Losing Express Speed and Signal

Hello,
I having been successfully using the Express base station to support a desktop and laptop simulaneously. However, I recently moved both computers to the same room. When both computers are on, my laptop is losing the strength of signal from Express until the signal is finally lost and my Airport icon at the top of my screen is grayed out. The desktop isn't affected.
Any ideas as to what is going on? I have cleared the history and caches in both browsers and I have a cable modem connetion.
Thanks.
lsb

There is a different between the srx200 and the plain srx from what I read. The one for larger homes and offices appears to be the srx NOT the srx200 which is only 2x farther range while the srx is 3x the range.
Does anyone know if the wireless g range expanders will work with these srx signals? I currently have a wireless adapter off of a router and then to an expander. It all works fine but would like to replace the router and access point to gain the speed but would also need to keep using the expanders if possible to reach some difficult spots

Similar Messages

Anyone have intermittently lost internet connection, poor network speed and signal with new Time Capsule?

I just bought the new TC with 2gb HD. Replacing 1st Gen Airport Express. I have all the latest firmware and hardware updates. Using: iMac, multiple macbooks and airbooks, multiple iPads, android tablets, iPhones. With the new TC, I have less than impressive range and speed and my internet connection keeps disappearing intermittently. Restarts of my cable modem and the TC sometimes help. This all started with addition of new TC. I have suffered similar episodes in the past with old APE with new firmware updates. Anyone else seeing these problems? I have heard a lot of people say the new TC drastically improved their network range and speed.

The TC is failing and this happens at times with cable or fibre connections due to the WAN port having issues.
The Express uses 100mbit ethernet ports and does seem to have less issues. On the TC the gigabit is sometimes confused. If you have a small swtch around try using that between the fibre connection and the TC.
If you are using a patch cable to a wall outlet.. the other thing you can try is a crossover cable.. these are still readily available and it has helped for some people.
Do a factory reset of the TC.. and then see if you are getting the public IP onto the WAN port.
If you do there are some other issues that happen so if you can.. give us a screenshot of the wan settings you are getting in the airport utilty.
You can just cover the last few digits of the public IP.. although unless it is static it will change anyway.

Two questions concerning Airport Express (speed and disconnecting)

Hello, thanks for any reply.
1) I currently have an Airport Express hooked up to a modem. My experience with it is somewhat lackluster however. The speed can fluctuate sometimes, going from decently fast (although I don't think very fast at all) to qute slow. Also, I more often than not have to reboot the Airport Express (by unplugging and replugging in).
What happens is the green light is on, but my wireless signal (top right of MacBook Pro screen) is empty. I click on it and try to find my signal, which is listed. I then click on that, but nothing happens, and it tells me I cannot connect to it. I then have to unplug and then plug in the Airport Express and wait for it to reboot, which solves the problems but is rather annoying. Any help on how to stop this would be great.
2) I am caught inbetween whether I need to upgrade the Airport Express anyway, into a router with a wired ethernet port. I am utilizing the USB printer and obviously the only port to connect to the modem, but the only way I can hook into my system that does not have wireless capabilities (Xbox 360), I need to unplug the wire from my Airport Express, plug it into my console, and then restart the router, and then do the same thing except with the Airport Express to obtain connection (both are unfortunately mutually exclusive).
The reason I mention that is because I am considering different speed options too. I apologize for my lack of savvy on the subject, but quite simply: Does the Airport Express create the fastest wireless connection out there? Does the Airport Extreme (with wired ports) create a faster connection? When it comes to the Airport Extreme, does that card (I see it in the store section, but I still don't understand it) make the connection much better? Does that card help for an Airport Express?
Thank you so much for answering my questions, I really appreciate it.

Can you further explain the notion of interference, does that mean other wireless signals? I have many that my computer detects, so would this slow down my connection?
Yes any wireless signals at 2.4 GHz will cause interference for the AX. This can be from wireless networks or other devices.
Also, in terms of the 802.11n clients, I know that my computer supports it (From Utilities > Network Utility), but does that mean that the Airport Extreme card is not a factor?
That means that your Mac can connect to 802.11n networks.
Can you please detail what that card functions as.
?? Don't know what you mean by that.
...do you think that the Airport Extreme is then totally worth it, just to clarify.
If you have 802.11n devices and do large transfers between them, then the 802.11b/g/n AEBS could be useful.
If you want to use the AEBS as a file server, then the 802.11b/g/n AEBS would be worth it.

TS1398 My ipad3 seems to have connection issues. It is wifi only but keeps losing the connection and is really slow in loading pages - a bit like dial-up speed! My iPhone 4s and daughters' ipad2 have no problems at all. Any ideas anyone?

My ipad3 seems to have connection issues. It is wifi only but keeps losing the connection and is really slow in loading pages - a bit like dial-up speed! My iPhone 4s and daughters' ipad2 have no problems at all. Any ideas anyone?

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

AirPort Express Base Station signal drops on and off

My Airport Express Base Station signal drops on and off about every 2 minutes. It’s quite frustrating. I currently have a Windows XP PC, with a Linksys Wireless Router. I’ve taken several steps as prescribed in the support chats to no avail. I’ve switched channels, updated software/firmware (iTunes, Base Station and my Router), reconfigured my security settings to no security back to my regular security settings, I’ve placed the base station right next to my router in case it was due to interference, I’ve used headphones in the event it was my stereo, I’ve changed different utility settings (interference robustness, stream size, etc). I’ve opted to use the option “Create a Wireless Network” versus “Existing Wireless Network” and back to “Existing Wireless Network”. Again, all to no avail. Can someone offer some insight to help solve this problem? The problem is so annoying that I no longer use the base station.
Thanks in advance,
Rene
AirPort Express Base Station Windows XP

Maybe Windows is trying to get an 802.1x authentication which should be disabled:
Ensure that the Enable IEEE 802.1x authentication for this network check box is not checked.
http://www.efelix.co.uk/tech/1010.html
It seems updating Windows XP to Service Pack 2 fixes that.

Airport Extreme & Express "extended" but signal is still weak

I have a brand new Airport Extreme 802.11n and an old Airport Express 802.11g
Airport Extreme is set to "extend wireless network"
Airport Express is set to "join a wireless network" - green light is on and says its connected to the network.
Airport Extreme is downstairs at home, Airport Express is upstairs. Also have Apple TV upstairs.
Apple TV is only getting a two bar signal at the moment from Airport Extreme (and takes forever to transfer files from main computer downstairs). Want to extend network by plugging in Airport Express upstairs and getting stronger signal for Apple TV.
Yet when I plug in Airport Express upstairs - right next to Apple TV - and the green light is on, etc. Apple TV still is only getting two-bar signal - so it appears it's not picking up "extended network" via Express.
Isn't this how an extended network is supposed to work or do I have it all wrong?
THANKS!

Joining a network using the older "b/g" model will not extend the network.
In the case you describe, your Apple TV is connected to the main base station and so is your Airport Express. The Apple TV cannot connect to the Airport Express.
Also, if you do set up the WDS, you would want to put the Airport Express about half way between your main base station and the Apple TV...
If you want to stay with your old Airport Express, you will have to set up a "WDS" network on both devices. However, the speed of your network will be cut down to 54mbps instead of 130 on 2.4GHz band or 300 on the 5GHz band.
I replaced my older Airport Express units with the newer "n" models.
See this Apple doc on how to set up WDS for the older units.
http://support.apple.com/kb/HT2044?viewlocale=en_US
Also see this document.
http://support.apple.com/kb/HT1515

Very slow broadband speed and random disconnection...

I have a problem with my home hub and broadband connection. The download speed is ridiculously low at only 768 kbits per second. I have been running speed tests all week and the speed has been getting gradually slower and slower starting at around 1.4mbits and lowering to between 0.4 and 0.8 mbps.The broadband is also losing connection every so often.
This has been happening for a few weeks now, ever since the broadband and phone lights on my Hub turned orange, then continually flashed orange, went green then went off and then back to orange, flashed orange, then green then off and this cycle repeated until I restarted my Hub. Upon restarting the power light turned solid red and did not change. So I restarted it again. This time it rebooted properly (or so it seems to have). Before this the hub was (still slow) around 2mbps although this was much better than the speed now.
I have a BT home hub version 1.5. I am on Bt Broadband option 3 meaning I should have unlimited broadband. Reason why I am asking for help is I am getting lag when ever I play games on My xbox 360 or browse on my laptop. Im in scotland, dundee in the DD2 post code area if that matters.
I have not tried plugging directly into the main telephone socket yet but as I have been using BT for well over 4 years and not had as little speed as this Im doubtful its due to interferance.
Any help would be fantastic. I just want to be able to play my **bleep** xbox again
Here is the DSL information. I have recently restarted my Hub (due to the broadband cutting out again). This is why the uptime is so low.
DSL Connection
Link Information
Uptime:   0 days, 0:29:27
Modulation:   G.992.1 annex A
Bandwidth (Up/Down) [kbps/kbps]:   448 / 768
Data Transferred (Sent/Received) [MB/MB]:   19.28 / 20.58
Output Power (Up/Down) [dBm]:   12.5 / 13.5
Line Attenuation (Up/Down) [dB]:   27.5 / 47.0
SN Margin (Up/Down) [dB]:   23.0 / 13.5
Vendor ID (Local/Remote):   TMMB / IFTN
Loss of Framing (Local/Remote):   0 / 0
Loss of Signal (Local/Remote):   0 / 0
Loss of Power (Local/Remote):   0 / 0
Loss of Link (Remote):   0
Error Seconds (Local/Remote):   0 / 0
FEC Errors (Up/Down):   0 / 1,216
CRC Errors (Up/Down):   0 / 0
HEC Errors (Up/Down):   0 / 0
Line Profile:   Interleaved
Aut inveniam viam aut faciam

Quick update: Well, I moved my hub and have plugged it into the master test socket... Couldn't connect at all wirelessly, so I had to phone up the BT helpline, they changed the wireless channel and I got on after that (however the assistant said that my plugging into the socket should not have disabled the wireless.) As for the speed, well, needless to say there is little to no improvement. I cannot post my DSL stats, as I cannot even connect to my home hub via the ip address and the bthomehub.home address as the connection times out.
The speedtester on the other hand is working. Here are those results:
1. Best Effort Test: -provides background information.
Download Speed
409 Kbps
0 Kbps
500 Kbps
Max Achievable Speed
Download speedachieved during the test was - 409 Kbps
For your connection, the acceptable range of speedsis 100-500 Kbps.
Additional Information:
Your DSL Connection Rate :4704 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 500 Kbps
The throughput of Best Efforts (BE) classes achieved during the test is - 8.62:28.39:63.06 (SBE:NBEBE)
These figures represent the ratio while sententiously passing Sub BE, Normal BE and Priority BE marked traffic.
The results of this test will vary depending on the way your ISP has decided to use these traffic classes.
2. Upstream Test: -provides background information.
Upload Speed
307 Kbps
0 Kbps
448 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 307 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 448 Kbps
I have noticed that the DSL downstream speed has shot up remarkably (by about 4000) since plugging it in to the test socket, but for some reason, the IP profile is still very low, I would have expected it to have went up at least a little but it has remained the same for the past 2 days now should I be concerned with this or give it some more time?
Oh and I have an engineer coming to the house on friday, turns out when my parents were installing the broadband accelerator they inadvertently knocked out the wires to the extensions and now none of the extensions in the house are working so I hope he or she can resolve things with my speed and I will update on Friday evening, and again next Wednesday(after the 5 day period) to see if the IP profile speed has improved.
Aut inveniam viam aut faciam

Questions and answers on DLM, sync speed and real ...

I was confused about some DML details and posted on a BE forum (https://avatar.bethere.co.uk/forum/viewtopic.php?t=43542) and got what was to me an incredibly helpful response from Tom (drsox). I thought it would be of interest to some readers here so copy it below. Once again, many thanks Tom.
1) FTTC DLM applies only between the cabinet and the modem?
>> Yes, as there isn't any broadband / data signal going anywhere further down the line to the exchange if you are on FTTC!
2) What are the different parameters that apply on this hop? I know there is a current sync speed, a current snr, a target snr and an ip profile. Anything else?
>> The IP profile isn't really related to DLM, it just "follows" your sync rate. In the past the IP profile would take up to 3 days to "follow upwards", leaving you with a high sync and awful speeds! This has been changed now on 21cn and "RE-ppp"ing (rebooting the router) would force the IP Profile to update instantly.
DLM changes the SNR target. So where BE have hard coded / set SNR targets such as 3db, 6db, 9db, 12db etc.. They only change upon user request. BT use their DLM system where line instability or line error counts are collected and analysed, the SNR target and interleaving settings are then modified in increments to try and stabilise the line.
This image shows quite well how, over a 6 day period, BTs DLM noticed that my line fault was fixed. I didn't get the full speed back for a week.
3) Is the ip profile the same as the BRAS profile?
>>Yes
4) The DLM keeps statistics of errors etc to dynamically change the ip profile?
>> Changes the SNR target and interleaving for the line which will reduce the speed, and therefor the IP profile.
5) There is a general theory that the DLM is incapable of telling the difference between an error and a modem power cycle, so that power cycling can cause your profile to lower. Is that correct?
>> Yes, if you resync / power cycle your router multiple times in a day it is likely to try and "combat the line errors" and reduce your sync rate by increasing the SNR and / or interleaving on the line.
6) Can other connections and disconnections have the same effect? For example, if I reboot the router (where this is separate from the modem)? Or use the router interface to disconnect/reconnect the broadband?
>> PPP drops (router reboots while leaving the BT Openreach VDSL modem on and connected) won't affect DLM. The IP profile will match your sync rate upon reconnection of the PPP session.
7) If you have a low ip profile, does this mean that the sync is limited to the ip profile?
>> Other way around, if you have a low sync rate then the IP profile will match the sync rate. If you get an awful sync rate and the IP profile follows downwards, then you resync higher but the router "keeps the PPP session open" (which is possible if you resync quick enough) then your IP profile will stay low, even though the sync is high. Until you reboot your router or disconnect and reconnect the PPP session.
8) Can the sync rate change dynamically without a reconnection? If the ip profile gradually rises, will the cabinet force a resync to make sure the customer is actually getting the benefit of the higher ip profile, or must the user intervene with a modem resync?
>> See above - Sync can rise without affecting the IP Profile and the cabinet does not force a RE-PPP.
8) As I understand it, if the ip profile gets stupidly low for some reason, it can only be reset by BT wholesale? This will only be done after a visit to your home and a telephone call from the engineer to the BT wholesale central admin?
>> Mixed reports plus I don't think people understand the difference between sync speeds, line faults, the delay in DLM increasing sync after a fault.. I expect half the reports on the BT forum are not related to a stuck BRAS / IP profile. It is possible for the ISP or a BT engineer to reset the IP profile and possibly DLM training.
9) (8) This applies to all ISPs using BT Wholesale: some may be more willing to force this process to happen on behalf of their customers, but none can cirumvent it?
>> GEA providers (I believe) still have DLM but don't have BRAS / IP profiles unless they implement their own.
10) Who sets the snr? As I understand it, the customer has no direct control. Is this different for different ISPs?
>> Mixed information again, I believe that BT Wholesale give providers DLM override controls and SNR settings but none? (or few) ISPs use this system.
11) Real download/upload speeds are physically limited by the sync rate. They are also naturally limited by local limitations (such as wireless connections), server limitations, and congestion at various points along the route? Any more? The congestion along the route will vary bewteen ISPs as they use different routes with different capabilitues.
>> It is possible for BTs regional or local cabinet network to become congested. Supposedly the minimum speed you should achieve over the BT part of the network is 15mbps. ISPs such as Plusnet, BT etc.. then layer their own "discriminatory" traffic management on top of that (ie, slow down torrents etc.).
12) Real speeds are 'unnaturally' limited by throttling. This will also vary from ISP to ISP. Sky claims to have none, and BT none except for p2p. PlusNet and John Lewis have significant (but well explained)throttling. All the more expensive operators have none.
>> What you said
13) The ip profile affects the sync rate, and therefore actual speeds. Does the ip profile effect actual speeds in any other way?
>> Not quite right. The IP profile directly affects the speeds you can achieve but the sync rate affects the IP profile. The sync rate is determined by the stability and quality of your line and what DLM thinks it can cope with.
14) Many people (including AndrueC above) report real speeds from speedtests that are consistent and not close to the ip profile. These can't be explained by congestion (that would make them inconsistent). They can't be explained by server limitations, as they are consistent accross servers and the same servers give better speeds to other people. They can't be explained by local limitations, too many people claim sudden drops where the local conditions have not changed. They should not be able to be explained by throttling, as they as seen for many ISPs who do not throttle (I don't hold with the ISP lying theory here). What other factors are there that can explain these cases?
>> AndrueC and some other Sky customers have strange symptoms where speeds are around 20mbps rather than the full sync speed. The only logical explanation is either local cabinet congestion, contention between BT and the provider's network (not enough investment by the provider) or artificial traffic management on the providers side. It is also possible that the router that the customer has attached to their line is unsuitable for the higher speeds. For example an old ethernet router may only be able to cope with 20 or 30mbps! A friend of mine has a TP-Link ethernet router running Tomato on a BT 80mbps service but the TP-Link's CPU limitation causes his service to only perform at around 68mbps; he has a replacement router on order. (Obviously wifi will significantly reduce performance).
15) If you get a stupidly low ip profile, how long can you except it to take before it climbs to something more reasonable? (eg in my particular case, my profile is currently around 15Mb, and from BT service line tests should be around 58Mb). And the classic question, is it best to power cycle the modem (1) never, (2) occasionally (how often) or (3) never if at all possible? Mine did jump from 3.5Mb to 15Mb on one power cycle. Was that just coincidence?
>> My FTTC line took about 6 to 7 days to go from 40mbps to 80mbps after a line fault. It is possible that your 3.5mbps to 15mbps increase was the "re-ppp" affecting the BRAS profile and that your sync had slowly been increasing over time.

what a waste of money sending an engineer to "fix a fault" which does not exist. Precisely.
In my original BE post to which Tom so helpfully responded, I began: It seems to me that DLM is an excellent concept with a highly flawed implementation, both technically and administratively. I think that sending out an engineer to fix an obviously flawed profile is the main example of an adminastrative flaw. I understand (I can't remember source, maybe Tom again) that they are sometimes relaxing the requirement for a visit before reset.
Maybe the DLM system is too keen on stability vs speed. This will keep complaints down from many people: most users won't notice speed too much as long as it is reasonable, but will be upset if their Skype calls and browsing are being interrupted too often.
However, it does lead to complaints from people who notice the drops after an incidence (as in your thread that has drawn lots of interest), or who only get 50 instead of 60. The main technical flaw is that DLM can so easily be confused by drops from loss of power, too much modem recycling, etc, and then takes so long to recover.

Intermittently losing pop smtp and isp connection

Intel Mac Mini, Mountain Lion, 8 GB RAM
Intermittently losing pop, smtp and sometimes isp connectivity.
Can ping to IP address, not to isp name
Same for wired and wireless connection
Other Macs on network do not have the same problem
ISP says no POP or nameserver issues
Have:
run hardware diagnostics - all OK
disk utility -> repair disk - no issues
memtest - no issues
Onyx full maintenance and cleaning - no issues
Erase HD, fresh media re-install, time machine restore
started to lose sanity

1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem.
2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
3. Below are instructions to run a UNIX shell script, a type of program. All it does is to collect information about the state of the computer. That information goes nowhere unless you choose to share it. However, you should be cautious about running any kind of program (not just a shell script) at the request of a stranger on a public message board. If you have doubts, search this site for other discussions in which this procedure has been followed without any report of ill effects. If you can't satisfy yourself that the instructions are safe, don't follow them. Ask for other options.
Here's a summary of what you need to do, if you choose to proceed: Copy a line of text from this web page into the window of another application. Wait for the script to run. It usually takes a few minutes. Then paste the results, which will have been copied automatically, back into a reply on this page. The sequence is: copy, paste, wait, paste again. Details follow.
4. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
5. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply.
6. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in the browser window, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
Triple-click anywhere in the line of text below on this page to select it:
PATH=/usr/bin:/bin:/usr/sbin:/sbin; clear; Fb='%s\n\t(%s)\n'; Fm='\n%s\n\n%s\n'; Fr='\nRAM details\n%s\n'; Fs='\n%s: %s\n'; Fu='user %s%%, system %s%%'; PB="/usr/libexec/PlistBuddy -c Print"; A () { [[ a -eq 0 ]]; }; M () { find -L "$d" -type f | while read f; do file -b "$f" | egrep -lq XML\|exec && echo $f; done; }; Pc () { o=`grep -v '^ *#' "$2"`; l=`wc -l <<< "$o"`; [[ l -gt 25 ]] && o=`head -n25 <<< "$o"`$'\n'"[$((l-25)) more line(s)]"; Pm "$1"; }; Pm () { [[ "$o" ]] && o=`sed -E '/^ *$/d; s/^ */ /; s/[-0-9A-Fa-f]{22,}/UUID/g' <<< "$o"` && printf "$Fm" "$1" "$o"; }; Pp () { o=`$PB "$2" | awk -F'= ' \/$3'/{print $2}'`; Pm "$1"; }; Ps () { o=`echo $o`; [[ ! "$o" =~ ^0?$ ]] && printf "$Fs" "$1" "$o"; }; R () { o=; [[ r -eq 0 ]]; }; SP () { system_profiler SP${1}DataType; }; id -G | grep -qw 80; a=$?; A && sudo true; r=$?; t=`date +%s`; clear; { A || echo $'No admin access\n'; A && ! R && echo $'No root access\n'; SP Software | sed '8!d;s/^ *//'; h=(`SP Hardware | awk '/ Id/{print $3}; /Mem/{print $2}'`); o=$h; Ps "Model"; o=$((h[1]<4?h[1]:0)); Ps "Total RAM (GB)"; o=`SP Memory | sed '1,5d;/[my].*:/d'`; [[ "$o" =~ s:\ [^O]|x([^08]||0[^2]8[^0]) ]] && printf "$Fr" "$o"; o=`SP Diagnostics | sed '5,6!d'`; [[ "$o" =~ Pass ]] || Pm "POST"; p=`SP Power`; o=`awk '/Cy/{print $NF}' <<< "$p"`; o=$((o>=300?o:0)); Ps "Battery cycles"; o=`sed -n '/Cond.*: [^N]/{s/^.*://p;}' <<< "$p"`; Ps "Battery condition"; for b in Thunderbolt USB; do o=`SP $b | sed -En '1d;/:$/{s/ *:$//;x;s/\n//p;};/^ *V.* [0N].* /{s/ 0x.... //;s/[()]//g;s/(.*: )(.*)/ $\2$/;H;};/Apple|Genesy|Intel|SMSC/{s/.//g;h;}'`; Pm $b; done; o=`pmset -g therm | sed 's/^.*C/C/'`; [[ "$o" =~ No\ th|pms ]] && o=; Pm "Thermal conditions"; o=`pmset -g sysload | grep -v :`; [[ "$o" =~ =\ [^GO] ]] || o=; Pm "System load advisory"; o=`nvram boot-args | awk '{$1=""; print}'`; Ps "boot-args"; a=(/ ""); A=(System User); for i in 0 1; do o=`cd ${a[$i]}L*/Lo*/Diag* || continue; for f in *.{cr,h,pa,s}*; do [[ -f "$f" ]] || continue; d=$(stat -f%Sc -t%F "$f"); [[ "$f" =~ h$ ]] && grep -lq "^Thread c" "$f" && e=\* || e=; echo $d ${f%%_2*} ${f##*.} "$e"; done | sort | tail`; Pm "${A[$i]} diagnostics"; done; [[ "$o" =~ \*$ ]] && printf $'\n* Code injection\n'; o=`syslog -F bsd -k Sender kernel -k Message CReq 'GPU |hfs: Ru|I/O e|last value [1-9]|n Cause: -|NVDA\(|pagin|proc: t|SATA W|ssert|Thrott|timed? ?o' | tail -n25 | awk '/:/{$4=""; $5=""};1'`; Pm "Kernel messages"; o=`df -m / | awk 'NR==2 {print $4}'`; o=$((o<5120?o:0)); Ps "Free space (MiB)"; o=$(($(vm_stat | awk '/eo/{sub("\\.",""); print $2}')/256)); o=$((o>=1024?o:0)); Ps "Pageouts (MiB)"; s=( `sar -u 1 10 | sed '$!d'` ); [[ s[4] -lt 85 ]] && o=`printf "$Fu" ${s[1]} ${s[3]}` || o=; Ps "Total CPU usage" && { s=(`ps acrx -o comm,ruid,%cpu | sed '2!d'`); n=$((${#s[*]}-1)); c="${s[*]}"; o=${s[$n]}%; Ps "CPU usage by process \"${c% ${s[$((n-1))]}*}\" with UID ${s[$((n-1))]}"; }; s=(`top -R -l1 -n1 -o prt -stats command,uid,prt | sed '$!d'`); n=$((${#s[*]}-1)); s[$n]=${s[$n]%[+-]}; c="${s[*]}"; o=$((s[$n]>=25000?s[$n]:0)); Ps "Mach ports used by process \"${c% ${s[$((n-1))]}*}\" with UID ${s[$((n-1))]}"; o=`kextstat -kl | grep -v com\\.apple | cut -c53- | cut -d\< -f1`; Pm "Loaded extrinsic kernel extensions"; R && o=`sudo launchctl list | awk 'NR>1 && !/0x|com\.(apple|openssh|vix\.cron)|org\.(amav|apac|calendarse|cups|dove|isc|ntp|post[fg]|x)/{print $3}'`; Pm "Extrinsic daemons"; o=`launchctl list | awk 'NR>1 && !/0x|com\.apple|org\.(x|openbsd)|\.[0-9]+$/{print $3}'`; Pm "Extrinsic agents"; o=`for d in {/,}L*/Lau*; do M; done | grep -v com\.apple\.CSConfig | while read f; do ID=$($PB\ :Label "$f") || ID="No job label"; printf "$Fb" "$f" "$ID"; done`; Pm "launchd items"; o=`for d in /{S*/,}L*/Star*; do M; done`; Pm "Startup items"; o=`find -L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Compon,Ex,In,iTu,Keyb,Mail/B,P*P,Qu*T,Scripti,Sec,Servi,Spo}* -type d -name Contents -prune | while read d; do ID=$($PB\ :CFBundleIdentifier "$d/Info.plist") || ID="No bundle ID"; [[ "$ID" =~ ^com\.apple\.[^x]|Accusys|ArcMSR|ATTO|HDPro|HighPoint|driver\.stex|hp-fax|\.hpio|JMicron|microsoft\.MDI|print|SoftRAID ]] || printf "$Fb" "${d%/Contents}" "$ID"; done`; Pm "Extrinsic loadable bundles"; o=`find -L /u*/{,*/}lib -type f | while read f; do file -b "$f" | grep -qw shared && ! codesign -v "$f" && echo $f; done`; Pm "Unsigned shared libraries"; o=`for e in INSERT_LIBRARIES LIBRARY_PATH; do launchctl getenv DYLD_$e; done`; Pm "Environment"; o=`find -L {,/u*/lo*}/e*/periodic -type f -mtime -10d`; Pm "Modified periodic scripts"; o=`scutil --proxy | grep Prox`; Pm "Proxies"; o=`scutil --dns | awk '/r\[0\] /{if ($NF !~ /^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./) print $NF; exit}'`; Ps "DNS"; R && o=`sudo profiles -P | grep : | wc -l`; Ps "Profiles"; f=auto_master; [[ `md5 -q /etc/$f` =~ ^b166 ]] || Pc $f /etc/$f; for f in fstab sysctl.conf crontab launchd.conf; do Pc $f /etc/$f; done; Pc "hosts" <(grep -v 'host *$' /etc/hosts); Pc "User launchd" ~/.launchd*; R && Pc "Root crontab" <(sudo crontab -l); Pc "User crontab" <(crontab -l | sed -E 's:/Users/[^/]+/:/Users/USER/:g'); R && o=`sudo defaults read com.apple.loginwindow LoginHook`; Pm "Login hook"; Pp "Global login items" /L*/P*/loginw* Path; Pp "User login items" L*/P*/*loginit* Name; Pp "Safari extensions" L*/Saf*/*/E*.plist Bundle | sed -E 's/(\..*$|-[1-9])//g'; o=`find ~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $ | wc -l`; Ps "Restricted user files"; cd; o=`SP Fonts | egrep "Valid: N|Duplicate: Y" | wc -l`; Ps "Font problems"; o=`find L*/{Con,Pref}* -type f ! -size 0 -name *.plist | while read f; do plutil -s "$f" >&- || echo $f; done`; Pm "Bad plists"; d=(Desktop L*/Keyc*); n=(20 7); for i in 0 1; do o=`find "${d[$i]}" -type f -maxdepth 1 | wc -l`; o=$((o<=n[$i]?0:o)); Ps "${d[$i]##*/} file count"; done; o=; [[ UID -eq 0 ]] && o=root; Ps "UID"; o=$((`date +%s`-t)); Ps "Elapsed time (s)"; } 2>/dev/null | pbcopy; exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
7. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Click anywhere in the Terminal window and paste (command-V). The text you pasted should vanish immediately. If it doesn't, press the return key.
8. If you see an error message in the Terminal window such as "syntax error," enter
exec bash
and press return. Then paste the script again.
9. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, just press return three times at the password prompt.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
10. The test will take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line "[Process completed]" to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report the results. No harm will be done.
11. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
12. When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Terms of Use of Apple Support Communities ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

My iPad 2 keeps losing its wi-fi signal

My iPad 2 keeps on losing its wi-fi signal

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
 Cheers, Tom

QOS - VOIP traffic: payload and signalling

Two questions For VOIP traffic,
Q.1. should the payload and signalling be assigned the same COS ?? to avoid losing Signalling traffic.
Q.2. flash upgrades to the phone sets are tftp. Should this traffic be assigned COS=0 or the same cos as the signalling traffic ? Phone flash gets corrupted if some of these packets are lost ?
thanks for your help,

Hello,
best practice puts signaling into another class than voip "payload" as you named it.
The reason is that the qos requirements are different. Signaling needs guaranteed bandwidth, voip needs low delay and guaranteed bandwidth.
TFTP can be placed into signaling class or in a separate class.
An example config could look like this:
ip cef
class-map match-any VoIP
match ip dscp ef cs5
match protocol rtp audio
class-map match-any VoIPsignal
match ip dscp cs3
class-map match-all TFTP
match protocol tftp
policy-map VoIPprio
class VoIP
priority percent 10
class VoIPsignal
bandwidth remaining percent 5
class TFTP
bandwidth remaining percent 5
class class-default
fair-queue
random-detect
interface Serial0
ip address ...
service-policy output VoIPprio
You would have to adjust the bandwith ratios for your needs and the interface naming to your environment.
The policy will give 10% of the link to voip traffic with lowest possible delay, 5% of the rest for voip signaling, 5% to TFTP and the rest for the other data present.
Hope this helps

Encoder speed and orientation on NI 9401 in cDAQ-9172

Hello, I've acquired a ni 9401 module for my cDAQ-9172 and it's now installed in slot five to connect a dual channel encoder. Channel A is connected to pin 14 and channel B to pin 17 and the encoder is powered by 5v dc.
I want to mesure the speed and if possible the orientation of rotation.
To do this I started with the VI in attach, that can count the total of pulses in the encoder.
My question is, how can I change the DAQmx Create Channel to Frequency, and the DAQmx Read to Counter Pulse Freq 1 Chan 1 Samp, to calculate the actual encoder speed and orientation?
Solved!
Go to Solution.
Attachments:
encoder.vi ‏63 KB

Hi Eric.
Once again, thank you very much for the help.
I think I finally did it. The Vi is reading the speed witch I think is right, but there's some oscilation.
I've connected only the signal A from encoder to pin 14 on the NI-9401, and the pin 1 to ground. The signal B is not connected right now because I only have one NI-9401 on a cDAQ-9172, so only one counter.
The VI you just send me, is calculating the speed (frequency), witch I divid by 200 because those are the pulses per revolution of the encoder, but I can see a little of oscillation on the speed measured (see picture in attachment).
For now, my question is if is possible to improve the measurement, and how?
Thank you.
André Quintino.
P.S. - Note that in the picture in attachment, the speed is the one measured by the VI you just send me. The encoder was running at 1524RPM witch are 25,4Hz. Since the speed in the graph is multiplied by 200 (the pulses per revolution of the encoder), this result in a measurement of 5080 witch is the average number by the graph.
Attachments:
Screen shot 2011-01-12 at 00.41.13.png ‏16 KB

HT1515 Can I use Air Port express as a signal extender for SKY Broadband router in UK?

Can I use Air Port express as a signal extender for SKY Broadband router in UK?

You are going to have to turn OFF Wifi on the Sky router device so its just a modem.
String an Ethernet cable off of the Sky router to an Apple Airport/Time Capsule device and have that create a stable WiFi network.
Using WDS protocols you can now add additional Apple Airport expresses as needs be to extend the Wifi signal area.
In theory you should able to extend an existing network however inter-operability between differing manufacturers is flaky at best.
Caveat using extenders Will degrade the performance of your network.
So its going to be more expensive - Need Two Airport devices and you my need support in creating the network (you may have to log in to the Sky provided routers advanced settings in the Java Control Panel and from a web browser to turn off features such as Wifi and IP addressing)
You may be better contacting Sky as they may actually have a compatible network extender (BT certainly do for their Home Broadband routers) available.

AirPort Express has weak signal while playing music from Iphone, intermittent play

AirPort Express has weak signal while playing music from Iphone, intermittent play

I'm having the same problem, even more:
- Watching movies over AppleTV: switches off every 20min (sleep mode).
- Listening to iTunes music ofer AirPlay: the same.
- A whole confusion with switching airplay destinations (AppleTV, AirportExpress) over iPhone remote app. Sometimes remote cannot find my library anymore
- Before, I was able to multitask: stream a DVD to AppleTV, using airplay mirroring, and simultaneously stream music from iTunes on the same computer, over the iTunes airplay selector, to loudspeakers connected to AirportExpress. No longer possible.
I've grown a big Apple fan in short time, proudly living what for others is the future (your media stored anyhwere, controlled from anywhere, played anywhere, stop thinking in terms of devices). And, I've learnt to savour the moments when you can look your Microsoft friends deep in the eyes and say: "The big difference with Apple - it just works"...
At the moment, I'm trying not to invite my friends.

Mapping the High Speed Capture signal to RTSI

Hello,
Can i Mapp the "High Speed Capture" signal to RTSI ?
When i'm using the motion RTSI example and mae some changes:
i'm setting the source to "High speed capture" and the destination to RTSI_0 i 'm getting an error that its possible!
i want to use this input to trigger an action on other pci.
I'm using pci-7344 with umi - 7774 and pcie-1430
Thanks
Mor
Message Edited by MotiM on 08-01-2009 08:47 AM

Dear Jochen,
Thank you for your reply.
I try to map the High Speed capture to RTSI , but the HSC doesnt work.
When i remove the RTSI mapping from my diagram, the HSC work and i can capture the encoder position.
I'm using the UM7774, and the HSC is wired to the global connectors (TRIGGER/BREAKPOINT connector)
I also read all the relevant documentation about my hardware and i notice that there is a comment about mapping the motion rtsi :
(from Select Signal vi Help): Note You must route signals from the RTSI lines before you enable high-speed capture ,
so i also consider that, it still doesnt work....
I really appreciate if you can take a look about the 2 versions of vi i attached here.
They both need to do the same.
Each vi contains 2 parallel diagrams, one diagram for the single axis move, the move is to target position X,
the second diagram is for the vision, there is "trigger each line" from rtsi line (the motion diagram includes maping the encoder phase A to the rtsi for this purpose)
and i want to use the High speed capture to trigger the start of imaq also.
The example :
HSC in motion activate the start of imaq in second loop.vi
is a working example that runs good and capture the image.
but its "dirty" programming, i dont think its should work like this.
its actualy a implementation of "busy wait" loop.... ( i dont like it, but work...)
The example :
HSC triger directly the start of imaq.vi
is hoe i think its should be ( i know that i need to trigger the HSC whitin the time of the timeout of waiting to the start trigger of imaq to accure, that is why i put a big number there... )
BUT, this vi doesnt work, the High speed capture doesnt happend at all...
Can you take a look on these vi and let me know what i'm doing wrong here.
I really appriciate your help.
Regards
Mor
Message Edited by M0Reng on 08-03-2009 02:14 PM
Attachments:
HSC in motion activate the start of imaq in second loop.vi ‏72 KB
HSC triger directly the start of imaq.vi ‏71 KB

Losing Express Speed and Signal

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