®
R&S
R
T‑ZD10/20/30
Active Differential Probe
®
R&S
RT‑ZA15
External Attenuator
User Manual
(>:]À2)
1410455002
Version 05
User Manual
This user manual describes the following R&S®R
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)
T-ZD models and external
© 2019 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr
Phone: +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.
1410.4550.02 | 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.
. 15, 81671 München, Germany
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
Contents
2.3 Using the Probe.................................................................................. 17
2.4 Offset Compensation..........................................................................18
3 R&S RT‑ZA15 External Attenuator..................................... 23
3.1 Key Characteristics............................................................................ 23
3.2 Description.......................................................................................... 24
3.3 Inserting the Probe............................................................................. 24
3.4 Adjusting............................................................................................. 25
4 Connecting the Probe to the DUT...................................... 30
5 Characteristics of Differential Probes............................... 36
5.1 Common Mode Rejection Ratio (CMRR)...........................................37
5.2 Dynamic Range and Operating Voltage Window............................. 38
5.3 Ground Connection............................................................................ 39
6 Measurement Principles..................................................... 40
6.1 Signal Integrity of the Transferred Signal.........................................42
6.2 Signal Loading of the Input Signal....................................................46
6.3 Probing Philosophy............................................................................ 49
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R&S®RT‑ZD10/20/30
Contents
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
4User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
Key Features and Key Characteristics
Product Description
1 Product Description
1.1 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.
Differential probes can be used for single-ended and differential applications.
They are equipped with two high-impedance inputs and can measure the voltage
between any two test points. Unlike using single-ended probes, there is no need
to ensure that one of the test points is always at ground potential.
The comprehensive accessory set allows this probe to be connected to a wide
variety of devices under test (DUT). Provided with special features such as the
R&S ProbeMeter and the micro button, the R&S RT‑ZD10/20/30 is designed to
meet tomorrow's challenges in probing.
The external attenuator R&S RT‑ZA15 can be used to extend the input voltage
range of the R&S RT‑ZD10/20/30. It is supplied with the R&S RT‑ZD10 and is
available as optional accessory for the R&S RT‑ZD20/30.
The probe is equipped with theRohde & Schwarz probe interface. It can be connected to any Rohde & Schwarz instrument that is compatible with this interface.
When connected to the front panel, the probe is controlled by the oscilloscope's
software. Supported oscilloscopes are listed in the data sheet.
Using a specially developed adapter (see Chapter 1.4.2, "Optional Accessories",
on page 13), the probe can also be connected to any other base unit.
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R&S®RT‑ZD10/20/30
Key Features and Key Characteristics
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 R
DC to 3.0 GHz (R&S RT-ZD30)
T-ZD20)
Product Description
Dynamic range
(differential input)
Operating voltage window
(each pin to GND)
Maximum non-destructive input voltage ±30 V
Diff. input resistance 1 MΩ
Diff. input capacitance 0.6 pF
R&S ProbeMeter, measurement error <0.1 %
Extremely low zero and gain errors throughout the entire temperature range, no significant temperature drift
Micro button
Rohde & Schwarz probe interface
±5 V with ±5 V offset capability
10 V AC (Vpp)
±8 V with ±22 V common mode offset capability
Available for R&S RT‑ZD10/20/30 probes with serial
number ≥ 200000
Between each signal pin and ground
1.1.2 Key Features
Micro button
The micro button at the probe head can remotely control dif
ferent functions on the
base unit. The assigned function is configured via the 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 displayed on the screen of the Rohde & Schwarz oscilloscope.
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R&S®RT‑ZD10/20/30
Product Description
Unpacking
The R&S ProbeMeter simultaneously measures both differential and common
mode DC voltages.
For details, see Chapter 2.4.3, "R&S ProbeMeter", on page 21.
Data memory
The probe has an integrated data memory
, containing the individual probe correc-
tion parameters (e.g. gain, delay, offset). These parameters are read out and processed by the Rohde & Schwarz oscilloscope. As a result, the probe offers a high
degree of accuracy, and additional calibration procedures are not required.
1.2 Unpacking
The carrying case contains the following items:
●
R&S R
●
Carrying case
●
Accessory boxes
●
User manual
●
R&S RT‑ZD10/20/30 data sheet
●
Calibration certificate
●
Documentation of calibration values (if
ordered)
●
R&S RT-ZA15 external attenuator (only
with R&S RT-ZD10)
T‑ZD10/20/30 differential probe
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.
If the packaging material shows any signs of stress, notify the carrier and your
Rohde & Schwarz service center
for inspection.
●
Inspect 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.
. Keep the package and cushioning material
7User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
Product Description
Description of the Probe
●
Inspect the accessories.
If the contents are incomplete or damaged, notify your Rohde & Schwarz service 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, and the probe cable.
1.3.1 Probe Head
The small and lightweight probe head is designed for easy handling and high-performance measurements. The probe head is used for connecting the probe and
the DUT
. Different accessories for the signal and ground sockets allow the probe
head to be connected to a wide range of DUTs.
(1) Positive signal socket
(2) Negative signal socket
(3) Ground socket
(4) Micro button
The accessories supplied for the probe head
sockets are listed in Chapter 1.4.1, "Accesso-
ries Supplied", on page 10
Signal and ground 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.
Spacing of signal sockets: 5.08 mm (200 mil).
.
8User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
Product Description
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 provides the required supply voltage and is also used to transmit analog signals and
digital data simultaneously
erated in the probe box. This approach ensures that it will be possible to operate
future probes on any base unit that features a Rohde & Schwarz probe interface.
. All the analog voltages required by the probe are gen-
(1) Rohde & Schwarz probe interface with
7 mm (276 mil) coaxial connector and 6 pogo
pins
(2) Release knob
Connect the R&S R
T‑ZD10/20/30 only to an instrument with Rohde & Schwarz
probe interface. Never connect it to a usual BNC jack. Although the 7 mm coaxial
connector looks like a standard BNC connector, it is constructed differently and
does not fit to the standard BNC jack. The interface of the R&S RT‑ZD10/20/30
can withstand a higher frequency limit.
1.4 Accessories and Items
The figure below shows all accessories that are available for the
R&S RT‑ZD10/20/30 differential probe.
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R&S®RT‑ZD10/20/30
Product Description
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 R
differential probe.
T‑ZD10/20/30
10User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
Table 1-1: Accessories supplied
Item Quantity Description
Product Description
Accessories and Items
10 Signal pin, solder-in
4 Signal pin, variable spacing
1 Browser adapter
2 Adapter, square pin
1
1
1
1
2 Lead, 6 cm / 2.4 in
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
11User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
Item Quantity Description
Product Description
Accessories and Items
1 Lead, 15 cm / 5.9 in
2 Mini clip
2 Micro clip
1 Marker band kit
1
(only with R&S R
(only with R&S RT‑ZD10)
T‑ZD10)
1
1
External attenuator
Adjustment tool
Carrying case with foam
inlay
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R&S®RT‑ZD10/20/30
Product Description
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.
RT‑
Table 1-2: R&S
Item Quantity Description
Mini clip 10 Contains mini clips.
Table 1-3: R&S RT‑ZA5 micro clips
Item Quantity Description
Micro clip 4 Contains micro clips.
ZA4 mini clips
RT‑
Table 1-4: R&S
Item Quantity Description
Lead, 6 cm / 2.4 in
Lead, 15 cm / 5.9 in
Table 1-5: R&S
Item Quantity Description
Signal pin, solder-in
Signal pin, variable spacing
Browser adapter
Browser adapter, rigid / pogo
Adapter, square pin
Table 1-6: R&S
ZA6 lead set
RT‑
ZA7 differential pin set
, pogo / pogo
RT‑
ZA9 probe box to N / USB adapter
The adapter can be used to connect the
R&S R
oscilloscope or any other measurement instrument
(e.g. a network or spectrum analyzer).
Using the USB interface of the adapter, the probe
can be powered and controlled from any conventional PC.
5
5
20
10
1
1
2
T‑ZD10/20/30 differential probe to any other
Contains short and long leads.
Contains the pins available for
the R&S RT‑ZD10/20/30.
13User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
RT‑
Table 1-7: R&S
ZA15 external attenuator (optional for R&S RT‑ZD20/30)
1.4.3 Service Accessories
Product Description
Accessories and Items
1 External attenuator
1 Adjustment tool
To order accessories for servicing the probe, contact your Rohde & Schwarz service center
Table 1-8: Service accessories
Item Description
R&S RT-ZK2 The service kit is used to calibrate the probe, to do perform-
R&S R
Manual
. The following accessories are available:
ance tests, and for servicing. The service kit includes all
adapters and accessories to connect the probe to the
required measuring instruments.
T‑ZD10/20/30 Service
The service manual contains a detailed description of the
performance test to verify the specifications, and other
important service procedures.
14User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
Putting into Operation
2 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 probe's data sheet.
Read and observe the printed "Basic Safety Instructions" that are delivered with
the probe. Also, read and observe the safety instructions of the oscilloscope the
probe is connected to.
Maximum non-destructive input voltage
The maximum non-destructive input voltage is ±30 V
can destroy the probe. The maximum non-destructive input voltage of a differential probe is specified as the maximum voltage between each signal
pin and ground. The maximum input voltage is derated for higher frequencies. Refer to the data sheet for further information.
Risk of device damage
The R&S RT‑ZD10/20/30 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‑ZD10/20/30 only to an instrument with
Rohde & Schwarz probe interface. Never connect it to a usual BNC
jack. Although the 7 mm coaxial connector looks like a standard BNC
connector, it is constructed differently and does not fit to the standard
BNC jack. The interface of the R&S RT‑ZD10/20/30 can withstand a
higher frequency limit.
. A higher input voltage
●
Handle the probe by the probe head or probe box. Avoid excessive
strain on the probe cable, and kinking.
●
Prevent the probe from receiving mechanical shock.
●
Do not spill liquids on the probe.
●
Store the probe in a shock-resistant case, e.g. in the shipping case.
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R&S®RT‑ZD10/20/30
Putting into Operation
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). Electrostatic discharge is most likely to occur when you connect or disconnect a
DUT or test fixture to the probe and to the instrument's test ports. T
o prevent electrostatic discharge, use a wrist strap and cord and connect yourself to the ground, or use a conductive floor mat and heel strap combination. 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 probe interface of the
oscilloscope (2).
The probe snaps in when connected properly to the port.
Figure 2-1: Connecting the probe to the Rohde
&
Schwarz oscilloscope
16User Manual 1410.4550.02 ─ 05
R&S®RT‑ZD10/20/30
► To disconnect the probe:
a) Press and hold the release button (3).
b) Pull the probe box away from the oscilloscope.
Putting into Operation
Using the Probe
2.2 Identification of the Probe
When the probe is connected to the oscilloscope, the oscilloscope recognizes the
probe and reads out the probe-specific parameters.
The oscilloscope settings for attenuation and of
After the probe is connected to the oscilloscope and the settings are adjusted, the
waveform is shown for the channel to which the probe is connected.
The complete probe information is shown in the probe settings dialog. For more
information, refer to the user manual of your oscilloscope.
fset are automatically adjusted.
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, differences 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 measurement results.
The zero error is corrected at the oscilloscope. Depending on the type of the used
oscilloscope, correction is done automatically using the AutoZero function, or
manually ("Zero Adjust" or similar setting). Refer to the oscilloscope's user manual for available functionality and its usage.
1. Connect the probe to the Rohde & Schwarz oscilloscope.
2. Set the oscilloscope to the smallest vertical scale.
3. Short the signal pins and the ground pin together.
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R&S®RT‑ZD10/20/30
4. Adjust the zero position of the waveform using the appropriate function of the
oscilloscope (
The waveform is set to 0 V on the horizontal centerline of the oscilloscope.
"AutoZero", "Zero Adjust" or similar).
Putting into Operation
Offset Compensation
2.3.2 Micro Button
The micro button provides easy and quick access to important functions of the
Rohde & Schwarz oscilloscope. After a function has been assigned, pressing the
micro button remotely controls this specific function on the base unit. For example, "Run continuous" or "Run 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.
2.4 Offset Compensation
The R&S RT‑ZD10/20/30 features two offset compensation functions: a differential offset compensation and a common mode offset compensation. Each function
compensates a particular DC component of the input signal, even in front of the
active amplifier in the probe tip. For a definition of differential and common mode
input voltages, see Chapter 5, "Characteristics of Differential Probes",
on page 36.
18User Manual 1410.4550.02 ─ 05
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