Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread David C. Partridge
Hi Mark, After all the effort you just put in, you'll be a touch annoyed that Jamma Boards have done a kit for TM500 extenders for ages ... OTOH you may know about them and have decided you could do better. http://www.jammaboards.com/store/tektronix-tm500-series-extender-kit-tm500- kit.html

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread BIll Ezell
LTE does support the long-standard NITZ (network information and time zone) service. It's an easy way to find out just where you are without having to change your TZ settings constantly. In fact, if you go to time settings on HTC Android phones, the 'automatic time update(NITZ)' setting turns

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread jmfranke
I believe I would be interested in two. John WA4WDL Mark Sims hol...@hotmail.com wrote: I just finished laying out a small circuit board for building an extender cable for the Tek TM500 series mainfames / modules. Prototypes are off being fab'd at OSHPARK. Should be here in a couple

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Bill Dailey
For informational purposes I will show what I use to compare with my stock Iphone. It is an app called emerald time. Screenshot at: https://www.dropbox.com/s/zt6tjrsylrrtrc3/2014-08-04%2008.06.02.png You can set it up to sync with you own ntp server. I think. You can just spot check it.

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread James Tucker
Mark; Could you describe your design a bit more? E.g., 1) There are connectors at both ends of those cables; what are your socket provisions for the module end? 2) Do you use 0.1 40-pin headers at both ends, or some other form of termination? BTW, I'd be interested in some, as well, depending on

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread Dave Daniel
Several people on the TekScopes/Tekscopes2 forums went through this a while back. It turned out that ribbon cable appropriate for this application was either not available or too expensive. John Griessen made a set of PWBs and sold kits consisting of a PWB pair, a connector pair and a set of

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Chris Albertson
On Mon, Aug 4, 2014 at 5:38 AM, BIll Ezell w...@quackers.net wrote: Clearly, just using something like NTP directly isn't all that useful because you have to know your physical location to know what timezone correction to appl I'm pretty sure you have to set the time zone that is displayed.

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Chris Albertson
On Mon, Aug 4, 2014 at 6:09 AM, Bill Dailey docdai...@gmail.com wrote: I have never done a rigorous analysis but it appears to be within 1.5s or better most of the time. That is what to expect. as of IOS 5 they use NTP but they look at the clock drift and use NTP at a polling interval just

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Glen Hoag
As someone who crosses time zone boundaries with relative frequency, I can tell you that the iPhone does indeed set it's time zone automatically, based on information the phone gets from the cellular network. Sent from my iPhone On Aug 4, 2014, at 11:49, Chris Albertson

[time-nuts] Tektronix TM500 extender cable ki

2014-08-04 Thread Mark Sims
I have seen the Jamma kit (I will be using their edge connectors) and John's design. Their main problem is the hassle of wiring up 56 individual wires. Also that tends to be not all that reliable... wires tend to break at the solder joints. The board that I laid out has two 40 pin ribbon

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread Hal Murray
It turned out that ribbon cable appropriate for this application was either not available or too expensive. Are standard disk cables a reasonable length? (and a pinout you can use) I don't know the details, but there are two types of disk cables. The old style uses standard 40 pin ribbon

Re: [time-nuts] Tektronix TM500 extender cable ki

2014-08-04 Thread Tom Miller
Mark, that is a nice idea and much easier to construct. Count me in for two sets. Regards, Tom - Original Message - From: Mark Sims hol...@hotmail.com To: time-nuts@febo.com Sent: Monday, August 04, 2014 2:20 PM Subject: [time-nuts] Tektronix TM500 extender cable ki I have seen the

Re: [time-nuts] Tektronix TM500 extender cable ki

2014-08-04 Thread Robert LaJeunesse
___ 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] How are iPhones' clocks set under LTE?

2014-08-04 Thread Bob Camp
Hi I *think* it’s even more specific than that. I’ve watched it switch time driving down the road in Indiana. As we did zig zags over the time zone line, the iPhone quite happily changed displayed time. My guess was that it used GPS location info to decide which side of the line it was on.

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Chris Albertson
You can select the behavior you prefer... SettingsGeneralDate Time. You can set it manually or have it set automatically based on your current location. Leaving to automatic uses a surprising amount of battery power. On Mon, Aug 4, 2014 at 3:16 PM, Bob Camp kb...@n1k.org wrote: Hi I

Re: [time-nuts] time-nuts Digest, Vol 121, Issue 6

2014-08-04 Thread BIll Ezell
Every cell phone I've ever had figures out the timezone by itself in the US and in every country in Europe and Asia I've been to. It used to be basically automatic (automagic?) with CDMA; the local tz offset from UTC, plus the correction offset for GPS time (which the basestations had

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Shane Morris
Bill, I just got Emerald Time for my iPad - quite a great app, considering I need accurate time for things. Is there a website for the app developer? Many thanks! Shane. On Tue, Aug 5, 2014 at 8:16 AM, Bob Camp kb...@n1k.org wrote: Hi I *think* it’s even more specific than that. I’ve

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Brian Garrett
I've heard that people who live near time zone boundaries (very near, like within a mile or two) often have to switch automatic setting off, because the time might be an hour off depending on which tower their phone connects to. the annual switches to and from daylight saving time can cause

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Brian Garrett
Emerald Time is a very nifty little app, and yes, I've used it a number of times to check my phone's displayed time. It's often off by more than two seconds but never more than three, so far. There are several other apps that can check the time with NTP, and display it in different formats,

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread R.Phillips
Am I right in thinking that two of these connector/cables would give the full facilities on the 5000 series units. Roy -Original Message- From: Dave Daniel Sent: Monday, August 04, 2014 4:02 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts]

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Bill Dailey
you would have to dig around and look. I am sure there is. I have played with it for a year or two. I put my own ntp server in there and was frequently disappinted that it would prefer remote servers quite often.. which cant be better than mine. I dont get that but otherwise I like it. Bill

[time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread Mark Sims
Yes, all 56 pins are extended, including the PWR pin unique to the 5000 series (it is a power good/power-on reset sort of signal).Several of the TM500 modules are also double-wides and need two extender cables. I have not done an extender for the GPIB connector, but that would be easy to

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Paul
On Mon, Aug 4, 2014 at 2:24 PM, Brian Garrett garrettbrian1...@gmail.com wrote: However,they will not alter the phone's internal clock. Yes, Apple does not present an (unpriviledged) iOS API to set the clock. Neither does (current, unpriviledge) Android. That's probably a good thing.

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Paul
On Mon, Aug 4, 2014 at 6:32 PM, Shane Morris edgecombe...@gmail.com wrote: Bill, I just got Emerald Time for my iPad - quite a great app, considering I need accurate time for things. Is there a website for the app developer? http://www.emeraldsequoia.com/ On Mon, Aug 4, 2014 at 8:01 PM, Bill

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread paul swed
You are right thats why I am thinking about 2. On the ribbon cable discussion I do agree ribbon cable can be fragile unless solidly tied down then they are pretty stable. An approach I have used in building extenders for RS sig gens that use Euro boards is the same stranded wire type for all pins.

Re: [time-nuts] Tektronix TM500 extender cable ki

2014-08-04 Thread paul swed
Yes indeed this is very interesting. I have a number of TM500 modules that need TLC every now and then. I may also want two. Regards Paul. WB8TSL On Mon, Aug 4, 2014 at 3:50 PM, Robert LaJeunesse lajeune...@mail.com wrote: ___ time-nuts mailing

Re: [time-nuts] How are iPhones' clocks set under LTE?

2014-08-04 Thread Bill Dailey
ahhh.. I wondered On Mon, Aug 4, 2014 at 7:27 PM, Paul tic-...@bodosom.net wrote: On Mon, Aug 4, 2014 at 6:32 PM, Shane Morris edgecombe...@gmail.com wrote: Bill, I just got Emerald Time for my iPad - quite a great app, considering I need accurate time for things. Is there a website

Re: [time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread Tom Miller
Except for the three wide units such as the CG5011, CG551, etc. Tom - Original Message - From: R.Phillips phill...@btinternet.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, August 04, 2014 12:11 PM Subject: Re: [time-nuts] Tektronix

Re: [time-nuts] Tektronix TM500 extender cable ki

2014-08-04 Thread Alex Pummer
I would like to get a pair too Alex KJ6UHN On 8/4/2014 5:15 PM, paul swed wrote: Yes indeed this is very interesting. I have a number of TM500 modules that need TLC every now and then. I may also want two. Regards Paul. WB8TSL On Mon, Aug 4, 2014 at 3:50 PM, Robert LaJeunesse

[time-nuts] Tektronix TM500 extender cable kit

2014-08-04 Thread Mark Sims
Well, just for grins, I did a small board for extending the TM5000 GPIB connector. I remember that the last time I extended the GPIB bus by hooking a ribbon cable to the TM5000 mainframe motherboard it was a bit of a hassle to get to. These should make life easier...