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Measurement Principles

R&S

®

RT-ZPR20

 

 R&S

®

RT-ZPR40

27

User Manual 1800.5035.02 ─ 03

5.3

 

Input Impedance

The input signal loading caused by the probe is determined by its input impe-
dance Z

in

. 

Figure 5-1

 illustrates an equivalent circuit model. The resulting input

impedance versus frequency is indicated in 

Figure 5-4

.

Figure 5-4: Example of the input impedance of the R&S

 

RT-ZPR20/40 probe with SMA

extension cable as a function of frequency

Input Impedance

Содержание 1800.5006.02

Страница 1: ...R S RT ZPR20 R S RT ZPR40 Power Rail Probe User Manual User Manual Version 03 1800503502 B0 S2...

Страница 2: ...ohde 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 t...

Страница 3: ...3 Optional Accessories 11 2 3 4 Service Accessories 12 3 Putting into Operation 14 3 1 Connecting the Probe to the Oscilloscope 14 3 2 Identification of the Probe 15 3 3 Offset Compensation and Dynam...

Страница 4: ...RT ZPR40 4 User Manual 1800 5035 02 03 6 Maintenance and Service 28 6 1 Cleaning 28 6 2 Contacting Customer Support 28 6 3 Returning for Servicing 29 6 4 Calibration Interval 30 6 5 Discarding the Pro...

Страница 5: ...caused by dangerous situations Safety information is provided as follows The printed Basic Safety Instructions provide safety information in many lan guages and are delivered with the R S RT ZPR20 40...

Страница 6: ...hstand a higher frequency limit Handle the probe by the probe box Avoid excessive strain on the probe cable and kinking Prevent the probe from receiving mechanical shock Do not spill liquids on the pr...

Страница 7: ...is compatible with this inter face and has the required firmware When connected to the front panel of a sup ported Rohde Schwarz oscilloscope the probe is controlled via the software dialog of the osc...

Страница 8: ...ng material until the contents have been checked for completeness and the device has been tested If the packaging material shows any signs of stress notify the carrier and your Rohde Schwarz service c...

Страница 9: ...red supply voltage and is also used for simultaneously transmitting analog signals and digital data All the analog voltages required by the probe are generated in the probe box This approach ensures y...

Страница 10: ...40 power rail probe Table 2 1 Supplied accessories Item Quantity Description 1 R S RT ZA25 power rail browser kit includes Power rail browser Ground lead with alligator clip Ground spring 5 IC cap 5 T...

Страница 11: ...rent accessory sets for sale The order numbers are provided in the data sheet Table 2 2 Optional accessories Item Description R S RT ZA9 probe box to N USB adapter The adapter connects the R S RT ZPR2...

Страница 12: ...o position and stabilize your probe R S RT ZF20 power deskew fixture The R S RT ZF20 power deskew fixture is a tool to align the time delay skew of any combination of Rohde Schwarz voltage and current...

Страница 13: ...te the probe to do perform ance tests and for servicing The service kit includes all adapters and accessories to connect the probe to the required measuring instruments R S RT ZPR20 40 Service Man ual...

Страница 14: ...avior and not a sign of malfunction 3 1 Connecting the Probe to the Oscilloscope Connecting 1 If the extension cable is connected to the probe box disconnect it To avoid damage to the device connect t...

Страница 15: ...be box before changing a probing point or before disconnecting the probe box from the oscilloscope 2 To disconnect the probe a Press and hold the release button 3 b Pull the probe box away from the os...

Страница 16: ...maximum voltage swing that may occur between the input terminal and ground The dynamic range of the R S RT ZPR20 40 is 0 850 V If this range is excee ded an unwanted signal clipping may occur The R S...

Страница 17: ...40 power rail probe features an internal AC coupling mode with a low frequency cutoff at 10 Hz to block DC components of the input signal The AC coupling is set inside the probe the full bandwidth of...

Страница 18: ...ed on the oscilloscope The R S ProbeMeter state is part of the probe settings of the chan nel to which the probe is connected For details refer to the user manual of the Rohde Schwarz oscilloscope Adv...

Страница 19: ...e solder in accessories are very fine and sensitive Stabilize the probe using appropriate means e g adhesive pads probe positioner in order to protect the solder joint from excessive mechanical stress...

Страница 20: ...To avoid damaging the browser parts use them carefully Do not apply a side load to the browser Do not apply too much force when browsing The weight of the probe in your hand is sufficient Always remo...

Страница 21: ...larger loop inductance bandwidth is decreased Use the dual adapter to plug onto pin strips or to connect the micro SMD clip Use the micro SMD clip to connect surface mount devices e g 0805 0402 capac...

Страница 22: ...T ZPR20 3 5 GHz R S RT ZPR40 Length 15 cm 1 15 m with SMA extension cable Temperature range 55 C to 125 C Do not connect the R S RT ZA26 pigtail cable directly to the probe box Connect the R S RT ZA26...

Страница 23: ...ction that supports the full bandwidth of the probe The SMA extension cable is well suited for connections to existing SMA m ports at your test circuit Due to the design of the coaxial interface groun...

Страница 24: ...red form A good probe causes only minimum alterations How the probe can fulfill this require ment is mainly determined by its bandwidth Low loading of the input signal Every probe is a load for the si...

Страница 25: ...the input volt age of the probe RS Source impedance of the DUT Rin DC input resistance of the probe RRF RF input resistance Cin Coupling capacitance Lcon Parasitic inductance of the ground connection...

Страница 26: ...put impedance 1 Ohm A DUT with an output impedance RS higher than 1 Ohm leads to a mismatch between DC gain and AC gain The mismatch causes a step at 1 MHz and thus non flat frequency response In the...

Страница 27: ...caused by the probe is determined by its input impe dance Zin Figure 5 1 illustrates an equivalent circuit model The resulting input impedance versus frequency is indicated in Figure 5 4 Figure 5 4 Ex...

Страница 28: ...lvents thinners acetone acids and bases can damage the labeling or plastic parts 2 Dry the product completely before using it 6 2 Contacting Customer Support Technical support where and when you need...

Страница 29: ...schwarz com China Phone 86 800 810 8228 86 400 650 5896 customersupport china rohde schwarz com 6 3 Returning for Servicing Use the original packaging to return your R S RT ZPR20 40 to your Rohde Sch...

Страница 30: ...nd the probe to your nearest Rohde Schwarz ser vice center see Chapter 6 3 Returning for Servicing on page 29 6 5 Discarding the Product Handle and dispose the product in accordance with local regulat...

Страница 31: ...ZPR40 1337 9081 00 Spare parts for the R S RT ZA25 power rail browser kit 5 Ground lead with alligator clip 1800 5335 00 6 Dual adapter 1800 5341 00 7 Micro SMD clip 1800 5358 00 8 Flexible ground le...

Страница 32: ...ce and Service R S RT ZPR20 R S RT ZPR40 32 User Manual 1800 5035 02 03 Table 6 2 Parts for ESD prevention Pos Item Material number 1 ESD wrist strap 0008 9959 00 2 ESD grounding cable 1043 4962 00 Sp...

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