Apparent cross-talk that is caused by software

I have several channels setup that test out find in MAX. When I acquire data on several channels(continuous acquisition to spreadsheet.vi), the signal for one of the channels appears noisy and the average is incorrect. If I acquire only one channel, the signal appears clean and is teh correct value. NO HARDWARE CHANGES during this process. I have tried differential, single referenced, and differential but still grounded and get the same kind of results. I am using a laptop card (AI-16X-50) with a SCB-68 accessory board which is grounded. Labview 7 with the latest MAX and drivers support and Windows 2k.
Thanks

This was posted in the NINews I recieved this AM.
6. My Laptop Reads a Floating Voltage from a Grounded Source
Laptop computers performing measurements can create a floating situation
similar to using a floating source. This article discusses measures you
can take to make sure your readings are accurate.
http://digital.ni.com/express.nsf/bycode/nn0104b21
That may help witht the noise on the channel.
Otherwise;
Is the device driven by that channel a high impeadance device?
Ben
Ben Rayner
Certified LabVIEW Developer
www.DSAutomation.com
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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Go step by step and test.
1. Start up in Safe Mode.
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Since I updated Firefox (around 3/8/11) I have had issues with logging in to my Comcast email. Comcast says that it is a software incompatibility, perhaps Firefox.

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Clear the cache and the cookies from sites that cause problems.
* "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
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HT1212 How do i restore my iphone when it has been disabled and can not be restored through itunes because of the error message that says "The iphone software update server could not be contacted.

How do i restore my iphone when it has been disabled and cannot be restored through itunes because of the error message that says "The iphone software update server could not be contacted

Have you jailbroken this device? This will make the iPhone not talk to the Software Update Server (that signs and accepts software updates) please refer to the following link? Error 3194, Error 17, or "This device isn't eligible for the requested build"
The iPhone will talk to the software update servers, just need to change the host files, it's a simple process, sorry if you were confused about the wording in to top?

RE: local variable cross-talk?

Jeff
A global can be considered as a variable to the entire code, where lots of
different vi's can operate it. Locals only have any meaning within their
own vi, or instances of their own vi.
If anything writes to a particular global, whether in reenterent vi's or
not, it's available everywhere in the code.
What you were asking was about locals though. If a vi is non-renentrant
(i.e. as they come out of the box) then the values in the locals are vi
specific, no matter where the vi is, where it was last used, it retains the
data from it's last operation. If it is re-entrant, then the values in the
locals for each occurance of the vi are its own for EACH instance, i.e. just
like different locals in different vi's, it doesn't matter where else the vi
is used, the data held is that from the last operation of that specific
instance.
Simple way to demonstrate this. Make a vi that has one numeric control,
then code in +1 and get it to write to a local variable for that control.
Throw in an indicator to wire out the result of what is written to the local
for the control.
Then take this vi, put it in a for loop, then put another copy in the for
loop as well. Wire the indicators to the side of the for loop and create
indicator arrays for them. Get the loop to run 6 times say. Now try
running this with the vi in the for loop non-reentrant and then reenterrant.
One way the arrays will contain either all the odd no.s 1,3,5,7,9,11 and
then the other array 2,4,6,8,10,12 (don't know which array will be which,
depends which executes first in the for loop of this example). The other
way they will both be 1,2,3,4,5,6. In the first example, the same vi has
run 12 times, i.e. one copy of the vi which retains its info and is called
in many places and therefore only has one set of values, and the other with
two re-enterant copies where they have their information specific to that
instance of them i.e. effectively they are different vi's. Both ways are
useful, depends what you want.
If you're looking for a use for non-reenterant vi's then consider this:-
For instance. Supposing you get many things to try to write to a global
array of numbers, and you have two vi's one "A" writes to the first element
in the array and the other "B" writes to the second element. Because in LV
you have to read a global first and then write to it to perform a change,
these independant vi's "A" and "B" (be they re-enterant versions of the same
vi, or different vi's), can be performing the tasks simultaneously in the
code. I.e. "A" reads, "B" reads, "A" writes, and "B" writes over the top
with a modified version of what it read, and "A"'s changes are lost. This
is what's known as a "race condition" as "A" hadn't finished and "B" needed
to know what "A" was going to write before "B" performed "A" read. Try it,
hours of fun if you code this kind of thing in inadvertantly!
If the same vi is used, and is not re enterant, it can only run in one
instance at a time, hence two read / write operations cannot be performed
together, problem solved. Unless that gives you timing issues of course,
waiting for one to finish, to write the other......but that's another whole
can of worms.
cheers
Tim Price
This e-mail, its content and any files transmitted with it are intended
solely for the addressee(s) and are confidential and may be legally
privileged. Access by any other party is unauthorised without the express
prior written permission of the sender. If you have received this e-mail in
error you may not copy, disclose to any third party or use the contents,
attachments or information in any way.
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Jeffrey W Percival
Sent: 29 November 2001 21:12
To: [email protected]
Subject: Re: local variable cross-talk?
Another useful reply! What a great news group this is.
One last thing I wanted to ask about, though, is global vs. local. I see
you talk about globals, but in fact the variables in my subVI's were locals.
I can easily understand the behavior I observed accompanying the use of
global variables, But I guess the use of the word "local" stumped me.
Should I interpret "local" in LabVIEW's sense to mean "local to all
instances of this VI"? And global to mean "visible to all instances of this
VI as well as other VI's"?
-Jeff
Tim Price wrote:
This facility is actually very useful, for instances where you want to
encapsulate some code so that it can only run in one place at a time,
i.e.
global arrays that are written to in more than one place. This method
can
eradicate race conditions completely for example when used like this.
There
are multiple other uses as well.
However, using a vi as a module of code, to run in more than one
instance at
a time simultaneously, re-entrant is the way to go. Just make sure you
debug it first!!!
Remember though, just because a vi may be re-eneterant, doesn't mean
that
everything inside is; sub-vi's, Globals etc. The classic one I've seen
is
where people think that a re-enterant vi is talking to it's own copy of
any
Globals used within it, i.e. counters etc., where in actual fact of
course,
they are all using the same Globals.
Worth playing with a few examples to get familiar with it.
Tim Price
Jeffrey W Percival, Senior Scientist and Associate Director
Space Astronomy Laboratory, University of Wisconsin - Madison
1150 University Ave, Madison, WI 53706 USA
608-262-8686 (fax 608-263-0361) [email protected]
http://www.sal.wisc.edu/~jwp

Tim Price wrote:
Tim, thanks very much. I'll try the experiment you suggest.
Thanks for taking the time.
-Jeff
Jeffrey W Percival, Senior Scientist and Associate Director
Space Astronomy Laboratory, University of Wisconsin - Madison
1150 University Ave, Madison, WI 53706 USA
608-262-8686 (fax 608-263-0361) [email protected] http://www.sal.wisc.edu/~jwp

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What causes post software installation stall and how can I avoid it?

I never had this problem before with Jaguar, but since I installed Tiger this past December, when I've installed some software updates, my computer has not been restarting normally when I followed the instruction to "restart".
It shuts down, there's the pause, then the chime sounds. The screen lights up and the spinning beach ball appears. So far, so good. That, however, is as far as the process gets. The beach ball just spins and spins and spins. I was patient, but waited to no end. Finally, I disconnected the power cord and let the battery run down.
Finally the screen went dark. I let the computer stay like that overnight. The next day, I reconnected the power cord, the chime sounded and the
computer started up successfully and worked normally. And the software was installed. This has happened three times, every time with a software update.
I have repaired the permissions and done other disk first aid from my install disk CD. And I've run the Tech Tool utility.
I don't know if any of that will address the problem. So I hope some one can give
me some idea what the problem is and what will permanently eliminate it, before I venture into any future software updates.
Thanks

It is normal for a restart after an update or software installation to take much longer than normal, and generally it should be left to do its thing - but not overnight!
There are no guarantees, but following this procedure when installing updates and upgrades on your Mac will go a long way towards avoiding unpleasant after effects and ‘post-update stress disorder’.
It is also worth noting that it is an extreme rarity for updates to cause upsets to your system, but they may well reveal pre-existing ones, particularly those of which you may have been unaware. If you are actually aware of any glitches, make sure they are fixed before proceeding further.
So before you do anything else:
If you can, make a full backup first.
Turn off sleep mode for both screen and hard disk.
Disconnect all peripherals except your keyboard and mouse.
1. Repair Permissions (in Disk Utility)
2. Verify the state of your hard disk using Disk Utility. If any faults are reported, restart from your install disk (holding down the C key), go to Disk Utility, and repair your startup disk. Restart again to get back to your startup disk.
At least you can now be reasonably certain that your system does not contain any obvious faults that might cause an update/upgrade to fail.
3. Download the correct version of the COMBO update from the Apple download site. If your car runs on gasoline you would not want to fill the tank with diesel, so don’t try to install the PPC updater on an Intel Mac!
If you prefer to download updates via Software Update in the Apple menu (which would ensure that the correct version for your Mac was being downloaded), it is not recommended to allow SU to install major (or even minor) updates automatically. Set Software Update to just download the updater without immediately installing it. There is always the possibility that the combined download and install (which can be a lengthy process) might be interrupted by a power outage or your cat walking across the keyboard, and an interrupted install will almost certainly cause havoc. Once it is downloaded, you can install at a time that suits you. You should make a backup copy of the updater on a CD in case you ever need a reinstall.
Using the Combo updater ensures that all system files changed since the original 10.4.0 are included, and any that may have been missed out or subsequently damaged will be repaired. The Delta updater, although a temptingly smaller download, only takes you from the previous version to the new one, i.e. for example from 10.4.9 to 10.4.10. Software Update will generally download the Delta updater only. The preferable Combo updater needs to be downloaded from Apple's download site.
Now proceed as follows:
4. Close all applications.
5. Unplug all peripherals except your keyboard and mouse.
6. Install the update/upgrade. Do not under any circumstances interrupt this procedure. Do not do anything else on your computer while it is installing. Be patient.
7. When it ask for a restart to complete the installation, click restart. This can take longer than normal, there are probably thousands of files to overwrite and place in the correct location. Do nothing while this is going on.
8. Once your Mac is awake, repair permissions again, and you should be good to go!
If your Mac seems slightly sluggish or ‘different’, perform a second restart. It can’t hurt and is sometimes efficacious!
9. Open a few of your most used applications and check that all is OK. In this connection please remember that not all manufacturers of third party applications and plug-ins, add-ons, haxies etc, will have had time to do any necessary rewrites to their software to make them 10.4.10. compliant. Give them a weeks or two while you regularly check their websites for updates. This applies particularly to plug-ins for Safari 3.
N.B. Do not attempt to install two different updates at the same time as each may have different routines and requirements. Follow the above recommendations for each update in turn.
Lastly, Apple's own article on the subject of Software Update may also be useful reading:
http://docs.info.apple.com/article.html?artnum=106695
If you are updating Safari (or just have):
Input Managers from third parties can do as much harm as good. They use a security loophole to reach right into your applications' code and change that code as the application starts up. If you have installed 10.4.11 and Safari is crashing, the very first thing to do is clear out your InputManagers folders (both in your own Library and in the top-level /Library), log out and log back in, and try again.
So, disable all third party add-ons before updating Safari, as they may not have been updated yet for the new version. Add them back one by one. If something goes awry, remove it again and check on the software manufacturer's website for news of an update to match your version of Safari. Remember: Tiger up to 10.4.10 used Safari 2.0.4 or, if you downloaded it, Safari 3.0.3 beta. Safari 10.4.11 uses Safari 3.0.4 which is not a beta. If Safari 3.0.4 on 10.4.11 is not the fastest browser you have ever used, then something is wrong!
Moreover, trying to revert to Safari 2 when running 10.4.11 can have repercussions, as Safari 3.0.4 uses a completely different webkit on which other applications like iChat, Mail and Dashboard Widgets etc also rely.
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Additional tips on software installation here:
http://docs.info.apple.com/article.html?artnum=106692

CROSS TALK - VIC FXO

Hi all,
I am facing the problem of cross call.
What happen is that,when someone is in a call and other people need to make a new call it dial to get voice tone, but it receive the cross talk (not the voice tone).
Someone known what could this?
The configuration is following:
voice-port 2/0
input gain 10
output attenuation 10
no vad
cptone BR
timeouts initial 4
timeouts call-disconnect 5
timeouts ringing 20
timeouts wait-release 5
timing sup-disconnect 1500
voice-port 2/1
input gain 10
output attenuation 10
no vad
cptone BR
timeouts initial 4
timeouts call-disconnect 5
timeouts ringing 20
timeouts wait-release 5
timing sup-disconnect 1500
Thanks

Please attach your entire running configurations. What version of IOS do you have? You may want to check CSCsg47594.

Cross talk in BNC 2090

Thanks for the information provided. I followed your advice by connecting
DGND1 with a wire to USER1 and DGND2 to USER2. But I still get cross talk.
It also puzzles with a fact that when I connect a signal source (from a
functional generator) to ACH1 but in fact the signals show up on the
Biobench screen as ACH0 as defined. So my hunch is that something wrong
happens to BNC 2090 or the PCI-MIO-16XE-50 board installed in the computer.
Would it be possible for me to send in the BNC2090 for a check? If so, what
are the procedures to follow.

We handle all repair requests over the phone. The procedure is as follows:
1. Go to www.ni.com/ask to create your own Service Request number (SR#). Choose the Phone NI option. Fill in the form with the appropriate information.
2. Call the support number that is given to you and enter in your SR#. You will be directed to an Applications Engineer (AE) that will assist you through the process. The AE will be able to answer any questions you may have about the repair process.
Have a great day.

My iPad Air always freezes during FaceTime calls using wifi. I switch to my iPhone 5c on the same wifi, and it never freezes while I'm sitting in the same location. Is there maybe a setting I have that is causes this? I am un to date on the OS also.

My iPad Air always freezes during FaceTime calls using wifi. I switch to my iPhone 5c on the same wifi, and it never freezes while I'm sitting in the same location. Is there maybe a setting I have that is causes this? I am up to date on the OS 7.1.1. Video and audio is froze on my end, only video freezes on the other end. It doesn't make a difference who makes the call either.

No, there isn't any setting that you are missing. Have you tried force closing FaceTime, and resetting your iPad?
In order to close FaceTime, you have to drag the app up from the multitasking display. Double tap the home button and you will see apps lined up going left to right across the screen. Swipe to get to the app that you want to close and then swipe "up" on the app preview thumbnail to close it.
Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider if it appears on the screen - let go of the buttons. Let the iPad start up.
If that does not make a difference, you could try resetting all settings, if you reset all settings you will have to enter all of the device preferences again in the settings app. That takes some time to accomplish, but you will not lose my data, media, apps or anything like that. Settings>General>Reset>Reset all settings.
If that doesn't help, the next step would be to restore the iOS software. Backup your iPad first, restore the iOS, then restore the backup.
Use iTunes to restore your iOS device to factory settings

I am having issues with 360 degree rotation, I have an iPhone 5 and ios 6.0.2. I have read alot about this issue online and I found out that my issue is software. I want to know if and when apple will fix this issue?

I am having issues with 360 degree rotation, I have an iPhone 5 and ios 6.0.2. I have read alot about this issue online and I found out that my issue is software. I want to know if and when apple will fix this issue?

I had the same experience with a new iPhone 5 that I bought last week. Did not have a chance to measure battery life before the 6.0.2 upgrade installed but I set up my phone exactly like my 4S and immediately started running out of power after short periods. Went to Xmas get together with fully charged 5 and 4S. Heading home the iPhone 5 shut down for low battery and the 4S had 65% power. Both phones had two half phone calls on then and no data usage.
That night I fully charged the iPhone 5 and, without lighting it up, put it on my night table. Next morning I picked it up and looked at battery indicator and I had 42% charge with NO activity!
Tried it again next night and wound up with 37% charge. (Slept longer).
Today I called the carrier and reactivated the 4S. Took the 5 to Apple Store and they kindly gave me choice of new replacement phone or refund. I took the refund. Uniquely, the Apple Store said it was Verizon CDMA phones that were coming back.
The are other strings on this with temporary solutions, but from my experience with 7 firmware changes on an HTC 4G phone the problem will continue because the solution will be hardware caused. We are in the days where RTM means Rush to Market - not Release To Manufacturing.
I fear the only solution is to either wait for the next model (I did not notice a really major change in performance over the 4S in LTE heavy Seattle area) - or switch to another manufacturer.
It might be useful for these forums to indicate if you have a GSM or CDMA phone to see which have more problems.
Discouraged....

Can I delete a media cache file that has caused my backup program to fail?

There are 2 Adobe Premere files that are located under App Date, Media Cache files that are causing my backup program to fail. These files were created in August of 2010 and have been backed up successfully many times. However as of Dec 2011 the backup program has failed to complete and the problem has been traced to these two files. I have no idea what the files do but deleting them would be good if it isn't going to affect my Photoshop Elements or premere Elements or my picture files and their location. It appears that the files are tiny clips from music that I may have opened when creating a movie with music to go with the slides. The actual clip of music does not seem to appear in any of the movies I created, which is a bit baffeling. I'd appreciate any help on this. Thank you.

Hi,
Can you share the name and path of the files?
Are you talking about Mediadatabase.db3 file present at: application data\adobe\Photoshop Elements\10.0Locale\en_US? If yes, you can delete this file. When you launch Photoshop Elements the next time, this file will automatically get created for you.
Thanks

Socket cross-talk.... multiplex read buffer?

i am using only 1 socket:
[pc #1] <--- socket ---> [pc #2]
concurrently:
the [pc #1] thread is sending input data to the [pc #2] thread.
and
the [pc #2] thread is reading input data from the [pc #1] thread.
this is of course, ok
the [pc #2] thread is sending results data to the [pc #1] thread
and
the [pc #1] thread is reading results data from the [pc #2] thread
some times "cross-talk" depending on timing
[pc #2] will read the output it sent to [pc #1] as if it
were input from [pc #1]
maybe multiplex the read buffer?
how to do that?
other ideas?

i am using only 1 socket:
[pc #1] <--- socket ---> [pc #2]You are using two sockets, one at each end. You are using one connection.
concurrently:Bilaterally, or in full-duplex mode:
the [pc #1] thread is sending input data to the [pc #2] thread.No it's not, it's sending data to the connection.
and the [pc #2] thread is reading input data from the [pc #1] thread.No, it's reading data from the connection.
this is of course, okIt's OK once you describe it correctly.
the [pc #2] thread is sending results data to the [pc #1] thread and the [pc #1] thread is reading results data from the [pc #2] threadNo, see above.
some times "cross-talk" depending on timing
[pc #2] will read the output it sent to [pc #1] as if itwere input from [pc #1]
TCP/IP doesn't do that. Any 'crosstalk' is due to a programming error on your part.
maybe multiplex the read buffer?Maybe fix your code?
other ideas?Maybe show us your code here?

I have an iPad 1 that is currently showing software updated at version 5.1.1. Is it possible to update to iOS version 7 on this device? My goal is to get Garage Band on this device and the app store is telling me I need iOS version 7.

I have an iPad 1 that is currently showing software updated at version 5.1.1. Is it possible to update to iOS version 7 on this device? My goal is to get Garage Band on this device and the app store is telling me I need iOS version 7.

Hi,
If you really need to upgrade you can save a bit of money and get an older version than the ipad Air.
First, you can sell your ipad 1 to places like gazelle.com, cashforyourmac.com, sellyour mac.com, or many others out there. The sites I listed give you cash. At this point gazelle.com is giving $70.00 for any ipad 1 in 'good' condition. And cashforyourmac will give you $25.00 over what gazelle.com or sellyourmac.com offers you. Shipping is free.
Then, with that money, go the the Apple online certified refurbished store. As an example, a new 64gb Air costs $699.00. A refurbed 4th gen 64gb costs $529.00 and a 3rd gen 64gb costs $499.00. Personally, I'd skip the 3rd gen. So if you buy a 4th gen 64gb at $529.00 minus what you can get from a sale to above, you can get an ipad 4 64gb for just over $430.00, a savings of savings of about $270.00. (A new 32gb Air is $599.00, a 4th gen 32gb is $449.00, and a 3rd gen 32gb is not on the site right now.) Google it and check if you can get better offers anywhere else. But getting one from the Apple refurb store gives you an essentially new ipad and using the above sites, you're not locked in with a particular site which will give you a gift card and restrict you to their store/site.
Each Apple refurbished ipad (any version) comes with a new front and back cover, a brand new battery, same return policy, and a full one year warranty with 90 days of phone support. Each comes in a white box like a new ipad with the wall charger and usb cable. The only difference is that it says in small print on the bottom of the box that it is Apple certified refurbished. Also, if you buy refurbs, be sure to check the store many times a day. They can come and go quickly, so when you see what you want, buy it right away. Shipping is free and pretty fast. (We bought two a year and a half ago and they have been great!)
Hope this helps.

Itunes says that the version of software on my ipod touch 3rd gen is up to date, but IOS 5 is avaliable. I have checked for software updates for days but it keeps saying that 4.2.1 is the current version. Why cant i get IOS 5?

itunes says that the version of software on my ipod touch 3rd gen is up to date, but IOS 5 is avaliable. I have checked for software updates for days but it keeps saying that 4.2.1 is the current version. Why cant i get IOS 5?

bradenfromwaikerie wrote:
itunes says that the version of software on my ipod touch 3rd gen is up to date, but IOS 5 is avaliable. I have checked for software updates for days but it keeps saying that 4.2.1 is the current version. Why cant i get IOS 5?
because you do not have a 3rd generation device. The OS Version says so , otherwise you would be at 4.3.5 minimum and also Itunes is also always correct in determining if you have the latest OS ( if not it fetches the newest from Apple's Servers ) . And because a 2nd generation iPod stops at 4.2.1 you can't get the newest OS, because your device is old. Buy a new iPod , they have iOS5 preinstalled.

Apparent cross-talk that is caused by software

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