R&S®ZVA - FAQ

Results 46
  • Change the byte order in FORMAT REAL

    When 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?Yes, 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 significant bit is transferred first (little endian

  • Login Password for ZVA

    What is the login password for the ZVA, ZVL and FSL ?For the ZVA: user name: instrument, password: instrumentFor the ZVL and FSL: user name: 123456, password: instrument

  • Source Power Calibration is very slow.

    I 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.When 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 starts as well as the averaging number depend on the NRP

  • Calibration with Auto Cal Kits and inserted attenuators

    I 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?When 'CAL – Start Cal – Calibration unit' is selected, the firmware automatically detects which port ofthe

  • How to export Touchstone s2p files?

    Can the four-port network analyzer export Touchstone s2p files?Yes, 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 ...' in the window and then select the two calibrated ports

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

    I 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?When 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 influence- on the resolution of the length measurement and- on the distance you can

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

    I 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.In this driver the single sweep is triggered with the *TRG command, and this does not work here.You have to use the driver that uses the INIT

  • How can I start a SSST calibration?

    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 seleAt 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 calbration kit will be acceptedThe calibration can be performed

  • How do I calculate the logarithmic frequency steps for the horizontal axis?

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

    I 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?You 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 program yourself.The program searches for the TEST.S1P file in 'C:\Work\'The

  • Longer sweep times in CW mode

    The 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)?Press "Sweep" – then select "Trigger"Select "Periodic"Select "Trigger settings" --> A window opensSet

  • Dividing a trace by two

    I'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. However, the trace is available in dB

  • How to use the User Def. Math functionality

    Can you please give me a general description of the User Def. Math functionality in the ZVA/B/TIf 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 on "U".Example: If the network analyzer is to show S11 in dB

  • Control external Generator in Fast Sweep Mode

    How to connect the SFM100A as an external generator for the ZVA/ZVB in Fast Sweep mode.The R&S SMF100A microwave generator can work together with an ZVA/ZVB network analyzer in the Fast Sweepmode. If Fast Sweep is activated, the analyzer compiles a list of the stimulus values (frequencies and powers) in all channels and transfers it to the generator using GPIB or LAN. The list is automatically updated

  • Differential data export

    I 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.The 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 the exported data as ASCII files (*.csv

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

    I 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?You can directly read out the magnitude and the phase from the ZVB8.First you have to display a trace with the magnitude and another trace with the phase. Then you can read the formatted data.Here

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

    I 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.The above-mentioned command only works for predefined connectors, e.g. N50 or PC35.If any other connector types are created by the user, the following command

  • Reverse sweep / backward sweep

    For my measurements I need a frequency sweep from higher to lower frequencies.How can I do this?To do this you need the K4 option.The K4 option allows you to create an arbitrary frequency conversion.Example:If you want to make an S11 from 8 GHz to 300 kHz you have to make the following settings: Preset Change to S11 Start frequency = 300 kHz, stop frequency = 8 GHz In the Port Configuration, change

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

    I have a automatic calibration with 2 port but I want to do a 4 port calibration at my ZVA. Is that possible?Yes, 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 "Calibrate Ports" set the tick marks for port 3 and 4, then they are included into the calibrationSet

  • Calibrating a vector network analyzer (VNA) with different connectors on each port

    Do you have any solution for calibrating a vector network analyzer (VNA) with different connectors on each port?In my case, SMA and APC-7 connectors.To make a full two-port calibration with different connector types on each port, you use the UOSM calibration routine. U stands for Unknown Through.You need a calibration kit for the SMA, a calibration kit for the APC-7 and an adapter from the SMA to the

  • Sending a Remote Control Ccommand Internally

    I 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?Yes, 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 interface and push the Connect Now button Now you can write

  • License Keycode for VNAMUC is not accepted

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

  • Deactivation of Ports with remote commands

    I want to deactivate the measurment of unused ports to increase the speed. It can be done in the port configuration, but I have not found a corresponding remote command to do that.Is there a remote command to remove the "meas" flag for a certain port?There are two possibilities to deactivate the "Meas" function of a port:Perform a single port calibration. After the calibration is saved, the "meas"

  • Connect Generator via LAN

    Connecting the ZVA/ZVB with an external generator via the LAN interface to perform e.g. mixer measurements.It is mandatory to install at least a VISA driver runtime unit. The example below uses the ZVA24 and the SMF100A.The setup is similar for other instrument combinations. Please connect a mouse and a keyboard to the ZVA.Important: It is very important to select "Custom" during VISA library installation

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

    I 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?The resolution settings for both displays must be the same if you want the internal display andthe external monitor to be active at the same time.

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

    How can I calculate the mixed-mode S-parameter from an S4P-file?The 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 mode.The mixed- mode S-parameters in this matrix are as follows:

  • Mixer measurement: Conversion gain too low

    The 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?This 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 and signal generator use the same referencefrequency source

  • Calibration Unit and Remote Calibration

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

  • Connection of an external Monitor to ZVA

    I have a new ZVA with Windows 7. When I connect a monitor it remains black.What do I have to do?Go to the desktop of Windows and do a "right click"Graphics Options --> Output to--> now select the external monitorVERY IMPORTANT:Before you disconnect the external monitor, do not select "Build in Display". It must be set to "Clone" or "Digital Display"If "Build in Display" is selected, the internal monitor

  • Calibration of two channels simultaneously with remote commands

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

    I 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?To use the ZVA/B with an external monitor and a resolution higher than 800 x 600 pixels, please proceed as follows:- Connect the external monitor to the ZVA/B- Connect a mouse to the ZVA/B- Switch on the device- Wait until the device

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

  • How to bisect the result in dB with Trace Mathematics

    I 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?In this context, we have to keep in mind that the following applies:log(x) / 2 = log( x ^ 0.5)When we take

  • German keyboard driver

    How to activate a German keyboard driver on the ZVAB ?As 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 driver.To switch back to the previous

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

    There 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?The DC inputs make it possible to measure and display DC voltages or the power added efficiency (PAE)* of anactive two-port DUT. One connector can handle voltages from –1 V to +1 V, and the other from –10 V to +10 V. Pin number Name Direction

  • All four S-parameter remote set up

    How can we do a remote setup of the screen for all four S-parameters?This 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?;------------------------------; set screen for S11ZVB: CALCulate1:PARameter

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

    Could you tell me how to convert the real and imaginary numbers to magnitude in dB and phase in degrees?The 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)

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

    I 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?With the standard settings, the VNA measures some points, then it updates a part of the display, measures some more points

  • Improve the calibration procedure for different setups

    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?You can use a segmented sweep.Define one sweep segment for each setup. The frequency ranges of the

  • Restore the Auto Logon Configuration

    Because of a LAN operation I changed the logon name. Now I have changed it back to 'instrument' but I still get a logon window for the password at every boot-up . How can I restore the normal auto logon configuration?In WINDOWS, please click START and RUN (opens 'regedit') and then OK.In the tree on the left-hand side, choose the following:HKEY_LOCAL_MACHINEthen softwarethen Microsoftthen WINDOWS NTthen

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

    How can I switch from remote to local state via remote control?Using 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 GPIB driver, you need the GTL command.

  • How can I delete Cal Kit Data?

    I 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?Yes, 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 any longerVery important:Now execute a "Reset

  • What is the function of "Resolve pool link" in the calibration manager?

    What is the function of "Resolve pool link" in the calibration manager?If you apply a calibration from the calibration pool to a channel, it is still coupled to the calibration data in the calibration pool.This means that if you change the calibration data in the channel with, for example, 'Repeat Previous Calibration', you also change the calibration data in the calibration pool.If you 'Resolve pool

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

    When 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?Yes this is a bit confusing.Port 1 does not mean Port 1 on the VNA. It means the first port and here

  • Averaged single sweep

    I 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.You 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 factor of 10.

  • TRL calibration - middle of line or end of line

    I know from VNA of other companies that it is possible to select "middle of line" and "end of line" for the reference plan.Where is the reference plan of VNAs from Rohde & Schwarz?The reference plan is "middle of line", see attached drawing:

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