Rohde & Schwarz RTB2K-COM4 Digital Oscilloscope - Review

Table of contents

RoadTest: Rohde & Schwarz RTB2K-COM4 Digital Oscilloscope

Author: ciorga

Creation date:

Evaluation Type: Independent Products

Did you receive all parts the manufacturer stated would be included in the package?: True

What other parts do you consider comparable to this product?: Tektronix 1202B-EDU, MSO 2024B, and Keysight DSOX1102G oscilloscopes

What were the biggest problems encountered?: There was no "biggest" problem encountered and actually there was no problem at all encountered. The documentation that I have downloaded from Rohde & Schwarz product webpage helped me go smoothly through the entire road test evaluation without encountering any issue. My rating for this oscilloscope product is a solid 60 out of max 60 points.

Detailed Review:

Contents:

Part 1

Product unpacking and exploring the contents

Power-up

Probes compensation

Exploring some basic measurements

Part 2

Waveform display

Trigger function

Waveform math functions

Waveform measurement functions

Statistical measurements

Part 3

Waveform mask measurement

Voltmeter function

FFT

Serial protocol analysis

Function generator

Pattern generator

Connection to a PC through a USB cable

Live screen view on a PC through a LAN cable.

 

Part 1

This is part 1 of a series of 3 parts that I have planned for the Rohde & Schwarz RTB2004 Digital Oscilloscope road test. In this part I am planning to cover product unpacking and exploring the contents, power-up and exploring some basic measurements.

First I want to thank Element14 and Rohde & Schwarz for selecting me as one of the roadtesters for the RTB2004 Digital Oscilloscope.

Second, I want to mention that this oscilloscope is now by far my favorite oscilloscope in my lab. I like that is has a large screen, I like the sharpness and clarity of the screen, the multitude of functions built in, the multitude of measurements built-in, and the clear help documentation displayed directly on the screen and easily accessible for each button and function of the oscilloscope. This help implementation is a great feature for students or anyone who is a beginner in starting and using oscilloscopes. All these features make the Rohde & Schwarz RTB2004 oscilloscope "a piece of jewelry" in my lab.

I am grateful to have the opportunity to road test this oscilloscope. Here is how it begun: I knew when the package comes from a UPS delivery confirmation email and I was happy to find it on my porch. I took the package inside the house:

Then I opened the package. The oscilloscope was well packed in bubble wrap and surrounded by a layer of protective foam:


Here is what I found inside the box: The oscilloscope, power cable, four analog probes packed in separate bags, two digital logic analyzer probes with connectors, and various documents with useful information about this product.


Here is a more detailed picture of the probes:

I have found useful a "Getting Started" document and another document that listed all the options installed with the license type.

I wanted to get faster to the point when I power up and explore this oscilloscope, so I first opened the bags with the analog probes and mount the color coded indicators.

Next I connected the power cord and I pushed the "Power" button. The oscilloscope booted very fast; I measured 15 second. Here is a picture and a video that shows the power up:

This is the link to the video:

 

First step after power up was to calibrate the probe compensation using the small screwdriver included in the probes kit and following the instructions document that came in the probe bag. Each probe has three compensation trimmers, one for low frequency compensation mounted on the hand-piece and two for high frequency compensation mounted on the connector:

I followed the instructions in the probe manual, and I connected the probe to the 1kHz square wave output on the oscilloscope front panel. I then adjusted the oscilloscope settings to display the 1kHz square wave signal, and I continued with compensating the low frequency trimmer, T1, on the hand piece. Following that I compensated the high frequency trimmers, T2 and T3. Here is a picture of the channel 1 probe connected to the 1kHz signal generator:

This connection worked well for the low frequency compensation; however, when I tried to do the high frequency compensation the loop inductance of the ground introduced significant ringing in the waveform, so much that it was impossible to see when the top and bottom edges are horizontal. Here is a picture of the waveform with ringing:

And when magnifying the horizontal time base to 5ns/div as in the instructions manual The waveform looked like this:

I then tried to understand what causes this ringing and I discovered that as I play with the probe ground wire the ringing changes. Thus, I started to suspect the loop inductance of the ground probe as the source of this ringing. To validate my assumption I removed the ground wire from the probe and I connected the probe directly to the pulse generator pins by touching the center signal pin of the probe to the generator output pin and the probe shield/ground directly to the generator ground.

Here is a short video that shows how I adjusted the low frequency (LF) and high frequency (HF) probe compensation trimmers for one of the probes:

 

 

I then continued with compensating the other three probes the same way I compensated the one for channel 1.

After compensating all probes I started to explore the various functions of this oscilloscope. First feature that I wanted to explore was the "touch-screen" user interface. This is an awesome feature of the Rohde & Schwarz RTB2K-COM4 oscilloscope. Here is a video that captures my first interaction with this oscilloscope using the touch-screen feature.

 

This concludes the first part of my road test evaluation of the Rohde & Schwarz RTB2004 Digital Oscilloscope.

 

Part 2

 

This is part 2 of a series of 3 parts that I have planned for the Rohde & Schwarz RB2004 Digital Oscilloscope road test.  In this part I am planning to cover waveform display and trigger function, waveform math functions, and waveforms measurements.

 

First I wanted to follow up on a comment I received for part 1 of this blog series from Rick, who has pointed out that there is a built-in wizard that helps the probes compensation.  So I wanted to explore this feature of the Rohde & Schwarz RTB2004 oscilloscope. I have accessed the probe compensation from the channel menu:

 

 

Then the probe settings menu opened.  On this menu I then pressed on "Probe Adjust" selection:

 

 

and then the probe compensation menu showed up.  I was impressed of the detailed explanations with drawings of how to hold the probe on the pulse generator pins so that the ground part at the tip of the probe touches the ground pin and the tip of the probe touches the signal pin:

 

 

On this screen I selected "Channel 1" probe for compensation, and this took me to the next screen for low frequency probe compensation:

 

 

I like the drawing that shows how to insert the adjustment tool into the probe and how to rotate it to perform the compensation.  These are very clear instructions and I think very beneficial especially to beginners and students.  After completing the low frequency alignment I pressed on the "Next" arrow, which took me to the high frequency compensation screen:

 

 

Here I followed the instructions until I completed the probe compensation.

 

 

Before continuing with this road test evaluation, I want to take a moment for who is a beginner in electronics  (I was a beginner long time ago) and summarize what an oscilloscope does. In a very simplistic way, an oscilloscope is an instrument that can be used to visualize how signals vary in time.  The following figure shows a graphical representation of a square wave signal and the image of this signal as shown on the display of an oscilloscope:

 

 

We can view the oscilloscope as an instrument that captures successive snapshots of the signal waveform and displays them one after another on the screen.  The trigger function of the oscilloscope ensures that each snapshot starts at the same location within the signal period so the sequence of snapshots overlap perfectly in one single waveform.  The time base function of the oscilloscope ensures that each snapshot has the same length in time, thus when sequentially displaying these snapshots the image is clear and stable.

 

So let's look at the trigger menu of the Rohde & Schwarz RTB2004 oscilloscope:

 

 

Let's see now what happens when we change the trigger level (from 1.28V shown in the above picture).  Before we look at this I wanted to magnify the x-axis and see more details about the rising edge of the waveform:

 

 

Notice that I also changed the trigger edge from "falling edge" to "rising edge", as shown in the "Slope" section of the trigger menu.  In this example I have lowered the trigger level from 1.28V to 460mV.  The waveform "shifts" on the horizontal axis so that the trigger point is always in the center of the x-axis of the screen.  I then continued to lower the trigger level until the displayed waveform became unstable:

 

 

Notice there are two waveforms overlapping on the screen above. This happened at 380mV trigger level, so let's understand why this happens by looking at the picture below:

 

 

This is why we have two overlapped waveforms, one is triggered on the rising edge and the second is triggered on the ringing of the falling edge.

 

We can magnify the x-axis by adjusting the time base (time unit / division) or we can use the "Zoom" built-in function of the Rohde & Schwarz RTB2004 oscilloscope.  I like the zoom function because I can keep the time base unchanged, thus displaying multiple rising and falling edges and I can use the "Zoom" function to see the details of each edge.  Here is an example of using the zoom function:

 

 

Notice the zoomed waveform is shown on 50 us/div while the oscilloscope is setup to 100us/div.  The zoom window can be magnified by touch screen "dragging" the zoom region edges closer to each other.  My experiment continued with gradually increasing the zoom magnification:

 

 

So the steps shown above helped me zoom and see the details of the rising edge in the center of the screen.  Following similar steps I was able to see the details of the falling edge on the right side of the screen:

 

The highlighted region on the top waveform shows the zoom window, and the trace at the bottom represents a magnified view of the top trace in the zoom region.

 

 

Let's take a look now at the waveform math function built in this Rohde & Schwarz RTB2004 oscilloscope.  The math function can be accessed from the touch screen menu at the bottom right corner of the screen:

 

 

I like the visual representation of the selected math function shown at the top of the math function menu.  I feel that this visual representation gives me the confidence that what I setup to measure is what I want to measure.  The two waveforms on the screen are obtain by probing the calibration pulse with channel 2 and the function generator output with channel 1.  I will analyze the function generator later, but here is a summary of how I setup the sinusoidal signal:

 

 

so I connected channel 1 probe to the "Aux Out" output f the oscilloscope and I then accessed the function generator menu from the main menu selection on the right side of the screen:

 

 

I like the touch-screen keypad for entering the numeric values for frequency, amplitude, offset, and noise.  Going now back to the math function, I first setup an addition between the sinusoidal and square wave signals displayed on channel 1 and 2:

 

 

The sum of sinusoidal and square wave traces is represented by the blue trace.  Next I setup a subtraction ch1 - ch2 (sinusoidal waveform minus square wave waveform):

 

 

The other two operations I tried next were multiplication and division.  The multiplication is shown in the screenshot below:

 

 

The multiplication result (blue trace) is equal to zero when the square wave is at zero volts, as we expect.  The division was more interesting, since when the square wave is at "low" level (zero volts) we divide by zero, thus the result should be infinite. Here is the division waveform:

 

 

Notice that on the positive section of the sinusoid the divide by zero sends the result to an upper rail (suggesting "+" infinite value) and on the negative section of the sinusoidal signal the result goes to a low rail (suggesting "-" infinite value).  Swapping the sinusoid with the square wave in the division operation resulted in this waveform:

 

 

Notice the infinite values are now aligned with the sinusoidal x-axis crossing points, where the sinusoidal signal has value of zero.

 

Next I looked at the built in waveform measurement functions.  I was impressed of the clarity of graphical measurement description for each type of measurement.  The measurement function is accessible from the main menu on the right side of the screen, and the measurements are grouped in four tabs, "Basic", "Vertical", "Horizontal", and "Count", each of these tabs showing the name and a graphical representation of the measurements.  Here is an example screenshot of the "Basic" group:

 

 

and here are the measurements under the "Vertical" tab:

 

 

Next I performed some measurements on Channel 1 square wave signal.  Here is a measurement of the positive peak, positive overshoot, and amplitude:

 

 

The measurements are shown at the bottom of the screen.  The overshoot definition is shown in the measurement menu.  Let's multiply the 31.89% overshoot and 2.48V amplitude, and we get 0.79V.  This value represents the magnitude of the peak overshoot.  If we add now the 0.79V and the 2.48V amplitude, we get 3.27V, which matches the peak value measured by the oscilloscope (Vp+:3.271V).

 

Similarly we can measure the peak of the falling edge:

 

 

 

Another group of measurements is represented under the "Horizontal" tab:

 

 

 

In this experiment I setup channel 1 to measure the probe compensation generator signal on the front panel and channel 2 to measure a square wave signal produced by the built-in function generator.  With this setup I then used the built-in waveform measurements to measure the delay between these two signals and the phase difference, as shown in the screenshot below:

 

 

Notice the delay between these two signals is 277.48us (as shown at the bottom of the screen).  This delay is related to the phase difference measured and displayed also at the bottom of the screen.  The relationship involves the period of the signal.  A full period represents 360 degrees phase, so the measured 277.48us represents 277.48us / 1000us = 0.27748 of the period (1000us is the period of these signals as displayed at the bottom of the screen).  Now we can find the phase difference by multiplying 0.27748 by 360 degrees, which gives us 99.89 degrees. The oscilloscope measures 100.25 degrees phase difference, which is close to what we have calculated.

 

Next I setup the built-in function generator to generate a 1V amplitude (2V peak-to-peak) sinusoidal signal, and I measured the rms and mean values:

 

 

The measurements at the bottom of the screen show the RMS voltage of 689.57mV, and the mean cycle (average, which here is around 0V since the sinusoidal signal is centered on 0V) .  The rms theoretical value for a sinusoidal signal of 1V amplitude (2V peak-to-peak) should be 0.707*1V = 707mV.  The measured value on the  Rohde & Schwarz RTB2004 screen is 689.57mV so there is a 7.4mV difference (~ 1% discrepancy) that I think it may come from the sinusoidal signal not being a perfect sinusoidal signal. The RMS (root mean square voltage) is what we measure with multimeters when we probe time varying signals  Not all oscilloscopes have built-in measurement for RMS voltage, so in many cases we need to use a digital multimeter (DMM) to measure the RMS value; however, DMMs are usually limited in bandwidth so they do not measure accurately the RMS value of high frequency signals.  I like this  Rohde & Schwarz RTB2004 oscilloscope since all the built-in measurements work up to the full bandwidth of the oscilloscope

 

So what is the physical meaning of the RMS value of a time varying signal?

 

A DMM measures the rms value of a sinusoidal signal, which is equal to the peak voltage multiplied by 0.707.

 

Here is a clarification for the "rms" (Vpeak*0.707) and also the "average" (Vpeak * 0.636) values of a sinusoidal waveform:

 

The factors 0.707 and 0.636 result from the following analysis:

 

0.707 comes from the rms voltage definition. V_rms, is a constant (DC) voltage that produces the same average power dissipation on a resistor as the sinusoidal voltage V_max*sin(ω*t). The power dissipation P = V*I = V^2 / R . So for V_rms, which remember is a DC voltage, it’s easy: P_avg = V_rms^2 / R; however, for a sinusoidal voltage P_avg = ( V_max*sin(ω*t) )^2 / R = [V_max^2 * (sin(ω*t))^2] / R . Since these two average powers have to be equal, it results that: V_rms^2 = V_max^2 * (sin(ω*t))^2. The sinusoidal term is an average over many periods of a sin square function, which from trigonometry or from an intuitive graphic (similar to a sinusoid but shifted up and varying between 0 and 1) has the value of 0.5. Inserting 0.5 in the above equation V_rms^2 = V_max^2 * 0.5, and taking square roots on both sides V_rms = V_max * squareroot(0.5) = V_max * 0.707

 

0.636 comes form calculating the time average of voltage (not power like in the rms case above) for one half cycle. By integrating the sinusoidal voltage over half of period we obtain V_max * (2/pi) = V_max * (2/3.14) =V_max * 0.636

 

 

Another type of measurements built-in the Rohde & Schwarz RTB2004 oscilloscope are statistical measurements.  To evaluate statistical measurements I setup a 10MHz square  wave signal generated by the built in function generator.  I intentionally used the ground clip of the probe instead of a coaxial connector to create some loop inductance and see a little overshoot and ringing on this waveform (see lab setup in one of the pictures above).

 

 

On this waveform I measured the period, duty cycle, and peak to peak voltage.  These measurements are shown at the bottom of the screen.  Next I activated the statistical measurements by pressing the "Statistics" selection of the measurement menu, as we can see in the picture below:

 

 

The statistical measurement values are displayed at the bottom of the screen in a table.  For each measurement type we see the current measurement in the sequence of continuous measurments, the minimum value that has been measured, the maximum value, the mean value, and the standard deviation.  Notice the standard deviation is very small compared with the mean value.  This is typical for "clean" signals, but let's see what happens with noisy signals.  The Rohde & Schwarz RTB2004 oscilloscope has a feature to inject noise in the signal generator output, which I find very beneficial for lab experiments and circuit characterization.  So I added some noise on the square wave signal, using the noise selection in the measurement menu, as shown in the screenshot below:

 

 

Noise injection is entered as percentage using a numerical keypad displayed on the screen and activated when touching the "Noise" selection on the function generator menu. I started by adding 10% noise:

 

 

Notice the standard deviation has increased, meaning that the sequence of continuous measurements capture different values of period, duty cycle, and peak-to-peak voltages every time they sample the signal (due to the added noise).  The waveform looks a little "fuzzy" due to the added noise.  Let's add more noise and see what happens:

 

 

So I increased the noise to 25%, and we can see the displayed waveform is fuzzier than before and the standard deviation has increased.  Minimum value has decreased and maximum value has increased.  Let's increase even more the noise.  Here is the waveform and measurements for 50% added noise:

 

 

and here is the waveform and measurements with 100% added noise:

 

 

One feature that I also like at this oscilloscope is the "infinite persistence" display mode, where all the previous waveform "snapshots" are maintained displayed on the screen and new signal captures are overlapped on the previously displayed ones.  This feature is beneficial for studying timing jitter and noise on signals and also for visualizing intermittent glitches in circuit troubleshooting.  Here is a screenshot of the square wave signal with 50% noise displayed with infinite persistence:

 

 

I am overall very impressed of the performance I saw so far on this Rohde & Schwarz RTB2004 oscilloscope, and I am excited to continue to do more evaluation work.  For now, this concludes the second part of my road test evaluation of the Rohde & Schwarz RTB2004 oscilloscope.

 

Part 3

 

This is part 3 of a series of 3 parts that I have planned for the Rohde & Schwarz RTB2004 Digital Oscilloscope road test.  In this part I am planning to cover waveform mask measurement function, FFT, serial protocol analysis, function generator, connection to a PC through a USB cable, and live screen view on a PC through a LAN cable.

 

Before I continue with the evaluation, I want to mention that I was very impressed of the multitude of documents I have found on Rohde & Schwarz website, documents that helped me learn quickly the features and procedures for operating the RTB2004 oscilloscope.  Here is a screenshot of the Rohde & Schwarz web page for this oscilloscope and notice in the "Downloads" section the selections: "Manuals", "Applications", "Firmware", and "Documents & Articles".

 

 

Browsing through these sections I found various interesting documents that I enjoyed reading and that helped me understand the features of RTB2004 oscilloscope and helped me operate this product.

 

Going now back to the road test evaluation, I will continue with the waveform mask measurement function.  Rohde & Schwarz RTB2004 Digital Oscilloscope can define a mask around a waveform and then verify continuously if the real-time waveform remains within the mask limits.  Passing and failing results are displayed on the screen.  To evaluate this function I first setup a 10MHz 2V pk-pk square wave signal in the RTB2004 built-in function generator:

 

 

Then I enabled the Mask function from the applications selection panel:

 

 

The mask definition menu showed up on the lower region of the screen, as shown in the picture below:

 

 

 

On this menu I selected a new mask by pressing on the "New" button and then I increased the mask boundaries using the "Size+" control.  The mask is shown with white color line surrounding channel 1 trace (yellow).  I then selected the "Run" button and the RTB2004 oscilloscope started to continuously check if the sampled waveform is within the mask.  The passing and failing results are shown on the left side of the menu:

 

 

In this example the waveform stays within the mask limits and the passing rate is 100% (failing rate is 0%).  I then wanted to generate some failures and I added noise on the square wave signal using the noise feature of the function generator, as I described in part 2 of this road test.  I started to see failures when I reached 20% noise injection:

 

 

The failures were marginal, 0.63%, so I increased even more the magnitude of injected noise:

 

 

The failure rate increased to 12.79% and we can visually see the waveform getting out of the mask region.  I further increased the injected noise until I got 100% failure rate, as shown in the screenshot below:

 

 

I like that the RTB2004 oscilloscope has waveform mask measurement feature and I find this feature beneficial in circuit and data link troubleshooting.

 

Next I wanted to take a look at the FFT function.  To do this I first setup a 2MHz 5V pk-pk signal in the RTB2004 built-in function generator:

 

 

The FFT function can be activated by pressing the "FFT" button on the front panel of RTB2004 oscilloscope.  The screen divides in two and shows the time domain waveform at the upper side and the frequency domain FFT at the lower side, as I am showing in the screenshot below:

 

 

So let's discuss now what the FFT waveform elements mean on an annotated copy of this screenshot, shown in the picture below:

 

 

The first vertical "spike" is the fundamental component located at 2MHz.  This is the frequency of the square wave signal shown in the time domain waveform viewer.  The following "spikes" represent odd harmonics at 6MHz, 10MHz, and 14MHz.  Odd harmonics continue at high frequencies beyond the measurement interval. There are also parasitic spurs superimposed on these expected spectral components.  Since rectangular signals are typically used in communication interfaces (like microprocessors, systems-on-chip, peripheral modules, and various interface signals between them) the parasitic spurs translate into timing jitter, which may degrade the performance or generate failures.

 

The FFT of a square wave signal is expected to have one fundamental component and multiple odd frequency harmonics.  Let's look now at the FFT of a sinusoidal signal also of 2MHz frequency:

We can see the fundamental component located at 2MHz and much lower odd harmonics: 6MHz harmonic is -26.38dBm compared to 8.22dbm for square wave signal.  Ideally, the FFT of a sinusoidal signal should contain only the fundamental component and no harmonics.   There are also some parasitic spurs probably caused by non-ideal sinusoidal signal or noise coupling.  When we design or troubleshoot a circuit these parasitic spurs distort the signals and degrade the performance of our projects.

 

Next I built an experiment to evaluate the serial protocol analysis function.  In this experiment I used one of my projects that has an UART serial interface between a computer and an FPGA board.  The measurement setup is shown in the picture below:

 

 

  Channel 1 was connected to the TX line and channel 2 to the RX line (of the computer side of the UART interface).  This is 3.3V UART bus so I setup the trigger levels somewhere in the middle of the swing.  The serial protocol analysis function can be activated from the on-screen menu.  On this menu I selected "UART" type interface, as shown in the figure below:

 

 

Next I needed to configure the UART parameters to match the settings I have in my FPGA project.  Rohde & Schwarz RTB2004 oscilloscope has a very clear graphical menu for configuring the serial bus parameters, as we can see in the following screenshot:

 

 

The trigger function was set to trigger on the TX start bit. With these settings I started to send data through the serial interface from computer to FPGA and back.  Here is a screenshot of the captured data packet:

 

 

The yellow trace shows the TX line and the green trace shows the RX line.  Below each waveform we see the values of the sent data in HEX format (30 BF 00 14).  This is an instruction sent to the FPGA.  The FPGA responds immediately in this case with values (E1 16 01 00) followed by a copy of what it has received from the computer (14 00 BF 30) which is a “reversed order” version of the TX line data.

 

Another function of the Rohde & Schwarz RTB2004 oscilloscope that I wanted to evaluate is the function generator.  The function generator menu can be activated from the front panel or from the on-screen menu on the right side of the display area.  Here is an example of the function generator menu that I used to setup a sinusoidal output signal:

 

 

The type of waveform is listed in the "Function" field and it is also graphically shown on the upper region of the menu.  The rest of the menu is used to setup various parameters of the generated signal.  There are more items than shown in the screenshot above, which are accessed by scrolling up and down (see the vertical blue line scroll bar).  Here are other types of signals available on the function generator:

 

 

There is also a choice of creating an arbitrary function.

 

The Rohde & Schwarz RTB2004 oscilloscope has a voltmeter function, that can be accessed from the on-screen menu.  Here is a screenshot of the available measurements:

 

Each measurement can be setup on one of the four channels of the oscilloscope.  Here is an example of DC and AC RMS measurements on a sinusoidal waveform:

 

 

The Rohde & Schwarz RTB2004 oscilloscope has a pattern generator function that can produce four signals at the pattern generator pins on the front panel.  The pattern generator menu can be accessed from the on-screen menu, as shown in the screenshot below:

 

 

The menu displays also a picture of the pattern generator pins on the front panel of the oscilloscope.  The pattern type can be selected from the "Pattern" menu. The available patterns are: four-bit counter, arbitrary pattern, manual pattern, UART, SPI, I2C, CAN, and LIN, as I am showing in the screenshot below:

 

 

I started with selecting the 4-bit binary counter pattern and connecting the four channels of the oscilloscopes to each of the pattern generator pins.  Here is a screenshot of the 4-bit binary counter pattern displayed on the RTB2004 screen:

 

 

Channel 4 shows the MSB and channel 1 the LSB of this 4-bit binary word.  The pattern generator menu displays a drawing of this pattern.  The counting direction can be changed from the "Direction" menu field.

 

Next I changed the pattern type to SPI serial.  Here is a screenshot of the waveforms displayed on the RTB2004 screen:

 

 

Other patterns that I tried are: DC pattern (shown below)

 

 

and arbitrary pattern.  The arbitrary pattern can be defined using the touch-screen feature by touching the bit time intervals on each of the P0 - P3 pattern waveforms, as shown in the following screenshots:

 

 

After defining the pattern, the oscilloscope displayed the four waveforms corresponding to P0 - P3 pattern outputs:

 

 

I continued my evaluation with looking at the waveform transfer to a computer through a USB cable.  I found very useful an application note document describing this process.  This document "walked" me step by step through connecting the oscilloscope to the computer and accessing the files process:

 

After connecting the USB cable, the oscilloscope memory showed up in the file explorer on the computer:

 

 

Using the file explorer, I was able to open the saved waveforms directly from the computer, like in this example of a saved screenshot that I opened in Microsoft Paint:

 

 

 

The Rohde & Schwarz RTB2004 oscilloscope can be also connected to a computer or a network through a LAN cable.  This sounded quite complicated to me at the beginning, but it turned out to be a very easy process after following the steps in this application notes document:

 

 

So I first connected a LAN cable between the oscilloscope and computer, and then I found the IP address of the oscilloscope displayed on the screen:

 

 

Following the instructions in the application note document I opened a web browser on the computer and I typed in the IP address.  Then the oscilloscope screen showed up in the web browser and followed in "real-time" the activity on the oscilloscope screen:

 

 

This is an awesome feature because it allows me to share the oscilloscope screen in real-time with other people in Skype and WebEx meetings and also to project it on a large screen in live meetings.

 

Here I conclude my third and last part of the Rohde & Schwarz RTB2004 oscilloscope road-test evaluation.   Overall I am very impressed of the quality and measurement capabilities of this oscilloscope, and I am happy and grateful that I had the opportunity to road test this product.

Best Wishes to Everyone,

Cosmin

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