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Measurement Principles

R&S

RT-ZS10E/10/20/30

User Manual 1410.3531.02 ─ 07

able 4-2: Connection inductance L

con

and resulting bandwidth with dif

ferent types of connection

Type of connection

Connection

Connection inductance

con

Resulting band-

width

Rise time

Signal socket

Ground socket

Signal

Ground

~4 nH

T-ZS10: 1.0 GHz

T-ZS20: 1.5 GHz

T-ZS30: 3.0 GHz

T-ZS10: < 350 ps

T-ZS20: < 250 ps

T-ZS30: < 135 ps

Signal

Ground

lead

~20 nH

T-ZS10: 1.0 GHz

T-ZS20: 1.2 GHz

T-ZS30: 1.3 GHz

T-ZS10: < 400 ps

T-ZS20: < 300 ps

T-ZS30: < 270 ps

Clip / Lead

Ground

lead

~60 nH

700 MHz

> 1 ns

Signal Integrity of the Transferred Signal

Содержание RT-ZS10

Страница 1: ...R S RT ZS10E 10 20 30 Active Voltage Probe User Manual User Manual Version 07 1410353102 SO2 ...

Страница 2: ... 49 89 41 29 0 Fax 49 89 41 29 12 164 Email 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 1410 3531 02 Version 07 R S RT ZS10E 10 20 30 Throughout this manual products from Rohde Schwarz are indicated without the symbol e g R S RT...

Страница 3: ... product documentation in a safe place and pass them on to the subsequent users Riesgo de lesiones y daños en el instrumento El instrumento se debe usar de manera adecuada para prevenir descargas eléctricas incendios lesiones o daños materiales No abrir la carcasa del instrumento Lea y cumpla las Instrucciones de seguridad elementales suministradas con el instrumento como folleto impreso Lea y cum...

Страница 4: ...upplied with the active voltage probe Risk of electric shock Do not connect an active voltage probe 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 caus...

Страница 5: ...ge of electronic components the operational site must be protected against electrostatic discharge ESD Wrist strap with cord Ground connection of operational site Heel strap Floor mat The following two methods of ESD protection may be used together or separately Wrist strap with cord to ground connection Conductive floor mat and heel strap combination ...

Страница 6: ...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...

Страница 7: ...n of the Probe 8 1 3 1 Probe Head 8 1 3 2 Probe Box 9 1 4 Accessories and Items 10 1 4 1 Accessories Supplied 10 1 4 2 Optional Accessories 12 1 4 3 Service Accessories 13 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 17 2 3 1 Zero Adjustment 17 2 3 2 Micro Button 18 2 3 3 Offset Compensation 18 2 3 4 R S ProbeMet...

Страница 8: ...4 1 2 Connection Inductance 29 4 2 Signal Loading of the Input Signal 32 4 2 1 Input Impedance 32 4 3 Probing Philosophy 35 5 Maintenance and Service 37 5 1 Service Strategy 37 5 2 Returning for Servicing 37 5 3 Cleaning 38 5 4 Calibration Interval 38 5 5 Discarding the Product 38 5 6 Spare Parts 38 6 Functional Check 41 Index 42 ...

Страница 9: ...atures such as the R S ProbeMeter and the micro button the R S RT ZS10 20 30 is designed to meet tomorrow s challenges in probing Since the probe is equipped with Rohde Schwarz probe interface it can be connected to any Rohde Schwarz base unit that is compatible with this inter face When connected to the front panel of an R S oscilloscope the probe is controlled via the software menus of the oscil...

Страница 10: ...e base unit For details see Chapter 2 3 2 Micro Button on page 18 R S ProbeMeter The R S ProbeMeter measures the DC voltage of the input signal directly at the probe tip It provides a continuous high precision DC voltage measurement that is independent of the settings of the oscilloscope and runs in parallel to the time domain measurement If activated on the base unit the measured value is dis pla...

Страница 11: ...e R S RT ZS10E is ideally suited for customers who value the high signal fidelity of Rohde Schwarz probes and who do not need a large set of accesso ries and additional functions In the following the R S RT ZS10E and the R S RT ZS10 are equivalent with the following exceptions The R S RT ZS10E does not come with a carrying case or its contents The R S RT ZS10E does not offer the offset compensatio...

Страница 12: ...rate properly notify your Rohde Schwarz service center 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 1 3 Description of the Probe The probe consists of the probe head for connection to the DUT the probe box for connection to the oscilloscope...

Страница 13: ...ope 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 All the analog voltages required by the probe are gen erated in the probe box This approach ensures that it will b...

Страница 14: ...s that are available for the R S RT ZS10 20 30 active voltage probe Figure 1 1 Available accessories 1 4 1 Accessories Supplied The following table shows the accessories supplied with the R S RT ZS10 20 30 active voltage probe Table 1 1 Accessories supplied Item Quantity Description ZS10 20 30 ZS10E 10 5 Signal pin Accessories and Items ...

Страница 15: ...0 20 30 11 User Manual 1410 3531 02 07 Item Quantity Description 5 2 Ground pin pogo 10 2 Ground pin solderable offset 2 Ground adapter square pin 2 Lead 6 cm 2 4 in 2 1 Lead 15 cm 5 9 in 2 1 Mini clip 2 Micro clip Accessories and Items ...

Страница 16: ...e Schwarz offers different accessory sets for sale The order numbers are provided in the data sheet Table 1 2 R S RT ZA2 spare accessory set Item Quantity Description Signal pin Ground pin pogo Ground pin solderable offset Ground adapter square pin Marker band kit Mini clip Micro clip Lead 6 cm 2 4 in Lead 15 cm 5 9 in Accessory box and vials Carrying case with foam inlay R S RT ZS10 20 30 User Ma...

Страница 17: ... 4 Contains micro clips Table 1 6 R S RT ZA6 lead set Item Quantity Description Lead 6 cm 2 4 in Lead 15 cm 5 9 in 5 5 Contains short and long leads Table 1 7 R S RT ZA9 probe box to N USB adapter The adapter can be used to connect the R S RT ZS10 20 30 active voltage probe to any other oscilloscope or any other measurement instru ment e g a network or spectrum analyzer Using the USB interface of ...

Страница 18: ...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 ZS10 20 30 Service Manual The service manual contains a detailed description of the performance test to verify the specifications and other important service procedures Accessories and Items ...

Страница 19: ...ed for higher frequencies Refer to the data sheet for further information Risk of device damage The R S RT ZS10 20 30 can withstand a moderate amount of physical and electrical stress To avoid damage treat the probe with care Do not exceed the specified voltage limits Connect the R S RT ZS10 20 30 only to an instrument with Rohde Schwarz probe interface Never connect it to a usual BNC jack Althoug...

Страница 20: ...n you connect or disconnect a DUT or test fixture to the probe and to the instrument s test ports To pre vent electrostatic discharge use a wrist strap and cord and connect your self to the ground or use a conductive floor mat and heel strap combina tion Discharge cables and probe tips before you connect them 2 1 Connecting the Probe to the Oscilloscope Connect the probe box 1 to the Rohde Schwarz...

Страница 21: ...e 2 3 Using the Probe 2 3 1 Zero Adjustment The zero error can impair the measurement results therefore correct the zero error if necessary The zero error of the probe itself is very small However differ ences in DUT and oscilloscope ground levels can cause larger zero errors visible on the oscilloscope s screen If the DUT is not floating but ground referenced an zero adjustment improves the measu...

Страница 22: ...the micro button remotely controls this specific function on the base unit For exam ple Continuous Run or Single are often assigned to the micro button The configuration of the micro button is part of the probe settings of the channel to which the probe is connected For more details see the oscilloscope s user manual 2 3 3 Offset Compensation The offset compensation function can compensate a DC co...

Страница 23: ...signals with different DC offsets assign Set offset to mean to the micro button See also Chapter 2 3 2 Micro But ton on page 18 For more details see the oscilloscope s user manual 2 3 4 R S ProbeMeter The R S ProbeMeter is an integrated voltmeter that measures DC voltages with higher precision compared to the oscilloscope s DC accuracy The DC measure ment is performed continuously and in parallel ...

Страница 24: ...of displayed waveform 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 Independent of probe settings for measurement mode and gain Measurement range 8 V offset compensation setting M...

Страница 25: ... long connections cannot be avoided they have to be preferably used for the ground socket Risk of injuries The included probe pins are exceptionally sharp and must be handled with extreme care To prevent injuries always use tweezers when inserting or removing pins Pins Signal pin The signal pin is held to the DUT to tap off the measurement signal It fits into the signal socket and is designed for ...

Страница 26: ...The distance to the signal pin can be varied by turning the ground pin Distance range 0 mm to 10 mm 0 mil to 400 mil Ground pin solderable offset The rigid ground pin is soldered to a test point on the DUT and provides a reliable and per manent connection to the DUT To protect the solder joint from excessive mechanical stress stabilize the soldered probe for example with adhesive tape or probe pos...

Страница 27: ...4 mm 100 mil The adapter is plugged onto the ground and signal socket of the probe Distance 2 54 mm 100 mil Leads 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 socket or the ground socket In addition it allows micro and mini clips to be connected to the probe Length Short lead 6 mm 236 mil Lon...

Страница 28: ...rge IC pins wires and through hole components For probing clamp the mini clip to a pin and connect it to the signal socket or the ground socket using a lead 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 ...

Страница 29: ... only minimum alterations How the probe can fulfill this requirement is mainly determined by its band width Low loading of the input signal Every probe is a load for the signal to be measured The signal to be mea sured changes when the probe is connected A good probe causes only a minimum change to the signal so that the function of the DUT is not adversely affected How the probe can fulfill this ...

Страница 30: ... resistance of the DUT RL Load resistance of the DUT Rin DC input resistance Cin Input capacitance of the probe RRF RF input resistance of the probe Lcon Parasitic inductance of the ground connection In a 50 Ω system the output resistance of the source the load resistance and the characteristic impedance of all lines equal exactly 50 Ω However the behavior of the probe in the circuit is determined...

Страница 31: ...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 Figure 4 2 Amplitude frequency response of the R S RT ZS10 20 30 The bandwidth Specifies the maximum frequency at which a purely sinusoidal signal is still transferred at 70 3 dB of its amplitude Specifies the transferable spectrum for other wavefor...

Страница 32: ... amplitude frequency response of the probe is decisive for high signal integrity The Figure 4 2 shows the typical amplitude frequency response of an R S RT ZS10 20 30 active voltage probe All fre quency components are transferred with the same gain so that the input signal is displayed without distortion The Figure 4 3 shows a typical step response of an R S RT ZS10 20 30 active voltage probe Figu...

Страница 33: ...Reduces the usable bandwidth and causes ringing with signals having a short rise time due to a series resonance with the input capacitance Must be as small as possible short lead length to maintain high signal integ rity Long leads on the signal input are especially problematic con in con resonance con L BW C L f A L 1 to al proportion 2 1 to al proportion Figure 4 4 Ground connection and connecti...

Страница 34: ...ction inductance L con Resulting band width Rise time Signal socket Ground socket 1 Signal pin Ground pin 4 nH RT ZS10 1 0 GHz RT ZS20 1 5 GHz RT ZS30 3 0 GHz RT ZS10 350 ps RT ZS20 250 ps RT ZS30 135 ps 2 Signal pin Ground lead 20 nH RT ZS10 1 0 GHz RT ZS20 1 2 GHz RT ZS30 1 3 GHz RT ZS10 400 ps RT ZS20 300 ps RT ZS30 270 ps 3 Clip Lead Ground lead 60 nH 700 MHz 1 ns Signal Integrity of the Trans...

Страница 35: ...in ps Vs Vout solderable pin Vout pogo pin Figure 4 5 Step response of the R S RT ZS30 with a type 1 connection 0 50 100 150 200 250 300 350 0 100 200 300 400 500 600 700 800 900 1000 Input Output voltage in mV Time in ps Vs Vout ground lead 15 cm Vout ground lead 6 cm Figure 4 6 Step response of the R S RT ZS30 with a type 2 connection Signal Integrity of the Transferred Signal ...

Страница 36: ... of the Input Signal The previous section dealt with the transfer function and step response of the probe This section describes how the probe influences the input signal 4 2 1 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 resist...

Страница 37: ...ng of a step signal at the input of the probe is given in Fig ure 4 9 The connection inductance Lcon has only a minor effect on the signal loading and is therefore not considered in the following 10 100 1 k 10 k 100 k 1 Meg 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz 100 MHz 1 GHz Impedance in Ohm Frequency in C 1 in R RF R Figure 4 8 Magnitude of the input impedance of the R S RT ZS10 20 30 probe as a func...

Страница 38: ...encies 100 kHz A low input resistance can potentially disturb measure ments of high frequency signals as it influences the DC operating point of active components This effect is negligible for most applications involving the R S RT ZS10 20 30 probe due to the high input resistance of the probe 1 MΩ 4 2 1 2 Input Capacitance The input capacitance Cin causes the input impedance to decrease in the me...

Страница 39: ...inions which signal is the better output of the probe The initial signal that is not loaded by the probe VS and that corresponds to the signal at the test point without the probe being connected The input signal that is loaded with the input impedance of the probe Vin and that is present between the probe tips Both approaches are physically correct and have their individual advantages and disadvan...

Страница 40: ...Measurement Principles R S RT ZS10E 10 20 30 36 User Manual 1410 3531 02 07 Figure 4 10 Unloaded and loaded input signal and step response for RT ZS30 Probing Philosophy ...

Страница 41: ...oltage probe for calibration The service personnel carry out the required tests 5 2 Returning for Servicing Use the original packaging to return your R S RT ZS10 20 30 to your Rohde Schwarz service center A list of all service centers is available on www services rohde schwarz com If you cannot use the original packaging consider the following 1 Use a sufficiently sized box 2 Protect the product f...

Страница 42: ...ned with either distilled water or isopropyl alcohol Before using the product again make sure to dry it completely 5 4 Calibration Interval The recommended calibration interval for R S RT ZS10 20 30 active voltage probe is two years For servicing send the probe to your nearest Rohde Schwarz service center see Chapter 5 2 Returning for Servicing on page 37 5 5 Discarding the Product Handle and disp...

Страница 43: ...ription Material number 1 Signal pin 1416 0005 00 2 Ground pin pogo 1416 0034 00 3 Ground pin solderable off set 1416 0040 00 4 Ground adapter square pin 1416 0063 00 5 Lead 6 cm 2 4 in 1416 0128 00 6 Lead 15 cm 5 9 in 1416 0134 00 7 Mini clip 1416 0105 00 8 Micro clip 1416 0111 00 9 Marker band kit 1416 0205 00 Spare Parts ...

Страница 44: ...7 Pos Item Description Material number 10 Pogo pin Pogo pin connector 6 pins 3584 6396 00 11 R S RT ZK1 R S RT ZK1 service kit 1410 5157 02 Table 5 2 Parts for ESD prevention Pos Item Material number 1 ESD wrist strap 0008 9959 00 2 ESD grounding cable 1043 4962 00 Spare Parts ...

Страница 45: ...e specifications 1 Connect the R S RT ZS10 20 30 probe to a Rohde Schwarz oscilloscope as described in Chapter 2 1 Connecting the Probe to the Oscilloscope on page 16 2 Connect the signal pin to the square wave output of the oscilloscope 3 Connect the ground pin to the probe ground connector of the oscilloscope 4 Press the Preset key and then the Autoset key on the oscilloscope A square wave with ...

Страница 46: ...r square pin 23 Ground pin pogo 22 Ground pin solderable offset 22 I Inductance 29 Input capacitance 6 34 Input impedance 32 Input resistance 6 34 L Leads 13 23 M Micro button 6 18 Micro clip 24 Mini clip 24 N N USB adapter 13 O Offset compensation 18 P Pins Inserting and removing 21 Usage 21 Probe box 9 Probe head 8 Probe identification 17 ProbeMeter 6 19 Probing principles 25 Product description...

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