe: ● 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 51: Maintenance And Service

    ® Maintenance and Service R&S RT‑ZD10/20/30 Contacting Customer Support Maintenance and Service Like all Rohde & Schwarz products, Rohde & Schwarz probes and adapters are of high quality and require only minimum service and repair. However, if service or calibration is needed, contact your Rohde & Schwarz service center. Return a defective product to the Rohde &...

  • Page 52: Returning For Servicing

    ® Maintenance and Service R&S RT‑ZD10/20/30 Returning for Servicing 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-schwarz.com Latin America Phone +1-410-910-7988 customersupport.la@rohde-schwarz.com Asia/Pacific Phone +65 65 13 04 88 customersupport.asia@rohde-schwarz.com China Phone +86-800-810-8228 / +86-400-650-5896 customersupport.china@rohde-schwarz.com Returning for Servicing Use the original packaging to return your R&S RT‑ZD10/20/30 to your...

  • Page 53: Calibration Interval

    ® Maintenance and Service R&S RT‑ZD10/20/30 Spare Parts 4. Seal the box with tape. 5. Address the package to your nearest Rohde & Schwarz service center. Calibration Interval The recommended calibration interval for R&S RT‑ZD10/20/30 differential probe is two years. For servicing, send the probe to your nearest Rohde & Schwarz ser- vice center (see Chapter 7.3, "Returning for Servicing",...
  • Page 54 ® Maintenance and Service R&S RT‑ZD10/20/30 Spare Parts Pos Item Description Material Number Browser adapter 1417.0509.00 Adapter, square pin 1417.0573.00 Flex adapter, solder-in, 1417.0596.00 4 cm / 1.6 in 10 cm / 3.9 in Flex adapter, square pin, 1417.0580.00 4 cm / 1.6 in 10 cm / 3.9 in Lead, 6 cm / 2.4 in 1416.0128.00...
  • Page 55 ® Maintenance and Service R&S RT‑ZD10/20/30 Spare Parts Pos Item Description Material Number Mini clip 1416.0105.00 Micro clip 1416.0111.00 Marker band kit 1416.0205.00 External attenuator 1410.4744.02 Adjustment tool 1416.0057.00 Pogo pin Pogo pin connector, 6 pins 3584.6396.00 R&S RT-ZK2 R&S RT-ZK2 service kit 1410.5305.02 Table 7-2: Parts for ESD prevention Pos.

  • Page 56: Functional Check

    ® Functional Check R&S RT‑ZD10/20/30 Functional Check The functional check confirms the basic operation of the R&S RT‑ZD10/20/30 dif- ferential probe. The functional check is not suitable for verifying compliance with the probe specifications. 1. Connect the R&S RT‑ZD10/20/30 to a Rohde & Schwarz oscilloscope as described in Chapter 2.1, "Connecting the Probe to the Oscilloscope",...

  • Page 57: Index

    ® Index R&S RT‑ZD10/20/30 Index Accessories ..........10 Leads ............13 AutoZero ..........17 Loading ............46 Bandwidth ..........6, 42 Micro button .........6, 18 Cleaning ..........51 N/USB adapter ........13 Clipping ........... 39 Clips ............13 CMRR ..........37, 46 Operating voltage window ....... 38 Common mode input voltage ....
  • Page 58 AlliCE Messtechnik GmbH make ALLICE your partner ALLICE Messtechnik GmbH Kelsterbacher Strasse 15-19 60528 Frankfurt am Main Tel.: +49(0)69-67724-583 Fax: +49(0)69-67724-582 info@allice.de www.allice.de © 2019 Allice Messtechnik GmbH – Alle Rechte vorbehalten. © 2019 Allice Messtechnik GmbH – All rights reserved Verwendete Warenzeichen und Schutzrechte sind Eigentum der jeweiligen Hersteller.

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