Can the SPA 8000 be Daisy Chained to get more ports

We have a situation where end user has 13 lines.
Is it possible to daisy chain 2 SPA 8000 G1 to get the necessary number of ports?
Thank You

It is possible to connect multiple SPA8000 to the same network. All you have to do is to connect your SPA8000 to one of the numbered ports of the switch. Each SPA8000 should have a unique IP address. Cheers!

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Can the analog inputs be daisy chained to measure higher voltages?

Can the analog inputs of a PXI-6289 be connected in series to measure higher voltages than normally allowed at the analog inputs of the PXI-6289 (i.e. 10 VDC)? For example, let's say I wanted to measure 18 VDC using an analog input channel of the PXI-6289. I would then pick two AI channels and connect the positive of one to the negative of the other and then the two remaining leads would be placed across the 18 VDC. Resistors could also be placed across the 18 VDC to form a votage divide. One AI would measure the voltage across one resistor and the other AI would measure the voltage across the remaining resistor. I have tried this and the voltage measurements appear to loose accuracy. Thank you for your help.

Hello Rafi,
You may want to invest in a high voltage attenuator for signal conditioning prior to reading the signal. The documents below may also be helpful:
High Voltage and Isolated Measurements
http://zone.ni.com/devzone/cda/tut/p/id/10693
High-Voltage Measurements and Isolation
http://zone.ni.com/devzone/cda/tut/p/id/3410
Regards,
Roman Sandoval | National Instruments | RF Systems Engineer

I am using the Order Analysis Toolkit and want to get more information about the compensation for "Reference Signal Processing", which is scarce in the manuals, the website and the examples installed with the toolkit.

I am using the Order Analysis Toolkit and want to get more information about the compensation for "Reference Signal Processing", which is scarce in the manuals, the website and the examples installed with the toolkit.
In particular, I am analyzing the example "Even Angle Reference Signal Processing (Digital Tacho, DAQmx).vi", whose documentation I am reproducing in the following:
DESCRIPTIONS:
This VI demonstrates how to extract even angle reference signals and remove the slow-roll errors. It uses DAQmx VIs to acquire sound or vibration signals and a digital tachometer signal. This VI includes a two-step process: acquire data at low rotational speed to extract even angle reference; use the even angle reference to remove the errors in the vibration signal acquired at normal operation.
INSTRUCTIONS:
1. Run the VI.
2. On the DAQ Configurations tab, specify the sample rate, samples per channel, device and channel configurations, and tachometer channel information.
NOTE: You need to use DSA PXI-447x/PXI-446x and PXI TIO device in a PXI chassis to run this example. The DSA device must be in slot 2 of the PXI chassis.
3. Switch to Extract Even Angle Reference tab. Specify the number of samples to acquire and the # of revs in reference which determines the number of samples in even angle reference. Click Start to take a one-shot data acquisition of the vibration and tachometer signals. After the acquisition, you can see the extracted even angle references in Even Angle Reference.
4. Switch to the Remove Slow-roll Errors tab. Click Start to acquire data continuously and view the compensate results. Click Stop in this tab to stop the acquisition.
ORDER ANALYSIS VIs USED IN THIS EXAMPLE:
1. SVL Scale Voltage to EU.vi
2. OAT Digital Tacho Process.vi
3. OAT Get Even Angle Reference.vi
4. OAT Convert to Even Angle Signal.vi
5. OAT Compensate Even Angle Signal.vi
My question is: How is the synchronization produced at the time of the compensation ? How is it possible to eliminate the errors in a synchronized fashion with respect to the surface of the shaft bearing in mind that I am acquired data at a low rotation speed in order to get the "even angle reference" and then I use it to remove the errors in the vibration signal acquired at normal operation. In this application both operations are made in different acquisitions, therefore the reference of the correction signal is lost. Is it simply compensated without synchronizing ?
Our application is based on FPGA and we need to clarity those aspects before implementing the procedure.
Solved!
Go to Solution.

Hi CracKatoA.
Take a look at the link bellow:
http://forums.ni.com/ni/board/message?board.id=170&message.id=255126&requireLogin=False
Regards,
Filipe Silva

Does anyone know how the cutout filter works and is there a way of achieving the same effect without using filters to get more control over final look?

does anyone know how the cutout filter works and is there a way of achieving the same effect without using filters to get more control over final look?

Several ways to get similar results. Image > Adjustments > Posturize with low values similar to what you'd use n Cutout. This is the most flexible way I can think of as you keep the image in RGB mode with layers intact. A more radical approach would be to reduce bit depth using Indexed Colour. You'll need to experiment with settings, try changing Forced to Primaries, and Matte to Foreground Color. There's no going back from this route, although you can change the mode back to RGB to re-enable layers, adjustment layers etc.
A nice thing about the Filter gallery filters is that you can change the layer to a Smart object with all the control that gives you.
Now if only this forum could filter out bizarre content.

What can I delete from what folders to A) get more space and B) speed up machine. 2009 Imac Intel based Leopard

What can I delete from what folders to A) get more space and B) speed up machine. 2009 Imac Intel based Leopard

If you start deleting things in hidden system folders, or in an /Library folder you may very well mess up something.
That is why I say limit what you delete to your User folder only and only those files you've put or created there. Start messing with anything system or application related without know exactly what you are doing and you risk fubar'ing something.
There are in fact many places in the system areas that will appear to be redundant, but they are not so just because they have similar path or file names.
Also, how much free space do you have with just a freshly rebooted system? If your system does not have much RAM (given the apps your normally run on it), it may be creating quite a bit of swap space. That will be flushed out with a reboot, but if your system is RAM limited, then it will just grow back. In such a case, more RAM would help.
Use Activity Monitor to look at your RAM and swap use over a few days of normal use - look particularly at the page outs, as that will tell you how much virtual memory is actually being used on the drive. If page outs are high (thousands to 10's of thousands or more) your system is RAM limited, and your drive will be filling up with swap files.

How can I write to multiple daisy-chained network serial addresses through a single COM port?

I have a VI to write to 3 PI Mercury motor controllers using daisy chained RS232 connected via a Prolific USB-to-Serial adapter. I know that it is possible to talk to the individual controllers because the PI terminal that I have recognises the addresses of multiple controllers and designates them Device 1,2,3. The VISA resource name when configuring the port just comes up as COM5 most of time, with seemingly no way to specify an address on that COM port. Occasionally the VISA resource is ASRL5::INSTR and as this is disconnected and re-connected, this address moves up a number (e.g ASRL7::INSTR). Can anybody tell me how I can configure my serial communication to allow me to individually communicate with the different devices through a single COM port?

What does the manual say about addressing? RS-232 is not multidrop, the resource name is correct, and there is no additional configuration needed. There would have be a specific write in order to address a certain controller.

Can anybody tell me when you go to settings then go to safari what is that line that has database and can the a dress ther be used to get ur personal billing information

Can someone get my billing information if they have there gmail a dress listed in my iPad settings for safari in the spot that says database

Can someone get my billing information if they have there gmail a dress listed in my iPad settings for safari in the spot that says database

Does the VZW Email: 'Find out how to get more with Verizon' still work?

I received this email not too long ago (September)... Anyone know if the 3rd option is available anywhere?
Dear Stephen,
Thank you for choosing Verizon. We never overlook the fact that you've trusted us to keep you connected to what's important to you. Your continued loyalty inspires us to deliver more. More value. More savings. More choices. More of everything you want.
As a valued Verizon customer, you can:
Get a Verizon Wireless Gift Card
Our limited-time Trade In and Trade Up event starts 9/12! Renew your two-year agreement and trade in an eligible smartphone from any carrier to get a Verizon Wireless gift card valued at $50, $100, $200 or even $300.
Enjoy 1 GB of Bonus Data per Month
Upgrade to a smartphone and get 1 GB of bonus data per month for up to 24 months, as long as the smartphone remains active on a MORE Everything PlanSM with 1 GB of data or higher.
Lower Your Bill by $10 per Month
Not quite ready to upgrade? No problem. Keep your current phone and we'll lower your bill by $10 every month until you're ready to upgrade or renew your service agreement.
Redeem Smart Rewards
You’re already earning points! Use them for great travel deals and special savings on brand-name merchandise, movies, dining and more.
We truly appreciate your business and look forward to continuing to provide the exceptional wireless service that you deserve.
Best regards,
John Edwards
Director, Customer Loyalty Team

Thank you for replying VanetrisC_VZW!
So, where do I lower my bill by $10/month? I am not seeing it under smart rewards. The link points me to no such option.
Lower Your Bill by $10 per Month
Not quite ready to upgrade? No problem. Keep your current phone and we'll lower your bill by $10 every month until you're ready to upgrade or renew your service agreement.

How many FW devices can you daisy chain?

Have a new iMac w/ one FW800 port. Need to daisy chain eight FW800 hard drives, two FW400 hard drives, and one FW400 DigiDesign Digi002 ProTools mixing board. I was planning on daisy chaining all the FW800 drives then coming out of the last of those with a FW800 to FW400 cable into the first FW400 drive, daisy chaining to the 2nd FW400 drive, then daisy chain from it into the FW400 ProTools mixing board. I know that's a lot of chaining but at the moment those are the devices I have to work with. I have A LOT of video and audio information I need to retain. Seems to me that I read somewhere about a maximum length a firewire daisy chain could be but haven't found any more reference to it when I just looked. All of the devices have their own power supplies so I don't believe they will be drawing much, if any power from the chain. Anybody know of any problems with this setup?

Thanks for the info.
I've tried several scenarios and combinations what I've found is that I can put all the FW800 drives in a daisy chain then put the 1st FW400 drive in and lastly the Digi002 mixing board (which is FW400). When I try to add to this any more drives I get unpredictable results. I have therefore bough another 2TB external drive and hooked it up through USB 2.0 and copied many files to it from the older FW400 drives as well as the only FW800 drive that ever game me headaches. It should be noted that it is a Western Digital My Book drive. It seems like it would be a great drive having FW800, FW400, and USB 2.0 connections. In practice, however, I have had LOTS of problems both on my Macs and PCs I tried using it on. I recommend strongly that you avoid using any MY Book drives. I'm having better luck with practically any other manufacturer, including what I would normally consider no names like SimpleTech and Buffalo. Those drives seem much more stable.

Daisy chain two external drives via Firewire, then connect one via USB to the TC?

Hi,
I have two external drives that have both Firewire and USB ports. My 1st generation 500 gb Time Capsule (maybe all of them?) only has USB ports so up til now, I have connected one or the other drive via USB. (I've tried to connect both to a powered USB hub but one drive has problems showing up. At this point I only use the one drive that shows up and connect it directly with no hub to the Time Capsue.)
My question is: Can I daisy chain the two drives via Firewire and then connect one of them (probably the one that has no problems connecting with USB) to the Time Capsule via USB?
Second, somewhat-related problem...
I don't know why one drive isn't connecting very well when directly connected to the Time Capsule. Both are Fantom drives. One is a 1TB, the one that has prblems connecting is a 250GB. I've tried connecting directly or through a powered hub. The 1B has no problems, the 250 gb won't show up most of the time and disconnects itself fairly quickly if it does connect. I've switched cables; that hasn't helped. The 1TB stays connected most of the time but sometimes it disconnects too. I suspect the Time Capsule just isn't able to deal with external drives so I don't puch it. It would be nice to be able to have both drives accessable through the TC though.
Thanks for any help.
Cheers,
John

Doing some experimentation, connecting the drives directly to the MBP:
- Neither of the two drives Firewire daisy-chained and going through the powered USB hub connected to the MBP mount. I was using old aliases on desktop.*They don't show up on network otherwise. (Each drive self-mounts with both Firewire and USB direct connections.)
*Even after making new aliases, neither drive will mount using their new aliases when directly connected (not through hub) with USB or Firewire (and Thunderbolt adapter.) That's weird.
- Both the 240 gb and the 1TB drives going through powered hub connected to MBP mount by themselves.
- Two drives daisy-chained via Firewire and one drive connected to the MBP via Firewire (and Thunderbolt adapter) self-mount. No surprise there but that doesn't help me as I want to have the drives further away from the MBP and connected to the Time Capsule, which doesn't have a Firewire port anyway...
- All of the USB and the Firewire cables work as does the Thunderbolt adapter. I tested them.
I wonder.... I have a Firewire to what appears to be an Ethernet connector. I wonder if that would be any good. I'm afraid to try it though...

Mac Mini 2009 - Can't daisy chain two FW800 drives

I have two FW800 enclosures with 3.5-inch drives and external power.
Each one mounts individually when connected to the Mini FW800 port but when I daisy-chain them the second one in the chain doesn't mount and is not seen by disk utility.
Those enclosures use an Oxford UF934DSB chipset.
What's ironic that I had a FW400 enclosure daisy chained to one FW800 enclosure until this afternoon and that daisy-chain worked fine.
Somewhere on the net there was an article that the daisy-chaining had to be done in a certain sequence, ie Mac FW to top FW port on first external, then from bottom of first FW enclosure to top of second and so forth.
I always though the FW ports were just wired in parallel.
Well, this is interesting - since these new FW800 enclosures also have one FW400 port as well, I just connected the second one using the FW400 ports and now they both mount.
But now the whole chain only runs at FW400 speeds.
Anyone else come across this problem or better yet, what is the solution to get both daisy-chained FW800 drives to mount.
The enclosures are Rosewell, the drive in each a 1.5 TB WD green.

I don't think it has anything to do with the power supply.
The two enclosures are identical and react (work or not) exactly the same when I interchange them or the FW cable.
They also work flawlessly if I connect the second one using FW400 instead of FW800. Would just trying to get the enclosure to mount with FW800 draw more current than when mounting with FW400 to put the power brick over the edge? I doubt it.
A few other things I'm going to try - I do this when I have a few extra minutes since I can't afford to spend my time on this continuously.
1. See if there is a F'W update for the enclosure and/or the Oxford chip.
2. Talk to the Oxford and enclosure support people
3. Update to 10.6.4, I'm on 10.6.2 right now
4. Do a bit more digging on the net to see how others got the FW800 daisy-chaining working.
The two enclosures react the same when I try each one separately and also when I switch them around. Whatever the problem is, it affects both equally so it's not some defect on one of them.
With the rest of the testing I have done, I'm now pretty sure it's a Mac software problem.
Although I would have thought someone else would have this problem as well but I can't even find any discussion on daisy-chaining with this chipset when running OS 10.6.
There is a 15-digit number in disk utility called connection ID.
I assume that is the Firewire ID number that some threads I read refer to.
That ID is the same for the two FW800 ports and the FW400 port on each enclosure but it's different for the two enclosures, so some conflict there is definitely not the issue.
So far I couldn't find what the latest issue of firmware is for the Oxford chip set, but I copied all the information that comes up with the firewire hardware listing so when I find the information I can check it against the firmware issue on my two units.
Now, another interesting tidbit - some people say they had to power up the enclosure a few times occasionally to get a single drive to mount.
I never had that problem, a single FW800 drive always mounted right away, but I decided to try that with the daisy-chained drive.
So I turned the power switch on that second drive off and then on again...and lo and behold - doesn't it mount now........
But that is not the interesting tidbit........the tidbit is when I check back in the Mini Firewire hardware listing.
Whereas before it showed all the expected detail with either drive when connected individually via FW800, now with both FW800 drives connected I get this:
*FireWire Bus:*
*Warning: Unable to list FireWire devices.*
*Maximum Speed: Up to 800 Mb/sec*
....and oooops - both FW800 drives just disconnected by themselves.
Sure seems to point to a Mac software issue.
And if you google for "Warning: Unable to list FireWire devices." you get pages of hits - many on Leopard but also a fair share on SL.
I updated the software to 10.6.4 - still the same problem.
Daisy-chain with FW400 is fine, with FW800 the second drive in the chain - doesn't matter which one it is, won't mount.

Can't daisy chain Thunderbolt 1 and 2 drives

I have a Mac Mini server (mid 2011) with a Pegasus R4 connected via Thunderbolt that has been running fine. The Mini is running Lion Server.
Just recently I got a Lacie 2big drive with Thunderbolt 2. I assumed that TB2 was backwards compatible so daisy chaining the Lacie to the Pegasus wouldn't be an issue. But when I do so, the Lacie doesn't mount and Disk Utility cannot see it.
However, if I connect the Lacie directly to the Mini it mounts and works fine. So then I tried connecting the Pegasus to the Lacie. But now the Pegasus doesn't mount and can't be seen by Disk Utility or Promise Utility.
So, is the problem trying to daisy chain TB1 and TB2 devices together? Or is it the Mini? Or is it Lion?
Any help will be appreciated.

Thanks for the quick reply. The Pegasus is over 3 years old and I have never updated the firmware. I will do so.
However, I got everything to work. The one I thing I didn't try was rebooting with both drives daisy chained and turned on. This did it. I restarted many times but each time was with only one of the drives connected. Not sure why a reboot is necessary for the daisy chained device to be visible.

Will I lose the data of the old Promise Pegasus after a new one as daisy chain with the first? It says synchronizing.

Hello,
I have a Promise Pegasus R4 storage with a lot of data. I have bought another one and connected it to the first through thunderbolt ( obviously ) , the Promise Utility says on the new one "Synchronizing". On the desktop I see 2 Promise Pegasus icons 1 with the data which is the old Raid and the other empty which is the new one. What will be the result of that daisy chain Synchronization ? Will I lose the old data?
Your fast response regarding that matter is highly appreciated as Im worried for my data they're extremely important.
Thanks.

That would seem to be a question best asked of Promise themselves:
http://support.promise.com
This forum is for old, pre-G3 Apple hardware and almost certainly not a forum where you'll be likely to get useful responses.
Regards.

Daisy chain of routers

I've already got a 500GB Time Capsule on its way in the mail. I've just found out that I'm going to be moving into a house with a bunch of friends. The potential problem is that the owner of the house already has his own wireless a/b/g router (brand unknown) and cable modem (whatever Cox sold him with his internet) set up for the network. I've offered up my forthcoming Time Capsule for the purposes of wireless networking, but he's loathe to change his setup as it has been in place for some years.
In the interest of diplomacy, I've devised what I figure could be an amicable solution from a "societal" standpoint, but the technical machinations of which I am unsure. That is where my questions begin...
1) Would it be an easy (or even possible) solution to simply plug my Time Capsule directly into the cable modem and then daisy chain his router to the Time Capsule via ethernet cable? This way, if it works, we can have two networks (his original a/b/g and my n) running simultaneously.
2) Would this allow him to keep his network configurations intact while I'd have my Time Capsule network?
3) Would this present any great disadvantage--as far as network speed goes-- to either my network or his?
4) Like I said, I'm unsure of what kind of router he uses (definitely not an Airport), but would the router likely have any objection (security or otherwise) to being stuck on the end of a daisy chain like I've proposed?
5) Would there be any likelihood of interference from having two routers pumping out internet right next to each other? If so, will simply changing the frequency of the Time Capsule do anything to alleviate the problem of interference?
I know, the easiest solution is probably just to try it, but as I've said, the owner of the house is very happy with what he has set up and very reluctant to change it. He would like some sort of evidence that it won't foul everything up before I even begin to mess with it.
Thank you all very kindly for reading this. This might be sort of uncharted territory, but that's what we're here for, right?

Wow, thanks for letting me know about that other thread. Great info.
I have some follow-up questions for anyone who knows anything about this stuff.
1) I was thinking that putting a g router in between the cable modem and the Time Capsule would disallow using my Time Capsule in n mode. Am I incorrect in that assumption?
2) Another reason I wanted to put my Time Capsule in between the cable modem and the g router was that I was hoping I could do all the configuration in my Time Capsule and leave the g router settings alone. Is that a faulty assumption as well? Would I still have to mess with the g router's settings either way?

Problem with daisy chaining HDDs and Time Machine

I have purchased 2 WD My Passport Studio FireWire 2TB HDDs which I have daisy chained to my MacBook Pro. One I have assigned to be the Time Machine backup the other as an additional data drive. Both are formatted for Mac OS Extended (Journaled). I setup Time Machine to backup both the internal and external drive. When I set it up everything looked OK in Time Machine Preferences, but the daisy chained data drive displayed on the desktop with the Time Machine backup logo and the backup drive displayed as a standard FireWire data drive. However the backup worked successfully and backed everything up to the correct backup drive.
I have since established the following:
1. If both drives are daisy chained and then plugged in, the data drive shows up with the backup icon and the backup drive shows as a data drive, but Time Machine backs up to the correct drive. This is the case regardless of what order the drives are daisy chained.
2. If the backup drive is plugged in on its own it shows up correctly with the backup drive icon. If the data drive is then daisy chained to the backup drive both drives show up as backup drives. Time Machine backs up to the correct backup drive.
3. If the data drive is plugged in on its own it shows up incorrectly as the backup drive. If the backup drive is then daisy chained to the data drive the backup drive shows as a normal FireWire data drive. But Time Machine still backs up to the correct drive. Exactly the same as case 1 but the drives have been daisy chained after connecting to the MacBook Pro and the result is the same.
4. However if the data drive is plugged in on its own, showing up as the backup drive, Time Machine backs up to the data drive incorrectly.
The first three points are just annoying as the drive icons do not display correctly, although it does indicate to me that Time Machine is confused. But what I don't like is the fact that I can't just use the external data drive without the backup drive being present.
How do I overcome this problem?

Launch Disk Utility and select one of the volumes in question. Click the Info button in the toolbar. In the Information window that opens, note the Universal Unique Identifier. Do the same with the other volume. Are the identifiers the same?

Can the SPA 8000 be Daisy Chained to get more ports

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