R&S®ZVB - FAQ

Results 44
• Mixer measurement: Conversion gain too low

Mixer measurement: Conversion gain too lowQuestionThe result of the conversion gain changes with the bandwidth settings:With 500 kHz RBW, the result is correct.With 100 kHz and 10 kHz, the conversion gain is too low.What is the reason for the difference?AnswerThis effect occurs only if an external signal generator is used (i.e. for the LO frequency).To solve the problem it is necessary that VNA

• Which format has a wave quantity(b or a traces)when I get the trace as SDATA via remote control?

Which format has a wave quantity(b or a traces)when I get the trace as SDATA via remote control?QuestionI have a wave quantity b1 as the active trace and I read the trace data with the commandCALC:DATA:NSW:FIRS? SDATA,1Which format has the data?AnswerUnformatted trace data: real and imaginary part of each measurement point. Two values per trace point.ATTENTION: The unit for the wave quantity (b or

• Changing the update display rate of a sweep with many sweep points.

Changing the update display rate of a sweep with many sweep points.QuestionI need to measure a plasma and I need a sweep with 40 000 sweep points.The displayed sweep time from the VNA is 1.44 sec. This would be OK, but when I look at the effective sweep time (Pin 4 of the User Control connector), it is around 3 sec.Why is this, and how can I change it?AnswerWith the standard settings, the VNA

• Converting the real and imaginary numbers to magnitude in dB and phase in degrees.

Converting the real and imaginary numbers to magnitude in dB and phase in degrees.QuestionCould you tell me how to convert the real and imaginary numbers to magnitude in dB and phase in degrees?AnswerThe formulas for calculating the magnitude and the phase from the real (Re) and imaginary (Im) numbers are:magnitude [dB] = 20 * Log(sqr(Re^2 + Im^2))phase = arctan(Im / Re)

• Longer sweep times in CW mode

Longer sweep times in CW modeQuestionThe ZVA/B/T is switched to CW mode and a long sweep time is set. The trace shown on the display is notupdated until the sweep is finished. This makes it almost impossible to adjust the DUT during the measurement.Which settings are necessary to have the trace updated point by point (as in Normal mode)?AnswerPress "Sweep" – then select "Trigger"Select "Periodic"

• Calibration Unit and Remote Calibration

Calibration Unit and Remote CalibrationQuestionCalibration is performed remotely using the ZV-Z52, ZV-Z53 calibration units etc. Is there a way to request that calibration be performed?AnswerThe remote request[SENSe<Ch>:]CORRection:DATE?returns the acquisition date of the active error correction data.For channel 1 write:SENSE1:CORRection:DATE?

• All four S-parameter remote set up

All four S-parameter remote set upQuestionHow can we do a remote setup of the screen for all four S-parameters?AnswerThis is the SCPI command sequence. It works for the ZVA and the ZVB. The ZVL does not have the command "CALC1:DATA:ALL? SDAT" to read all traces at once. Otherwise, everything else works for the ZVL, too.ZVB: *RSTZVB: *CLSZVB: SYSTEM:DISPLAY:UPDATE ONZVB: *IDN?;

• Averaged single sweep

Averaged single sweepQuestionI have set my VNA to single sweep mode and switched on averaging with a factor of 10.But when I restart the single sweep, it stops after 1 sweep and the averaging is not done.AnswerYou also have to set Define Restart in the right side menu of the Sweep menu.In this menu point, change fromSingle SweeptoSingle Group of 10 Sweeps10 sweeps because you have an averaging

• Remote control via driver: How to use the RSZVB_Calibration_Manager

Remote control via driver: How to use the RSZVB_Calibration_ManagerQuestionI have problems with the file name of the correction data, even when I use it as it is described in the help:After a calibration, I copy the correction data to the calibration pool with the path and file name. But when I try to apply it afterwards using the same path and file name I get the error message 'File not found'.

• Remote control via driver: single sweep with average of 10 - *OPC is not working

Remote control via driver: single sweep with average of 10 - *OPC is not workingQuestionI am using the R&S drivers to program a single averaged sweep over 10 sweeps.I trigger this single sweep with the RSZVB_Send_Trigger_and_Wait_for_OPC driver, but this driver does not wait for the complete 10 sweeps.If I don't use averaging, this program is works.AnswerIn this driver the single sweep is

• Improve the calibration procedure for different setups

Improve the calibration procedure for different setupsQuestion:I have to perform a measurement with different settings (power, bandwidth, ...).If I use the microwave prober with an on-chip calibration substrate to perform a TOSM calibration, it would take a very long time because I have to reconnect all four standards for every setup.Is there a way to improve this?Answer:You can use a segmented

• Calculating error on ZVB8

Calculating error on ZVB8QuestionIf you import a CVS file from the ZVB8 into Microsoft Excel, the exponent will differ from the one saved in the ZVB8. If you open the file with a text editor, the exponents are correct.AnswerPlease change the file name from XYZ.cvs to XYZ.cls.Import the renamed CLS file into Microsoft Excel. The Text Import Wizard will open.Then Microsoft will convert the file

• Sending a Remote Control Ccommand Internally

Sending a Remote Control Ccommand InternallyQuestionI need to send a remote control command to the device, but I do not have a PC available to control the device.Can I do this internally with the device itself?AnswerYes, Go to the device's Windows function Open the Windows Explorer Open the C:\Program Files\Rohde&Schwarz\Network Analyzer\Bin folder Execute the iecwin32.exe program Choose the RSIB

• Timeout during Sweep

Timeout during SweepQuestionI have created a program with LabView.After the sweep has been finished, I query the data, but there is no response if the bandwidth is very small.AnswerIf the bandwidth is very small, the sweep can take several seconds. The default timeout ofLabView is set to 2 seconds only. Then a timeout occurs.Countermeasure:Increase the timeout setting of LabView.It can be found

Remote Control: Interaction between TCP/IP Address and Subnet MaskQuestionI want to remote-control via LAN a device from a PC. The PC and the device have their own TCP/IP addresses, but I get no connection when I use those addresses. Which function does the Subnet Mask have?AnswerThe controller can establish a connection via LAN in two different ways:It can query its local network to find a device

• German keyboard driver

German keyboard driverQuestionHow to activate a German keyboard driver on the ZVAB ?AnswerAs the instrument's operating system is a reduced Windows XP Embedded ,the switchover from the Windows system to the German keyboard driver control does not work.Please proceed as follows to change the keyboard driver:Copy the 4 files onto a memory stick and run ZVAB-KB-GER.bat to activate the German keyboard

• How can I change the display resolution when I use an external monitor?

How can I change the display resolution when I use an external monitor?QuestionI have an external monitor connected to the ZVA/B but I can only use a resolution of 800 x 600 pixels.How can I change the display resolution when I use an external monitor?AnswerTo use the ZVA/B with an external monitor and a resolution higher than 800 x 600 pixels, please proceed as follows:- Connect the external

• How to bisect the result in dB with Trace Mathematics

How to bisect the result in dB with Trace MathematicsQuestionI want to measure the attenuation of a long cable by means of an S11 measurement.The other end of the cable is terminated with a short.I use the dB magnitude format, and what I see is the attenuation of two times the cable attenuation.How can I bisect this result in dB with the Trace Mathematics?AnswerIn this context, we have to keep in

• Cannot use internal display and external monitor together at the same time.

Cannot use internal display and external monitor together at the same time.QuestionI cannot use the internal display and the external monitor together at the same time.I can either switch on the internal display or the external monitor - but not both at the same time.What's wrong?AnswerThe resolution settings for both displays must be the same if you want the internal display andthe external

• How to trigger the channels one by one in a line?

How to trigger the channels one by one in a line?QuestionI have 6 channels activated on my network analyzer.I want to trigger them in the order Ch1, Ch2, Ch3, ... and I want to trigger them separately.The INIT[Channel] command does not work.How can I trigger them the way I want?AnswerFirst, you have to set the channels to single sweep by means of the following commands:TRIG1:SOUR MANTRIG2:SOUR

• Calculate the mixed-mode S-parameter from an S4P file

Calculate the mixed-mode S-parameter from an S4P fileQuestionHow can I calculate the mixed-mode S-parameter from an S4P-file?AnswerThe single-ended S-matrixand the mode conversion matrixand the relation for the mixed-mode matrixyieldThe mode conversion matrix M delivers the mixed mode in the order 1d, 1c, 2d, 2c.The numbers refer to the logical port number where d is differential and c is common

• Source Power Calibration is very slow.

Source Power Calibration is very slow.QuestionI perform a source power calibration with an NRP-Z21 at –30 dBm on port 1, and the source power calibration takes several minutes to complete one sweep.AnswerWhen the VNA makes a source power calibration with an NRP power sensor at a very low output level, the NRP power sensor automatically switches averaging on.The power level below which averaging

• Recall of user's own calibration kits and connectors via remote

Recall of user's own calibration kits and connectors via remoteQuestionI have created my own connector type and calibration kit. But it is not possible to select it with remote commands.The command “SENS1:CORR:CKIT:<own connector>:SEL 'own connector CalKit' is not accepted.If I select it manually, there is no problem.AnswerThe above-mentioned command only works for predefined connectors, e.g. N50

• License Keycode for VNAMUC is not accepted

License Keycode for VNAMUC is not acceptedQuestionI received a License Keycode for the VNAMUC software. But the code is not accepted.The error message is: No valid license key has been inputAnswerFor the entry of the license key you need administrator rights on your computer. Then the license key is accepted.

• How can I Switch from Remote to Local State via Remote Control?

How can I Switch from Remote to Local State via Remote Control?QuestionHow can I switch from remote to local state via remote control?AnswerUsing a GPIB connection, you can send a Go To Local (GTL) command.If you use VISA, the command is viGpibControlREN and you have to send the VI_GPIB_REN_DEASSERT_GTLmode.You can also use this solution when you perform programming with drivers.If you use the

• How can I delete Cal Kit Data?

How can I delete Cal Kit Data?QuestionI have some Calibration Kits installed on my ZVA which I do not need any longer.But I can not delete them. Is there a way to do that?AnswerYes, there is a possibility to do that:Terminate the ZVA firmwareOpen the windows explorer and openC:\Program Files\Rohde&Schwarz\Network Analyzer\resources\Calibration\kitsDelete the files of the kits which you do not need

• Change the byte order in FORMAT REAL

Change the byte order in FORMAT REALQuestionWhen I use FORMAT REAL for data transfer, the byte order is swapped - the least significant bit is transferred first (little endian). Can I change this?AnswerYes, you can change the byte order using the following command:FORMat:BORDer NORMal | SWAPpedControls whether binary data is transferred in normal or swapped byte order.Parameters NORMal – The least

• How do I calculate the logarithmic steps?

How do I calculate the logarithmic steps?QuestionI read the measurement result via remote control, but I don't get the corresponding frequency points. How do I calculate these frequency points when I have a logarithmic sweep and know the center frequency, the span and the number of sweep points?AnswerThe formula for calculating the logarithmic sweep points is as follows:f(x) = 10^(log(Span)/n*x)

• Loading an S-parameter file from a PC into a memory trace

Loading an S-parameter file from a PC into a memory traceQuestionI have an S-parameter file on my PC and want to load it into a memory trace of my network analyzer.How can I do this via remote control?AnswerYou need the attached program written in VisualBasicApplication under EXCEL.If you have an NI-VISA driver installed and a GPIB or TCP/IP connection to the network analyzer, you can run the

• How to use the User Def. Math functionality

How to use the User Def. Math functionalityQuestionCan you please give me a general description of the User Def. Math functionality in the ZVA/B/TAnswerIf you want to use User Def. Math on an active trace, you don't have to add an additional trace because you can directly use it on the active trace.For example: trc1 = trc1^0.5User Def. Math always works on the linear voltage level, i.e. it works

• Remote control with driver, CalibrationAuto not working with sweep time > 2 s

Remote control with driver, CalibrationAuto not working with sweep time > 2 sQuestionThe following sequence is OK if vnaSweepTime<=2:rszvb_SetSweepTime (instrHandleVNA, channel, vnaSweepTime);rszvb_CalibrationAuto (instrHandleVNA, channel,"", 1, 2, 3, 0, 1, 2, 3, 0);If I use a longer sweep time, I get the following error:NON-FATAL RUN-TIME ERROR: "rszvb.c", line 23173, col 9, thread id0x0000099C:

• How to export Touchstone s2p files?

How to export Touchstone s2p files?QuestionCan the four-port network analyzer export Touchstone s2p files?AnswerYes, you have two options for creating an s2p file with the network analyzer - regardless of the type of analyzeryou use (two-, three- or four-port).a)- Preset- Make a full two-port calibration- Select TRACE - TRACE FUNCTION - TRACE DATA - EXPORT COMPLEX DATA- Select 'Select Ports ...

• Differential data export

Differential data exportQuestionI would like to export differential data and/or single-ended data to my computer for later examination and comparison. However, I can't export differential S-parameters in Touchstone format.AnswerThe Touchstone format is not defined for differential S-parameters.Please use instead the ASCII export under TRACE - TRACE FUNCT - TRACE DATA -EXPORT COMPLEX DATA and save

• Most accurate way to measure the length of a cable with a VNA

Most accurate way to measure the length of a cable with a VNAQuestionI have to measure the length of cables with a ZVL3 as accurately as possible.The cables are around 120 m and specified up to 1 GHz.I will measure one cable and set it as reference and I want to see the difference between the other cables and this cable.What is the best method?AnswerThe most accurate method is the phase shift

• Which settings should I use for the Transform Time Domain mode?

Which settings should I use for the Transform Time Domain mode?QuestionI have a cable of around 120 m with a velocity factor of 0.7 and a ZVL3.The length of the cable should be measured.Which settings should I use?AnswerWhen using the ZVL you can measure the length of a cable in the Transform Time Domain mode.You can make different settings for the Transform Time Domain mode which will have an

• What is the correct pin layout of the DC inputs on the network analyzer's rear panel?

What is the correct pin layout of the DC inputs on the network analyzer's rear panel?QuestionThere are two DC input connectors on the rear of the network analyzer. How is the pin-out of these connectors? What type of connector is necessary for plug-in?AnswerThe DC inputs make it possible to measure and display DC voltages or the power added efficiency (PAE)* of anactive two-port DUT. One connector

• Calibration with Auto Cal Kits and inserted attenuators

Calibration with Auto Cal Kits and inserted attenuatorsQuestionI want to perform a full calibration of all 4 ports with the automatic calibration kit ZV-Z52. At one port,a 10 dB attenuator is inserted. When I go to 'CAL – Start Cal – Calibration unit', that port (where theattenuator is inserted) is removed from the list. What is the reason for this problem?AnswerWhen 'CAL – Start Cal – Calibration

• Using remote commands to enter a label for calibration kit standards

Using remote commands to enter a label for calibration kit standardsQuestionI want to use remote commands to enter calibration kit data. I also want to enter a “label” for the different standards. In the manual I found the command to enter a label for the calibration kit, but not for the standards. What is the remote command?AnswerIn the remote commands, you have to add the label for the standard

• Reading the magnitude (dB) and phase (degrees) values directly

Reading the magnitude (dB) and phase (degrees) values directlyQuestionI am measuring the S parameter with the ZVB and extracting the measured data.The values that I am getting are real and imaginary numbers.Can I directly read out the magnitude (dB) and phase (degrees) from the ZVB?AnswerYou can directly read out the magnitude and the phase from the ZVB8.First you have to display a trace with the

• Dividing a trace by two

Dividing a trace by twoQuestionI'd like to display the attenuation versus the frequency of a coax cable connected to port 1 of a network analyzer. The coax cable has a shortede end (an open end is also possible but not recommended). The measured reflection value in "dBmag" is twice the cable attenuation. I need to divide the measured trace by two to directly read out the cable's attenuation.

• Remote control via drivers: How to set the ports in RSZVB_Select_Calibration_Type

Remote control via drivers: How to set the ports in RSZVB_Select_Calibration_TypeQuestionWhen I use the RSZVB_Select_Calibration_Type, I have the four ports Port 1 to Port 4I want to use Port 1 and Port 3, so I tried to switch them on by setting the value to 1 (the default value) and to switch off Port 2 and Port 4 by setting the value to 0.But this does not work. How do I set the ports?AnswerYes

• 4 Port Calibration with a 2 Port automatic calibration kit possible?

4 Port Calibration with a 2 Port automatic calibration kit possible?QuestionI have a automatic calibration with 2 port but I want to do a 4 port calibration at my ZVA. Is that possible?AnswerYes, this is possible:Connect your autocal unit to the ZVAEnter the calibration menue of the autocal units and click on "Modify calibration settings"--> another window opens (see attached screenshot)At "

• The minus button on the front panel does not work

The minus button on the front panel does not workQuestionThe minus button on the front panel does not work. What can I do?AnswerPlease go to the Windows menuStart - Settings - Control Paneland open the menuRegional and Language OptionsUnder Languages - Details, only the US keyboard should be entered.Please remove any other keyboard that might also be active.

• How can I start a SSST calibration?

How can I start a SSST calibration?Question:I have a calibration kit which consists of 3 offset short and one through standardThe calibration typ is called SSSTI can not find that type on ZVA/ZNB. Which type do I have to seleAnswer:At create a new calibration kit with the data of the standards.Most important is that each offset short has a different length.Then select TOSM calibration - that

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