NiUSRP Configure Signal.vi not allowed inside loops?

It seems that niUSRP Configure Signal.vi is not allowed in loops. After stopping the VI I get this message:
niUSRP Configure Signal.vi<ERR>This attribute cannot be modified while the driver is in the Running state.
Is there a way to change the carrier frequency while the driver is running? Using the niUSRP Property Node.vi to set a new frequency within a loop is also not working. My goal is to create frequency hopping with the USRP.
Solved!
Go to Solution.
Attachments:
Simple Transmitter_inside loop.vi ‏20 KB
Simple Transmitter_outside loop.vi ‏19 KB

Hi YYY,
Thanks for including your VI in the post. I was able to download it and replicate what you are seeing. There are a few things that need to be changed in order to get this working.
First, you do not need to have the niUSRP Configure Signal.vi function inside of your while loop. You can put this outside the loop and use a property node to change the frequency with a property node. You have the property node in your code already, you just need to change it to write instead of read. There is an example that will do exactly this if you just want to use that instead of modifying your code too. It is called niUSRP EX Tx Continuous Async Reconfig on the Fly.vi.
Next, the reason that you are not able to go at the 1MS/s IQ rate with the code you have is because you are trying to read and write the frequency during every loop iteration. Due to the time to query the hardware, set the frequency, and read the frequency back, the max IQ rate I was able to get was around 500kS/s. This is due to a combination of hardware and driver limitations. Even with the example listed above that uses the property node instead of the configuration function, if I put in an indicator to look at the carrier frequency I cannot use a faster IQ rate.
Try changing to the property node and removing this indicator, you should have a lot more success. Let me know if that doesn't work for you or if you have any other questions, I'd be happy to help.
Sarah Y
SDR Product Manager
National Instruments | Ettus Research

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12. I got home, rebooted everything and no AP utility won't pick either of them up (amber flasing on both Airport Express devices, green light on the Airport Extreme)
13. In desperation I plugged int he Aiport Express devices into the the Airport Extreme ethernet ports and both showed up in the AP Utility.
14. However, everytime I try and configure the Airport Express devices (while plugged into the Airport Extreme) I keep getting a message saying
An error occurreed while trying to access the Appled wireless device. Mkae sure your network connection is valid and try again
Erro -6753
Any thoughts before I take everything back and get a ham radio?

FYI - My external hard drive is formatted to a Mac and my iMac is backing to to it fine. However, everytime I try to select the backup drive on my MacBook Pro, the only option is "other Time Capsule". Airport Utility is not allowing me to access the external hard drive. Anyone...please help! Thanks in advance.

I have set up our school ipads to be supervised by Apple Configurator and am using VPP to buy apps. I now find the supervised ipads do not allow the pupils to download photos or movies etc. Any suggestions would be great please.

I have set up our school ipads to be supervised by Apple Configurator and am using VPP to buy apps. I did this initially as our school internet connection was stopping us from being able to update the IOS and our County was offering a managed system, Lightspeed, which took control of every device in school which proved very expensive. I now find the supervised ipads do not allow the pupils to download photos or movies etc. As we frequently use the ipads as cameras this is causing us a problem. We have a school imac that I use to keep the devices updated with Apple Configurator (not connected to our network), and this doesn't seem to offer any solution to download them either. I was told there was a setting in Apple Configurator to allow other computers to download from supervised devices, but I can't see it anywhere. I am very new to this so any advice or help would be greatly appreciated please.

I assume you are wanting to take the photos and movies off the iPads?
Connect the iPad to a Apple computer. Open "Image Capture". Any photos or video can me imported to the desktop or other location on your computer.
I had this same problem last year and as we have no wifi I asked lots of people at Apple what I could do - no one provided this answer (a little unbelievable!). If you have wifi using something like dropbox would be an easier solution.
Hope this helps

I'm trying to use a madcatz controller on the mac but it turns on for 2 seconds and turns off. the system profiler picks it up as a xbox 360 gamepad but says its not been configured. how can i allow my self use this with my games.

i'm trying to use a madcatz controller on the mac but it turns on for 2 seconds and turns off. the system profiler picks it up as a xbox 360 gamepad but says its not been configured. how can i allow my self use this with my games!

I have exactly the same problem.
I'm a little peed-off with Microsoft on this. The original wireless controller I have doesn't work either since the cable I'm using is 'just' the charge and play cable, so a direct connection to my Mac won't work with this cable. It's a cable for god's sake. Why on EARTH put any limitations on this!?!?
Next I learn I need an additional USB wireless receiver from Microsoft to get my original 360 controller to talk to my Mac. As I certainly don't want to fork any more microsoft dollars on this, this is not an option.
Next I think, yes! I have a MadCatz 360 wired USB controller. This should surely do the trick just plugging it in and the way I go. But oh no, for some reason I plug my MadCatz Xbox360 controller in, it flashes a few times then switches off and can't be turned on again.
The System Profiles recognizes it as a MadCatz 360 device controller but that is about it, but the ontroller software I download for the System Prefs (360Controller, USBOverdrive etc) don't even recognize the controller as being plugged in.
What the **** Is The Microsoft Deal with all of this!?!?
PS: Oh, and I forgot to mention, there are No drivers for device 4716 that I can find on the MadCatz website, or am I going blind?
If anyone has a link, it would be appreciated.
Message was edited by: nostrawaggus

Browser is not allowing sign in to excite web page. it says my settings are configured to disable cookies and/or javascript. please help

i just got firefox 4.0, and i tried to simply sign in to myexcite.com, but instead the message "the browser you're using is not allowing you to sign in to Excite. Right now , your browser's settings are configured to disable cookies and/or javascript..."
Please Help. I am new to Firefox 4.0

First, create a specific [[Managing profiles|profile]] for Firefox 4.0b8 to prevent interferences between current (Firefox 3.6) and beta (Firefox 4.0b8) versions.
Then, see [[Cannot log in to websites]].

/BaseState /OFF not allowed in default "/D" OC configuration dict. Why?

What is the logic behind this rule imposed by the PDF Spec? It makes absolutely sense to have OCGs in a document made invisible by default, and only a few, selected ones made visible by referencing them in the /ON array. BTW, although not allowed, the /BaseState /OFF plus /ON [...] combination is perfectly acknowledged by AdobeReader.

It seems that the ISO is less restrictive than the precedent PDF-Specs up to v. 1.7.
ISO 32000-1:2008, Table 101, Page 229: "If BaseState is present in the document’s default configuration
dictionary, its value shall be ON."
PDF-Reference, 6th edition (PDF-1.7), Table 4.51, Page 376: "Note: If BaseState is present in the document’s default configuration dictionary, its value must be ON."
Ghostscript with epswrite output device produces a warning when it encounters /BaseState /OFF in the input PDF file:
Warning: Default viewing OC config dictionary has /BaseState /OFF
This file had errors that were repaired or ignored.

Reason for not allowing static declarations inside an inner class

Is the reason for not allowing static declarations inside an inner class is due to the fact that it can never be accessed at a class level as the outer class has to create an instance of the inner class and any attributes/methods of the inner class has to be accessed through that.
Typically, an instance (non-static) variable can never be accessed in a statement or expression inside a static context but the class variable can be accessed inside a non-static context. Given this, shouldnt the static declarations be allowed inside an inner class?
Correct me if my understanding is wrong.
Thanks

I still couldnt get it clearly. Why i cant i have a static value ( variable ) for all the instances of the inner class irrespective of its enclosing instances of it ( i.e outer class instances). Say in this example below,
class Outer
static int i = 0;
public Inner inner = new Inner();
class Inner // inner class ( non-static nested class )
int j = 0;
static final int k = 2; // compile time constants are allowed
// ininner class
public void m1()
j++;
System.out.println("j is " + j);
i++
System.out.println("i is " + i);
public static void main(String[] arg)
Outer outer1 = new Outer();
outer1.inner.m1(); // j will be 1 & i will be 1
Outer outer2 = new Outer();
outer2.inner.m1() // j will be 1 again & i will be 2. But I would
// want j to be 2. Why is this not allowed?
Looks like something missing..

System configuration will not allow reader to open in Protected Mode?

Suddenly system configuration will not allow Adobe Reader to open in Protected Mode. What do I reset?

I just don't know exactly what I am looking for.
If you only have one trace it helps to have a hypothesis to test. Otherwise if you have two which are essentially the same except for one significant difference, as I mentioned you should be able to filter coarsely, spot a divergence and then investigate
the cause of it. In a general scenario I imagine you would only have Process & Thread as a coarse filter, e.g. see the dispatching of tasks and threads and the loading of their modules. However, for your case, it may be sufficient to compare
Network events, spot a divergence in that sequence and then dive in to see what more differences there were which caused it.
Good luck
Robert Aldwinckle

Windows Update not allowing me to configure

Hello all!
I was told to post here after talking to some people in one of the other forums, so I will link to that thread with the information already discussed!
http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_update/windows-update-not-allowing-me-to-configure/8be97ddf-52f1-4944-8761-aaf96fba7a91
Any help is appreciated!

Hello Edward Cyngier,
Do you mean that you can’t choose the important update to install? Please share us a screenshot.
Is this computer domain-joined?
In the start search box, type gpedit.msc and press enter.
Navigate to Computer Configuration-> Administrative Templates -> Windows Component -> Windows Update. Make sure the states of all setting are Not Configured.
Navigate to Computer Configuration-> Administrative Templates-> System-> Internet Communication Management-> Internet Communication settings. Make sure the state of “Turn off access to all Windows Update features” is Not Configured
Please download and install the System update readiness tool for Windows 7.
https://www.microsoft.com/en-hk/download/details.aspx?id=20858
Best regards,
Fangzhou CHEN
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]

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