B.5Reset values of the status reporting system..........................................................827
List of commands.............................................................................. 828
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Contents
16User Manual 1335.9090.02 ─ 10
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1Safety and regulatory information
Safety and regulatory information
Safety instructions
The product documentation helps you to use the product safely and efficiently. Follow
the instructions provided here and in the Chapter 1.1, "Safety instructions",
on page 17.
Intended use
The R&S RTM3000 oscilloscope is designed for measurements on circuits that are
only indirectly connected to the mains or not connected at all. It is not rated for any
measurement category.
The product is intended for the development, production and verification of electronic
components and devices in industrial, administrative, and laboratory environments.
Use the product only for its designated purpose. Observe the operating conditions and
performance limits stated in the data sheet.
Where do I find safety information?
Safety information is part of the product documentation. It warns you of potential dangers and gives instructions on how to prevent personal injury or damage caused by
dangerous situations. Safety information is provided as follows:
●
In Chapter 1.1, "Safety instructions", on page 17. The same information is provided in many languages as printed "Safety Instructions". The printed "Safety
Instructions" are delivered with the product.
●
Throughout the documentation, safety instructions are provided when you need to
take care during setup or operation.
1.1Safety instructions
Products from the Rohde & Schwarz group of companies are manufactured according
to the highest technical standards. To use the products safely, follow the instructions
provided here and in the product documentation. Keep the product documentation
nearby and offer it to other users.
Use the product only for its intended use and within its performance limits. Intended
use and limits are described in the product documentation such as the data sheet,
manuals and the printed "Safety Instructions". If you are unsure about the appropriate
use, contact Rohde & Schwarz customer service.
Using the product requires specialists or specially trained personnel. These users also
need sound knowledge of at least one of the languages in which the user interfaces
and the product documentation are available.
Never open the casing of the product. Only service personnel authorized by
Rohde & Schwarz are allowed to repair the product. If any part of the product is damaged or broken, stop using the product. Contact Rohde & Schwarz customer service at
http://www.customersupport.rohde-schwarz.com.
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Safety and regulatory information
Safety instructions
In these safety instructions, the term "product" covers instruments (oscilloscopes),
probes and their accessories.
Lifting and carrying the instrument
Check the data sheet for the maximum weight of the instrument. A single person can
only carry a maximum of 18 kg safely depending on age, gender and physical condition. If your instrument is heavier than 18 kg, do not move or carry it by yourself.
Use the instrument handles to move or carry the instrument. Do not use the mounted
accessories instead of the handles. Accessories are not designed to carry the weight
of the instrument.
To move the instrument safely, you can use lifting or transporting equipment such as lift
trucks and forklifts. Follow the instructions provided by the equipment manufacturer.
Choosing the operating site
Only use the product indoors. The product casing is not waterproof. Water that enters
can electrically connect the casing with live parts, which can lead to electric shock,
serious personal injury or death if you touch the casing. If Rohde & Schwarz provides
accessories designed for your product, e.g. a carrying bag, you can use the product
outdoors.
You can operate the product up to the altitude specified in the data sheet. The lowest
specified altitude for a product of the measurement setup defines the altitude for the
complete setup.
The product is suitable for pollution degree 2 environments where nonconductive contamination can occur. For more information on environmental conditions such as ambient temperature and humidity, see the data sheet.
Setting up the product
Always place the product on a stable, flat and level surface with the bottom of the product facing down. If the product is designed for different positions, secure the product so
that it cannot fall over.
If the product has foldable feet, always fold the feet completely in or out to ensure stability. The feet can collapse if they are not folded out completely or if the product is
moved without lifting it. The foldable feet are designed to carry the weight of the product, but not an extra load.
If stacking is possible, keep in mind that a stack of products can fall over and cause
injury.
If you mount products in a rack, ensure that the rack has sufficient load capacity and
stability. Observe the specifications of the rack manufacturer. Always install the products from the bottom shelf to the top shelf so that the rack stands securely. Secure the
product so that it cannot fall off the rack.
Connecting to power and grounding
The mains power supply input of the instrument complies with overvoltage category II.
It has to be connected to a fixed installation used to supply energy-consuming equip-
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Safety and regulatory information
Safety instructions
ment such as household appliances and similar loads. Be aware that electrically powered products have risks, such as electric shock, fire, personal injury or even death.
Take the following measures for your safety:
●
Do not use an isolating transformer to connect the instrument to the mains power
supply.
●
Before switching on the product, ensure that the voltage and frequency indicated
on the product match the available power source. If the power adapter does not
adjust automatically, set the correct value and check the rating of the fuse.
●
Only use the power cable delivered with the product. It complies with country-specific safety requirements. Only insert the plug into an outlet with protective conductor terminal.
●
If a product has an exchangeable fuse, its type and characteristics are indicated
next to the fuse holder. Before changing the fuse, switch off the instrument and disconnect it from the power source. How to change the fuse is described in the product documentation.
●
Only use intact cables and route them carefully so that they cannot be damaged.
Check the power cables regularly to ensure that they are undamaged. Also ensure
that nobody can trip over loose cables.
●
If the product needs an external power supply, use the power supply that is delivered with the product or that is recommended in the product documentation or a
power supply that conforms to the country-specific regulations.
●
Ensure that you can disconnect the product from the power source at any time.
Pull the power plug to disconnect the product. The power plug must be easily
accessible. If the product is integrated into a system that does not meet these
requirements, provide an easily accessible circuit breaker at the system level.
Performing measurements
Take the following measures for your safety:
●
To ascertain voltage-free state, use an appropriate voltage tester. Any measurement setup including an oscilloscope is not suitable for this purpose.
●
The maximum input voltage on channel inputs and the external trigger input must
not exceed the value specified in the data sheet.
●
Observe all voltage and current ratings of the instrument, the probes, and the
accessories. Limits and ratings are marked on the products and listed in the data
sheets.
Consider that the rated voltage depends on the frequency. The voltage limitation
curves or values are provided in the data sheet. Do not exceed the maximum measurement voltage from the probe tip to the probe reference lead.
●
Never cause any short circuits when measuring sources with high output currents.
●
Use only probes and accessories that comply with the measurement category
(CAT) of your measurement task. The measurement category of the products is
defined in the data sheet. If you use other than Rohde & Schwarz accessories,
make sure that they are suitable for the instrument and the measurement task.
●
Set the correct attenuation factor on the instrument according to the probe being
used. Otherwise, the measurement results do not reflect the actual voltage level,
and you might misjudge the actual risk.
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Safety and regulatory information
Safety instructions
●
When working with high voltages and current probes, observe the additional operating conditions specified in this safety instructions.
●
The probe pins are extremely pointed and can easily penetrate clothes and the
skin. Handle the probe pins with great care. To exchange a probe pin, use tweezers or pliers to avoid injuries. When transporting the accessories, always use the
box supplied with the probe.
●
Prevent the probe from receiving mechanical shock. Avoid putting excessive strain
on the probe cable or exposing it to sharp bends. Touching a broken cable during
measurements can cause injuries.
●
Set up all probe connections to the instrument before applying power.
Working with hazardous voltages
Voltages higher than 30 V RMS, or 42 V peak, or 60 V DC are regarded as hazardous
contact voltages. Direct contact with them can cause serious injuries.
Make sure that only electrically skilled persons use the products for measurements on
hazardous contact voltages. These working conditions require special education and
experience to perceive risks and to avoid hazards which electricity can create.
When working with hazardous contact voltages, use protective measures to preclude
direct contact with the measurement setup:
●
Do not touch exposed connections and components when power is applied.
●
Switch off the test circuit while connecting and disconnecting probe leads.
●
Use only insulated voltage probes, test leads and adapters.
●
Make sure that the input leads fulfill the safety requirements for your measurement.
The delivered input leads might have a jacket wear indicator that indicates a worn
jacket by different jacket color. In this case, do not use the input lead. Replace it
with a new one.
●
Do not use 4 mm banana plugs without protection against contact.
Working with current probes
When working with current probes, you can measure high-frequency currents or currents that contain high-frequency components.
●
Switch off the test circuit while connecting the probe.
●
Do not attach the clamp to bare unisolated conductors. To avoid injury from a short
circuit, measure at a location on an insulated wire where the insulation is sufficient
for the circuit voltage.
●
Connect the probe only to the secondary side of a breaker. With this measure, you
avoid injury, if a short circuit occurs.
●
The following effects can cause burns and fire or damage to the measurement site:
–Eddy current loss can cause heating of the sensor head.
–Dielectric heating can cause heating of cord insulation and other materials.
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Safety and regulatory information
Safety instructions
Measurement categories
IEC 61010-2-030 defines measurement categories that rate instruments on their ability
to resist short transient overvoltages that occur in addition to the working voltage. Use
the measurement setup only in electrical environments for which they are rated.
●
0 - Instruments without rated measurement category
For measurements performed on circuits not directly connected to mains, for example, electronics, circuits powered by batteries, and specially protected secondary
circuits. This measurement category is also known as CAT I.
●
CAT II:
For measurements performed on circuits directly connected to the low-voltage
installation by a standard socket outlet, for example, household appliances and
portable tools.
●
CAT III:
For measurements performed in the building installation, such as junction boxes,
circuit breakers, distribution boards, and equipment with permanent connection to
the fixed installation.
●
CAT IV:
For measurements performed at the source of the low-voltage installation, such as
electricity meters and primary overcurrent protection devices.
Cleaning the product
Use a dry, lint-free cloth to clean the product. When cleaning, keep in mind that the
casing is not waterproof. Do not use liquid cleaning agents.
Meaning of safety labels
Safety labels on the product warn against potential hazards.
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1.2Labels on the product
Safety and regulatory information
Warning messages in the documentation
Potential hazard
Read the product documentation to avoid personal injury or product damage.
Electrical hazard
Indicates live parts. Risk of electric shock, fire, personal injury or even death.
Protective conductor terminal
Connect this terminal to a grounded external conductor or to protective ground. This protects
you against electric shock should an electric problem occur.
Labels on the casing inform about:
●
Personal safety, see "Meaning of safety labels"on page 21
●
Product and environment safety, see Table 1-1
●
Identification of the product
Table 1-1: Labels regarding product and environment safety
Chassis grounding terminal
Take care when handling electrostatic sensitive devices.
Labeling in line with EN 50419 for disposal of electrical and electronic equipment after the product has come to the end of its service life.
For more information, see "Disposing electrical and electronic equipment"on page 802.
1.3Warning messages in the documentation
A warning message points out a risk or danger that you need to be aware of. The signal word indicates the severity of the safety hazard and how likely it will occur if you do
not follow the safety precautions.
WARNING
Potentially hazardous situation. Could result in death or serious injury if not avoided.
CAUTION
Potentially hazardous situation. Could result in minor or moderate injury if not avoided.
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1.4Where to find key documents on Rohde & Schwarz
Safety and regulatory information
Korea certification class A
NOTICE
Potential risks of damage. Could result in damage to the supported product or to other
property.
Certificates issued to Rohde & Schwarz that are relevant for your country are provided
at www.rohde-schwarz.com/key-documents, e.g. concerning:
●
Quality management
●
Environmental management
●
Information security management
●
Accreditations
1.5Korea certification class A
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바라며, 가정외의 지역에서 사용하는 것을 목적으로 합니다.
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2Preface
2.1Documentation overview
2.1.1Manuals and instrument help
Preface
Documentation overview
This section provides an overview of the R&S RTM3000 user documentation.
You find the manuals on the product page at:
www.rohde-schwarz.com/manual/rtm3000
Getting started manual
Introduces the R&S RTM3000 and describes how to set up the product. A printed English version is included in the delivery.
User manual
Contains the description of all instrument modes and functions. It also provides an
introduction to remote control, a complete description of the remote control commands
with programming examples, and information on maintenance and instrument interfaces. Includes the contents of the getting started manual.
The online version of the user manual provides the complete contents for immediate
display on the internet.
Instrument help
The help offers quick, context-sensitive access to the functional description directly on
the instrument.
Safety instructions
Provides safety information in many languages. The printed document is delivered with
the product.
Instrument security procedures manual
Deals with security issues when working with the R&S RTM3000 in secure areas.
Service manual
Describes the performance test for checking the rated specifications, module replacement and repair, firmware update, troubleshooting and fault elimination, and contains
mechanical drawings and spare part lists. The service manual is available for registered users on the global Rohde & Schwarz information system (GLORIS, https://
gloris.rohde-schwarz.com).
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2.1.2Data sheet and brochure
2.1.3Calibration certificate
2.1.4Release notes and open source acknowledgment
Preface
Conventions used in the documentation
The data sheet contains the technical specifications of the R&S RTM3000. It also lists
the options with their order numbers and optional accessories. The brochure provides
an overview of the instrument and deals with the specific characteristics.
See www.rohde-schwarz.com/brochure-datasheet/rtm3000
The document is available on https://gloris.rohde-schwarz.com/calcert. You need the
device ID of your instrument, which you can find on a label on the rear panel.
The release notes list new features, improvements and known issues of the current
firmware version, and describe the firmware installation. The open source acknowledgment document provides verbatim license texts of the used open source software. It
can also be read directly on the instrument.
See www.rohde-schwarz.com/firmware/rtm3000. The open source acknowledgment
document can also be read directly on the instrument.
2.2Conventions used in the documentation
2.2.1Typographical conventions
The following text markers are used throughout this documentation:
ConventionDescription
"Graphical user interface elements"
[Keys]Key and knob names are enclosed by square brackets.
Filenames, commands,
program code
InputInput to be entered by the user is displayed in italics.
LinksLinks that you can click are displayed in blue font.
All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.
Filenames, commands, coding samples and screen output are distinguished by their font.
"References"References to other parts of the documentation are enclosed by quota-
tion marks.
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2.2.2Conventions for procedure descriptions
2.2.3Notes on screenshots
Preface
Conventions used in the documentation
When operating the instrument, several alternative methods may be available to perform the same task. In this case, the procedure using the touchscreen is described.
Any elements that can be activated by touching can also be clicked using an additionally connected mouse. The alternative procedure using the keys on the instrument or
the on-screen keyboard is only described if it deviates from the standard operating procedures.
The term "select" may refer to any of the described methods, i.e. using a finger on the
touchscreen, a mouse pointer in the display, or a key on the instrument or on a keyboard.
When describing the functions of the product, we use sample screenshots. These
screenshots are meant to illustrate as many as possible of the provided functions and
possible interdependencies between parameters. The shown values may not represent
realistic usage scenarios.
The screenshots usually show a fully equipped product, that is: with all options installed. Thus, some functions shown in the screenshots may not be available in your particular product configuration.
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3Getting started
3.1Preparing for use
3.1.1Lifting and carrying
3.1.2Unpacking and checking
Getting started
Preparing for use
Here, you can find basic information about setting up the instrument for the first time or
when changing the operating site.
See: "Lifting and carrying the instrument"on page 18.
1. Unpack the product carefully.
2. Retain the original packing material. Use it when transporting or shipping the product later.
3. Using the delivery notes, check the equipment for completeness.
4. Check the equipment for damage.
If the delivery is incomplete or equipment is damaged, contact Rohde & Schwarz.
Delivery contents
The delivery package contains the following items:
●
R&SRTM3000 oscilloscope
●
R&S RT-ZP05S probes (2x for R&SRTM3002; 4x for R&SRTM3004)
Specific operating conditions ensure proper operation and avoid damage to the product and connected devices. For information on environmental conditions such as ambient temperature and humidity, see the data sheet.
See also "Choosing the operating site"on page 18.
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3.1.4Setting up the product
Getting started
Preparing for use
Electromagnetic compatibility classes
The electromagnetic compatibility (EMC) class indicates where you can operate the
product. The EMC class of the product is given in the data sheet.
●
Class B equipment is suitable for use in:
–Residential environments
–Environments that are directly connected to a low-voltage supply network that
supplies residential buildings
●
Class A equipment is intended for use in industrial environments. It can cause
radio disturbances in residential environments due to possible conducted and radiated disturbances. It is therefore not suitable for class B environments.
If class A equipment causes radio disturbances, take appropriate measures to
eliminate them.
When setting up the instrument, follow the safety instructions:
●
"Setting up the product"on page 18
●
"Intended use"on page 17
3.1.4.1Placing the product on a bench top
For standalone operation, place the instrument on a horizontal bench with even, flat
surface. The instrument can be used in horizontal position, standing on its feet, or with
the support feet on the bottom extended.
To place the product on a bench top
1. Place the product on a stable, flat and level surface.
CAUTION! The top surface of the product is too small for stacking. If you stack
2.
another product on top of the product, the stack can fall over and cause injury.
If you want to save space, mount several products in a rack.
CAUTION! Foldable feet can collapse. See "Setting up the product"on page 18.
3.
Always fold the feet completely in or out. With folded-out feet, do not place any-
thing on top or underneath.
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3.1.4.2Mounting the product in a rack
Getting started
Preparing for use
NOTICE! Overheating can damage the product.
4.
Prevent overheating as follows:
●Keep a minimum distance of 10 cm between the fan openings of the product
and any object in the vicinity.
●Do not place the product next to heat-generating equipment such as radiators
or other products.
The instrument can be installed in a rack using a rack adapter kit. The order number is
given in the data sheet. The installation instructions are part of the adapter kit.
To prepare the rack
1. Observe the requirements and instructions in "Setting up the product"on page 18.
NOTICE! Insufficient airflow can cause overheating and damage the product.
2.
Design and implement an efficient ventilation concept for the rack.
To mount the R&S RTM3000 in a rack
1. Use an adapter kit that fits the dimensions of the R&S RTM3000 to prepare the
instrument for rack mounting. For information on the dimensions, see data sheet.
a) Order the rack adapter kit designed for the R&S RTM3000. For the order num-
ber, see data sheet.
b) Mount the adapter kit. Follow the assembly instructions provided with the
adapter kit.
2. Push the product onto the shelf until the rack brackets fit closely to the rack.
3. Tighten all screws at the rack brackets with a tightening torque of 1.2 Nm to secure
the product at the rack.
To unmount the product from a rack
1. Loosen the screws at the rack brackets.
2. Remove the product from the rack.
3. If placing the product on a bench top again, unmount the adapter kit from the product. Follow the instructions provided with the adapter kit.
3.1.5Considerations for test setup
Observe safety instructions, see "Performing measurements"on page 19.
Cable selection and electromagnetic interference (EMI)
Electromagnetic interference (EMI) can affect the measurement results.
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Getting started
Preparing for use
To suppress electromagnetic radiation during operation:
●
Use high-quality shielded cables, for example, double-shielded RF and LAN
cables.
●
Always terminate open cable ends.
●
Ensure that connected external devices comply with EMC regulations.
Measuring accessories
Use only probes and measuring accessories that comply with IEC 61010-031.
Signal input and output levels
Information on signal levels is provided in the data sheet. Keep the signal levels within
the specified ranges to avoid damage to the product and connected devices.
Preventing electrostatic discharge (ESD)
Electrostatic discharge is most likely to occur when you connect or disconnect a DUT.
NOTICE! Electrostatic discharge can damage the electronic components of the
►
product and the device under test (DUT).
Ground yourself to prevent electrostatic discharge damage:
a) Use a wrist strap and cord to connect yourself to ground.
b) Use a conductive floor mat and heel strap combination.
During operation, if the firmware observes a serious unexpected disturbance (e.g. due
to ESD), it resets some hardware components and initiates a new alignment to ensure
proper instrument functioning. Then it restores the user settings to the state before the
disturbance.
3.1.6Connecting to power
For safety information, see "Connecting to power and grounding"on page 18.
The R&S RTM3000 can be used with different AC power voltages and adapts itself
automatically to it.
The nominal ranges are:
●
100 V to 240 V AC at 50 Hz to 60 Hz, with maximal 10% voltage fluctuation on line
●
1.6 A to 0.7 A
●
max. 160 W
1. Plug the AC power cable into the AC power connector on the rear panel of the
product. Only use the AC power cable delivered with the product.
2. Plug the AC power cable into a power outlet with ground contact.
The required ratings are listed next to the AC power connector and in the data
sheet.
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3.2Instrument tour
3.2.1Front view
Getting started
Instrument tour
Figure 3-1 shows the front panel of the R&S RTM3000. The function keys are grouped
in functional blocks to the right of the display.
Figure 3-1: Front panel of R&S RTM3000 with 4 input channels
1 = Display
2 = Horizontal and vertical setup controls
3 = Trigger settings, action and analysis controls
4 = Analog input channels (BNC)
5 = External trigger input
6 = Connectors for demo signal output
7 = Connector for optional function generator output (BNC, R&S RTM-B6)
8 = Connectors for optional pattern generator (R&S RTM-B6)
9 = Connectors for probe compensation
10 = USB connector
11 = [Standby] key
The R&S RTM3002 has 2 input channels, and the R&S RTM3004 has 4 input channels.
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3.2.1.1Input connectors
Getting started
Instrument tour
BNC inputs (4 and 5)
The R&S RTM3000 has two or four channel inputs (4) to connect the input signals. The
external trigger input (5) is used to control the measurement by an external signal. The
trigger level can be set from -5 V to 5 V.
For channel connectors, the input impedance is selectable, the values are 50 Ω and
1 MΩ.
The maximum input voltage is 400 V (peak), 300 V (RMS) at 1 MΩ input impedance
and 30 V (peak), 5 V (RMS) at 50 Ω input impedance.
For the external trigger input, the maximum input voltage is 400 V (peak) and
300 V (RMS) at 1 MΩ input impedance.
Transient overvoltages must not exceed 400 V (peak).
3.2.1.2Other connectors on the front panel
[Demo] (6)
The pins are intended for demonstration purposes.
[Gen]: Function Generator (7)
BNC output of the function generator (with option R&S RTM-B6).
[Pattern Generator] (8)
Connectors for the pattern generator P0, P1, P2, P3.
[Probe Comp.] (9)
Probe compensation terminal to support adjustment of passive probes to the oscilloscope channel.
Square wave signal for probe compensation.
Ground connector for probes.
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3.2.2Side view
Getting started
Instrument tour
[USB] type A (10)
USB 2.0 type A interface to connect a mouse or a keyboard, or a USB flash drive for
storing and reloading instrument settings and measurement data, and to update the
firmware.
Figure 3-2: Side view of R&S RTM3000
1 = Connectors for logic probe (Mixed Signal Option R&S RTM-B1)
Logic probe
The connectors for logic channels can be used if the Mixed Signal Option R&S RTMB1 is installed. The option provides connectors for two logical probes with 8 digital
channels each (D0 to D7 and D8 to D15).
The maximum input voltage is 40 V (peak) at 100 kΩ input impedance. The maximum
input frequency for a signal with the minimum input voltage swing and medium hysteresis of 800 mV (Vpp) is 400 MHz.
3.2.3Rear view
Figure 3-3 shows the rear panel of the R&S RTM3000 with its connectors.
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Getting started
Instrument tour
Figure 3-3: Rear panel view of R&S RTM3000
1 = Aux Out connector
2 = USB connector, type B
3 = LAN connector
4 = AC power supply connector and main power switch
5 = Kensington lock slot to secure the instrument against theft
6 = Loop for lock to secure the instrument against theft
7 = not used
[Aux Out] (1)
Multi-purpose BNC output that can function as pass/fail and trigger output, and output
of 10 MHz reference frequency.
[USB] type B (2)
USB 2.0 interface of type B (device USB) for remote control of the instrument.
[LAN] (3)
8-pin connector RJ-45 used to connect the instrument to a Local Area Network (LAN).
It supports up to 1 Gbit/s.
AC supply: mains connector and main power switch (4)
The instrument supports a wide range power supply. It automatically adjusts to the correct range for the applied voltage. There is no line voltage selector.
The AC main power switch disconnects the instrument from the AC power line.
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4Operating basics
4.1Display overview
Operating basics
Display overview
The touchscreen display of the instrument shows the waveforms and measurement
results, and also information and everything that you need to control the instrument.
Figure 4-1: Display of the R&S RTM3000 with 4 channels
1 = Toolbar
2 = Trigger source, main trigger parameter (here: slope for edge trigger), trigger level
3 = Trigger mode and sample rate
4 = Horizontal scale (time scale) and horizontal position
5 = Acquisition status and acquisition mode
6 = Date, time, education mode if active (here: off), LAN connection status (green = connected, grey = not
connected, yellow = connecting)
7 = Trigger level marker, has the color of the trigger source
8 = Trigger position marker, has the color of the trigger source
9 = Channel markers indicate the ground levels; channel C2S is selected, i.e. it has the focus
10 = Measurement results (here: automatic measurements on the left, cursor measurements on the right)
11 = Vertical settings of active analog channels: vertical scale, bandwidth limitation (no indicator = full band-
The "Apps Selection" dialog provides fast access to all available applications.
► There are several ways to open the "Apps Selection" dialog:
●
Press the
●Tap the "Menu" rhomb icon in the lower right corner of the screen.
–Scroll down.
–Select "Apps".
[Apps Selection] key.
4.3Using the touchscreen
4.3.1Accessing functionality using the main menu
Using the touchscreen of the R&S RTM3000 is as easy as using your mobile phone.
To open the main menu, tap the "Menu" button - that is the R&S logo in the right bottom corner of the display.
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Operating basics
Using the touchscreen
3
2
1
Figure 4-2: Open the main menu and select a menu item
1
1
2
Figure 4-3: Switch on or off (left) and select a parameter value (right)
► To close the menu:
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4.3.2Accessing functionality using shortcuts
Operating basics
Using the touchscreen
Tap "Back", or tap into the diagram outside the menu.
The labels in information bar at the top of the display, the channel labels and also the
results at the bottom provide shortcuts to the most important settings. If you tap a label,
a short menu opens, the keypad for numerical entry, the setting toggles, or the corresponding menu opens. The response depends on the selected parameter.
Figure 4-4: Short menus for channel (left) and trigger slope (right)
From the short menu, you can also open the corresponding comprehensive menu.
You can also switch off the channels.
4.3.3Entering data
To enter exact numerical values, the instrument provides an on-screen keypad. For
text input, the on-screen keyboard works in the same way.
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Operating basics
Using the touchscreen
3
2
1
Figure 4-5: Enter numerical value and unit
4.3.4Using gestures
Drag one finger
Drag horizontally in the diagram to change the horizontal position of all waveforms. In
frequency domain, the center frequency is changed.
Drag vertically in the diagram to change the vertical position of the selected waveform.
To adjust the vertical position of each waveform, the trigger level, and the trigger position, drag the corresponding marker on the display.
To drag a cursor line, tap the line and drag it to the required position.
Swipe one finger
Swipe in the menu to scroll it.
Spread and pinch two fingers
Spread or pinch two fingers in vertical direction to change the vertical scale of the
selected waveform.
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4.4Front panel keys
Operating basics
Front panel keys
Spread or pinch two fingers in horizontal direction to change the horizontal scale of all
waveforms. In frequency domain, the frequency span is changed.
Swipe two fingers
If the history option R&S RTM-K15 is installed, swipe two fingers in the diagram to
scrolls through the history segments.
For an overview of the front panel keys, see figure 3-1 on page 31.
The keys and knobs at the front panel are grouped in functional blocks:
●
Horizontal section: see Chapter 5.2.1, "HORIZONTAL controls", on page 49.
●
Vertical section: see Chapter 5.3.1, "VERTICAL controls", on page 52.
●
Trigger section: see Chapter 6.1, "Trigger controls", on page 78
●
Action section, see Chapter 4.4.1, "Action controls", on page 40.
●
Analysis section, see Chapter 4.4.2, "Analysis controls", on page 41.
4.4.1Action controls
The Action keys set the instrument to a defined state, and provide save and load functions.
[Camera]
Saves screenshots, waveforms and/or settings according to the configuration in [Save
Load] > "onetouch".
[Save Load]
Opens the "File" menu, where you can:
●
Save instrument settings, waveforms, reference waveforms, and screenshots
●
Restore (load) data which were saved before
●
Import and export settings and reference waveforms
●
Configure the screenshot output
●
Configure the behavior of the [Camera] key
[Touch Lock]
Locks the touchscreen to prevent unintended use. When the touchscreen is off, the
key is illuminated. Press again to unlock the touchscreen.
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4.4.2Analysis controls
Operating basics
Front panel keys
[Clear Screen]
Deletes all waveforms, annotations and the measurement results of deleted waveforms. All settings remain unchanged.
Remote command:
DISPlay:CLEar[:SCReen] on page 592
The controls in the [Analysis] functional block open various menus for signal analysis.
[Navigation]
The function of this universal rotary knob depends on the usage context:
●
If selection menu is open: turn the knob to select a value.
●
If a numerical value is selected in the menu, and the keypad is closed: turn the
knob to set a value.
●
If the cursors are selected, press the key to select a cursor line. Turn the knob to
change the position of the selected cursor line.
●
If an on-screen keypad or on-screen keyboard is open: turn the knob until the
required character is highlighted, then press the knob to apply the selection.
●
Otherwise: turn the knob to set the waveform intensity, or press the knob to set the
intensity to 50%.
[Cursor]
Enables the cursor with the last configured cursor setup. The second keypress opens
the "Cursor" menu. If the menu is open, pressing the key turns off the cursor and
closes the menu.
[Meas]
Opens the "Measure" menu, where you can configure up to 8 parallel measurements.
Available measurement types depend on the type of the selected waveform.
[Intensity]
Opens the "Intensities" menu to adjust the luminosity of display elements and the persistence.
[QuickMeas]
Displays the results of basic automatic measurements for the selected channel below
the grid and directly on the waveform.
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Operating basics
Using the toolbar
Press the key to stop quick measurements.
Note: Channels other than the selected one are switched off in quick measurement
mode. When you activate quick measurements, cursor measurements are automatically deactivated. Deactivate quick measurements before selecting the cursors.
[Search]
Enables the search with the last configured setup. The second keypress opens the
"Search" menu, where you can perform a search for various events in an acquisition for example, peaks or specific width conditions - and analyze the search results.
[FFT]
Activates the spectrum analysis functions with the last configured setup. The second
keypress opens the "FFT" menu.
To deactivate spectrum analysis, press the [FFT] key until the time domain waveform is
displayed.
[Protocol]
Opens the "Bus" menu, which contains the configuration of serial and parallel buses
and the settings for decoding the signals. Key function requires at least the MSO
option R&S RTM-B1 or one of the serial protocol options. See data sheet for available
options.
[Gen]
Opens the "Function Generator" menu, where you can create various waveforms. Key
function requires option R&S RTM-B6.
[Apps Selection]
Opens the "Apps Selection" dialog where you can select the required application or
protocol for your task, for example, mask testing or CAN protocol.
4.5Using the toolbar
The toolbar at the top of the display provides direct access to important control and
measurement functions. The selected function is highlighted. By default, the toolbar
shows the most frequently used functions. You can configure the content of the toolbar
so that only the required functions are displayed..
Some of the toolbar functions are one-click actions. These actions are performed
immediately when you tap the icon. Other toolbar functions are interactive actions.
When you tap an interactive action, a message informs you what to do next.
Configuring the Toolbar
1. Tap the "Toolbar Setup" icon.
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Operating basics
Quick access
2. Disable the functions that you do not need.
3. Tap the functions that you need. You can select maximum 8 functions.
4. Close the dialog box.
4.6Quick access
If the measurement task requires to change the settings from different menus repeatedly, you can use the "QuickAccess". The "QuickAccess" is a user-defined menu,
which can be added to the toolbar.
To configure the "QuickAccess" menu:
1. Add the "QuickAccess" icon to the toolbar as described in "Configuring the Toolbar"
on page 42.
2. Add the required settings and functions to the "QuickAccess" menu:
a) Open the menu that contains the setting.
b) Drag the setting from the menu and drop it on the diagram.
The setting is added to the "QuickAccess".
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Operating basics
Menu history
c) Repeat steps a) and b) for each setting and function that you need for the mea-
surement task.
3. To remove unwanted settings and functions:
a)
Tap the "Settings" icon of the function.
b) To delete the selected setting or function, tap "Delete".
c) To delete the complete "QuickAccess" menu, tap "Delete All".
► To show or hide the "QuickAccess" menu, tap the "QuickAccess" icon on the tool-
bar.
4.7Menu history
The menu history is another way to speed up and simplify the usage of the
R&S RTM3000. The menu history is also a user-defined menu, which can be added to
the toolbar. It logs all menus that you used during the current session.
1. Add the "Menu Hist." icon to the toolbar as described in "Configuring the Toolbar"
on page 42.
2. Open some menus and set up parameters.
3. Tap the "Menu Hist." icon on the toolbar.
4. Tap the menu that you want to open.
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4.8Getting help
Operating basics
Getting help
In most menus and dialogs, graphics explain the meaning of the selected setting. For
further information, you can open the help, which provides functional description of
selected setting.
To open the help window
1. Tap the "Menu" icon in the lower right corner of the screen.
2. Tap "Help" on the top of the main menu.
3. Tap the setting for which you need information.
2
3
To close the help window
► Tap "Help" on the top of the main menu, or tap the "Close" icon in the upper right
corner of the help window.
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5Waveform setup
5.1Connecting probes and displaying a signal
Waveform setup
Connecting probes and displaying a signal
This chapter describes how to connect and set up probes, to adjust the horizontal and
vertical settings, and to control the acquisition.
Risk of instrument damage
Make sure to set the attenuation factor on the instrument according to the probe being
used. Otherwise, the measurement results do not reflect the actual voltage level, and
you might misjudge the actual risk.
The attenuation of the probes that are delivered with the instrument, and the default
attenuation factor of the instrument are 10:1. If you use only the delivered probes and
did not change the attenuation factor, no attenuation adjustment is required.
1. Connect the probes first to the channel inputs, and then to the DUT.
2. Tap the label of the used channel in the bottom line of the display.
3. Tap "Probe".
4. Select the attenuation factor of the probe.
The probe's attenuation factor is indicated on the probe.
No attenuation of passive probes with AC coupling:
If AC coupling is set, the attenuation of passive probes has no effect, and voltage is
applied to the instrument with factor 1:1. Observe the voltage limits, otherwise you
can damage the instrument.
Current measurements:
If you measure current using a shunt resistor as a current sensor, you have to multiply the V/A-value of the resistor by the attenuation of the probe. For example, if a
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Waveform setup
Horizontal setup
1 Ω resistor and a 10:1 probe is used, the V/A-value of the resistor is 1 V/A. The
attenuation factor of the probe is 0.1, and the resulting current probe attenuation is
100 mV/A.
5. If you connect several probes, repeat steps 2 to 4 for the remaining channels.
6. Press the [Autoset] key.
[Autoset]
Analyzes the enabled analog channel signals, and adjusts the horizontal, vertical, and
trigger settings to display stable waveforms.
In particular, autoset adjusts the following settings:
●
Vertical settings of analog channels: vertical scale, offset, and position
●
Horizontal settings: time scale (also in Zoom, Quickmeas, FFT, and XY mode), horizontal position of the trigger
●
Trigger: set to automatic trigger mode and edge trigger type (except for pattern trigger), trigger source to active existing signal, automatic hysteresis, trigger coupling
to DC, switch off HF / noise reject and hold off
●
Reference and math waveforms are switched off
●
Annotations are deleted
●
Menus are closed
Autoset does not switch off analog and vertical channels, and it does not change the
instrument mode, cursor, measurement, and waveform generator settings.
To adjust only vertical settings of one channel, use the "Auto Scale" function in the
channel short menu, see Chapter 5.3.2, "Short menu for analog channels",
on page 54.
Remote command:
AUToscale on page 434
[Preset]
Resets the instrument to the scope mode and to default state, without analyzing the
signal. The user-defined configuration, measurements and other settings are removed
and all channels and waveforms, except for channel 1, are disabled.
Preset does not change the display settings.
See also: Chapter 11.3, "Reset", on page 234.
Remote command:
*RST on page 432
5.2Horizontal setup
Horizontal settings, also known as timebase settings, adjust the waveforms in horizontal direction.
Typically, the trigger is the determining point of the waveform record. In many scenarios, you want to analyze the waveform some time before or after the trigger. To adjust
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Waveform setup
Horizontal setup
the horizontal acquisition window to the waveform section of interest, you can use the
following parameters:
●
The horizontal position defines the time distance of the trigger point (the zero
point of the diagram) to the reference point. Changing the horizontal position, you
can move the trigger point, even outside the screen.
●
The reference point is the rescaling center of the time scale on the screen. If you
modify the time scale, the reference point remains fixed on the screen, and the
scale is stretched or compressed to both sides of the reference point.
Unlike vertical settings, which are waveform-specific, the horizontal settings apply to all
active waveforms.
There are several ways to adjust horizontal settings:
●
Use the controls in the Horizontal functional block of the front panel to scale the
waveforms, and to set the position.
●
Drag one finger horizontally on the screen to change the horizontal position.
Spread or pinch two fingers to change the horizontal scale.
●
Use shortcuts to adjust scale and position.
●
Use the comprehensive menu to adjust all horizontal settings.
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5.2.1HORIZONTAL controls
Waveform setup
Horizontal setup
[Position]
Changes the trigger position, the time distance from the trigger point to the reference
point (trigger offset). The trigger point is the zero point of the diagram. Thus, you can
set the trigger point even outside the diagram and analyze the signal some time before
or after the trigger.
Turn clockwise to move the position to the right, and press the knob to reset the value
to zero. The current value is shown in the information bar.
In zoom and FFT, the knob sets the position in the active diagram. Tap the diagram
that you want to adjust. If a zoom is active, either the position of the zoom window or
the trigger position is changed. In an FFT diagram, the knob changes the center frequency in frequency domain, or the trigger position in time domain.
Remote command:
TIMebase:POSition on page 453
REFCurve<m>:HORizontal:POSition on page 486
TIMebase:ZOOM:TIME on page 478
[Scale]
Adjusts the time scale of the horizontal axis for all signals, also known as timebase.
Turn clockwise to stretch the waveforms - the scale value time/div decreases. Press
the knob to toggle between coarse and fine scale adjustment. The current value is
shown in the information bar.
In a zoom diagram, the knob changes the zoom scale. In an FFT diagram, the knob
changes the span. Tap the diagram that you want to adjust.
Remote command:
TIMebase:SCALe on page 452
REFCurve<m>:HORizontal:SCALe on page 486
TIMebase:ZOOM:SCALe on page 478
[Zoom]
Enables or disables the zoom with the last configuration.
See also: Chapter 7.1, "Zoom", on page 101.
Remote command:
TIMebase:ZOOM:STATe on page 478
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5.2.2Shortcuts for horizontal settings
Waveform setup
Horizontal setup
[Horizontal]
Opens the menu to configure horizontal scale, position, and reference point. The current scale and position is shown in the top information bar.
If zoom is active, you can find also the zoom scale and zoom position in this menu.
[Acquisition]
Opens the "Acquisition" menu. Here you control the data processing - how the waveform is built from the captured samples. The current acquisition mode is shown in the
top information bar.
See also: Chapter 5.5, "Acquisition setup", on page 72.
To adjust the horizontal scale and the position, you can use the shortcuts on the top of
the display. The labels show the current values.
1
= adjust horizontal scale
2 = adjust horizontal position
5.2.3Horizontal settings
The comprehensive "Horizontal" menu contains all horizontal settings. In zoom mode,
also zoom settings are listed in the menu.
► To open the menu, press the [Horizontal] key.
Reference Point
Defines the time reference point in the diagram. It is indicated by a gray triangle outline
at the bottom of the diagram.
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Vertical setup
The reference point defines which part of the waveform is shown. By default, the reference point is displayed in the center of the window, and you can move it to the left or
right.
The reference point is the rescaling center of the time scale on the screen. If you modify the time scale using the [Scale] knob, the reference point remains fixed on the
screen, and the scale is stretched or compressed to both sides of the reference point.
If you spread and pinch two fingers on the touchscreen to change the time scale, then
the reference point is set between the fingers.
Remote command:
TIMebase:REFerence on page 453
Time Scale
Defines the time scale of the horizontal axis for all signals, also known as timebase.
The scaling is indicated in the information bar above the grid.
Remote command:
TIMebase:SCALe on page 452
Horizontal Position
Defines the trigger position, the time distance from the trigger point to the reference
point (trigger offset). The trigger point is the zero point of the diagram. Changing the
horizontal position, you can move the trigger, even outside the screen.
If you want to see a section of the waveform some time before or after the trigger, enter
this time as horizontal position. The requested waveform section is shown around the
reference point. Use positive values to see waveform sections after the trigger - the
waveform and the diagram origin move to the left.
The value is indicated in the information bar above the grid.
Remote command:
TIMebase:POSition on page 453
5.3Vertical setup
The controls and parameters of the vertical system adjust the vertical scale and position of the waveform, and the waveform display. The probe settings also belong to the
vertical setup.
The channel labels at the bottom of the display show the basic vertical settings: vertical
scale (for example, channel 3 in the figure below: 500 mV/div), coupling (AC), probe
attenuation (10:1), and bandwidth (if limited). Clipping of a waveform is indicated by
orange arrows. The label of the selected channel has a brighter colored line on the top.
Figure 5-1: Channel labels. Channel 3 is selected. Channel 1 waveform is clipped.
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5.3.1VERTICAL controls
Waveform setup
Vertical setup
There are several ways to adjust vertical settings:
●
Use the controls in the Vertical functional block of the front panel to select the
channel, to scale the waveform, and to set the position.
●
Drag one finger vertically on the screen to change the position of the selected
channel waveform.
●
Spread or pinch two fingers in vertical direction to change the vertical scale of the
selected waveform.
●
Use the short menu to adjust coupling and the probe, and to set the vertical scale
automatically.
●
Use the comprehensive menu to adjust all vertical settings.
[Ch <n>]
For each analog channel, a channel key is available. The key is illuminated in the
channel color, if the channel is on.
The effect of the keypress depends on state of the channel:
●
If channel is off: Turns on the channel and selects it. The rotary knobs alongside
light up in the channel color.
●
If the channel is on and in focus (selected): Opens the corresponding channel
menu.
●
If the channel is on but not in focus (not selected): Selects the channel waveform.
●
If the channel is selected, and the menu is open: Pressing the key turns off the
channel.
Remote command:
CHANnel<m>:STATe on page 436
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Waveform setup
Vertical setup
[Offset/Position (upper knob)]
The upper vertical knob adjusts the following, depending on the selected waveform:
●
Offset or position of an analog channel (adjustable: main menu > "Vertical"). The
visual effect is the same. While the offset sets a voltage, position is a graphical setting given in divisions.
●
Vertical position of a math or reference waveform, serial bus, or logic pod
The knob lights up in the color of the selected waveform. Turn clockwise to move up
the waveform. Pressing the key has the following effects:
●
Analog channels, math waveforms, and buses: sets the value to zero.
●
Reference waveforms: sets to original position or to 0 divisions.
●
FFT and single bits of a pod: set to default value.
●
Pods: set to the center of the display.
Remote command:
CHANnel<m>:POSition on page 437
CHANnel<m>:OFFSet on page 437
CALCulate:MATH<m>:POSition on page 481
REFCurve<m>:VERTical:POSition on page 486
[Scale]
Sets the vertical scale in Volts per division to change the displayed amplitude of the
selected waveform. For analog waveforms, the scale value is shown in the waveform
label at the bottom. The knob lights up in the color of the selected waveform.
Turn [Scale] clockwise to stretch the waveform. Doing so, the scale value V/div decreases. Press the knob to toggle between fine and coarse adjustment.
To get the maximum resolution of the waveform amplitude, make sure that the waveforms cover most of the screen's height.
Remote command:
CHANnel<m>:SCALe on page 436
CALCulate:MATH<m>:SCALe on page 482
REFCurve<m>:VERTical:SCALe on page 486
[Logic]
Enables the logic channels. The second keypress opens the menu, where you can
select and configure digital channels for analysis. If the menu is open, pressing the key
disables the logic channels.
Key function requires MSO option R&S RTM-B1.
Logic analyzer functions are described in Chapter 15, "Logic analyzer (option
R&S RTM-B1, MSO)", on page 392.
[Ref]
Displays the reference waveforms with their last configuration. The second keypress
opens the menu, where you can select, create, save and load reference waveforms. If
the menu is open, pressing the key disables the reference waveforms.
Reference waveforms are described in Chapter 7.3, "Reference waveforms",
on page 116.
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5.3.2Short menu for analog channels
Waveform setup
Vertical setup
[Math]
Displays the math waveforms with their last configuration. A math waveform is a waveform that is calculated from the captured data. The second keypress opens the menu,
where you can activate and configure math waveforms, and save and load equation
sets. If the menu is open, pressing the key disables the math waveforms.
Mathematics is described in Chapter 7.2, "Mathematics", on page 105.
To adjust the probe and the coupling, you can use the short menu. Here you can also
open the comprehensive menu, and switch off the channel.
► To open the short menu for a channel, tap the channel label in the bottom line of
the display.
If the channel was not selected, tap twice: Once to select the waveform, and next
to open the short menu.
Functions in the short menu:
●
"AC | DC": see "Coupling"on page 56.
●
"<current bandwidth>" ("20MHz" in the above example): see "Bandwidth"
on page 56.
●
Termination: "1 MΩ" or "50 Ω", see "Termination"on page 56.
●
"Probe": opens the "Probe" menu, see Chapter 5.4.2, "Probe settings for probes
with BNC connector", on page 62.
●
"Auto Scale": analyzes the selected channel signal and adjusts the vertical scale.
This function is only available in the channel short menu.
●
"Off": turns off the channel.
●
"Menu": opens the channel menu.
5.3.3Vertical settings
The comprehensive "Vertical" menu contains all vertical settings.
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Waveform setup
Vertical setup
1. To open the "Vertical" menu:
a) Open the main menu.
b) Select "Vertical".
2. Select the parameter that is assigned to the upper vertical knob: "Offset" or "Position".
3. Open the channel menu.
► To open the channel menu directly, press the corresponding channel key.
If the channel was active but not selected, press twice: Once to select the waveform, and next to open the short menu.
Figure 5-2: Channel menu, split into two halves
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Waveform setup
Vertical setup
Vert. Position Knob
Selects the parameter to be changed with the [Offset/Position (upper knob)]: "Offset" or
"Position". By default, position is set. [Preset] does not affect the assignment.
Channel <n>
Opens the channel menu.
State
Switches the selected channel on or off.
Remote command:
CHANnel<m>:STATe on page 436
Coupling
Selects the input coupling, which influences the signal path between input connector
and the following internal signal stage. The current coupling of each channel is shown
in the waveform labels below the grid.
"AC"
"DC"
Remote command:
CHANnel<m>:COUPling on page 437
AC coupling is useful if the DC component of a signal is of no interest. AC coupling blocks the DC component of the signal so that the
waveform is centered on zero volts.
If AC coupling is set, the attenuation of passive probes has no effect,
and voltage is applied to the instrument with factor 1:1. Observe the
voltage limits, otherwise you can damage the instrument.
With DC coupling, the input signal passes unchanged, all signal components are shown.
Termination
Adjusts the input impedance of the instrument to the impedance of the DUT. If an
active Rohde & Schwarz probe is used, the termination is read out from the probe usually it is 50 Ω.
"1 MΩ"
"50 Ω"
Remote command:
CHANnel<m>:COUPling on page 437
Bandwidth
Selects the bandwidth limit. At full bandwidth, all frequencies in the specified range of
the instrument are acquired and displayed accurately with less than 3 dB attenuation.
Full bandwidth is used for most applications.
A high input resistor minimizes the loading effect on the device under
test. This value is set automatically if a passive probe is connected,
and cannot be changed.
Used for measurement systems with characteristic impedance of
50 Ω. The input resistor of the oscilloscope minimizes the reflections
along the signal path, and increases the accuracy of measurement
results. DC coupling is set automatically. 50 Ω termination is indicated
in the waveform labels by an Ω.
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Waveform setup
Vertical setup
To reduce noise, you can set a frequency limit. Higher frequencies are removed from
the signal. Limited bandwidth is indicated by "BW" in the waveform label.
For analog applications, the highest signal frequency determines the required oscilloscope bandwidth. The oscilloscope bandwidth should be at least 3 times higher than
the maximum frequency included in the analog test signal to measure the amplitude
without aliasing.
Most test signals are more complex than a simple sine wave and include several spectral components. A digital signal, for example, is built up of several odd harmonics. For
digital signals, the oscilloscope bandwidth should be at least 5 times higher than the
clock frequency to be measured.
The oscilloscope is not an autonomous system. You need a probe to measure the signal, and the probe has a limited bandwidth, too. The combination of oscilloscope and
probe creates a system bandwidth. To reduce the effect of the probe on the system
bandwidth, the probe bandwidth should exceed the bandwidth of the oscilloscope, the
recommended factor is 1.5 x oscilloscope bandwidth.
Remote command:
CHANnel<m>:BANDwidth on page 438
Vertical Scale
Sets the vertical scale in Volts per division to change the displayed amplitude of the
selected waveform. The current value is shown in the waveform label below the grid.
Vertical scale directly affects the resolution of the waveform amplitude. To get the full
resolution of the ADC, set up the waveforms to cover most of the height of the diagram.
Remote command:
CHANnel<m>:SCALe on page 436
Offset
Sets the offset voltage, which corrects an offset-affected signal. The vertical center of
the selected channel is shifted by the offset value and the signal is repositioned within
the diagram area. To set the offset automatically, use [Autoset].
Use the offset to measure small AC voltages that are overlaid by higher DC voltages.
Unlike AC coupling, the DC part of the signal is not lost with offset setting.
If an active probe is connected, the offset limit is defined by the probe. Refer to the
documentation of the probe for allowed values.
If an active differential probe is connected, set the common-mode offset to compensate
for a common DC voltage applied to both input sockets (referenced to the ground
socket). Thus, you can measure on differential signals with high common mode levels.
You can measure the common mode input voltage using the R&S ProbeMeter.
If you use a R&S RT‑ZM modular probe, the "Offset" is the differential offset. The differential offset is a DC voltage applied between the positive (Vp) and the negative (Vn)
input terminal at the probe tip. The common mode offset is set separately in the
"Probe" menu.
Remote command:
CHANnel<m>:OFFSet on page 437
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Waveform setup
Vertical setup
Position
Moves the selected signal up or down in the diagram. While the offset sets a voltage,
position is a graphical setting given in divisions. The visual effect is the same as for offset.
Remote command:
CHANnel<m>:POSition on page 437
Ground
Connects the input to a virtual ground. All channel data is set to 0 V. Ground connection is labeled with
Remote command:
CHANnel<m>:COUPling on page 437
Invert
Turns the inversion of the signal amplitude on or off. To invert means to reflect the voltage values of all signal components against the ground level. Inversion affects only the
display of the signal but not the trigger.
For example: if the oscilloscope triggers on the rising edge, the trigger is not changed
by inversion, but the actually rising edge is displayed as falling edge.
Inversion is indicated in the waveform labels by line above the channel name.
Remote command:
CHANnel<m>:POLarity on page 438
. The coupling is not affected by the ground setting.
Deskew
Sets a time delay for the selected channel.
Deskew compensates delay differences between channels caused by the different
length of cables, probes, and other sources. Correct deskew values are important for
accurate triggering. Signals that are routed over lines with different lengths have a different propagation delay. This delay can lead to a non-synchronous waveform display.
For example, a coax cable with a length of 1 meter has a propagation delay of typically
5.3 ns.
Remote command:
CHANnel<m>:SKEW on page 439
Zero Adjust
Differences in DUT and oscilloscope ground levels can cause larger zero errors, which
affect the waveform. If the DUT is ground-referenced, the "Zero Adjust" corrects the
zero error and sets the probe to the zero level.
You can assess the zero error by measuring the mean value of a signal that returns
zero.
Remote command:
CHANnel<m>:ZOFFset[:VALue] on page 439
Waveform Color
Selects the color scale for the waveform color. Each scale comprises a set of colors,
where each color represents a certain frequency of occurrence.
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Waveform setup
Vertical setup
"Temperature"
"Rainbow"
"Fire"
"Default"
Remote command:
CHANnel<m>:WCOLor on page 439
Probe
See Chapter 5.4.2, "Probe settings for probes with BNC connector", on page 62 and
Chapter 5.4.3, "Probe settings for probes with Rohde & Schwarz interface",
on page 63.
Threshold
See Chapter 5.3.4, "Threshold settings", on page 59.
Label
See Chapter 5.3.5, "Label settings", on page 60.
Display in temperature colors. Blue corresponds to rare occurrences
of the samples, while white indicates frequent ones.
Display in rainbow colors. Blue corresponds to rare occurrences of
the samples, while red indicates frequent ones.
Display in fire colors. Yellow corresponds to rare occurrences of the
samples, while red indicates frequent ones.
Displays the waveform in its default monochrome color.
5.3.4Threshold settings
A threshold is used for digitization of analog signals. If the signal value is higher than
the threshold, the signal state is high (1 or true for the Boolean logic). Otherwise, the
signal state is considered low (0 or false) if the signal value is below the threshold.
Access: [Ch <n>] > "Threshold" (scroll down).
Threshold
A threshold is used for digitization of analog signals. If the signal value is higher than
the threshold, the signal state is high (1 or true for the Boolean logic). Otherwise, the
signal state is considered low (0 or false) if the signal value is below the threshold.
Remote command:
CHANnel<m>:THReshold on page 440
Hysteresis
To avoid the change of signal states due to noise, set the hysteresis. If the signal oscillates inside the hysteresis range and crosses the threshold, no state transition occurs.
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Waveform setup
Vertical setup
Threshold
Logic 0 Logic 1 Logic 0
The numerical values of "Small", "Medium", and "Large" hysteresis correspond to the
vertical scale.
Remote command:
CHANnel<m>:THReshold:HYSTeresis on page 441
Find Threshold
The instrument analyzes the channel and sets the threshold for digitization. If no level
can be found, the existing value remains unchanged, and you can set the thresholds
manually.
Remote command:
CHANnel<m>:THReshold:FINDlevel on page 441
5.3.5Label settings
Hysteresis
In the "Label" menu, you can define a name label for the selected waveform.
Access: [Ch <n>] > "Label" (scroll down).
Label
Activates or deactivates the label display. The label is shown at the waveform on the
right edge of the display.
Remote command:
CHANnel<m>:LABel:STATe on page 441
CHANnel<m>:LABel on page 441
Predefined Label
Selects a predefined label text. You can edit the text with "Edit Label".
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5.4Probes
Waveform setup
Probes
Edit Label
Opens on-screen keypad to enter a label text. If you previously have selected a predefined label, it is already written in the entry line, and you can modify it.
The maximum name length is 8 characters, and only ASCII characters provided on the
on-screen keypad can be used.
With R&S RTM3000, you can use various probe types. Mostly these probes are passive and active voltage probes but also current probes are supported.
The "Probe" menu provides all probe-relevant information. The functionality in the
menu changes according to the type of the attached probe. Probes with
Rohde & Schwarz probe interface (probe box) are recognized by the instrument. The
R&S RTM3000 reads out the main characteristics of the probe and displays them.
Probes that are not recognized automatically require manual setting of measurement
unit and attenuation.
5.4.1Adjusting passive probes
When using a passive probe, you have to compensate it when you connect it to the
instrument the first time. Compensation matches the probe cable capacitance to the
oscilloscope input capacitance to assure good amplitude accuracy from DC to upper
bandwidth limit frequencies. A poorly compensated probe reduces the performance of
the probe-oscilloscope system and introduces measurement errors resulting in distorted waveforms and inaccurate results.
Two connector pins for compensation are at the front panel. The left pin is on ground
level. The next pin supplies a square wave signal for the adjustment.
1.
Press the [Apps Selection] key.
2. Tap "Probe Adjust".
3. Follow the instructions of the wizard. It guides you through the compensation process.
Use the compensation trimmer of the probe to get optimum square wave response.
For details, refer to the documentation of your probe.
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5.4.2Probe settings for probes with BNC connector
Waveform setup
Probes
For passive probes, which are connected with a BNC connector, you set the probe
attenuation and the unit, and you can start an adjustment procedure for the probe. All
settings are channel-specific. When you set the attenuation, you can select a predefined factor, for example "10:1", or enter a user-defined value.
If AC coupling is set, the attenuation of passive probes has no effect, and voltage is
applied to the instrument with factor 1:1. Observe the voltage limits, otherwise you can
damage the instrument.
Access: [Ch <n>] > "Probe" (scroll down). Or: short menu > "Probe"
User
If default values do not fit, you can enter an arbitrary attenuation factor. The vertical
scaling and measured values are multiplied by this factor so that the displayed values
are equal to the undivided measured signal values.
Remote command:
PROBe<m>:SETup:ATTenuation:MANual on page 442
PROBe<m>:SETup:GAIN:MANual on page 443
Unit
Selects the unit that the probe can measure.
●
V - for voltage measurements
●
A - for current measurements
Remote command:
PROBe<m>:SETup:ATTenuation:UNIT on page 442
PROBe<m>:SETup:GAIN:UNIT on page 442
Probe Adjust
Starts the probe adjustment procedure. A wizard explains the adjustment step by step.
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5.4.3Probe settings for probes with Rohde & Schwarz interface
5.4.3.1Active broadband single-ended probes
Waveform setup
Probes
Probes with Rohde & Schwarz probe interface have an integrated data memory that
contains identification data and individual probe correction parameters. The
R&S RTM3000 can detect these probes and read out the data, for example, bandwidth, termination and attenuation. These parameters do not need any adjustment.
Other parameters, like the offset value for the selected channel, the micro button action
and other probe-specific settings are defined in the probe menu. The probe menu
opens automatically when the probe is plugged in.
Access: [Ch <n>] > "Probe" (scroll down). Or: short channel menu > "Probe"
The menu provides the settings for the recognized probe. If no probe is recognized, the
default probe menu for BNC-connected probes is shown. The channel label at the bottom shows the probe type, and coupling or termination.
Active single-ended probes like R&S RT-ZS10 and R&S RT-ZS20 provide special features: the micro button and the ProbeMeter. The ProbeMeter measures DC voltages
between the probe tip and ground. Special features are available in the "Probe" menu
if the probe is connected and recognized by the instrument.
Access: [Ch <n>] > "Probe" (scroll down); or short menu > "Probe"
Figure 5-3: Probe settings of R&S
RT-ZS20 with ProbeMeter measurement
Offset
Same as "Offset" in the "Vertical" menu, see "Offset"on page 57.
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Waveform setup
Probes
Copy to offset
Sets the offset to the mean value of the ProbeMeter's DC measurement.
Remote command:
PROBe<m>:SETup:ADVanced:PMToffset on page 447
ProbeMeter
®
Shows the measurement result of the integrated R&S ProbeMeter of active
Rohde & Schwarz voltage probes.
If a single-ended or power rail probe is connected, the ProbeMeter measures DC voltages between the probe tip and ground connection and enables ground-referenced
measurements of voltages.
If a differential probe is connected, the ProbeMeter measures differential and common
mode voltages.
The ProbeMeter measures continuously and in parallel to the measurements of the
oscilloscope. The results are shown below the grid. You can switch off the ProbeMeter
using the button below the the results.
Remote command:
PROBe<m>:PMETer:VISibility, PROBe<m>:SETup:OFFSwitch on page 450
PROBe<m>:PMETer:RESults:SINGle?, PROBe<m>:SETup:DCOFfset?
on page 451
PROBe<m>:PMETer:RESults:COMMon? on page 451
PROBe<m>:PMETer:RESults:DIFFerential? on page 451
PROBe<m>:PMETer:RESults:NEGative? on page 452
PROBe<m>:PMETer:RESults:POSitive? on page 452
MicroButton
Active Rohde & Schwarz probes have a configurable micro button on the probe head.
Pressing this button, you can perform an action on the instrument directly from the
probe. During internal automatic processes the button is disabled, for example, during
self alignment, autoset, and find level.
Select the action that you want to start from the probe.
"None"
Select this option to prevent unwanted actions due to unintended
usage of the micro button.
"Continuous"
Starts continuous acquisition, like the [Run Stop] key. The acquisition
is running as long as you press the micro button again.
"Single"
"Autoset"
"Probe Menu"
"ProbeMeter®"
"Screenshots"
"OneTouch"
Starts one acquisition.
Starts the autoset procedure.
Opens the probe menu.
Shows or hides the result of the ProbeMeter measurement.
Saves a screenshot.
Initiates the assigned OneTouch actions, same effect as pressing the
key.
"Copy to offset"
Sets the offset to the mean value of the ProbeMeter's DC measure-
ment.
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Waveform setup
Probes
Remote command:
PROBe<m>:SETup:MODE on page 443
Info
Shows general information on the connected probe, for example, type, serial number,
and production date. Below, electrical characteristics are shown, like bandwidth,
attenuation, input capacitance and impedance, voltage and DC offset range.
Remote command:
PROBe<m>:SETup:NAME? on page 445
PROBe<m>:ID:BUILd? on page 444
PROBe<m>:ID:PARTnumber? on page 444
PROBe<m>:ID:PRDate? on page 444
PROBe<m>:ID:SRNumber? on page 445
PROBe<m>:ID:SWVersion? on page 445
PROBe<m>:SETup:BANDwidth? on page 446
PROBe<m>:SETup:ATTenuation[:AUTO]? on page 446
PROBe<m>:SETup:GAIN[:AUTO]? on page 446
PROBe<m>:SETup:CAPacitance? on page 446
PROBe<m>:SETup:IMPedance? on page 447
5.4.3.2Active broadband differential probes
Active differential probes like R&S RT-ZD10 and R&S RT-ZD20 provide special features: the micro button and the ProbeMeter. The ProbeMeter measures the differential
and common mode voltages. Special features are available in the "Probe" menu if the
probe is connected and recognized by the instrument.
Access: [Ch <n>] > "Probe" (scroll down); or short menu > "Probe"
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Waveform setup
Probes
Figure 5-4: Probe settings of R&S RT-ZD20 with ProbeMeter measurement
Offset
Same as "Offset" in the "Vertical" menu, see "Offset"on page 57.
Copy to offset
Same as "Copy to offset" for active broadband single-ended probes, see "Copy to off-
set"on page 64. The offset value is also shown in the "Channel <n>" menu.
ProbeMeter
®
Same as "ProbeMeter®" for active broadband single-ended probes, see "ProbeMeter®"
on page 64.
MicroButton
Same as for active single-ended probes, see "MicroButton"on page 64.
Info
Same as for active single-ended probes, see "Info"on page 65.
Attenuator RT-ZA15
If you use the external attenuator R&S RT-ZA15 together with one of the differential
active probes R&S RT-ZD10, R&S RT-ZD20 or R&S RT-ZD30, enable "Attenuator RTZA15" to include the external attenuation in the measurements.
Remote command:
PROBe<m>:SETup:ZAXV on page 449
5.4.3.3Current probes
Rohde & Schwarz provides current probes with different output connectors: BNC or
Rohde & Schwarz probe box.
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Waveform setup
Probes
Current probes R&S RT-ZCxx
The current probes R&S RT-ZCxx have BNC connectors. The setup is described in
Chapter 5.4.2, "Probe settings for probes with BNC connector", on page 62. Demag-
netizing and zero adjustment is done on the probe, see the probe's User Manual for
details. Make sure to demagnetize and adjust the probe before taking measurements.
Current probes R&S RT-ZCxxB
Current probes R&S RT-ZCxxB have a Rohde & Schwarz probe interface; they are
powered and remotely controlled by the oscilloscope.
When the probe is connected, demagnetization is performed automatically.
Access: [Ch <n>] > "Probe" (scroll down); or short menu > "Probe"
Zero Adjust
Sets the waveform to zero position. After demagnetizing, always carry out a zero
adjustment. The setting corresponds to Zero Adjust in the channel menu but the value
is set in %.
Remote command:
PROBe<m>:SETup:ADVanced:ZADJust on page 448
Save Zero Adjust
Saves the "Zero Adjust" value in the probe box. If you connect the probe to another
channel or to another oscilloscope with Rohde & Schwarz probe interface, the value is
read out again.
Remote command:
PROBe<m>:SETup:ADVanced:STPRobe on page 447
Degauss
Demagnetizes the core if it has been magnetized by switching the power on and off, or
by an excessive input. Always carry out demagnetizing before measurement. The
demagnetizing process takes about one second. During demagnetizing, a demagnetizing waveform is present at the output.
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5.4.3.4High-voltage differential probes
Waveform setup
Probes
Remote command:
PROBe<m>:SETup:DEGauss on page 447
Info
Same as for active single-ended probes, see "Info"on page 65.
Rohde & Schwarz high-voltage differential probes of the R&S RT-ZHD series have the
same settings as active broadband differential probes, and additional range settings.
Other high-voltage differential probes have a BNC interface, dor setup, see Chap-
ter 5.4.2, "Probe settings for probes with BNC connector", on page 62.
Access: [Ch <n>] > "Probe" (scroll down); or short menu > "Probe"
Figure 5-5: Probe settings of R&S RT-ZHD16 with results of ProbeMeter measurement
Copy to offset
Same as "Copy to offset" for active broadband single-ended probes, see "Copy to off-
set"on page 64. The offset value is also shown in the "Channel <n>" menu.
ProbeMeter
®
Same as "ProbeMeter®" for active broadband single-ended probes, see "ProbeMeter®"
on page 64.
MicroButton
Same as for active single-ended probes, see "MicroButton"on page 64.
Input voltage range
Sets the voltage range of a R&S RT-ZHD probe. You can set the range on the probe
control box or at the oscilloscope.
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Waveform setup
Probes
"Auto"
"<High value>"
"<Low value>"
Remote command:
PROBe<m>:SETup:ADVanced:RANGe on page 449
Bandwidth Limit
Activates the lowpass filter in the probe control box. You can also set the filter directly
on the probe control box. The limit depends on the probe type and is shown on the
probe control box.
Remote command:
PROBe<m>:SETup:ADVanced:FILTer on page 449
Audible Overrange
Activates the acoustic overrange warning in the probe control box. You can also activate the sound directly on the probe control box.
Remote command:
PROBe<m>:SETup:ADVanced:AUDioverload on page 449
The voltage range is set only at the oscilloscope by adjusting the ver-
tical scale.
Sets the higher voltage range of the connected probe. The selection
list shows the value that is specified on the probe.
Sets the lower voltage range of the connected probe. The selection
list shows the value that is specified on the probe.
Info
Same as for active single-ended probes, see "Info"on page 65.
5.4.3.5Modular probes
The probes of the R&S RT‑ZM family are modular probes with multi-mode function.
They have a probe head and a probe amplifier connected by a cable, and various
probe tip modules and tip cables for different applications. R&S RT‑ZM probes are
equipped with Rohde & Schwarz probe interface, and provide special features: ProbeMeter, micro button, and a wide offset compensation range.
Access: [Ch <n>] > "Probe" (scroll down).
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Waveform setup
Probes
Figure 5-6: Probe settings of R&S RT‑ZM30 with ProbeMeter measurement
Offset
Same as "Offset" in the "Vertical" menu, see "Offset"on page 57.
Copy to offset
Same as "Copy to offset" for active broadband single-ended probes, see "Copy to off-
set"on page 64. The offset value is also shown in the "Channel <n>" menu.
Com.Mode Offset
Sets the common mode offset to compensate for a common DC voltage applied to
both input terminals referenced to ground. You can measure the common mode input
voltage using the ProbeMeter.
ProbeMeter
®
Same as "ProbeMeter®" for active broadband single-ended probes, see "ProbeMeter®"
on page 64.
MicroButton
Same as for active single-ended probes, see "MicroButton"on page 64.
Meas. Mode
Sets the measurement mode of modular probes. You can switch between singleended, differential and common mode measurements without reconnecting or resoldering the probe.
If you use the R&S RT‑ZMA30 browser module, only DM measurements are possible
because this module has no ground connector.
The measurement modes are:
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Waveform setup
Probes
"DM"
"CM"
"P"
"N"
Remote command:
PROBe<m>:SETup:PRMode on page 448
Info
Same as for active single-ended probes, see "Info"on page 65.
5.4.3.6Power rail probes
Differential mode input voltage (Vdm), the voltage between the positive
and negative input terminal.
Common mode input voltage (Vcm), the mean voltage between the
positive and negative input terminal vs. ground.
Positive single-ended input voltage (Vp). The voltage between the
positive input terminal and ground.
Negative single-ended input voltage (VN). The voltage between the
negative input terminal and ground.
R&S RT-ZPR power rail probes have a Rohde & Schwarz probe interface with ProbeMeter, but no micro button. R&S RT-ZPR probes require 50 Ω termination, which is set
automatically. The ProbeMeter measures DC voltages between the probe tip and
ground.
Access: [Ch <n>] > "Probe" (scroll down).
Figure 5-7: Probe settings of R&S
RT-ZPR20 with ProbeMeter measurement
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Waveform setup
Acquisition setup
Offset
Same as "Offset" in the "Vertical" menu, see "Offset"on page 57.
Copy to offset
Same as "Copy to offset" for active broadband single-ended probes, see "Copy to off-
set"on page 64. The offset value is also shown in the "Channel <n>" menu.
ProbeMeter
Same as "ProbeMeter®" for active broadband single-ended probes, see "ProbeMeter®"
on page 64.
Info
Same as for active single-ended probes, see "Info"on page 65.
AC coupling for power rail probes
For the required 50 Ω input termination, the usual AC coupling is not available. Therefore, you can enable AC coupling directly in the R&S RT-ZPR probe, which removes
DC and very low-frequency components.
To enable AC coupling, use the channel menu or the short channel menu.
Remote command:
PROBe<m>:SETup:ACCoupling on page 450
®
5.5Acquisition setup
During an acquisition, the R&S RTM3000 captures the signal and converts it to digital
samples. The digital samples are processed according to the acquisition settings. The
result is a waveform record that is displayed on the screen and stored in memory.
The number of waveform samples in one waveform record is called the record length.
The rate of recording waveform samples - the number of waveform samples per second - is the sample rate. The higher the sample rate, the better is the resolution and
the more details of the waveform are visible.
A sufficient resolution is essential for correct reconstruction of the waveform. If the signal is undersampled, aliasing occurs - a false waveform is displayed. To avoid aliasing
and accurately reconstruct a signal, the sample rate must be at least 3 to 5 times the
fastest frequency component of the signal.
There are several ways to adjust and control acquisition:
●
Use the controls in the Trigger functional block of the front panel to start and stop
acquisition. See Chapter 6.1, "Trigger controls", on page 78.
●
Use shortcuts to adjust the acquisition mode, and to perform a single acquisition.
●
Use the comprehensive menu to adjust all acquisition settings.
► To start or stop acquisition, use the [Run Stop] and [ Single] keys in the Trigger
section at the front panel.
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5.5.1Shortcuts for acquisition settings
5.5.2Acquisition settings
Waveform setup
Acquisition setup
To adjust the acquisition mode, and to perform a single acquisition, you can use the
shortcuts on the top of the display. The labels show the current values.
1 = start or stop a continuous acquisition, or start a single acquisition if [Single] is active
2 = adjust the acquisition mode
3 = shows the current sample rate for information
Acquisition settings define the processing of the captured samples in the instrument.
The current acquisition mode and sample rate are shown in the top information bar.
► To adjust acquisition settings, press the [Acquisition] key.
The history is described in Chapter 7.4.3, "History settings", on page 123.
Record Length
Sets the record length, the number of waveform samples that are stored in one waveform record.
If you use the history, you can disable the "Auto" record length and enter a value in the
"History" menu. In this case, the defined record length is shown in the "Acquisition"
menu.
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Waveform setup
Acquisition setup
Remote command:
ACQuire:POINts:AUTomatic on page 454
ACQuire:POINts[:VALue] on page 455
Acquire Mode
Defines how the waveform is built from the captured samples. There are two general
methods to build the waveform record: sample decimation and waveform arithmetic.
Sample decimation reduces the data stream of the ADC to a stream of waveform
points with lower sample rate and a less precise time resolution. The R&S RTM3000
uses decimation, if the waveform sample rate is less than the ADC sample rate. The
acquisition modes "Peak Detect" and "High Resolution" are decimation methods.
Waveform arithmetic builds the resulting waveform from several consecutive acquisitions of the signal. The acquisition modes "Average" and "Envelope" are arithmetic
methods.
"Sample"
"Peak Detect"
"High Resolution"
"Average"
"Average +
HR"
"Envelope"
"Envelope + PD"
Usually, most signals are displayed optimally with this acquisition
mode but very short glitches might remain undiscovered by this
method.
If the sample rate of the waveform is less than the ADC sample rate,
the instrument reduces the number of samples: one of n samples in a
sample interval is recorded as waveform point, the other samples are
discarded (decimation). Conversely, if the sample rate of the wave-
form is higher than the ADC sample rate, the instrument adds wave-
form points to the captured samples using an interpolation method.
The minimum and the maximum of n samples are recorded as wave-
form points, the other samples are discarded. Thus the instrument
can detect fast signal peaks at slow time scale settings that would be
missed with other acquisition modes.
The average of n captured sample points is recorded as one wave-
form sample. Averaging reduces the noise, the result is a more pre-
cise waveform with higher vertical resolution.
The average is calculated from the data of the current acquisition and
a number of consecutive acquisitions before. The method reduces
random noise. It requires a stable, triggered and repetitive signal.
The number of acquisitions for average calculation is defined with
"No. of Averages"on page 75.
Combines the high resolution mode with averaging over several
acquisitions.
Each acquisition is done in sample mode, and the minimum and max-
imum values over some consecutive acquisitions build the envelope.
The resulting diagram shows two envelope waveforms below and
above the normal waveform: the minimums (floor) and maximums
(roof), representing the borders in which the signal occurs. this
method is useful, for example, if the waveform is noisy but the noise
is not relevant for the measurement.
Each acquisition is done in peak detect mode, and the most extreme
values of all consecutive acquisitions build the envelope. This method
is more precise than "Envelope".
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Waveform setup
Acquisition setup
"Envelope +
HR"
Remote command:
CHANnel<m>:ARIThmetics on page 456
CHANnel<m>:TYPE on page 455
ACQuire:PEAKdetect on page 457
ACQuire:HRESolution on page 457
No. of Averages
Defines the number of waveforms used to calculate the average waveform. The higher
the number, the better the noise is reduced.
To restart the average calculation, press the [Clear Screen] key.
Remote command:
ACQuire:AVERage:COUNt on page 457
ACQuire:AVERage:RESet on page 457
Nx Single
Sets the number of waveforms that are acquired with a [Single] acquisition.
The setting is available if the history option is installed.
Remote command:
ACQuire:NSINgle:COUNt on page 434
Each acquisition is done in high resolution mode, and the minimum
and maximum values over some consecutive acquisitions build the
envelope.
Roll
Enables the automatic roll mode. The instrument switches to roll mode if the Time
Scale is equal or slower than Start Roll Time.
The roll mode displays the untriggered, continuous signal, and moves the captured
input data on the display from the left to the right. The instrument shows the waveform
immediately, without waiting for the complete acquisition of the waveform record. The
record length is set automatically ("Auto" mode). Some math functions are non-calculable if roll mode is active.
You can use the horizontal and vertical zoom in roll mode if the acquisition is stopped.
Remote command:
TIMebase:ROLL:AUTomatic on page 458
Start Roll Time
Sets the limit timebase for the roll mode. The instrument switches automatically to roll
mode if:
●
the Time Scale exceeds the value given here.
●
the roll mode is activated (Roll).
Remote command:
TIMebase:ROLL:MTIMe on page 458
Interpolation
Selects the interpolation method if interpolation is required to get the defined record
length.
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Waveform setup
Acquisition setup
"Sin(x)/x"
"Linear"
"Sample-Hold"
Remote command:
ACQuire:INTerpolate on page 458
Two adjacent ADC sample points are connected by a sin(x)/x curve,
and also the adjoining sample points are considered by this curve.
The interpolated points are placed on the resulting curve. This inter-
polation method is the default method. It is precise and shows the
best signal curve.
Two adjacent ADC sample points are connected by a straight line, the
interpolated points are placed on the line. You see a polygonal wave-
form similar to the real signal, and also the ADC sample points as
vertexes.
The ADC sample points are displayed like a histogram. For each
sample interval, the voltage is taken from the sample point and con-
sidered as constant, and the intervals are connected with vertical
lines. Thus, you see the discrete values of the ADC.
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6Trigger
Trigger
Triggering means to capture the interesting part of the relevant waveforms. Choosing
the right trigger type and configuring all trigger settings correctly allows you to detect
various incidents in signals.
A trigger occurs if the trigger conditions are fulfilled. The instrument acquires continuously and keeps the sample points to fill the pretrigger part of the waveform record.
When the trigger occurs, the instrument continues acquisition until the posttrigger part
of the waveform record is filled. Then it stops acquiring and displays the waveform.
When a trigger is recognized, the instrument does not accept another trigger until the
acquisition is complete.
Trigger conditions include:
●
Source of the trigger signal (channel)
●
Trigger type and its setup
●
Trigger mode
In addition, the horizontal position of the trigger point and the reference point are
important to display the interesting part of the signal. See Chapter 5.2, "Horizontal
setup", on page 47.
The trigger level and position are marked in the grid. The markers have the color of the
trigger source. Information on the most important trigger settings is shown in the upper
information bar.
There are several ways to set up the trigger:
●
Use the controls in the Trigger functional block of the front panel.
●
Use shortcuts to adjust the trigger source, trigger mode, and main parameters of
the trigger type.
●
Use the comprehensive menu to select the trigger type and to adjust all trigger settings.
The R&S RTM3000 can output a pulse at the Aux Out connector when the instrument
triggers. See "Pulse"on page 99.
●Actions on trigger.................................................................................................... 98
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6.1Trigger controls
Trigger
Trigger controls
The keys and the rotary knob in the Trigger functional block adjust the trigger and start
or stop acquisition.
The green LED above the [Levels] knob lights up when the instrument triggers.
[Trigger]
Opens the "Trigger" menu.
[Source]
Changes the analog trigger source. Press the key repeatedly until the required analog
source is selected. If a digital source or serial bus was selected in the "Trigger" menu,
or if the "Trigger Type" is set to "Pattern", the key opens the menu.
The key lights up in the color of the selected channel, and the selected source is
shown in the information bar.
Remote command:
TRIGger:A:SOURce on page 460
[Auto Norm]
Toggles the trigger mode between "Auto" and "Norm". The key lights up in white if the
trigger mode is "Norm". The current mode is also shown in the information bar.
"Auto"
"Norm"
Remote command:
TRIGger:A:MODE on page 460
[Levels]
The rotary knob changes the trigger level. Turn clockwise to move up the trigger level.
Pressing the knob sets the level to 50% of the signal amplitude.
The instrument triggers repeatedly after a time interval if the trigger
conditions are not fulfilled. If a real trigger occurs, it takes prece-
dence. This mode helps to see the waveform even before the trigger
is set. The waveform on the screen is not synchronized, and succes-
sive waveforms are not triggered at the same point of the waveform.
The instrument acquires a waveform only if a trigger occurs, that is, if
all trigger conditions are fulfilled. If no trigger occurs, no waveform is
acquired and the last acquired waveform is displayed. If no waveform
was captured before, nothing is displayed.
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Trigger
Shortcuts for trigger settings
Remote command:
TRIGger:A:LEVel<n>[:VALue] on page 462
TRIGger:A:FINDlevel on page 462
[Force Trigger]
Provokes an immediate single acquisition. Use this key if the acquisition is running in
normal mode and no valid trigger occurs. Thus, you can confirm that a signal is available and use the waveform display to determine how to trigger on it.
Remote command:
*TRG on page 433
[Run Stop]
Starts and stops the continuous acquisition. A green light indicates a running acquisition. A red light shows that acquisition is stopped.
The status is shown also at the right end of the information bar: "Run", "Complete",
"Trig?" (waiting for trigger, in normal trigger mode) or "Not ready" (working). For slow
timebases, the status "Pre" or "Post" is shown together with an indicator that shows the
filling level of the buffer.
Remote command:
RUN on page 434
RUNContinous on page 434
STOP on page 435
ACQuire:STATe on page 435
[ Single]
Starts a specified number of acquisitions. A white light indicates that the instrument is
in single mode. The information bar shows "Complete" if the acquisition has been finished.
If the history option R&S RTM-K15 is available, you can set the number of acquisitions:
press the [Acquisition] key and enter "Nx Single".
Remote command:
SINGle on page 434
RUNSingle on page 434
6.2Shortcuts for trigger settings
To adjust the trigger source, mode, and trigger type specific settings, you can use the
shortcuts on the top of the display. The labels show the current values.
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6.3General trigger settings
Trigger
General trigger settings
1 = adjust the trigger source
2 = open the keypad to enter the value of the trigger level or threshold
3 = adjust slope or polarity
4 = adjust the trigger mode
5 = start or stop a continuous acquisition, or start a single acquisition if [Single] is active
6 = available settings depend on the trigger type
General trigger settings are independent of the trigger type. They are highlighted in the
above figure and described in the current section. The other trigger settings are specific for individual trigger types, and they are described in the following sections.
Trigger Mode
Toggles the trigger mode between "Auto" and "Norm". The trigger mode determines the
behavior of the instrument if no trigger occurs. The current setting is shown in the information bar.
"Auto"
The instrument triggers repeatedly after a time interval if the trigger
conditions are not fulfilled. If a real trigger occurs, it takes prece-
dence. This mode helps to see the waveform even before the trigger
is set. The waveform on the screen is not synchronized, and succes-
sive waveforms are not triggered at the same point of the waveform.
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Trigger
General trigger settings
"Norm"
Remote command:
TRIGger:A:MODE on page 460
Trigger Type
Selects the trigger type.
"Edge"
"Edge A/B"
"Width"
"Video"
"Pattern"
"Runt"
"Risetime"
"Timeout"
"Line"
"Serial Bus"
Remote command:
TRIGger:A:TYPE on page 461
The instrument acquires a normal waveform only, if a trigger occurs,
that is, if all trigger conditions are fulfilled. If no trigger occurs, no
waveform is acquired and the last acquired waveform is displayed. If
no waveform was captured before, nothing is displayed.
Triggers on signal edges.
See Chapter 6.4, "Edge trigger", on page 82.
Triggers on a sequence of two edge trigger conditions.
See Chapter 6.5, "Edge A/B trigger", on page 84.
Triggers on pulse width.
See Chapter 6.6, "Width trigger", on page 85.
Triggers on various PAL, NTSC and HDTV standard video signals.
See Chapter 6.7, "Video trigger", on page 88.
Triggers on logical combinations of the input channels.
See Chapter 6.8, "Pattern trigger", on page 90.
Triggers on pulses lower than normal in amplitude.
See Chapter 6.9, "Runt trigger", on page 93.
Triggers on fast or slow rising or falling edges.
See Chapter 6.10, "Rise time trigger", on page 94.
Triggers on signal level timeout.
See Chapter 6.11, "Timeout trigger", on page 96.
The line trigger uses the waveform of the power supply's alternating
line voltage (typically 50 Hz or 60 Hz AC) as the trigger signal source.
Use this trigger to detect issues related to the frequency of the power
grid.
The line trigger does not have any settings.
Triggers on a serial bus. Requires that at least one protocol option
R&S RTM-K1, K2, or K3 is installed, a serial bus is configured, and a
decoded signal is available.
See Chapter 13.1.1, "Protocol - common settings", on page 251.
Source
Selects the trigger source.
"C1, C2, C3,
C4"
"D0 to D15"
Select one of the analog input channels as trigger source.
Select one of the digital channels as trigger source if MSO option
R&S RTM-B1 is installed.
Not available for video, runt, and risetime trigger.
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Trigger
Edge trigger
"Extern"
"B1, B2, B3 or
B4"
Remote command:
TRIGger:A:SOURce on page 460
Hold Off, Hold Off Time
Enables the hold off and defines the "Hold Off Time". The next trigger occurs only after
the hold off time has passed.
The trigger "Hold Off" defines when the next trigger event is recognized after the current trigger event. Thus, it affects the next trigger to occur after the current one. Hold
off helps to obtain stable triggering when the oscilloscope is triggering on undesired
events.
Remote command:
TRIGger:A:HOLDoff:MODE on page 461
TRIGger:A:HOLDoff:TIME on page 462
Actions on Trigger, Configuration
Enables and select the actions to be done on trigger event. for details, see Chap-
ter 6.12, "Actions on trigger", on page 98.
Sets the external trigger input on the front panel as trigger source.
Available for edge and video trigger.
Serial bus that is used for triggering on protocols. Only available, if
the trigger type "Serial Bus" is selected.
6.4Edge trigger
The edge trigger is the most common trigger type. The trigger occurs when the signal
from the trigger source passes the trigger level in the specified direction (slope).
Figure 6-1: Edge trigger event with positive slope (rising edge)
Sets the edge direction for the trigger. You can trigger on:
●
●
●
Remote command:
TRIGger:A:EDGE:SLOPe on page 462
Trigger Level, Threshold
Sets the voltage level or threshold for the trigger.
You can also drag the trigger level marker on the display, or turn the Levels knob. To
set the trigger level to 50% of the signal amplitude, press the Levels knob.
For width and timeout trigger, the trigger level is the threshold of the trigger source.
Remote command:
TRIGger:A:LEVel<n>[:VALue] on page 462
TRIGger:A:FINDlevel on page 462
rising edge, that is a positive voltage change
falling edge, that is a negative voltage change
rising and falling edge. After starting an acquisition, the instrument triggers on
the first identified edge.
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Trigger
Edge A/B trigger
Hysteresis
Sets a hysteresis range around the trigger level. Hysteresis avoids unwanted trigger
events caused by noise oscillation around the trigger level. The automatic, small,
medium, large hysteresis values depend on the vertical scale.
Hysteresis is not available if "Source" = "Extern".
Remote command:
TRIGger:A:HYSTeresis on page 463
Coupling
Sets the coupling for the trigger source.
"AC"
"DC"
"LF Reject"
Remote command:
TRIGger:A:EDGE:COUPling on page 463
Alternating current coupling. A highpass filter removes the DC offset
voltage from the trigger signal.
Direct current coupling. The trigger signal remains unchanged.
Sets the trigger coupling to high frequency. A 15 kHz highpass filter
removes lower frequencies from the trigger signal. Use this mode
only with very high frequency signals.
HF Reject
Enables or disables an additional 5 kHz lowpass filter in the trigger path. This filter
removes higher frequencies and is available with AC and DC coupling.
You can use either "HF Reject" or "Noise Reject".
Remote command:
TRIGger:A:EDGE:FILTer:HFReject on page 463
Noise Reject
Extends the hysteresis to avoid unwanted trigger events caused by noise oscillation
around the trigger level.
You can use either "HF Reject" or "Noise Reject".
Remote command:
TRIGger:A:EDGE:FILTer:NREJect on page 463
6.5Edge A/B trigger
The edge A/B trigger is a sequence of two edge trigger conditions. The instrument triggers if both edge trigger conditions (A and B) are fulfilled. You can configure a delay
between the A- and B-trigger.
Opens a dialog where you configure the trigger sequence. On the left, the first edge
trigger (A) is defined as usual. On the right, a second edge trigger (B) is defined with
the same parameters: source, level, edge, and hysteresis. The conditions of the B-trigger are considered when the conditions of the A-trigger are met.
In addition, you can set a delay for the B-trigger ("Trigger").
Remote command:
TRIGger:B:ENABle on page 464
TRIGger:B:SOURce on page 464
TRIGger:B:EDGE:SLOPe on page 464
Trigger
Sets a time delay or event delay for the B-trigger. The instrument waits for that delay
after an A-trigger until it recognizes the B-trigger.
"After time"
"After events"
Remote command:
TRIGger:B:MODE on page 465
TRIGger:B:DELay on page 465
TRIGger:B:EVENt:COUNt on page 465
Sets the time the instrument waits until it checks the B-trigger condi-
tion.
Sets a number of B-trigger events that fulfill the B-trigger condition
but do not cause the trigger. The oscilloscope triggers on the n-th
event, the last of the specified number of events.
6.6Width trigger
The width trigger compares the pulse width (duration) with given time limits. It detects
pulses with an exact pulse width, pulses shorter or longer than a given time, and also
pulses inside or outside the allowable time range. The pulse width is measured at the
trigger level.
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Trigger
Width trigger
You can use the width trigger, for example, to trigger on glitches.
Figure 6-2: Pulse width is shorter (left) or longer (right) than a given duration (also known as glitch
Figure 6-3: Pulse width is inside or outside an allowable time range
1 = Inside: min width < pulse < max width
2 = Outside: pulse < min width OR pulse > max width
min
max
±Δ
trigger)
min
12
max
±Δ
12
Figure 6-4: Pulse width is equal or unequal to a given duration, with optional variation (Δ)
Sets the polarity of the pulse. You can trigger on:
●
●
Remote command:
TRIGger:A:WIDTh:POLarity on page 466
Comparison
Sets how the measured pulse width is compared with the given limits.
"Width >"
"Width <"
"Width ="
positive going pulse, the width is defined from the rising to the falling slopes.
negative going pulse, the width is defined from the falling to the rising slopes.
Triggers on pulse width longer than the reference "Time t".
Triggers on pulse width shorter than the reference "Time t".
Triggers on pulse width equal to the reference "Time t" if "Variation"
Δt = 0.
If "Variation" ≠ 0, this setting triggers on pulses within the range t±Δt.
"Width ≠"
Triggers on pulses unequal to the reference "Time t", if "Variation"
Δt = 0.
If "Variation" ≠ 0, this setting triggers on pulses outside a range t
± Δ
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Trigger
Video trigger
"Inside"[, ]"Outside"
Remote command:
TRIGger:A:WIDTh:RANGe on page 466
Time t
Sets the reference time, the nominal value for comparison settings "Width >",
"Width <", "Width =", and "Width ≠".
Remote command:
TRIGger:A:WIDTh:WIDTh on page 466
Variation
Sets a range Δt to the reference "Time t", if comparison is set to "Width =" or "Width ≠".
The instrument triggers on pulses inside or outside the range t±Δt.
Remote command:
TRIGger:A:WIDTh:DELTa on page 467
Time t1, Time t2
Set the lower and upper time limits defining the time range if "Width =" or "Width ≠" is
set for comparison. "Time t" and "Variation" are adjusted accordingly.
Remote command:
TRIGger:A:WIDTh:RANGe on page 466
TRIGger:A:WIDTh:DELTa on page 467
Triggers on pulses inside or outside a range specified with "Time t1"
and "Time t2".
This method is an alternative setting to the range definition with
"Time t" and "Variation". The values are interdependent. "Variation"
and "Time t" are adjusted, if you change t1 and t2, and vice versa.
Threshold
Threshold of the trigger source channel, used as trigger level for the width trigger.
See also "Threshold"on page 59 and "Trigger Level, Threshold"on page 83.
Remote command:
TRIGger:A:LEVel<n>[:VALue] on page 462
CHANnel<m>:THReshold on page 440
Hysteresis
Hysteresis of the trigger source channel, see "Hysteresis"on page 59.
Remote command:
CHANnel<m>:THReshold:HYSTeresis on page 441
6.7Video trigger
The video or TV trigger is used to analyze analog baseband video signals. You can
trigger on baseband video signals from standard definition and high definition standards connected to an analog channel input or to the external trigger input.
The instrument triggers on the sync pulses.
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Trigger
Video trigger
First select the standard and the signal polarity, then decide to trigger on lines or fields
and enter the specific settings.
Selects the color television standard.
You can trigger on various standard-definition television (SDTV) signals:
●
"PAL"
●
"NTSC"
●
"SECAM"
●
"PAL-M"
●
"SDTV 576i" (PAL and SECAM)
High-definition television (HDTV) standards are indicated by the number of active lines
and the scanning system:
●
"HDTV720p"
●
"HDTV1080p" (p for progressive scanning)
●
"HDTV 1080i" (i for interlaced scanning)
Remote command:
TRIGger:A:TV:STANdard on page 467
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T
T
Trigger
Pattern trigger
Signal
Selects the polarity of the signal. Note that the sync pulse has the opposite polarity. If
the video modulation is positive, the sync pulses are negative. If the modulation is negative, sync pulses are positive. The edges of the sync pulses are used for triggering,
therefore incorrect polarity setting causes a sporadic triggering by the video information.
Figure 6-6: Positive video signal with negative bi-level sync pulse (SDTV, left) and negative signal
with positive tri-level sync pulse (HDTV, right)
Remote command:
TRIGger:A:TV:POLarity on page 467
Mode
Selects from the following the trigger conditions:
"All Frames"
"Odd Frames"
The oscilloscope triggers on the beginning of all video signal frames.
The oscilloscope triggers on the beginning of video signal frames with
an odd frame number.
"Even Frames"
The oscilloscope triggers on the beginning of video signal frames with
an even frame number.
"All Lines"
"Line Number"
The oscilloscope triggers on the beginning of all video signal lines.
Triggers on an exact "Line" number.
Remote command:
TRIGger:A:TV:FIELd on page 468
Line
Sets an exact line number if "Mode" is "Line Number". The oscilloscope triggers exactly
on the beginning of the selected line in any field.
Remote command:
TRIGger:A:TV:LINE on page 468
6.8Pattern trigger
The pattern trigger is a logic trigger. It provides any logical combination of the input
channels and supports you in verifying the operation of digital logic. Additionally, you
can set a time limitation to the pattern. Thus you can also trigger on bus patterns of
parallel buses.
The channel pattern is configured in the "Logic Editor" dialog box.
At the bottom of the "Logic Editor", you see the current threshold settings of all channels. Here, you can directly activate the channels, and change the threshold values.
The thresholds of analog channels are also set in the "Channel <n>" > "Threshold"
menu, see also Chapter 5.3.4, "Threshold settings", on page 59.
The thresholds of logic channels are also set in the [Logic] > "Threshold and Deskew"
dialog, see Chapter 15.2, "Logic analyzer settings", on page 394.
Logic settings
H | L | X, Set All.............................................................................................................91
And | Or.........................................................................................................................92
Time limitation...............................................................................................................92
H | L | X, Set All
Defines the pattern by selecting the state "H" (high), "L" (low) or "X" (do not care) for
each active analog and digital channel.
The word length of the pattern depends on the number of available analog and digital
channels.
Analog channels: 2 bit for 2-channel instruments, 4 bit for 4-channel instruments.
Digital (16 bit): the logic channels D0, D1,...,D15 are only available with MSO option
R&S RTM-B1.
Thus the pattern can have 2, 4, 18, or 20 bits.
Use "Set All" to set all channels to the same state.
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Trigger
Pattern trigger
Remote command:
TRIGger:A:PATTern:SOURce on page 469
And | Or
Sets the logical combination of the channel states.
"AND"
"OR"
Remote command:
TRIGger:A:PATTern:FUNCtion on page 469
Duration
The switch has the following two effects:
●
Selects the mode of the True | False comparison.
●
Enables or disables the Time limitation.
True | False
Defines whether the instrument triggers on fulfillment of the logical condition, or on violation.
●
If Duration = on, the instrument triggers when the logic combination "Is True" or
"Is False" for a specified time duration.
●
If Duration = off, the instrument triggers when the logic combination is found in the
signal ("Goes True"), or if it disappears ("Goes False").
All defined states must be true.
At least one of the defined states must be true.
Remote command:
TRIGger:A:PATTern:CONDition on page 469
Time limitation
To set a time limitation for the pattern, you have several possibilities. They are similar
to the setting of a pulse width, see Chapter 6.6, "Width trigger", on page 85.
●
"Timeout" and "Time t"
Define a minimum time during which the signals match the pattern condition.
●
"Width >" or "Width <" and "Time t"
Triggers if the pattern condition changes before or after the specified time.
●
"Width =", "Time t1" and "Variation"
Triggers if the pattern condition is fulfilled for a duration "Time t1" ± "Variation".
●
"Width ≠", "Time t1" and "Variation"
Triggers if the pattern condition is fulfilled for a duration shorter than "Time t1" "Variation", or longer than "Time t1" + "Variation".
●
"Inside", "Time t1" and "Time t2"
Triggers if the pattern condition is fulfilled for a duration between "Time t1" and
"Time t2". These settings are an alternative setting to the definition with "Width =".
The time values are interdependent and adjusted accordingly.
●
"Outside", "Time t1" and "Time t2"
Triggers if the pattern condition is fulfilled for a duration shorter than "Time t1", or
longer than "Time t2". These settings are an alternative setting to the definition with
"Width ≠". The time values are interdependent and adjusted accordingly.
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6.9Runt trigger
Trigger
Runt trigger
Remote command:
TRIGger:A:PATTern:MODE on page 470
TRIGger:A:PATTern:WIDTh:RANGe on page 470
TRIGger:A:PATTern:WIDTh[:WIDTh] on page 470
TRIGger:A:PATTern:WIDTh:DELTa on page 471
A runt is a pulse lower than normal in amplitude. The amplitude crosses the first
threshold twice in succession without crossing the second one. For example, this trigger can detect logic, digital, and analog signals remaining below a specified threshold
amplitude because I/O ports are in undefined state.
Sets the polarity of a pulse, that is the direction of the first pulse slope.
●
●
●
Remote command:
TRIGger:A:RUNT:POLarity on page 472
positive going pulse, the width is defined from the rising to the falling slopes.
negative going pulse, the width is defined from the falling to the rising slopes.
selects both positive and negative going pulses.
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Trigger
Rise time trigger
Upper Level
Sets the upper voltage threshold for runt detection. A negative runt crosses the upper
level twice without crossing the lower level.
Remote command:
TRIGger:A:LEVel<n>:RUNT:UPPer on page 471
Lower Level
Sets the lower voltage threshold for runt detection. A positive runt crosses the lower
level twice without crossing the upper level.
Remote command:
TRIGger:A:LEVel<n>:RUNT:LOWer on page 471
Hysteresis
Hysteresis of the trigger source channel, see "Hysteresis"on page 59.
Remote command:
CHANnel<m>:THReshold:HYSTeresis on page 441
Find Threshold
The instrument analyzes the signal and sets the upper and lower trigger levels. If no
level can be found, the existing values remain unchanged, and you can set the thresholds manually.
6.10Rise time trigger
The rise time trigger, also known as slew rate or transition trigger, can detect fast or
slow rising or falling edges selectively. It triggers on edges, if the rise or fall time from
the lower to higher voltage level (or vice versa) is shorter or longer as defined, or inside
or outside a specified time range. The trigger finds slew rates that are faster than
expected or permissible to avoid overshooting and other interfering effects. It also
detects very slow edges violating the timing in pulse series.
Sets the edge, the transition time of which is to be analyzed:
●
●
●
Remote command:
TRIGger:A:RISetime:SLOPe on page 473
Comparison
Selects how the time limit for the slew rate is defined. The time measurement starts
when the signal crosses the first trigger level - the upper or lower level depending on
the selected slope - and stops when the signal crosses the second level.
"Greater than"
"Lower than"
rise time trigger
fall time trigger
rise and fall time trigger
Triggers on transition times longer than the given "Rise Time".
Triggers on transition times shorter than the given "Rise Time".
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Trigger
Timeout trigger
"Equal"
"Not equal"
Remote command:
TRIGger:A:RISetime:RANGe on page 473
Rise Time
Sets the reference rise time, the nominal value for comparisons.
Remote command:
TRIGger:A:RISetime:TIME on page 474
Variation
Defines a time range around the given "Rise Time" value.
Remote command:
TRIGger:A:RUNT:DELTa on page 471
Upper Level
Sets the upper voltage threshold. When the signal crosses this level, the slew rate
measurement starts or stops depending on the selected polarity.
Remote command:
TRIGger:A:LEVel<n>:RISetime:UPPer on page 473
Triggers on transition times inside the time range Rise Time ± Varia-
tion.
Triggers on transition times outside the time range Rise Time ± Varia-
tion.
Lower Level
Sets the lower voltage threshold. When the signal crosses this level, the slew rate
measurement starts or stops depending on the selected slope.
The value corresponds to the threshold value of the trigger channel.
Remote command:
TRIGger:A:LEVel<n>:RISetime:LOWer on page 472
Hysteresis
Hysteresis of the trigger source channel, see "Hysteresis"on page 59.
Remote command:
CHANnel<m>:THReshold:HYSTeresis on page 441
Find Threshold
See "Find Threshold"on page 94.
6.11Timeout trigger
The timeout trigger checks if the signal stays above or below the threshold voltage for
a specified time lapse. In other words, the trigger occurs if the trigger source signal
does not cross the threshold during the specified time.
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Trigger
Timeout trigger
time
Figure 6-8: Timeout trigger with range Stays High
► [Trigger] > "Trigger Type" = "Timeout"
Figure 6-9: Timeout trigger menu
Range
Selects the relation of the signal level to the threshold:
Stays High
Stays Low
The signal level stays above the trigger level.
The signal level stays below the trigger level.
Remote command:
TRIGger:A:TIMeout:RANGe on page 474
Time
Defines the time limit for the timeout at which the instrument triggers.
Remote command:
TRIGger:A:TIMeout:TIME on page 474
Threshold
Threshold of the trigger source channel, used as trigger level for the timeout trigger.
See also "Threshold"on page 59 and "Trigger Level, Threshold"on page 83.
Remote command:
TRIGger:A:LEVel<n>[:VALue] on page 462
CHANnel<m>:THReshold on page 440
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6.12Actions on trigger
Trigger
Actions on trigger
Hysteresis
Hysteresis of the trigger source channel, see "Hysteresis"on page 59.
Remote command:
CHANnel<m>:THReshold:HYSTeresis on page 441
A trigger event can be used to initiate one or several actions. All available actions can
be initiated at the same time, and for all trigger types.
Actions on trigger are not available if the following applications are active:
●
Mask test
●
Power analysis
●
Bode plot
To set up trigger actions
1. Stop the acquisition.
2. Press the [Trigger] key.
3. In the "Trigger" menu, activate "Actions on Trigger".
4. Select "Configuration".
5. Select the actions.
6. If "Screenshot" is selected, configure the screenshot settings in "File" menu >
"Screenshots".
7. If "Save Wavef." is selected, configure the export (waveform, target, file name and
format) in "File" menu > "Waveforms".
8. Start the acquisition with [Run Stop] or [Single].
98User Manual 1335.9090.02 ─ 10
R&S®RTM3000
Trigger
Actions on trigger
Actions on Trigger
Activates the selected actions on trigger event.
Remote command:
TRIGger:EVENt[:ENABle] on page 475
Configuration
Opens a menu to select the actions that are initiated on trigger event.
Pulse
Generates a pulse on the Aux Out connector on trigger event. The acquisition is not
delayed, the pulse generation runs asynchronously.
Enabling "Pulse" sets the "Setup" > "Aux Out" selection to "Trigger Out", and vice
versa. Selecting another item in the "Aux Out" menu disables the pulse action.
Using remote commands, you can set the pulse width and polarity of the trigger out
pulse.
Remote command:
TRIGger:OUT:MODE on page 602 (TRIGger:OUT:MODE TRIGger)
TRIGger:OUT:PLENgth on page 602
TRIGger:OUT:POLarity on page 602
Sound
Generates a beep on trigger event. The acquisition is not delayed, the sound generation runs asynchronously. The minimum time between two beeps is 1 s. If the instrument triggers faster, not all events are notified by a beep.
Remote command:
TRIGger:EVENt:SOUNd on page 475
Screenshot
Saves a screenshot on each trigger event. The screenshot is saved when the acquisition is complete. During saving, the acquisition stops, and restarts when saving is finished. Thus, the waveform update rate decreases significantly.
Set up the target directory, color, file name and file format in "File" menu > "Screenshots" before you start acquisition.
If fast segmentation is active, only the last acquisition is saved.
Remote command:
TRIGger:EVENt:SCRSave on page 476
TRIGger:EVENt:SCRSave:DESTination on page 476
Save Wavef.
Saves the data of a selected waveform on each trigger event. The waveform is saved
when the acquisition is complete. During saving, the acquisition stops, and restarts
when saving is finished. Thus, the waveform update rate decreases significantly.
Before you start acquisition, select the waveform and set up the target directory, file
name and file format in "File" menu > "Waveforms".
If fast segmentation is active, only the last acquisition is saved.
99User Manual 1335.9090.02 ─ 10
R&S®RTM3000
Trigger
Actions on trigger
Remote command:
TRIGger:EVENt:WFMSave on page 477
TRIGger:EVENt:WFMSave:DESTination, 1, en_US
References
Saves reference waveforms of all active channels, and activates the references. This
action works only with single acquisition.
The channels are assigned to the references: C1 to R1, C2 to R2 and so on. If a channel is off, the assigned reference is also not active.
If the history option is installed, and "Nx Single" > 1, the waveforms of the last acquisition are saved as reference waveforms.
Remote command:
TRIGger:EVENt:REFSave on page 476
100User Manual 1335.9090.02 ─ 10
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