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First post after long reading here, very nice source of information about HTC PDA phones.
I just bought one TyTN II from a HK eBay seller - fast FedEx shipping so should arrive next Thursday.
In the mean time, I am looking for a good case and found many made of aluminum at the web and eBay. Click to see eBay link.
My question is, that aluminum will not act as a RF shield for both input/output cell signals? And that probable shield will not increase the battery drain forcing more current (giving more power output) at the internal cell transmitter?
More power output mean less battery charge life.
Moreover, it will not reduce also the GPS signal reception?
Someone already did a test (cell/GPS signal strength with and without that aluminum case)?
Thanks,
Sergio
I got one of those cases I havent notised any signal drops and im using Wifi and GPS and EDGE all the time
My monaco is great, no problems
Looking around, found this message of member cornellfOo in [URL="http://forum.xda-developers.com/showthread.php?t=352605&page=9]Seidio's Super slim rubberized case[/URL]:
"Wow. Glad to hear these types of cases finally came out.
Anyone know if these cases will hinder reception? I bought one of the aluminum hard cases and that definitely affected reception. I'm assuming that it's the aluminum and not cases in general that cause this.
I am in low service areas often so it can be the difference between making calls and not."
Usually any metal enclosures do shield RF signals and normally metal shield are used exactly to avoid RF leaking from devices. So, that is my point and would be great if more members could do this test and report here.
No problems with my aluminum case
I don't have a real scientific test, but I used my aluminum case for a solid week when recently on vacation and had no problems at all. (I switch to different cases depending on the situation and wanted the extra protection for it while it was in my pocket all day.) I used GPS, made phone calls and checked email and web pages with no problems whatsoever. (I saw no decrease in signal strength bars either.)
I also didn't notice any increased battery drain. In fact I even had an external charger with me just in case but only used it once all week and even that time I didn't really HAVE to use it (I just liked topping it off.)
That's just my experience.
The metal case costs you around 10 - 15db!!
Yes.. thats a lot.
You can check it with the tool Fieldtest.
thommic said:
The metal case costs you around 10 - 15db!!
Yes.. thats a lot.
You can check it with the tool Fieldtest.
Click to expand...
Click to collapse
Well I am still waiting for my device to be delivered, scheduled tomorrow by FedEx so, I can't yet make any measurements myself but, if you think that every 3 db down step is exactly the half in power measurements, that metal shield will eat too much signal.
I have one of these aluminum cases and I have found that I get better reception:
With the case open/screen tilted vs closed up
With the case off vs case on
I figured it would function as a RF shield and in all honesty it's not a huge deal to me. It's not hard to remove the device from the case if you need those extra bars, and I'll be installing a cellular repeater in my vehicle since we have mediocre (at best) cellular coverage up here.
Same here -- I just received my Monaco case, and have not noticed any interference in reception. I like it: my Kaiser feels protected now.
rgds, Manny
Hey all.
Im looking for a mono head set for use when driving. I looked all over, but no luck. Any ideas?
shamus072 said:
Hey all.
Im looking for a mono head set for use when driving. I looked all over, but no luck. Any ideas?
Click to expand...
Click to collapse
the adapter that came with your device.... use it and then use any 2.5mm or 3.5mm mono earpiece.
Thanks for the respose... I would still need one with a mic in it. Are they out there?
Let me be the first to say. WHY!?!?!?! An ok BT headset is about the same price as a miniUSB mono headset. I would suggest you better spend $10 more on a BT headset.
Kraize said:
Let me be the first to say. WHY!?!?!?! An ok BT headset is about the same price as a miniUSB mono headset. I would suggest you better spend $10 more on a BT headset.
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Click to collapse
+1, on that!!!
I know you guys are aware of this but I will say it anyway. For the young and the old, it is advised to use a wired headset to reduce the radiation exposure. The majority of data on this subject is conflicting, but some are be proactively cautious.
aadadams said:
I know you guys are aware of this but I will say it anyway. For the young and the old, it is advised to use a wired headset to reduce the radiation exposure. The majority of data on this subject is conflicting, but some are be proactively cautious.
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Click to collapse
If your so worried about radiation exposure, then why would having a wired headset that makes you keep the phone within closer reach than a bluetooth headset would, make a difference.
Besides radiation is not the correct term for what your describing, the correct term is "RFI" radio frequency interference, As well a "EMI" electromagnetic interference Neither of witch dangerously result in spurious emissions.
HERE Read up.....
EMI/RFI types
EMI or RFI may be broadly categorized into two types; narrowband and broadband.
Narrowband interference usually arises from intentional transmissions such as radio and TV stations, pager transmitters, cell phones, etc. Broadband interference usually comes from incidental radio frequency emitters. These include electric power transmission lines, electric motors, thermostats, bug zappers, etc. Anywhere electrical power is being turned off and on rapidly is a potential source. The spectra of these sources generally resembles that of synchrotron sources, stronger at low frequencies and diminishing at higher frequencies, though this noise is often modulated, or varied, by the creating device in some way. Included in this category are computers and other digital equipment as well as televisions. The rich harmonic content of these devices means that they can interfere over a very broad spectrum. Characteristic of broadband RFI is an inability to filter it effectively once it has entered the receiver chain. [2][3]
[4]
EMI in Integrated Circuits
Electromagnetic compatibility
Integrated circuits are often a source of EMI, but they are never the "antenna". They must couple their energy to larger objects such as heatsinks, circuit board planes and cables to radiate significantly [5].
On integrated circuits, important means of reducing EMI are: the use of bypass or "decoupling" capacitors on each active device (connected across the power supply, as close to the device as possible), rise time control of high-speed signals using series resistors[6], and VCC filtering. Shielding is usually a last resort after other techniques have failed because of the added expense of RF gaskets and the like.
The efficiency of the radiation depends on the height above the ground or power plane (at RF one is as good as the other) and the length of the conductor in relation to the wavelength of the signal component (fundamental, harmonic or transient (overshoot, undershoot or ringing)). At lower frequencies, such as 133 MHz, radiation is almost exclusively via I/O cables; RF noise gets onto the power planes and is coupled to the line drivers via the VCC and ground pins. The RF is then coupled to the cable through the line driver as common-mode noise. Since the noise is common-mode, shielding has very little effect, even with differential pairs. The RF energy is capacitively coupled from the signal pair to the shield and the shield itself does the radiating. One cure for this is to use a braid-breaker or choke to reduce the common-mode signal.
At higher frequencies, usually above 500 MHz, traces get electrically longer and higher above the plane. Two techniques are used at these frequencies: wave shaping with series resistors and embedding the traces between the two planes. If all these measures still leave too much EMI, shielding such as RF gaskets and copper tape can be used. Most digital equipment is designed with metal, or conductive-coated plastic, cases.
Susceptibilities of different radio technologies
Interference tends to be more troublesome with older radio technologies such as analogue amplitude modulation, which have no way of distinguishing unwanted in-band signals from the intended signal, and the omnidirectional dipole antennas used with broadcast systems. Newer radio systems incorporate several improvements that improve the selectivity. In digital radio systems, such as Wi-Fi, error-correction techniques can be used. Spread-spectrum and frequency-hopping techniques can be used with both analogue and digital signalling to improve resistance to interference. A highly directional receiver, such as a parabolic antenna or a diversity receiver, can be used to select one signal in space to the exclusion of others.
The most extreme example of digital spread-spectrum signalling to date is ultra-wideband (UWB), which proposes the use of large sections of the radio spectrum at low amplitudes to transmit high-bandwidth digital data. UWB, if used exclusively, would enable very efficient use of the spectrum, but users of non-UWB technology are not yet prepared to share the spectrum with the new system because of the interference it would cause to their receivers. The regulatory implications of UWB are discussed in the Ultra-wideband article.
Interference to consumer devices
Complex electronic circuitry is found in all sorts of devices used in the home. This results in a vast interference potential that didn't exist in earlier, simpler decades. In the US, Public Law 97-259, enacted in 1982, gave the FCC the authority to regulate the susceptibility of consumer electronic equipment sold in the United States. The FCC, working with equipment manufacturers, decided to allow them to develop standards for EMI immunity and implement their own voluntary compliance programs.[7]
Broadcast transmitters, two-way radio transmitters, paging transmitters, and cable TV are potential sources of RFI and EMI.[8] Other possible sources of interference include a wide variety of devices, such as doorbell transformers, toaster ovens, electric blankets, ultrasonic pest control devices, electric bug zappers, heating pads, and touch controlled lamps. Multiple CRT computer monitors or televisions sitting too close to one another can sometimes cause a "shimmy" effect in each another, due to the electromagnetic nature of their picture tubes, especially when one of their de-gaussing coils is activated.
Switching inductive loads, such as electric motors, off causes interference, but it is easily suppressed by connecting a snubber network, a resistor in series with a capacitor, across the switch. Exact values can be optimised for each case, but 100 ohms in series with 100 nanofarads is usually satisfactory.
Switched-mode power supply can be a source of EMI, but have become less of a problem as design techniques have improved, such as integrated power factor correction.
Most countries have legal requirements that mandates electromagnetic compatibility: electronic and electrical hardware must still work correctly when subjected to certain amounts of EMI, and should not emit EMI which could interfere with other equipment (such as radios).
Thanks for expanding. For the record, my statement was written in lay terms. Additionally, the term I chose was apt, as radiation can (and does) originate from RF sources and/or electromagnetic sources, but no matter the source it is still radiation. My information comes from the American Medical Association AMA and the New England Journal of Medicine NEJM. I do not profess to know the impact of prolonged exposure to RADIATION from cell phones, but some clinicians feel it wise to limit the exposure of children as there brains have not fully developed and the elderly due to their susceptability to illness. Until a couple months ago I was an active cancer researcher, and my PhD is in bioanalytical chemistry.
KD8DNS said:
the adapter that came with your device.... use it and then use any 2.5mm or 3.5mm mono earpiece.
Click to expand...
Click to collapse
Does the included adapter support headsets with microphones?
aadadams said:
Thanks for expanding. For the record, my statement was written in lay terms. Additionally, the term I chose was apt, as radiation can (and does) originate from RF sources and/or electromagnetic sources, but no matter the source it is still radiation. My information comes from the American Medical Association AMA and the New England Journal of Medicine NEJM. I do not profess to know the impact of prolonged exposure to RADIATION from cell phones, but some clinicians feel it wise to limit the exposure of children as there brains have not fully developed and the elderly due to their susceptability to illness. Until a couple months ago I was an active cancer researcher, and my PhD is in bioanalytical chemistry.
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Click to collapse
Not trying to argue. But from my standpoint (im not a doc) However I have numerous FCC licenses. I am the senior regional technician for AT&T northeast division. We have done numerous field tests on all kinds of medical equipment to ensure the safe operation of the end user. This was more of a worry back in the days of the 3 watt analogue devices, but now a days we use devices that PEP (peak power output) in the milliwatts.
For years in the lab we have used cell site emulators with various medical devices, hired doctors to aid in research, back in the analogue days this was true and I have seen it first hand. Now when we do in lab tests no major interference is even documented. No I am NOT saying for a individual with a pacemaker to go for it.
I'm not arguing with you, we can agree to disagree, You have your area of expertise and I have mine, we could go on for days. However there has never really been any conclusive evidence that gives a accurate cause to this, at this time its only speculation. I am also VERY familiar with all of the publication in the AMA, I read them all the time, my wife is a cardiologist in Cincinnati.
For the record, I hate when people use the word "radiation" in a statement of "spread spectrum". The first instinct id "oh goodness radiation can kill me" were as radiation is all around you every day all day long. Unless you live in a Faraday cage in a dark room. That is why i felt it necessary to explain differences.
btprice2001 said:
Does the included adapter support headsets with microphones?
Click to expand...
Click to collapse
Yes, I believe it does.
KD8DNS said:
Not trying to argue. But from my standpoint (im not a doc) However I have numerous FCC licenses. I am the senior regional technician for AT&T northeast division. We have done numerous field tests on all kinds of medical equipment to ensure the safe operation of the end user. This was more of a worry back in the days of the 3 watt analogue devices, but now a days we use devices that PEP (peak power output) in the milliwatts.
For years in the lab we have used cell site emulators with various medical devices, hired doctors to aid in research, back in the analogue days this was true and I have seen it first hand. Now when we do in lab tests no major interference is even documented. No I am NOT saying for a individual with a pacemaker to go for it.
I'm not arguing with you, we can agree to disagree, You have your area of expertise and I have mine, we could go on for days. However there has never really been any conclusive evidence that gives a accurate cause to this, at this time its only speculation. I am also VERY familiar with all of the publication in the AMA, I read them all the time, my wife is a cardiologist in Cincinnati.
For the record, I hate when people use the word "radiation" in a statement of "spread spectrum". The first instinct id "oh goodness radiation can kill me" were as radiation is all around you every day all day long. Unless you live in a Faraday cage in a dark room. That is why i felt it necessary to explain differences.
Click to expand...
Click to collapse
You will get no arguments here. Much dialogue maybe, but no arguments. The word "radiation" in the scientific community does not have that negative connotation, but I see your point. Those that are afraid of this should read up on radon gas, as an aside. Radiation is not necessarily "bad". People love it when they use it to warm their food in a microwave or when it facilitates a phone conversation using 0.9, 2.4, and 5.8 GHz cordless phones. I agree with you about the ambiguity associated with this issue. In the scientific community, there is a great deal of contention as there is evidence to support both schools of thought. There is currently no conclusive evidence to support the premise that this "radiation" from cell phones is causing harm; however, there is not any evidence that eliminates it either. Suffice it to say, the jury is still out on this one IMNSHO. BTW I use Moto S9 and Moto H700 and I do not own a wired headset.
kinda related, searched for 'included adapter' and this is the only thread that came up..
i'm using the included adapter with a car kit (cassette adapter). music plays fine with this setup, however i noticed in calls a lot of the time the audio starts breaking up a little.. sounds like i have low signal, however I have full bars in H. i just started using it today, and only placed one or two test calls so far, maybe it was a one or two-off type thing?
I didnt read the whole topic but the bluetooth headsets ARE UGLY AS HELL... You can see a lot of morons walking around with those... Nothing personal...
I searched long for a mono headset and could not find one, I ended up cutting the other speaker away from stereo headset to get what I want. There is no 2.5mm or 3.5mm adapter that has mic in too...
BUT I found a reasonably priced mono headset from eBay sometime ago...
Here is the link to the auction I bought, the seller most likely has a lot more: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380066176311
Only 5$ a piece.. I bought 2 since I tend step on them and sh*t.. But I am still using the first one and they are good...
Loco5150 said:
I didnt read the whole topic but the bluetooth headsets ARE UGLY AS HELL... You can see a lot of morons walking around with those... Nothing personal...
I searched long for a mono headset and could not find one, I ended up cutting the other speaker away from stereo headset to get what I want. There is no 2.5mm or 3.5mm adapter that has mic in too...
BUT I found a reasonably priced mono headset from eBay sometime ago...
Here is the link to the auction I bought, the seller most likely has a lot more: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380066176311
Only 5$ a piece.. I bought 2 since I tend step on them and sh*t.. But I am still using the first one and they are good...
Click to expand...
Click to collapse
Thank you sir!!!!!!
No problem, glad I could help.
There are some videos floating on youtube showing Samsung Galaxy S Vibrant and Captivate having " death grip " , same as suffered by iphone 4.
you can check the videos on youtube
Samsung Galaxy S Vibrant and Captivate has internal antenna apparently located on the back of the phone, towards the very bottom edge. Can any1 here confirm me if Galaxy S is suffering from same issue
Any1 here facing this issue or its just a Apple fanboy gone crazy.
hi
i have used my phone a lot.. and i have never ever experienced this!
-TB-
No matter how many different ways I try holding my phone, I can't get the signal to drop.
it is yet another attempt from jealous iphone4 owner trying to make the SGS i9000 / HTD Desire / Moto Droid X looks bad
LOL
I've seen the videos, but I'm unable to replicate the behaviour..
Tried covering it completely with both hands in various ways, i can never get it to drop more than a single bar.
I did notice this the first day I received the phone: signal level drop from 4 to 1 or even zero bars when touching the entire bottom of the phone....doesn´t happen all the time, sometimes the indicated signal level stays the same....couldn´t figure out a pattern yet.
However, I have not once experienced a dropped call.....worst thing that ever happens is that the signal switches from 3G to GPRS - but then I have 4 bars again....
Can live with that....
I can easily replicate it with both my SGS phones when placing my palm over the back of the phone. This is in 3G mode and I haven't had any dropped calls yet so I'm not sure if it's an issue.
the only place i can replicate this "problem" is when i'm inside a subway station or inside a shopping center with too much metal beams.... say places like walmart and homedepot
by the way we do get cell signal inside subway stations, just weak.
so for reference a normal sony or moto handset non smartphone will be able to make a call perfectly fine, but when i was using the Treos I was never able to get a good signal
however when i upgraded to the HTC Athena i was able to make calls inside the subway station, now with the SGS no problem at all
Yes, I'm able to replicate the signal drop just like what they show for iPhone 4 in poor reception area only. I can also make the call drop out all together if the signal is already bad enough to begin with.
Note that in strong reception area it is also not possible to replicate the signal drop on iPhone 4, as shown by many YouTube videos, even if you do a death grip.
It's law of physics.
This issue does not bother me because I'll always use a case for my SGS.
All smartphones have this problem, didn't you guys listen to Steve Jobs?
lolz
yesterdays event was another publicity stunt by steve jobs
Hey now don't confuse this with the iphone 4 issue The difference here is the sgs doesn't do this by just bridging 2 pieces of metal, i.e. placing a single finger on the phone. You need to block the whole signal by covering it. I really doubt a case would have any effect on this as well. We are talking laws of physics vs a simple design flaw.
Cant really replicate it, but it can be a just signal representation bag.
I notice that sometimes I have like one bar, but if I go into setting and look at signal strenghts it can be exceptionally strong at the same time.
This just in..
Well... I put mine in a ledshielded box, padded it with sealhide (cause in Norway we have that laying around..) and swallowed it whole!
Bluetooth -> Working fine!
Camera -> Working Fine! (impressive really!)
Reception -> Working fine!
Todo:
* Testing swype whilst death-gripping the bugger!
eaglesteve said:
It's law of physics.
Click to expand...
Click to collapse
and some basic common sense
of course it seems like that is only applicable to people who are intellectual enough to understand physic of radio waves and its interaction with the environment.
I think there has been an explosive growth in the level of public awareness concerning the effect of environment and human hand on cell phones after the iPhone 4 issue. I didn't realize my old phones had the same problem until I started testing it both good and bad reception areas. Then I searched in net and found examples after examples of videos demontrating th problem on other phones posted ages ago.
..hmmmm.. interesting.. I tried my best to replicate the issue..
..and yeah.. i can make it lose signal strength.. down to no bars..
..here is where the problem arises.. i can still make a phone call to my GF..
..nope, i didn't use just my left hand to cover the back side of the phone..
..i used my entire 2 finger and palm.. so the answer is, it doesn't have the iphone 4 flaw.
..lefty? righty? no problem, you can hold the SGS both ways and will never drop your call.
..hope this clears out all those who is trying to make a bad press out of the SGS..
Indoors, with my back to the window and my body kinda shielding the phone, I can make it drop from -81 to -97 dbm, by covering the entire bottom back of the phone. I can make it drop down further to -105 dbm by also covering the bottom front. However, both those ways of holding the phone are unnatural and if I turn around and face the window(phone infront, still held between my two hands) it shoots back up to -81 dbm.
So, is there a problem? Not as far as I can tell. As long as I hold it normally it's unaffected.
Regards
dakine; said:
Hey now don't confuse this with the iphone 4 issue The difference here is the sgs doesn't do this by just bridging 2 pieces of metal, i.e. placing a single finger on the phone. You need to block the whole signal by covering it. I really doubt a case would have any effect on this as well. We are talking laws of physics vs a simple design flaw.
Click to expand...
Click to collapse
Actually I think SGS's problem is even more serious than iPhone 4.
I can reduce the SGS signal by 30 dBm consistently at home by merely placing it on my palm without even griping it. With iphone4, I think Anandtech's test reduce it by only 24dBm by death grip or bridging the metal. I have got a crude video showing this if you want to see it, but you should be able to replicate it yourself.
Hi guys,
last week I went for holiday in London.
At the airport, when leaving, before the x-ray checkin I used the phone and all worked fine, after the x-ray I looked at the phone and it was dead...it didn't switch on using the hang-off call button and nothing..they only way was to take away the battery and reinstall it...than It restarted wihtout problem....btw I thought that was some kind of bug and didn't give it too much importance.
Than when I come back, again before the check-in I used the phone without problem with the wi-fi airport, then check-in and when I tryed to switch it on again the phone was again dead!!! So I remember what happend just the week before when I was at the airport and start to think that when the HTC HD2 is x-rayed for some strange reason it stop working and freeze...and the only way to make it running again it's to take away the battery and reinsert...
The phone of my wife (a Nokia) hadn't any problem...and to be honest I never had problem with all my previous phone....(I had an HTC P3600 before and never had problem with x-ray).
So, did you have the same problem?
Luca
I had a succesion of devices fail on me. The only common factor was that each had been through airport security within 24 hours of failing. The scanner is supposed to be safe but make of this what you will. My HD2 has been through the same airport 3 times and it is still fine.
Your not actually supposed to expose any electronic device to any sort of radiation while it's turned on. Especially Gamma, xray or EM (electromagnetic).
I'm very surprised that they are making you xray your phone these days. It's been a little over 10 years since i was in an airport and back then they asked you to prove it worked by turning it on. I guess things have changed a bit since then.
As a case in point though, if your abit handy with computers take the side off, stick your phone in there and just very gently touch one of the chips on the motherboard. You'll notice your pc will hang. This is because the EM radition emitted from the GSM antenna screws with the chips on the motherboard.
So remember for next time. Turn your phone off and pull the battery till you get out of the immediate area of the xray machine
That's odd. I've been through many airports with many different phones and none have ever suffered as a result.
M3PH said:
Your not actually supposed to expose any electronic device to any sort of radiation while it's turned on. Especially Gamma, xray or EM (electromagnetic).
Click to expand...
Click to collapse
i seen a video some time ago on youtube where someone left their point n shoot camera in video record mode and put it though the xray scanner. you could visibly see "electrical noise" in the recorded video as it passed though the xray beam.
safe to assume this will happen in phone too, so any data being processed or written into ram or maybe even flash as the phone is bombarded with xrays has a potential for corruption. like you said its probably best to remove all power to any device with important info, or atleast reboot it afterwords just to make sure there isnt any corrupt data sitting in ram
actually now that i think of it dram is constantly being refreshed, so there's constant data between the chip set and ram modules. all kinds of chances for xrays to corrupt data there
So would it be best if we turn our HD2 off when passing through xray machine?
Everything gets x-rayed now, without exception. I always remove the batteries before security. Note that my airline only allows 2 spare (ie. loose) LiON batteries. I haven't been hassled by this.
enyaj said:
So would it be best if we turn our HD2 off when passing through xray machine?
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Click to collapse
Id suggest a battery pull, even when asleep the phone is still partially on, and the RAM is always active because it would loose data if it wasn't
d0ug said:
Id suggest a battery pull, even when asleep the phone is still partially on, and the RAM is always active because it would loose data if it wasn't
Click to expand...
Click to collapse
Slightly off topic but i feel sorry for those suckers that pass through those x-ray machines with the laptop they just put into standby or hibernate. Say good bye to the hard drive!
Strange. I'm a frequent flyer, my HD2 went through x-ray scanners many times, always on, and I have never experienced such problem...
M3PH said:
Slightly off topic but i feel sorry for those suckers that pass through those x-ray machines with the laptop they just put into standby or hibernate. Say good bye to the hard drive!
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Click to collapse
I dont see how xrays would damage the magnetic media any more so being on or off. I could however see the memory dump file being corrupted if the laptop was still in the process of hibernating as it passed though the xray beam, since the xrays would get at data being processed in the HDs onboard DSP, cache or bus cable
i would think there would be a better chance of xrays damaging data stored on flash memory and SSDs than magnetic media, especially as the lithographic processes shrink to create the flash memory chips
I dont understand why do hospital keep wasting funds on please turn of your mobile posters in the hospitals when people like you dont bloody read it and then go cry on XDA. You not meant to expose any phone to radiation!! jeez
seriously
evolutionqy7 said:
I dont understand why do hospital keep wasting funds on please turn of your mobile posters in the hospitals when people like you dont bloody read it and then go cry on XDA. You not meant to expose any phone to radiation!! jeez
seriously
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Click to collapse
Trust me the hospitals don't give a **** what their radiation producing equipment does to your phones or any other portable devices, they are worried about a 1watt maybe a little more transmitter inducing stray currents in their sensitive electronics.
Though you would think now a days they would take cellphones and other transmitting devices into account when developing medical hardware, especially when you consider how much hospitals pay for this hardware. I could see medical hardware in a hospital a decade and a half ago not being hardened against transmissions, since it was relatively uncommon back then. in my opinion it would be sheer incompetence from a hardware maker today not to take that into account and test for it when developing a piece of hardware.
There is also the added benefit that newer cell technology seems to induce less or no interference in other nearby equipment, and possibly use less transmit power. for example GSM/iDEN phones put next to audio equipment would almost always create noise from the signals. newer 3G/CDMA does not do this. I remember other technologies TDMA i think when placed near a CRT monitor would make the monitor look as if it were being degaussed
krzyzag said:
Strange. I'm a frequent flyer, my HD2 went through x-ray scanners many times, always on, and I have never experienced such problem...
Click to expand...
Click to collapse
Keep praying, you might stay lucky!
d0ug said:
I dont see how xrays would damage the magnetic media any more so being on or off. I could however see the memory dump file being corrupted if the laptop was still in the process of hibernating as it passed though the xray beam, since the xrays would get at data being processed in the HDs onboard DSP, cache or bus cable
i would think there would be a better chance of xrays damaging data stored on flash memory and SSDs than magnetic media, especially as the lithographic processes shrink to create the flash memory chips
Click to expand...
Click to collapse
SSD's were exactly what i was refering to but if a laptop is in hibernate mode then the RAM image is stored right at the start of the disk. If the drive has any power to it at all you run the risk of seriously damaging the electronics in it. Remember all disk drives -HDD's, SSD's etc - still have controller boards on them
d0ug said:
Trust me the hospitals don't give a **** what their radiation producing equipment does to your phones or any other portable devices, they are worried about a 1watt maybe a little more transmitter inducing stray currents in their sensitive electronics.
Though you would think now a days they would take cellphones and other transmitting devices into account when developing medical hardware, especially when you consider how much hospitals pay for this hardware. I could see medical hardware in a hospital a decade and a half ago not being hardened against transmissions, since it was relatively uncommon back then. in my opinion it would be sheer incompetence from a hardware maker today not to take that into account and test for it when developing a piece of hardware.
There is also the added benefit that newer cell technology seems to induce less or no interference in other nearby equipment, and possibly use less transmit power. for example GSM/iDEN phones put next to audio equipment would almost always create noise from the signals. newer 3G/CDMA does not do this. I remember other technologies TDMA i think when placed near a CRT monitor would make the monitor look as if it were being degaussed
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Click to collapse
Most UK hostipals are so underfunded that they are still using that ancient kit. It's only in the last 2 years that the newer kit has been coming in and the restrictions have started to shift. If your american then there is no issue. They are so overfunded they complain that they have no idea how to spend all the money
M3PH said:
Keep praying, you might stay lucky!
Most UK hospitals are so underfunded that they are still using that ancient kit. It's only in the last 2 years that the newer kit has been coming in and the restrictions have started to shift. If your american then there is no issue. They are so overfunded they complain that they have no idea how to spend all the money
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All medical equipment used in UK hospitals must be CE marked. The CE mark on this equipment means that it must be able to perform with out being effected by radio waves.
The original ban in UK hospitals was because of the old analogue mobile phones, that used to pump out their signal at full strength. Not once did they ban the pagers that the medics used or the walkie talkies that the porters used - and they really pump out a massive signal.
My mate was modify monitoring computers at patient's beds in and Intensive Care Unit. He made quite a few mobile phone calls and noticed that it didn't effect the monitoring equipment once. And this was done on the 9th to the 11th of September 2001.
d0ug said:
Trust me the hospitals don't give a **** what their radiation producing equipment does to your phones or any other portable devices, they are worried about a 1watt maybe a little more transmitter inducing stray currents in their sensitive electronics.
Though you would think now a days they would take cellphones and other transmitting devices into account when developing medical hardware, especially when you consider how much hospitals pay for this hardware. I could see medical hardware in a hospital a decade and a half ago not being hardened against transmissions, since it was relatively uncommon back then. in my opinion it would be sheer incompetence from a hardware maker today not to take that into account and test for it when developing a piece of hardware.
There is also the added benefit that newer cell technology seems to induce less or no interference in other nearby equipment, and possibly use less transmit power. for example GSM/iDEN phones put next to audio equipment would almost always create noise from the signals. newer 3G/CDMA does not do this. I remember other technologies TDMA i think when placed near a CRT monitor would make the monitor look as if it were being degaussed
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most digital signals are now shielded against in medical equipment.
Analog signals on the other hand (walkie talkie's)....
Ive never had any problems with x-raying the phone when i worked on an airport here in Sweden. I had to x-ray it every day before work.
Where I work, there isn't any equipment that can be harmed by phones. There are x-ray machines but nothing I own has been harmed by them. Then again, I don't go anywhere near them myself. If a a patient's phone is fried, tough. We do have signs saying that phone use is forbidden but not because they will cause damage.
No, the problem is patient's who answer their phone during treatment. You really wouldn't believe some of the situastions I been in when someone has whipped out their mobile and started talking (or tried talking; I work on the head end!) Worse still are some of the ring tones. A really loud scream coming from a pocket does nothing to steady my hand.
I work in an airport, have done for the last six years and everyday my phone goes through the xray machine.
Never thought about it before but will certainly start turning it off just in case.
Sitting here with a broken hand, had numerous xrays done, phone was in the vicinity and on standby. No problems so far (touch wood).
Hello all,
I wonder if I may ask your collective opinion. I've been an HTC user since the Desire and have had a One X for the last 2 years. I'm due to upgrade in a month on EE 4G in the UK and have decided to go down the Note 3 route.
I have a varied lifestyle which means I can be in a variety of quite different environments with different use profiles for my devices (how's that for jargon?).
I'm looking for some advice around the best options to protect and power my phone.
I run an industrial and agricultural engineering business, as such my working environment can change from extreme to office boardroom on a daily basis. Extreme can involve outside in the Scottish winter so cold and wet. Industrial means drop risk and impact and screen protection, scratch protection, solvent and oil protection. We also restore old land rovers so mineral oil on hands is a frequent risk as is scrabbling around on dirty garage floors. I need to protect the phone from this environment but also retain full functionality.
However, I also find myself in the corporate boardroom where I need smart and sleek and unobtrusive and don't really want an oil stained lump of rubber in the table or desk.
In addition, at home I have two young children who have sticky fingers, accident prone (I've replaced my wife's iPhone screen and case 3 times now, who help themselves to phones and tablets to play games etc. I don't mind thus too much as it keeps the little buggers off my alienware M18.
At work we frequently find ourselves in remote locations where signal can be patchy and offer away from power sources for a while so I'm also looking to iccassionally beef up the battery. The remote locations can gobble up battery with roaming increased and whilst I know you can adjust settings, it can be a pain in the butt to remember to do this.
Strikes me I need a rugged, oil proof case and screen protector with the option of an extended battery capacity both of which can be removed to return to stick when in the office/socialising etc. Something with a holster would be good as well so I can pick up without rummaging in pockets which all too often contain knives, screw drivers etc.
What would you recommend? I've seen a few different options but am getting to the confused stage!
Secondly, I've recently developed osteoarthritis in my left hand, this makes using a phone the size of a One X with one hand tricky so the Note 3 will be even more of a challenge. So annoying and painful is this I very nearly opted for an iPhone 5s and breaking my vow never to own an apple product as Jobs was the antichrst and I can't stand Apples hypocritical, smug, controlling, 'aren't we just so wacky and cool', twat, Bollox corporate image- just because it is skinny enough to be easier to hold in my left hand when used as a phone or thumb texting.
I then recalled...just a minute, these days there are a plethora of solutions for this problem, there is no need to sacrifice my deepest principles!
Now I'm not a huge fan of Bluetooth ear sets they don't sit well with helmets, goggles, spectacles etc. So I have been interested to see the Galaxy Gear watch which looks like it might be an option despite the fact that I don't necessarily want to be bothered by phone and text all the time...sales calls, the bank, irate customers etc....
Question is...is the current GG watch worth getting or am I better waiting six months for the new one? I'm not sure if the latest one is waterproof and shockproof as most reviews tend to be about its gadgetry rather than its construction as a watch.
Lastly, I do a lot of miles behind the wheel in different vehicles, from family and work cars to vans and classic cars. Is there a decent generic vehicle dock avaliable for this phone, one which can be moved between vehicles easily and which allows me to easily access the phone as well as spotify and audible. I've gone back to my Garmin sat nav as in the uk anyway, Google maps app went from brilliant to utter push about six months ago. I've list count of the cash I have wasted on various phone mounts for cars and given the huge size of the Note 3 am thinking about somthing specific.
Thanks in advance for wasting valuable time pondering the best way forward for my hectic lif. I'm determined not to trash thus phone and secondly, to actually get the best out of its productivity as I'm getting busier and busier and need to use the devices smarter, one if the reasons I don't is the environment challenges.
Cheers
Rich
Sent from my HTC One X using Tapatalk