A radio with a sensitivity of 1uV (SINAD or quieting, you pick) would be quite deaf. Most scanners (which have a looser frontend) are in the ballpark of 0.15uV, while most commercial radios (such as Motorola Spectra/MCS2000/etc.) are in the ballpark of 0.3uV. Even older radios, such as the Motorola Syntor X9000, are a mere 0.4uV without a preamp in the front end. The way a frequency counter works is by looking for a spike FAR above the noise floor. These spikes are generated by decent radios in very close proximity. I have a Scout mounted in the truck, and with a VHF passband filter and an external antenna, the subject still must be line-of-sight (about 100ft. for 5-watt handhelds, 500ft. for 45-watt mobiles).
You are correct in that a frequency counter is not the right tool for the job... you're talking about an AP that transmits around 100mW... you'd have to be standing next to the AP to detect anything, and even that would be questionable. Not to mention 802.11a access points wouldn't be seen, as they're on the 5GHz ISM band.
Counters are great when you have no idea of the frequency in question. Since you know definitely what frequency range and channelization you're looking for, it's much better to use a dedicated radio to look for signals... in this case, I'd recommend an 802.11a/b/g ComboCard and a random site survey. Easy, cheap, etc.
Perhaps I can weigh in as a part of the younger Slashdot crowd (I'm 19, BTW).
I started "programming" with a very close derivative of the 10 PRINT 'XXX'/20 GOTO 10 logic. I was about 2 when I started being able to type my name of the computer, and about 3 when I started actually doing some simple BASIC programs.
I was given Borland C++ around age 10, and inhaled all the manuals, books, readmes, etc. I could find. I also elicited help from others over the Net (then available to me using UUCP and Waffle... remember those days?)
Long story short, the language didn't give me the desire to code. My parents showing me what a computer could do (along with some other exceptional parenting, school involvement, grandparents, ad nauseum) made me interested in learning the computer. Once I started learning, I wanted to do my own thing - the only way to do that was by writing some programs. So, I learned what I needed to know to build those programs..
In short, the language doesn't make that much difference. Programming languages are *not that hard*. If a child has the desire to learn, he'll find a language.
You're either a troll or an idiot. Photoshop is an image manipulation package. QuarkXPress, like InDesign, is an advanced publishing and layout package... most people use Photoshop and Illustrator in concert with a layout package, but neither is a replacement for Quark/InDesign.
Might I suggest you RTFA/RTFWS (website) next time?
"By licking this stamp, you grant all rights and privileges of your genetic code (hereafter Product) to Microsoft, Corp. (the Company). Company hereby grants you a one-processor license of said Product. Unauthorized duplication of Product (through processes such as peer-to-peer Product sharing), are expressly forbidden."
The tablet PC is fantastic for taking notes during lectures. It's unobtrusive, and you can turn the handwriting recognition off while you're maddly scribbling notes and drawing diagrams. Plug in a mic, and you've got a recording of the lecture for future reference.
Wait a minute.... you're supposed to listen and take notes during those lectures? I thought they were meant for a quick nap!
Seriously, as a college student, I would love to have one for these purposes. However, I was faced with the option of a Tablet PC or a Dell Latitude C840, which, while large, contains enough horsepower and drive space to construct/compile large applications, dual-boot WinXP and Linux, etc.
We're caught in a bit of a cycle - prices won't come down because demand isn't high enough, but demand won't increase until prices go down. One of the big companies should create a loss leader (or at least sacrifice a large portion of their profit) to build a sub-$1,000 tablet PC, then we would see the market increase.
Not that I have anything against the impoverished, but...
These people are living in PUBLIC housing projects? Housing that you and I pay for with our tax dollars? I'm in a pretty nice income bracket, living in the middle of Dallas, but I can't get DSL because I'm too far from the CO. However, people we have to subsidize by giving them a place to live (among other subsidies) deserve (probably) high-bandwidth wireless Internet access?
Perhaps we should be more concerned with these people supporting themselves (for instance, paying for their own housing, food, power, etc.) rather than sitting around browsing the Internet.
I'm sure I'll get flamed, but this is only slightly less ridiculous than trying to get broadband internet into third-world countries...
Since their server already seems to be lagging, here's the post:
We are starting to get the distinct impression that FMC is fucking with us on the peroxide supply situation. We keep doing the things they say (spending thousands of dollars), and they keep coming up with some other reason we still can't buy peroxide (or just not return calls for weeks). They have strung us along for a long time now, and convinced us to stop talking to Degussa, but we still don't have peroxide.
There was some talk about this a while ago, but I was a lot more hopeful about FMC, so I didn't pursue it -- maybe it is time to set up a new company on the scale of X-L Space Systems.
I don't want to be in the chemical processing business, but I would probably be willing to be an anchor customer. I want to buy $100,000 worth of peroxide this year.
One of Michael Carden's customers has one of his concentrators, and is willing to do some peroxide production for us, but I would really prefer to work with a company, even a small one, that is devoted to peroxide, and really cares about all the details, not just someone that can feed a machine.
Would any ERPS people be interested in actually running a business to do this? I would be happiest working with a proven production system (one of Michael's), but I could entertain notions of paying for more development work on the ERPS concentrators.
This is sort of a trial balloon here -- if FMC turns around and ships us peroxide, that is still my preferred solution.
Of course, what happens when a fiber gets cut and a large section of the world loses Internet connectivity (see the tunnel fire in Baltimore for more information)?
I'll keep my DLT, SDLT, and LTO/Ultrim drives chugging along, thank you very much.
(At least a couple of years ago), Nortel's Dallas facility was like this. Everyone essentially carried a "tolltag" like device. You could watch the employees move around the building like little lemmings. The resolution was pretty good. Doors that you were authorized to access opened as you approached - if you weren't authorized, they didn't. Also, if you, for instance, went up to the roof and tossed your card to someone on the ground, they couldn't get in because the computer hadn't seen you leave the building. Since you were supposed to wear the tag at all times, it would only open doors near your location.
"SUVs are terrible... they should all be banned."
But let's not say a thing about pickup trucks (which use just as much gas), heavy trucks and 18-wheelers (especially the ones coming up from Mexico) that belch out clouds and clouds of soot, ash, and pollutants. How about all those 30-year-old cars that are still being driven, only half of their cylinders firing, consuming quarts of heavy motor oil, puking out CO, NOx, unburned hydrocarbons, etc. The "SUVs are bad" cry is the cry of hypocritical tree-huggers that don't have anything better to complain about.
I drive one of those empty Expeditions. I'm one of the people you'd probably cut off and act all sanctimonious in front of. What you wouldn't see is the $100K+ worth of communications gear I've built into the truck. You wouldn't know that I volunteer my time with several police and fire agencies doing command and control work. Yes, I drive the truck everywhere. Mainly because I want my equipment close by at all times. You probably won't complain when all those big diesel fire engines and ambulances show up to save you when you get injured (presumably by a pissed-off SUV owner.)
Either shut the fsck up or get your story straight.
You can mod me down, but it doesn't change the fact that I'm right.
Except this is not usually done with low-power transmitter. It's usually done with a fairly high-power transmitter, generating hash across multiple 10s of MHz.
Fine, you say? Keep in mind that, while cellphones operate between 824 and 849MHz (mobile to base) and 869-894MHz (base to mobile), the band in-between is a land-mobile band. MANY city/county/state police/fire communications systems are on this band. If you generate too much trash across too wide of an area, you destroy the ability for public safety officials to communicate. If you're trapped in a smoke-filled hall, you'd really like the firefighter's radio to work so he can come save your ass.
Demonstration devices for the "cool" light-up antennae on cell phones are the same way. The antennae get power to light up by using RF energy. So, to make the entire cabinet light up at once, a high-power transmitter is used. One of these devices can disrupt public safety communications in a large mall with no difficulty.
How about people just learn to be polite, and, when they fail to do so, the surrounding people pummel the offender? Sounds fair to me.
Why can't the general public get those? I'm a member of the general public and have all of the above. They're perfectly legal to possess. I pick my own locks for fun just to see how insecure they really can be.
As for the case, boo-hoo, they should've built a better algorithm.
... that everyone else seems to have missed. Blockquoth the article:
During short periods of high intensity conflict, soldiers may not have access to a real meal or the time to eat it. The Transdermal Nutrient Delivery System (TDNDS) is a nutrition patch that will transmit vitamins and other micronutrients or nutraceuticals to the warfighters and sustain their physical and mental performance.
Note that it says "short periods." This patch is not intended to replace eating forever. It's only a supplement to keep soldiers going for short periods.
Did you read the description of where the money will go if the settlement drops below $5 per claimant?
Rather, the cash portion of the Settlement shall be distributed to not-for-profit, charitable, governmental or public entities to be used for music-related purposes or programs for the benefit of consumers who purchased Music Products.
So, what do you bet the defendants will publicize this heavily and get enough claimants to drop below $5/claimant? Then, they'll get the money funneled into not-for-profit, charaitable, etc. organizations aligned with the distributors and the RIAA. They'll lose money out of the general fund, but it'll get pushed back into other organizations they control.
I may be a bit biased, but I resent the implication that we young workers simply cause problems. I'll probably get modded down as off-topic, but I was fortunate enough to be given a small job doing maintenance on an NT network when I was 10. I'm now 19 and have been with a large family of automotive dealerships for over 4 years, working on application development, eCommerce, web design/maintenance, etc. Had I not been fortunate enough to start in the business at a young age, I wouldn't be where I am today.
Not to mention - do we REALLY need the government involved in something else?
Unfortunately, for most laptop/notebook users, finding the happy medium is important. Most people want hours of battery life in a tiny package with extreme performance. You may choose any two.
I use a Latitude C840, with dual batteries and a permanently mounted DVD/CD-RW. For travel, it weighs around 15lbs., but I have P4/2.0GHz performance, 1GB SDRAM, 60GB HD, and 6-7 hours of battery life (depending on usage).
If you want long battery life and small size, you have to sacrifice performance.
The first person/compnay that builds a small machine with tons of battery life and great performance will make billions overnight. Or, they might get stoned in the public square for violating the laws of physics. But, I prattle on...
With that being the case, you could use external hard drive carriers and a few drives and record your stuff there. Anything you wanted to keep, you could then burn to CD-R/DVD-R/etc.
A decent machine in your den with the right drive receiver wouldn't cost tremendously.
Serial ATA or SCSI with hot-swapping would be even nicer.
Leave it to a bunch of politicians to screw up a good thing. I think it may be time for a reality check - they want to ban the GPL, we need to ban them. Sounds fair to me.
Did Arthur Andersen do their audits? Are we sure they actually make profit, or does it just seem that way on paper?
And the governments usually don't break even...
Can we get you to take a job at the RIAA, followed soon by the MPAA? I think my fellow Slashdotters would agree that they could use a bit of your "assistance."
You: Get a nice, ultra-high-gain, highly-directional 2.4GHz yagi antenna. Connect said antenna to (WEP enabled) access point. Aim antenna at business.
Company: Jimmy Wayne and Bobby John, the fine IT staff, discover that their WiFi net isn't working. They change channels and everything works. So, they change all the computers.
Remember - it's not malicious interference if you actually intended to use it for something ("I wanted to access my network from my... porch, yard, etc.)
Let me get this straight... you're arguing for a very expensive, high-latency satellite-based network when other solutions are available and would probably be cheaper and easier to maintain (very hard to repair satellites) in the long run, AND you want to create the ultimate Big Brother by giving everyone a unique IP associated to some biologic identifier (fingerprint, retina, iris, DNA)?
I can see it now. I'd hate to be the first poor victim of an IP spoof... talk about identity theft!
By the way, satellite phones exist. They are hella expensive, and most are seriously clunky. I prefer the convenience of my tiny Nokia 8260 to the satellite phone I carry in my truck...
Slashdot Mirror
Yeah...
..."
"It appears you're attempting to engage in relations with your significant other! Can I help by a) researching alternative positions, b)
Oh, wait, this is Slashdot, what am I thinking?
I think you need to check your figures...
A radio with a sensitivity of 1uV (SINAD or quieting, you pick) would be quite deaf. Most scanners (which have a looser frontend) are in the ballpark of 0.15uV, while most commercial radios (such as Motorola Spectra/MCS2000/etc.) are in the ballpark of 0.3uV. Even older radios, such as the Motorola Syntor X9000, are a mere 0.4uV without a preamp in the front end. The way a frequency counter works is by looking for a spike FAR above the noise floor. These spikes are generated by decent radios in very close proximity. I have a Scout mounted in the truck, and with a VHF passband filter and an external antenna, the subject still must be line-of-sight (about 100ft. for 5-watt handhelds, 500ft. for 45-watt mobiles).
You are correct in that a frequency counter is not the right tool for the job... you're talking about an AP that transmits around 100mW... you'd have to be standing next to the AP to detect anything, and even that would be questionable. Not to mention 802.11a access points wouldn't be seen, as they're on the 5GHz ISM band.
Counters are great when you have no idea of the frequency in question. Since you know definitely what frequency range and channelization you're looking for, it's much better to use a dedicated radio to look for signals... in this case, I'd recommend an 802.11a/b/g ComboCard and a random site survey. Easy, cheap, etc.
Terry
Perhaps I can weigh in as a part of the younger Slashdot crowd (I'm 19, BTW).
I started "programming" with a very close derivative of the 10 PRINT 'XXX'/20 GOTO 10 logic. I was about 2 when I started being able to type my name of the computer, and about 3 when I started actually doing some simple BASIC programs.
I was given Borland C++ around age 10, and inhaled all the manuals, books, readmes, etc. I could find. I also elicited help from others over the Net (then available to me using UUCP and Waffle... remember those days?)
Long story short, the language didn't give me the desire to code. My parents showing me what a computer could do (along with some other exceptional parenting, school involvement, grandparents, ad nauseum) made me interested in learning the computer. Once I started learning, I wanted to do my own thing - the only way to do that was by writing some programs. So, I learned what I needed to know to build those programs..
In short, the language doesn't make that much difference. Programming languages are *not that hard*. If a child has the desire to learn, he'll find a language.
You're either a troll or an idiot. Photoshop is an image manipulation package. QuarkXPress, like InDesign, is an advanced publishing and layout package... most people use Photoshop and Illustrator in concert with a layout package, but neither is a replacement for Quark/InDesign.
Might I suggest you RTFA/RTFWS (website) next time?
"By licking this stamp, you grant all rights and privileges of your genetic code (hereafter Product) to Microsoft, Corp. (the Company). Company hereby grants you a one-processor license of said Product. Unauthorized duplication of Product (through processes such as peer-to-peer Product sharing), are expressly forbidden."
All your base are belong to us.
Wait a minute.... you're supposed to listen and take notes during those lectures? I thought they were meant for a quick nap!
Seriously, as a college student, I would love to have one for these purposes. However, I was faced with the option of a Tablet PC or a Dell Latitude C840, which, while large, contains enough horsepower and drive space to construct/compile large applications, dual-boot WinXP and Linux, etc.
We're caught in a bit of a cycle - prices won't come down because demand isn't high enough, but demand won't increase until prices go down. One of the big companies should create a loss leader (or at least sacrifice a large portion of their profit) to build a sub-$1,000 tablet PC, then we would see the market increase.
My $0.02.
Not that I have anything against the impoverished, but...
These people are living in PUBLIC housing projects? Housing that you and I pay for with our tax dollars? I'm in a pretty nice income bracket, living in the middle of Dallas, but I can't get DSL because I'm too far from the CO. However, people we have to subsidize by giving them a place to live (among other subsidies) deserve (probably) high-bandwidth wireless Internet access?
Perhaps we should be more concerned with these people supporting themselves (for instance, paying for their own housing, food, power, etc.) rather than sitting around browsing the Internet.
I'm sure I'll get flamed, but this is only slightly less ridiculous than trying to get broadband internet into third-world countries...
Of course, what happens when a fiber gets cut and a large section of the world loses Internet connectivity (see the tunnel fire in Baltimore for more information)? I'll keep my DLT, SDLT, and LTO/Ultrim drives chugging along, thank you very much.
(At least a couple of years ago), Nortel's Dallas facility was like this. Everyone essentially carried a "tolltag" like device. You could watch the employees move around the building like little lemmings. The resolution was pretty good. Doors that you were authorized to access opened as you approached - if you weren't authorized, they didn't. Also, if you, for instance, went up to the roof and tossed your card to someone on the ground, they couldn't get in because the computer hadn't seen you leave the building. Since you were supposed to wear the tag at all times, it would only open doors near your location.
"SUVs are terrible... they should all be banned." But let's not say a thing about pickup trucks (which use just as much gas), heavy trucks and 18-wheelers (especially the ones coming up from Mexico) that belch out clouds and clouds of soot, ash, and pollutants. How about all those 30-year-old cars that are still being driven, only half of their cylinders firing, consuming quarts of heavy motor oil, puking out CO, NOx, unburned hydrocarbons, etc. The "SUVs are bad" cry is the cry of hypocritical tree-huggers that don't have anything better to complain about.
I drive one of those empty Expeditions. I'm one of the people you'd probably cut off and act all sanctimonious in front of. What you wouldn't see is the $100K+ worth of communications gear I've built into the truck. You wouldn't know that I volunteer my time with several police and fire agencies doing command and control work. Yes, I drive the truck everywhere. Mainly because I want my equipment close by at all times. You probably won't complain when all those big diesel fire engines and ambulances show up to save you when you get injured (presumably by a pissed-off SUV owner.)
Either shut the fsck up or get your story straight.
You can mod me down, but it doesn't change the fact that I'm right.
Except this is not usually done with low-power transmitter. It's usually done with a fairly high-power transmitter, generating hash across multiple 10s of MHz.
Fine, you say? Keep in mind that, while cellphones operate between 824 and 849MHz (mobile to base) and 869-894MHz (base to mobile), the band in-between is a land-mobile band. MANY city/county/state police/fire communications systems are on this band. If you generate too much trash across too wide of an area, you destroy the ability for public safety officials to communicate. If you're trapped in a smoke-filled hall, you'd really like the firefighter's radio to work so he can come save your ass.
Demonstration devices for the "cool" light-up antennae on cell phones are the same way. The antennae get power to light up by using RF energy. So, to make the entire cabinet light up at once, a high-power transmitter is used. One of these devices can disrupt public safety communications in a large mall with no difficulty.
How about people just learn to be polite, and, when they fail to do so, the surrounding people pummel the offender? Sounds fair to me.
Why can't the general public get those? I'm a member of the general public and have all of the above. They're perfectly legal to possess. I pick my own locks for fun just to see how insecure they really can be.
As for the case, boo-hoo, they should've built a better algorithm.
Note that it says "short periods." This patch is not intended to replace eating forever. It's only a supplement to keep soldiers going for short periods.
Oh, you say you didn't read the article?
So, what do you bet the defendants will publicize this heavily and get enough claimants to drop below $5/claimant? Then, they'll get the money funneled into not-for-profit, charaitable, etc. organizations aligned with the distributors and the RIAA. They'll lose money out of the general fund, but it'll get pushed back into other organizations they control.
Wait and see...
I may be a bit biased, but I resent the implication that we young workers simply cause problems. I'll probably get modded down as off-topic, but I was fortunate enough to be given a small job doing maintenance on an NT network when I was 10. I'm now 19 and have been with a large family of automotive dealerships for over 4 years, working on application development, eCommerce, web design/maintenance, etc. Had I not been fortunate enough to start in the business at a young age, I wouldn't be where I am today.
Not to mention - do we REALLY need the government involved in something else?
Unfortunately, for most laptop/notebook users, finding the happy medium is important. Most people want hours of battery life in a tiny package with extreme performance. You may choose any two.
I use a Latitude C840, with dual batteries and a permanently mounted DVD/CD-RW. For travel, it weighs around 15lbs., but I have P4/2.0GHz performance, 1GB SDRAM, 60GB HD, and 6-7 hours of battery life (depending on usage).
If you want long battery life and small size, you have to sacrifice performance.
The first person/compnay that builds a small machine with tons of battery life and great performance will make billions overnight. Or, they might get stoned in the public square for violating the laws of physics. But, I prattle on...
With that being the case, you could use external hard drive carriers and a few drives and record your stuff there. Anything you wanted to keep, you could then burn to CD-R/DVD-R/etc.
A decent machine in your den with the right drive receiver wouldn't cost tremendously.
Serial ATA or SCSI with hot-swapping would be even nicer.
Leave it to a bunch of politicians to screw up a good thing. I think it may be time for a reality check - they want to ban the GPL, we need to ban them. Sounds fair to me.
Did Arthur Andersen do their audits? Are we sure they actually make profit, or does it just seem that way on paper? And the governments usually don't break even...
Always wanted to be a fly on the wall? Now's your chance! I can think of so many ways to get in trouble with these devices... :-)
Can we get you to take a job at the RIAA, followed soon by the MPAA? I think my fellow Slashdotters would agree that they could use a bit of your "assistance."
A very simple solution.
You: Get a nice, ultra-high-gain, highly-directional 2.4GHz yagi antenna. Connect said antenna to (WEP enabled) access point. Aim antenna at business.
Company: Jimmy Wayne and Bobby John, the fine IT staff, discover that their WiFi net isn't working. They change channels and everything works. So, they change all the computers.
Remember - it's not malicious interference if you actually intended to use it for something ("I wanted to access my network from my... porch, yard, etc.)
Let me get this straight... you're arguing for a very expensive, high-latency satellite-based network when other solutions are available and would probably be cheaper and easier to maintain (very hard to repair satellites) in the long run, AND you want to create the ultimate Big Brother by giving everyone a unique IP associated to some biologic identifier (fingerprint, retina, iris, DNA)?
I can see it now. I'd hate to be the first poor victim of an IP spoof... talk about identity theft!
By the way, satellite phones exist. They are hella expensive, and most are seriously clunky. I prefer the convenience of my tiny Nokia 8260 to the satellite phone I carry in my truck...