2 PBs side-by-side: different strength for wifi signal
- I just got my new 64GB PB.
I had a feeling my good ol' 16GB had a problem with wifi.
My PBs are side-by-side.
The 64GB shows 4 bars on wifi signal.
The 16GB shows 1 tiny barely visible bar...
I should really verify whether I could send my 16GB for repair. That's my feeling. Or could it be normal that my old one is less powerful for catching the signal for some reason?04-05-13 08:53 PMLike 0 - You can get better WiFi information by going to the gear: gear/wifi>? In lower bar>diagnostic ↓ WiFi Information.
I have a Nexus 7 and a Playbook side by side.
Playbook: -78 dBm one bar 65 Mbps
Nexus 7 : -78 dBm one bar 13 Mbps
This is for a small router on g 2.4 with the router 40 feet away through two walls. This is a poor to fair signal. Close to the router the signal would be excellent at about -40 dBm. The -40 dBm is 10000 times as strong as the -80 dBm. Am attaching a screen shot from Wikipedia for reference.04-06-13 01:44 AMLike 2 - All right.
Old PB: -97dBm
New PB: -61dBm
varies a few digits if I move them a couple of feet.
Both are 54 Mbps.
Both are out of typical range then from your wiki ref. About 15 feet from router, 2 walls, one thin, one insulated.
edit:
right by router:
Old PB: -53 dBm
New PB: -36 dBm04-06-13 08:34 AMLike 0 - From what I've read not all PBs are created equal, that is there are 2 to 4 different main boards used depending on when each PB was produced which can cause a difference not in just signal metrics but actual performance as well. I think the same can be said for anything coming out of a factory. Case lots of chips and components can vary from one production run to another yet still be within advertised specs. Don't expect two cars coming from the same production line to act and perform exactly alike either.04-06-13 04:59 PMLike 0
- @Sildjian71: Do you mean I should endure weak connectivity and low performance? This PB does not catch signal where the other one does, further away from the router. It always was frustrating to use as it had a frequent disconnections issue and varying (unstable) performance with wifi.
@xamdam: On the website they seem to imply that I only have 3 months after purchase to consult with them. Contact Us - Canada
I would get this repair done if needed on the extra year warranty purchase with credit card gives you. I could be close to 2 years from date of purchase now. Would have to find my invoice...
Anybody been there? Can I really speak with someone from BlackBerry? I thought they were unreachable...04-06-13 07:03 PMLike 0 - All right.
Old PB: -97dBm
New PB: -61dBm
varies a few digits if I move them a couple of feet.
Both are 54 Mbps.
Both are out of typical range then from your wiki ref. About 15 feet from router, 2 walls, one thin, one insulated.
edit:
right by router:
Old PB: -53 dBm
New PB: -36 dBmLast edited by jpash549; 04-07-13 at 01:05 AM.
04-06-13 10:30 PMLike 0 - The 16 GB one used to drop signal (disconnect from the network) constantly when I had got to about 30 saved networks. This dropping seems to be solved since I deleted most saved networks on PB and Torch.
I will have to be more attentive to wifi signal associated to -91 but I think it wouldn't be wrong to say I just had the dot...
Both PBs out of case. I have to install Otterbox case on the old one that I'll make available for my child but I need time to do it cleanly and apply powder between screen and case window. You would think this case would affect signal catch at all? That would be even worst!04-07-13 08:45 AMLike 0 - The 16 GB one used to drop signal (disconnect from the network) constantly when I had got to about 30 saved networks. This dropping seems to be solved since I deleted most saved networks on PB and Torch.
I will have to be more attentive to wifi signal associated to -91 but I think it wouldn't be wrong to say I just had the dot...
Both PBs out of case. I have to install Otterbox case on the old one that I'll make available for my child but I need time to do it cleanly and apply powder between screen and case window. You would think this case would affect signal catch at all? That would be even worst!04-07-13 09:55 AMLike 0 -
Just as in radio reception the antenna used on the device receiving the signal must be designed to have high efficiency in receiving the signal. The software uses the signal received to calculate an estimate of the true signal intensity at that point. Presumably the software calculation includes a correction factor for antenna efficiency as realized inside the device. If the device antenna is not performing as expected the estimate of the true efficiency could be greatly in error. Thus the 16 GB device , which is thought to have a defective antenna , reports a much lower estimate of the true power intensity of the signal at the same point as the 64 GB unit gives a much closer estimate. Using a laboratory measuring instrument which has been calibrated would provide a much more accurate value but this is certainly unnecessary for our purposes.
Disclaimer: Although I admit to being an engineer I do not have training in this field or special knowledge in how the BB OS or Playbook hardware approach this matter. Thus I welcome any corrections to my interpretations.Last edited by jpash549; 04-07-13 at 01:21 PM.
04-07-13 12:55 PMLike 2 - An interesting game you might try to increase signal strength is to use a parabolic reflector which concentrates an omnidirectional router signal into a directional signal. This can also help keep your signal from being wasted on your neighbors. A simple example easy to make from aluminum foil is shown on You Tube and I'm sure you can easily find others. The signal collection idea could also be used with your tablet at the focus of a parabolic dish. Gotta get my taxes done then I might try it myself.
purple_bb likes this.04-07-13 10:58 PMLike 1 -
Anyone been there before?04-08-13 08:31 AMLike 0 - After all, it was my initial question. It could be too that even after sending for repair I get the verdict that the PB works fine. Never know. I just didn't know how to compare with actual values the strength of signal on my PBs.... Glad I learned here how to evaluate that.04-08-13 08:44 AMLike 0
-
The PB has a one year warranty to the original purchaser. It also has 90 free Tech support. I do not know how Rim deals with "quasi-tech support v. warranty"
Rim Support
Tel:
Canada Toll Free: 1-877-644-8405
United States Toll Free: 1-877-644-8410
Puerto Rico Toll Free: 1-855-651-4936
Email: [email protected] (this route generally does not work and a call is necessary)
(UK Support) 0800 096 2805
Playbook French Support
Smartphones BlackBerry & Tablette Tactile - Mod�les de BlackBerry FR - France
Phone : 0800 914 533 (within 90 days from activation)
BlackBerry� Customer Support Center
Austria:0800-297-476
Belgium:800-77-980
RIM (Brasil Support toll free number): 0800-022-3161
Bulgaria: 00800-118-1115
Denmark: 802-50198
France: 800-914-533
Germany: 800-181-6530
Italy: 800-789-272
Luxembourg: 800-2-2187
Netherlands: 800-022-7316
Norway: 00-1-647-426-7058
Poland: 00-800-112-43-59
Portugal: 800-827-760
Russia: 8-800-100-9643
South Africa: 0800988892
Spain: 900-866-969
Sweden: 02-079-4448
Switzerland: 0-800-802-492
United Kingdom: 08000962805
Phone-Numbers of BlackBerry PLAYBOOK- Helpdesks...
Germany: 0800 1816530 (Geb�hrenfrei)
North-America: 1 877 255 2377 (Toll Free)
UK: 0808 100 7466 (Toll Free UK only)
Outside UK: +44 1753 558400
Worldwide: 1 519 888 6181
[email protected]
(BTW: Helpdesk for BlackBerry devices -except PlayBook- for Germany:
0180 3302626)purple_bb likes this.04-08-13 09:14 AMLike 1 - An interesting game you might try to increase signal strength is to use a parabolic reflector which concentrates an omnidirectional router signal into a directional signal. This can also help keep your signal from being wasted on your neighbors. A simple example easy to make from aluminum foil is shown on You Tube and I'm sure you can easily find others. The signal collection idea could also be used with your tablet at the focus of a parabolic dish. Gotta get my taxes done then I might try it myself.
04-08-13 09:56 AMLike 0 -
Putting the blocking comment in my earlier post was an aside. Mainly the response was a suggestion on a way to possibly improve signal strength at the user's location.04-08-13 01:16 PMLike 0 - After all, it was my initial question. It could be too that even after sending for repair I get the verdict that the PB works fine. Never know. I just didn't know how to compare with actual values the strength of signal on my PBs.... Glad I learned here how to evaluate that.
Mine has the flush power button (@#$%!). My wife's has the normal button.:-)
Holding them side by side, hands in as nearly identical positions as possible, both set to 2.4 GHz and same channel first within 4 feet of the Netgear WNDR4500 router the "Gear" readings are -34 dBm for mine and -35 dBm for the other. Moving down two hall corners with one wall between, the reading were -58 dBm and -59 dBm respectively. The conclusion I draw from this is the same as you have drawn: your 16 is bad and the 64 is good.
Unfortunately, I can't give any assurance that RIM/BB will fix it at no charge.purple_bb likes this.04-08-13 05:02 PMLike 1 - @tofnow
So funny to read about the flush power button! I never ranted about it but it sure made my life more stressful all this time. I thought the new one was more easy-going but never realized it was a default on my old 16 GB!
Thanks for supporting the bad 16 GB theory. It will help boost my confidence when I call RIM. I'm not worrying about paying. I paid this baby PB of mine Visa and they (visa) kindly extend the warranty one year. Now if I can find that invoice!04-08-13 05:26 PMLike 0 -
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2 PBs side-by-side: different strength for wifi signal
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