Network analyzer

I am using GPIB-USB-HS to read the s parameters from E8361A network analyzer. I downloaded the instrument driver and ran the examples "catalog measurement" and no matter which s parameter I am measuring by network analyzer, when I clicked "run" in front panel, it went back to S11 in network analyzer and the front panel shows the measurement parameter is S11. I also tried to use the example "config and read". I am able to read S11 data correctly but I could not read other s parameters (S21, S22, S12). I tried to change the measurement type from 0 (s11) to 1 (s12) but then I could not run it. There is an AGPNA error query; requested measurement not found". Can anyone help me with it?

Hi yll,
Which version of LabVIEW and NI-VISA and NI-488.2 are you using? If you don't have these drivers, you can download them here. I look forward to hearing from you soon.
Regards,
Todd V.
National Instruments
Applications Engineer
NI Prototyping Community

Similar Messages

How long does it take to write data from network analyzer

I am using LabVIEW to control two DC power supplies through GPIB-USB and I have a DAQ-6008 generating 8-bit digital output. I am connecting two DC power supplies and the 8-bit digital signal to my circuit and want to measure s parameters (all S11, S12, S21, S22) and write their magnitude and phase to a .txt file in my laptop. It worked but took about 1.5 minutes to write data (magnitude and phase of four s parameters) for a fixed DAQ output and fixed DC voltage by only sweeping 6 points. Is it a reasonable time? Because eventually I will have more than ten thousand combinations and need to record s parameters for all these combinations and it will take too long. I would like to know which part spends more time or how I can reduce the time to write four s parameters. Thanks a lot.
Attachments:
Agilent E3631 Output 2 DC Volts_for loop.vi ‏22 KB
Agilent PNA Series Config And Read Data_test(4).vi ‏32 KB
Main(2).vi ‏30 KB

Hello yll,
-So you mean I should delete some of the controls
in the front panel and make them a fixed value or default in the block
diagram to reduce the front panel controls
What Dennis is saying is that your front panel controls are only read once by your program. The are read at the beginning and the value is passed into the while loop. This is the value that will be used, even if you change the front panel. You can verify this by using highlight execution.
-What does it mean that I am
resetting the instrument each time?
Everytime you call the initialize VI, you send a command for the instrument to reset. This is not necessary, since you want your settings to remain for the entire program. You can reset it when you "first" start using it, but as your program keeps going, you do not need to reset it.
-Do I need the initialize VI and
close VI in every iteration or I should have them out of the loops so
all the instrument are initialized and closed only once throughout the
entire process?
That is exactly what you should do.
-For the network analyzer, when you said I only need the
VIs from initialize.vi to read data.vi (the second one from the end),
do you mean that I can delete the close.vi? and why does it make the
program faster?
You should probably add the close outside the loop, as good practise. I would still put the initialize outside the loop.
I hope this helps.
O. Proulx
National Instruments
www.ni.com/support

I need free network analyzer software for my mac. we are trying to monitor what software may be running which is causing our internet to fail, although the internet is still coming into our modem.what is recommended?

My internet keeps 'tripping' at or around the same period time each day. We have already replaced our modem from our internet provider and we bought a new airport extreme router. We do not believe these were the cause, although we have now ruled them out as a cause. Everytime the internet fails, our internet provider company tells us that there is still plenty of signal coming into our house. There is something going on inside we believe, and a technician set up our Network Utility to run a continuous ping test to capture information about when it 'trips' againn. Yesterday, it happened again, and when he checked the data out, he said he is sure there is something 'running in the background' on my IMac. He advised me to download a free Network Analyzer so he could further investigate what is was that was causing the problem, so I need a free network analyzer software for my Mac. The issue has been going on for a long time, so it is not the new operating system, Lion. This morning, we changed the radio channel from 'auto' to 'manual' and set a new channel, hoping that might help. We are trying to find out what program may be running (even a tiny one in the background) which is causing our internet to fail, although the internet is still coming into our modem. What is free downloadable product is recommended?

Will Activity Monitor and/or Network Utility, both already in the Utilities folder on your Mac, help in trying to diagnose the problem.
If you are connecting via wifi what encryption are you using? If you're using the Exteme I doubt that you are using WEP, but worth checking as it seems Macs don't like it and work better using WPA.

Instrument driver for Agilent E5061A network analyzer

Is there a instrument driver for the Agilent E5061A network analyzer ? I couldn't find one neither on NIs Instrument Driver Network nor on Agilents site.
We are using Labwindows/CVI as development system.

Yes we are talking about the same driver, but i dont know why hp871x.c file was removed. However, hp871x.h and hp871x.fp are included.
Anyhow, look this comment into hp871x.cpp file:
In addition, if WIN32 is defined, _CVI_ may also be defined to indicate that the program is being compiled under LabWindows CVI.....
I guess it is not so hard to modify this source code (from hp871x.cpp to hp871x.c). Sorry for disturb you!!!
"Only a life lived in the service to others is worth living..." - Albert Einstein

How to plot modulus and/or phase of S21 parameter by using Network Analyzer?

Hi, I'm using Network Analyzer Rohde Schwarz ZVB 8 (untill 8GHz) and I have to do same manipulation on Modulus and Phase of S parameters. I control the Network Analyzer by PC and if I'm in front of the Network it is really easy to do operations by looking real instrument display.
Is there some EASY way to show the real monitor on the PC desktop in order to do the operations in an other room?
Thanks,
Luana.
< The Quiter You Become, The More You Are Able To Hear >

SweetLuana wrote:
Thanks juergenstraub,
but I was searching the way to have a "copy" of real display in the LabVIEW Panel.
Thanks for the advice, but is not was I'm asking.
No easy way I can think of. The main problem is real time screen updates. If you didn't care about that, you could make a virtual button for each real button you are likely to use, then do manually triggered sweeps.
Personally, I don't usually like the idea of remotely controlling a test setup because you aren't there in front of it.
What if the unit shorts out and by the time you get there, it's just a slag heap? A several thousand dollar slag heap? (Worst case, the only way you might know it became a slag heap is because you suddenly have no gain and some runs into the room complaining that your unit is smoking.)
What happens if you need to switch cables in and out all the time (i.e., have to check several ports for S22)?
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

How do I interface a computer to the HP8753D Network Analyzer (NA) via a GPIB cable using Labview?

Hi,
I am a new beginner to LabVIEW. Right now, I am trying to acquire data from the HP8753D Vector Network Analyzer (VNA). However, I don't think I even managed to get past the first step.
I tried to create a simple VI with only a single READ GPIB and a WRITE GPIB both to the address 16 (default for HP8753D) with the command IDN?;. I output the result from the READ GPIB to the a string indicator but the front panel displayed boxes and unrecgonized characters.
The NA didn't even showed that it was communicating to the computer at all (No LED lit up).
I have also varied the byte size from 200 to 2000 but I still did not get the res
ult.
I really need help on how to interface the VNA and my computer together. I have a strong feeling that the VI I constructed is too simplified (attachment below). If you know the solution, please help. I really would like to get past this first stage of first getting the computer and the device to communicate first.
Thank you.
Attachments:
LabVIEW_VI.gif ‏4 KB

Hello,
There are several things to check. First make sure that you are using the correct GPIB or VISA resource name. If you are using GPIB the name that you use should be something similar to:
GPIB0::2::INSTR where 2 is the primary address and 0 is the device number.
Then you need also to check which commands are accepted by your device. It is a good idea to start in MAX (Measurement and Automation Explorer) by right clicking in the device.
Another thing you might want to try is to download the driver the instrument driver for this HP8753D that you have.
You can find it in the following address:
hp8753D Instrument Driver
H
ope this helps
Ricardo S.
National Instruments
Message Edited by Support on 12-08-2006 01:36 PM

Looking for HP8720C Network Analyzer Drivers

Also I am new to Labview, what would be a better option, to write in Labview or Visual Basic

Hi,
Do you mean: "8720C Microwave Network Analyzer"?
It looks like you have to use the driver for the HP8753 (apparently the same)
If so, follow this link for the drivers:
http://zone.ni.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/99fd4a9bfc561ba7862568ab005fbb48?OpenDocument
The better option is LabView. Well... That's really a matter of personal preference ;o)
-JLV-

Extracting .s2p files from 8722A Network Analyzer?

Hi,
I wish to extract .s2p files from my HP 8722A Network Analyzer.
I could not find a driver for it. It is connected to my computer over GPIB.
I am quite new to this, so if anyone could explain the overall process to extract .s2p files from a network Analyzer, that would be much appreciated.
I imagine that one takes a measurement, stores it under a certain filename, then a command retrieves it and sends it to the computer?
Thank you so much,
Nicolas
Solved!
Go to Solution.

Nicolas,
Instead of extracting the .s2p files, which because of the age of the device (manual I found said 1991), could be very difficult, I think we would be better served communicating with the device directly and not using the files it creates. Instead of the process you described, we could set it to take a measurement, send the measurement to the computer, and have the computer do any manipulation/saving it may need.
This manual discusses the basics of communication over GPIB with that device in chapter 12:
http://cp.literature.agilent.com/litweb/pdf/08720-90135.pdf
GPIB communication is typically pretty simple. The computer will just send the device in question the command or series of commands then wait for the response back, much like the GPIB examples in labview (Example finder>>Hardware IO>>GPIB).
Unfortunately for us, the Agilent website here:
http://www.home.agilent.com/agilent/product.jspx?cc=US&lc=eng&ckey=8722A:epsgro&nid=-536900197.53690...
only has the operating and service manuals, and not the programming reference manual. You may want to contact agilent to get the programming reference manual, as that will list all of the commands you need to send the device.
Regards,
Kyle Mozdzyn
Applications Engineering
National Instruments
Regards,
Kyle M.
Applications Engineering
National Instruments

2 Network Analyzer over a single GPIB-Enet

I've some trouble using a single GPIB-Enet interface to control two different Network Analyzer simultaneously. It looks like to be not possible (commands are sent to both the instruments even if they have different gpib addresses!). I'm trying to do this with Labview 6.1 under Windows XP. The goal is to make two different measurements and collect data on two different PCs at the same time. Thanks a lot.

This should be possible for you to do. Many GPIB-based applications do this type of thing. Here's what I imagine you would do to get this sort of thing setup.
1. Send data to instument A and instrument B to get them setup to take a measurement. While doing this, you can usually get them setup to start the measurement when you send a Group Execute Trigger (GET) command on the bus.
2. Send the group execute trigger. Note, because you're using two instruments here, you may want to use the TriggerList vi to trigger more than one instrument.
3. Read data from the two instruments.
While you won't actually be sending the data across the bus fully simultaneously, it should be sufficient for your needs. I'd recommend using the 488.2 style vi's in
LabVIEW, as these may be safer for avoiding re-addressing problems that you could run into if you were using all board-level calls.

Where can I find a free wi-fi network analyzer for an iPad?

where can I find a free wi-fi network analyzer for an iPad?

I doubt that you'll find anything worthwhile that will be free. Writing a network analyzer is not easy nor simple, if anything truly useful is even possible on an iPad since Apple reportedly disallows apps that do a signal scan, so it's doubtful that anyone would go to that much effort and not want to make money from it. But perhaps someone else here will have a useful suggestion for a specific app. It will probably help if you'll post what specific features or functions you need.
Regards.

Download .jpg image from Network Analyzer 8722es to PC

I Have an Agilent 8722ES network Analyzer and I need to get the image, to save it with the test report.
I can get the data and put in in a graphic but I prefer to put the real image as the Network Analyzer diplay, inlcuding the Markers, real frequency, colors, settings, etc.
the Network Analyzer is capable to save the image as .jpg using the integrated 3.5' disk drive, but I need to save in real time the result and the picture.
Do any body has an aplication than can help me with this? I tried to find something over net and in the Programming manual , but I can't find any.
Thank you for your help guys...

Imontoya
I took a look at the manual for the 8722ES and as you stated the only way to get a jpeg file is to save it to floppy.
From here I can see two options
1. Call Agilent support and see if there is a VISA command to save the image. If there is a VISA command we can call it from LabVIEW.
2. Use the Instrument Driver to import the raw data and create your own display in LabVIEW that looks like you want. You can then you can take a screenshot and do whatever you want with it.

Labview GPIB-USB-HS and Network Analyzer

Hi, I have a quick question; I am currently working with an older Vector Network Analyzer and Labview for controlling antenna array measurements. Currently, we have two Labview VI's that work independently, but we would like to combine them into one to further automate our process. What I am having trouble with is writting to the VNA with the two VI's combined. I have copied the working VI and have setup the same control logic for it in the combined module as it has in the working VI, but it does not seem to work when added with the other .VI.
I am new to Labview, so it is probably a simple error, but if someone could look over what I'll attach and see if there is a solution, I would greatly appreciate it! Currently, in the combined module, there are no errors, and the first part, writing the sequence to the parallel port works, but that writing to the parallel port does not seem to trigger the VNA to become active and write the data. I can provide more details if necessary, but here are the files. The calib1.VI is required to run the VNA_Try, but nothing needs to be changed there; the VNA_Switch_Combine is the one that is not currently working.
Thank you for your help!
Attachments:
VNA_Switch_Combine.vi ‏49 KB
VNA_TRY7.vi ‏27 KB
calib1.vi ‏29 KB

Now I was able to get the program working, but while it was running yesterday, it stopped in the middle of an experiment, and I have not been able to get it to work again.
The error that I am receiving is the following:
VISA: The connection for the given session has been lost.
Previously, when I received this error, I would try a combination of restarting the computer and re-calibrating the VNA, and this would fix it. Now, however, it has been almost two days that I have not been able to get this to work. I have tried using NI MAX to detect the instrument, and sometimes it does detect it, but when it does, I still get the same error. There are other times when NI MAX does not detect the GPIB controller, but there does not seem to be a consistent reason as to why the GPIB device is or is not detected by NI MAX.
What could have gone wrong? The code remained the same, and has not changed since it worked.
Thank you.

How to program Agilent E5071C network analyzer with USB connection

Hello,
I am trying to program the Agilent E5071C Network Analyzer in Labview. I'm going to have it connected through USB, I don't know where to begin. I have the Drivers installed from the NI website, but i don't know where to go from there.
Thank You

duplicate post

Network Analyzer labview program

I have a network analyzer E5071C agilent. I'm writing a program that will measure the magnitude and frequency. Right now if you check my attachement you can see what I have accomplished. I'm trying to adjust this program so it can just measure the magnitude and phase vs. frequency at a ceratin location and so it takes one measurement at a time. If someone can point me in the right direction i would appreciate it.
Thank You
Attachments:
Hopefully it will work.vi ‏26 KB
Block Diagram1.JPG ‏60 KB
Front panel1.JPG ‏27 KB

arthur51189 wrote:
The grid is what we are going to build and attach to the network analyzer. Basically, it goes to a ceratin location on that grid and reads the magnitude and phase vs. frequency. i don't think it's the fullset of points I think we just want one point at each of those locations.
If you're just taking one reading at a specific point in some grid then why would you use a network analyzer? You also said "I don't think", which to me seems to imply that you're not quite sure what it is that you're trying to measure.
I don't really understand what modularity is. Also, am I going to have to make many changes to my existing program to accomplish the task?
Would you possibly be able to point me in the right direction because I am having a hard time starting
You've already seen modularity in the driver you downloaded. The individual VIs are the modular code. You can use them in more than one place. That's a fundamental programming concept. To learn more about LabVIEW it is recommended that you go through the tutorial(s) and look over the material in the NI Developer Zone's Learning Center which provides links to other materials and other tutorials. You can also take the online courses for free.

Free Network Analyzer?

I have a MacBook Pro running OS X 10.6.8 and am looking for a network analyzer equivalent to Microsoft's Network Monitor. This is surprisingly much more useful on a Window's machine compared to Wireshark. I also don't like Wireshark on OS X and was hoping there is a better freeware out there.

Have you tried iNet (available at the App Store)? Not exactly sure what Network Monitor does, but I think that iNet, at $5.99 does a pretty good job and it has a nice GUI.
Clinton

Network analyzer

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