Re: [time-nuts] Possibly off topic - Jitter on Ethernet over poweradapters
Ahem! Ethernet over powerline! NOT PoE! The various forms of ether over power are (for practical purposes) a wireless ethernet protocol coupled into the AC wiring. And yes, it is noisy timing wise, for all the same reason that a simplex/shared variable rate 802.11 system is. On 2/10/13 9:15 PM, David J Taylor wrote: It is unlikely to add much noise. The PoE device only puts a DC bias on the twisted pair. The data signal is differential. It is transformer couple to is pretty much is immune to common mode noise. So even iif the DC bias was noisy I don't thing it would matter. Chris Albertson Redondo Beach, California Chris, This isn't PoE we're discussing. It's data over mains wiring. 110 V AC to you, 240 V AC to me. Homeplug. http://www.dabs.com/products/zyxel-pla4201-500mbps-mini-powerline-ethernet-adaptor-twin-pack-83VC.html?q=ethernet%20power%20linesrc=16 Cheers, David ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Possibly off topic - Jitter on Ethernet over
On 2/11/2013 10:35 AM, time-nuts-requ...@febo.com wrote: It is unlikely to add much noise. The PoE device only puts a DC bias on the twisted pair. The data signal is differential. It is transformer couple to is pretty much is immune to common mode noise. So even iif the DC bias was noisy I don't thing it would matter. -- Chris, Not to be rude, but talking about Ethernet over power NOT power over Ethernet. Networking on top of the 120VAC power wires, is the question here Dan ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Possibly off topic - Jitter on Ethernet overpower adapters
All, Strangely today the jitter numbers seem to be behaving themselves! Nothing has been done to the set up. Thanks to everyone for their comments. I'm looking at putting a direct Ethernet cable in here to see what the difference might make. Attached is a picture of latest NTP Monitor readout. Bottom two devices are the Meinberg LanTimes. The others are pool servers. Rob === Rob, Two comments from your screen-shot. - NTP version 4.2.4p8 is now rather old. You may well find better performance using a more recent version, and especially with the most recent development versions on Windows-7 and Windows-Vista. There are some upgrade notes on my Web site. http://www.satsignal.eu/ntp/setup.html#updating - with a local stratum-1 server, you can get better performance using a more frequent poll i.e. limit maxpoll. For my PCs I typically have (with NTP 4.2.6 or later): _ # Local stratum-1 LAN-based servers server192.168.0.3 iburstminpoll 5 maxpoll 5prefer# Pixie server192.168.0.2 iburstminpoll 5 maxpoll 5# Feenix # External servers from the UK pool pooluk.pool.ntp.orgminpoll 10 _ For measurement, you may want to let the poll interval drift to 1024s, but for lower offsets keeping poll to 32s (maxpoll 5) gives better results. My apologies if you were already aware of this. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Possibly off topic - Jitter on Ethernet overpower adapters
-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David J Taylor Sent: 11 February 2013 16:13 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Possibly off topic - Jitter on Ethernet overpower adapters All, Strangely today the jitter numbers seem to be behaving themselves! Nothing has been done to the set up. Thanks to everyone for their comments. I'm looking at putting a direct Ethernet cable in here to see what the difference might make. Attached is a picture of latest NTP Monitor readout. Bottom two devices are the Meinberg LanTimes. The others are pool servers. Rob === Rob, Two comments from your screen-shot. - NTP version 4.2.4p8 is now rather old. You may well find better performance using a more recent version, and especially with the most recent development versions on Windows-7 and Windows-Vista. There are some upgrade notes on my Web site. http://www.satsignal.eu/ntp/setup.html#updating - with a local stratum-1 server, you can get better performance using a more frequent poll i.e. limit maxpoll. For my PCs I typically have (with NTP 4.2.6 or later): _ # Local stratum-1 LAN-based servers server192.168.0.3 iburstminpoll 5 maxpoll 5prefer# Pixie server192.168.0.2 iburstminpoll 5 maxpoll 5# Feenix # External servers from the UK pool pooluk.pool.ntp.orgminpoll 10 _ For measurement, you may want to let the poll interval drift to 1024s, but for lower offsets keeping poll to 32s (maxpoll 5) gives better results. My apologies if you were already aware of this. Cheers, David - David, Many thanks for that. I do have a copy of 6.2.6 which I have tried, but the jitter numbers appeared higher. I will try again and also change the minpoll settings as suggested. The settings shown were the default settings from Meinberg and I haven't tweaked them. Will see what I get. Rob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Possibly off topic - Jitter on Ethernet over, power adapters
I use a number of power line switches in my home environment. Primarily Insteon devices which are similar, but much improved version of the X-10 products. For powerline communications, the data bursts are timed with the zero-crossing point of the power line signal. This implies that some sort of buffering is required to make sure the data is transferred during this interval. If your Ethernet device uses same technique, would there not be jitter imposed by the relationship of your expected data and the required synchronization of the power line signal? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] FRK-L Rubidium
Ed, Bob, This morning I noticed the crystal control voltage was down to 11 volts. I'll let it keep running to see if it drops any further. The tuning capacitor is adjusted out about as far as I want to set it. Any further and I think the adjustment screw will fall out. I did remove C11 as an experiment to see what it would do to the frequency. It dropped a lot so now I know I can put a smaller one in if I need more adjustment. Next up is the Tbolt. I'm pretty sure the oven heater is not working. Has anyone taken apart the trimble oscillator? It looks like it's sealed pretty good. I see quite a few for sale. Is it just easier to replace it? Thanks for all the help. Garren -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ed Palmer Sent: Sunday, February 10, 2013 11:02 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FRK-L Rubidium Hi Garren, Yes, you're right. Silly me, I made the mistake of believing what was written in the manual which says 2-12 volts. When I measure it, I see ~2-16 volts. Let that be a warning to you. This isn't the first time that manual has led me astray! I should have known better. Did you notice that the voltage changes as you adjust the capacitor on the side? If the adjustment is at it's limit, you may have to change capacitors A3C11 and maybe A3C12 to get the oscillator back on frequency. It's explained in the manual. :-) Let it settle for at least a few days and see which direction the crystal control voltage moves. If it falls you're fine. If it rises higher, you may want to look at the capacitors. If you have to change the capacitors, be sure to use NP0/C0G type capacitors. Bob's comments regarding the C-field are right on the money. It's for fine tuning after you have a stable lock. It won't help you obtain or maintain a lock. You won't be able to adjust it without a known, stable 10 MHz reference source like the Tbolt and some good measurement equipment. Ed On 2/10/2013 9:27 AM, Garren Davis wrote: Hi Ed, The voltage swings from 2v to 17v. Doesn't that mean I have about 4 to 5 volt margin if it's locked at 12 volts? I had to adjust the capacitor out almost all the way to get it to lock. If I need to adjust it more can I use the C-field adjustment or should I stay away from that? Garren On Feb 9, 2013, at 10:48 PM, Ed Palmer ed_pal...@sasktel.net wrote: Hi Garren, Congrats on your repair. Since the crystal control voltage is spec'd as ~1 to 12 Vdc, you're apparently holding onto lock by the narrowest of margins. You definitely want to adjust the oscillator to bring that voltage closer to the middle of it's range. Ed On 2/9/2013 11:38 AM, Garren Davis wrote: Found my problem with the FRK. R31 on the Osc board was burned and open. This was caused by a shorted C16. Replaced and it is now locked. The lock voltage is 12.7v. Is this good or should it be lower? Garren On Feb 9, 2013, at 6:10 AM, Bob Camp li...@rtty.us wrote: Hi How old is the FRK? Does it look like it's been run without a heat sink for very long? They tend to get flaky if run for a while (many months) without heat sinking. There's nothing mysterious about it. The MTBF of the parts gets noticeably worse as the unit heats up. Bob On Feb 9, 2013, at 1:09 AM, Garren Davis garren.da...@qlogic.com wrote: Well for some reason the 10 Mhz stopped working on the FRK. Don't know why. Started up the thunderbolt. It acquired satellites but then the DAC voltage went to -5 volts. It's been there for an hour. Will this change after the unit stabilizes? Going to bed. Will check it tomorrow. Garren On Feb 8, 2013, at 8:25 PM, Ed Palmer ed_pal...@sasktel.net wrote: Hi Garren, I suggest that you get the Thunderbolt working first. Without a known 10 MHz source to compare to, you're flying blind. Once the Tbolt is running, you should be able to check the frequency of the FRK by feeding both into your scope. Trigger on the Tbolt and watch what the FRK does. You should see the trace scrolling in one direction, then slow down, then stop, then scroll the other direction. The 'stop' point is at 10 MHz. The frequency sweeps a total of 20-30 Hz so it's easy to see. If you don't see the 'stop' point, the FRK isn't getting to 10 MHz. Now use the best frequency counter you've got to measure the Tbolt. Regardless of the calibration of your counter, the number your counter gives you becomes your 'new' 10 MHz. Now measure the FRK to see if it's running fast or slow. You should check the temperature of the lamp. It's easy to get at by removing the cover in the center of the heat sink. Probably best to remove the cover and then power down before you go poking around inside! The temperature of the cavity is also important, but getting to it is more of a hassle - don't go there if you don't have to. Of
Re: [time-nuts] FRK-L Rubidium
It is possible to open the can if you are careful. A good vacuum desoldering tool is a good start to remove as much of the solder as possible. Then one would peal the can open a bit at a time. Then you need to find out where the failure is. But to answer your question, yes just buy one, it's much easier. But first check that there is power to the heater. - Original Message - From: Garren Davis garren.da...@qlogic.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, February 11, 2013 12:01 PM Subject: Re: [time-nuts] FRK-L Rubidium Ed, Bob, This morning I noticed the crystal control voltage was down to 11 volts. I'll let it keep running to see if it drops any further. The tuning capacitor is adjusted out about as far as I want to set it. Any further and I think the adjustment screw will fall out. I did remove C11 as an experiment to see what it would do to the frequency. It dropped a lot so now I know I can put a smaller one in if I need more adjustment. Next up is the Tbolt. I'm pretty sure the oven heater is not working. Has anyone taken apart the trimble oscillator? It looks like it's sealed pretty good. I see quite a few for sale. Is it just easier to replace it? Thanks for all the help. Garren -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ed Palmer Sent: Sunday, February 10, 2013 11:02 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FRK-L Rubidium Hi Garren, Yes, you're right. Silly me, I made the mistake of believing what was written in the manual which says 2-12 volts. When I measure it, I see ~2-16 volts. Let that be a warning to you. This isn't the first time that manual has led me astray! I should have known better. Did you notice that the voltage changes as you adjust the capacitor on the side? If the adjustment is at it's limit, you may have to change capacitors A3C11 and maybe A3C12 to get the oscillator back on frequency. It's explained in the manual. :-) Let it settle for at least a few days and see which direction the crystal control voltage moves. If it falls you're fine. If it rises higher, you may want to look at the capacitors. If you have to change the capacitors, be sure to use NP0/C0G type capacitors. Bob's comments regarding the C-field are right on the money. It's for fine tuning after you have a stable lock. It won't help you obtain or maintain a lock. You won't be able to adjust it without a known, stable 10 MHz reference source like the Tbolt and some good measurement equipment. Ed On 2/10/2013 9:27 AM, Garren Davis wrote: Hi Ed, The voltage swings from 2v to 17v. Doesn't that mean I have about 4 to 5 volt margin if it's locked at 12 volts? I had to adjust the capacitor out almost all the way to get it to lock. If I need to adjust it more can I use the C-field adjustment or should I stay away from that? Garren On Feb 9, 2013, at 10:48 PM, Ed Palmer ed_pal...@sasktel.net wrote: Hi Garren, Congrats on your repair. Since the crystal control voltage is spec'd as ~1 to 12 Vdc, you're apparently holding onto lock by the narrowest of margins. You definitely want to adjust the oscillator to bring that voltage closer to the middle of it's range. Ed On 2/9/2013 11:38 AM, Garren Davis wrote: Found my problem with the FRK. R31 on the Osc board was burned and open. This was caused by a shorted C16. Replaced and it is now locked. The lock voltage is 12.7v. Is this good or should it be lower? Garren On Feb 9, 2013, at 6:10 AM, Bob Camp li...@rtty.us wrote: Hi How old is the FRK? Does it look like it's been run without a heat sink for very long? They tend to get flaky if run for a while (many months) without heat sinking. There's nothing mysterious about it. The MTBF of the parts gets noticeably worse as the unit heats up. Bob On Feb 9, 2013, at 1:09 AM, Garren Davis garren.da...@qlogic.com wrote: Well for some reason the 10 Mhz stopped working on the FRK. Don't know why. Started up the thunderbolt. It acquired satellites but then the DAC voltage went to -5 volts. It's been there for an hour. Will this change after the unit stabilizes? Going to bed. Will check it tomorrow. Garren On Feb 8, 2013, at 8:25 PM, Ed Palmer ed_pal...@sasktel.net wrote: Hi Garren, I suggest that you get the Thunderbolt working first. Without a known 10 MHz source to compare to, you're flying blind. Once the Tbolt is running, you should be able to check the frequency of the FRK by feeding both into your scope. Trigger on the Tbolt and watch what the FRK does. You should see the trace scrolling in one direction, then slow down, then stop, then scroll the other direction. The 'stop' point is at 10 MHz. The frequency sweeps a total of 20-30 Hz so it's easy to see. If you don't see the 'stop' point, the FRK isn't getting to 10 MHz. Now use the best
[time-nuts] lightweight webserver for, e.g., NTP widget
I'm intrigued by the possibility of using a lightweight web server to provide a management/user interface to test equipment or appliances (e.g. like the NTP server recently discussed, or a box with mixers and counters). I've built some web interfaces to very small things using Arduinos and Rabbits, and it works ok for simple stuff (turning on and off switches), but as soon as you start looking at a bit more complexity (e.g. you want to move files around), a bit more sophistication on your server seems useful. Or, for instance, if you have a DDS you want to program to follow a particular sequence of frequencies (e.g. to match a particular Doppler profile, in my case). Or a data acquisition application. The appeal that the user client is that any old web-browser is pretty generic. I've done this sort of by exposing a directory as a public share (SMB) and then browsing to that file, using the file:// mechanism, but it seems that actually having a real server might be useful (for things like POST from a form, for instance) But, on the other hand, it seems that something like Apache is a bit much to manage. Is there something that runs under Linux on a lightweight single board PC (Raspberry pi or Intel Mini-ITX Atom mobos) that isn't too much of a pain, and doesn't require you to be a full time web server administrator to make it work? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] lightweight webserver for, e.g., NTP widget
There are numberous web servers that are small and light weight, some examples are boa ( www.boa.org ) and HTTPd http://www.nongnu.org/mini-httpd/ On Mon, 2013-02-11 at 14:01 -0800, Jim Lux wrote: I'm intrigued by the possibility of using a lightweight web server to provide a management/user interface to test equipment or appliances (e.g. like the NTP server recently discussed, or a box with mixers and counters). I've built some web interfaces to very small things using Arduinos and Rabbits, and it works ok for simple stuff (turning on and off switches), but as soon as you start looking at a bit more complexity (e.g. you want to move files around), a bit more sophistication on your server seems useful. Or, for instance, if you have a DDS you want to program to follow a particular sequence of frequencies (e.g. to match a particular Doppler profile, in my case). Or a data acquisition application. The appeal that the user client is that any old web-browser is pretty generic. I've done this sort of by exposing a directory as a public share (SMB) and then browsing to that file, using the file:// mechanism, but it seems that actually having a real server might be useful (for things like POST from a form, for instance) But, on the other hand, it seems that something like Apache is a bit much to manage. Is there something that runs under Linux on a lightweight single board PC (Raspberry pi or Intel Mini-ITX Atom mobos) that isn't too much of a pain, and doesn't require you to be a full time web server administrator to make it work? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] lightweight webserver for, e.g., NTP widget
If you just want to static-serve the assets in a particular folder, and have python available, there's always: python -m SimpleHTTPServer …which serves the current directory on localhost:8080. But no PHP. For a modern approach you might look at building a small server based on Node.js, which is a sort of construction kit for network applications like web servers, among other things. It runs on small linux platforms like the Raspberry Pi, as well as the usual desktop systems. Open source at http://nodejs.org As an example, I publish an open-source Node.js application for controlling the Arduino here: https://github.com/billroy/bitlash-commander It's a web server that talks to devices on the serial port and serves control panels with status indicators and controls over the web. Your DDS control example would be easy to implement in a similar way using node. Happy to follow up off-list. -br On Feb 11, 2013, at 3:01 PM, Jim Lux wrote: I'm intrigued by the possibility of using a lightweight web server to provide a management/user interface to test equipment or appliances (e.g. like the NTP server recently discussed, or a box with mixers and counters). I've built some web interfaces to very small things using Arduinos and Rabbits, and it works ok for simple stuff (turning on and off switches), but as soon as you start looking at a bit more complexity (e.g. you want to move files around), a bit more sophistication on your server seems useful. Or, for instance, if you have a DDS you want to program to follow a particular sequence of frequencies (e.g. to match a particular Doppler profile, in my case). Or a data acquisition application. The appeal that the user client is that any old web-browser is pretty generic. I've done this sort of by exposing a directory as a public share (SMB) and then browsing to that file, using the file:// mechanism, but it seems that actually having a real server might be useful (for things like POST from a form, for instance) But, on the other hand, it seems that something like Apache is a bit much to manage. Is there something that runs under Linux on a lightweight single board PC (Raspberry pi or Intel Mini-ITX Atom mobos) that isn't too much of a pain, and doesn't require you to be a full time web server administrator to make it work? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] lightweight webserver for, e.g., NTP widget
I used thttpd many years ago. It is tiny and fast. There are others. Joe Gray W5JG On Feb 11, 2013 3:01 PM, Jim Lux jim...@earthlink.net wrote: I'm intrigued by the possibility of using a lightweight web server to provide a management/user interface to test equipment or appliances (e.g. like the NTP server recently discussed, or a box with mixers and counters). I've built some web interfaces to very small things using Arduinos and Rabbits, and it works ok for simple stuff (turning on and off switches), but as soon as you start looking at a bit more complexity (e.g. you want to move files around), a bit more sophistication on your server seems useful. Or, for instance, if you have a DDS you want to program to follow a particular sequence of frequencies (e.g. to match a particular Doppler profile, in my case). Or a data acquisition application. The appeal that the user client is that any old web-browser is pretty generic. I've done this sort of by exposing a directory as a public share (SMB) and then browsing to that file, using the file:// mechanism, but it seems that actually having a real server might be useful (for things like POST from a form, for instance) But, on the other hand, it seems that something like Apache is a bit much to manage. Is there something that runs under Linux on a lightweight single board PC (Raspberry pi or Intel Mini-ITX Atom mobos) that isn't too much of a pain, and doesn't require you to be a full time web server administrator to make it work? __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] altinex switches
I bought a couple of 180986059633 switches. The manual is at: http://pdf.textfiles.com/manuals/STARINMANUALS/Altinex/Manual/Archive/Home%20Run%20(HR)%20Series.pdf You get 8 inputs switchable to 12 outputs IN ANY COMBO. meaning it can be a 12 output distribution amp. isolation amps all round, and either 200 or 300 MHz bandwidth. dc coupled, have a look. There are some left. Don -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] altinex switches
Looks like 75 ohms if I understand the manual correctly. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Don Latham Sent: Monday, February 11, 2013 8:00 PM To: time nuts Subject: [time-nuts] altinex switches I bought a couple of 180986059633 switches. The manual is at: http://pdf.textfiles.com/manuals/STARINMANUALS/Altinex/Manual/Archive/Home%2 0Run%20(HR)%20Series.pdf You get 8 inputs switchable to 12 outputs IN ANY COMBO. meaning it can be a 12 output distribution amp. isolation amps all round, and either 200 or 300 MHz bandwidth. dc coupled, have a look. There are some left. Don -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] altinex switches
I just bought the last one at 11:30PM. -Arthur ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] lightweight webserver for, e.g., NTP widget
From: Jim Lux [] Is there something that runs under Linux on a lightweight single board PC (Raspberry pi or Intel Mini-ITX Atom mobos) that isn't too much of a pain, and doesn't require you to be a full time web server administrator to make it work? Anything which works on the Raspberry Pi must be fairly lightweight! G I don't think that basic Apache would be too much to manage, and many folk have used it: http://lifehacker.com/5963554/set-up-a-raspberry-pi-as-a-personal-web-server http://www.jeremymorgan.com/tutorials/raspberry-pi/how-to-raspberry-pi-web-server/ http://www.wikihow.com/Make-a-Raspberry-Pi-Web-Server Should be fine especially now that 512 MB memory is the standard. PHP seems to the installed with most of these servers, and perhaps that would provide the flexibilty you need. David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] lightweight webserver for, e.g., NTP widget
On Mon, Feb 11, 2013 at 10:04 PM, David J Taylor david-tay...@blueyonder.co.uk wrote: Anything which works on the Raspberry Pi must be fairly lightweight! G I don't think that basic Apache would be too much to manage, and many folk have used it: I have to agree with the above. Many people think Apache is a heavy weight process the requires server class hardware. This is absolutely NOT the case. Appache scales itself by using the process per client server model. This means as the load on the system goes up Apache makes copies of itself that all run in parallel. Yu is CAN make use of huge multi-core servers with gigabytes of RAM but it also scales down to small scale and is not a CPU hog and nearly disappears when it is idle. And as said, it is easy to configure because everyone who knows anything about the web knows Apache so help is easy to find -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
