[time-nuts] NMEA Checksums

I'm re-sending this since it hasn't echoed back to me - just gone into a void... >> Hi Folks When calculating the checksum for an NMEA message, are the commas taken into account or ignored? Just trying to work out whether I can get away with a minor modification to the Oncore checksum (bu

[time-nuts] NMEA Checksums

Hi Folks When calculating the checksum for an NMEA message, are the commas taken into account or ignored? Just trying to work out whether I can get away with a minor modification to the Oncore checksum (but ignoring the $ and the *) or whether I need to sort out the relevant bits into a new bu

Re: [time-nuts] NMEA Checksums

> When calculating the checksum for an NMEA message, are the commas > taken into account or ignored? I'd expect that to be covered in the documentation that describes the details on the NMEA sentences the device supports. I've got a couple Garmin pdfs. Both have the same paragraph with all th

[time-nuts] Perhaps We're All Swiss at Heart?

<> Switzerland's obsession with time Switzerland is famous for its watches and its trains that run on time. But, asks Imogen Foulkes, can punctuality become too much of a good thing? In the centre of Bern there is an electronic clock which is ticking off the days, hours, minutes and secon

[time-nuts] Z3801A GPS Receiver Data Wanted

Where can I download info on the Motorola Oncore VP OS Receiver used inh the Z3801A ? I was thinking about trying to get the NMEA data out and use VisualGPS. Also, what Dumb Terminal Emulator program people use ? I have an old Compaq Pentium with WIN98SE that I use for Radio Programming as well.

Re: [time-nuts] Thoughts on IR thermometers?

> I found a cheap IR sensor (not a spot meter) useful to identify the > one IC that's warmer than the others in a fully populated PWB. I usually use my fingers for that sort of test. :) Warning. Don't try it on really hot chips! I have a small lump on my thumb leftover from touching a chip t

Re: [time-nuts] Thoughts on IR thermometers?

A point of clarification on Infrared. Thermal infrared is used to measure temperatures. Wavelength about 10 micometres. Lenses made of strange materials like germanium or some polymers. Sensors are also strange materials, lead teluride? Most cameras used scanning optics, often mirrors. Radiatio

[time-nuts] The HP 10811-60111

Good members I have a 10811-60111 Crystal Osc. which is attached (15 way edge connector), to a PCB of Hewlett Packard manufacture. This later item has a type number 05328-20027 which suggests that it was part of the HP 5328 Counter. The PCB is about half as big again as the XTAL Osc., and has 4

[time-nuts] Administrivia -- febo.com outage

While I was out of town over the weekend, our internet connection (business class Roadrunner) went down and that stopped all febo.com traffic. Connectivity was restored last evening, and mail should catch up soon, if it hasn't already. Sorry for the inconvenience. John ___

Re: [time-nuts] The HP 10811-60111

Roy, I can't tell for sure from your comment if you need the manual for the 10811 but the manual for the 10811AB is available here: http://www.hparchive.com/ I think you might already know of this site but just in case. Joe -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROT

Re: [time-nuts] thoughts on IR thermometers??

Hello Patrick, you got already a lot of good comments. I am using since years a IR temp measurement tool from Snap-on, mod. RTEMP2PB, with a resolution of 0.1 deg. showing in deg. C and F. The distance to spot size is 8:1, a more narrow range would be sometimes preferable but for most cases it is

Re: [time-nuts] Administrivia -- febo.com outage

Thanks for your efforts John it shows how interesting it is as there were queries very soon after that !! Best Wishes Alan G3NYK - Original Message - From: "John Ackermann N8UR" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" ; <[EMAIL PROTECTED]> Sent: Wedne

Re: [time-nuts] The HP 10811-60111

Arnold Thanks for the picture/schematic , this is the item in question, and I can see that it comes from a 5328A manual ! - obviously a different issue from the one on the Agilent website. I gather that the 10544A is another Xtal Osc. module ? - is there compatibility between the two ?? regard

Re: [time-nuts] Thoughts on IR thermometers?

Patrick, After many attempts to get repeatable results from various IR spot thermometers, our design group spent a few $$ with a local independent test lab using their big $$ IR imaging system. The results were amazing & prompted us to just bite the bullet & get one. They have since dropped in pr

Re: [time-nuts] The HP 10811-60111

On Wed, 2008-05-28 at 14:42 +0100, Roy Phillips wrote > the one on the Agilent website. I gather that the 10544A is another > Xtal > Osc. module ? - is there compatibility between the two ?? > regards > > Roy 10811 is the successor of the 10544A. 10811 is possible to put in places the 10544A h

Re: [time-nuts] Thoughts on IR thermometers?

Dear Time-Nuts, A not so off the topic question: Does anyone have some documentation on HP 2804a thermometer? It is using a quarz crystal as the probe, and therefore is an object of interest for the true time-nut. Predrag Dukic At 16:25 28.5.2008, you wrote: >Patrick, > >After many attempts

Re: [time-nuts] 468-DC NBS Time receiver

- Original Message From: Glenn Little WB4UIV <[EMAIL PROTECTED]> To: Time-Nuts list Sent: Monday, May 26, 2008 10:43:26 PM Subject: [time-nuts] 468-DC NBS Time receiver I found one of these in my stuff. Is it good for anything but parts? As I understand it, the service that this recei

[time-nuts] Progin GPS Antenna

Hi, I acquired a GPS antenna for use with a Trimble Thunderbolt (which provides +5V antenna supply voltage) on ebay.de this week (seller "gps-laden"). While initially the seller cited compatibility with 3.3-5V GPS receivers, the actual unit shipped has a label reading "2.7-4.0V", which matches

[time-nuts] NemeriX Awarded Patent For Single-Chip Multi-Band GNSS RF Receiver Technology

Just ran across this one today... Programmable Single Frequency Synthesizer and Flexible Receiver Channels Allow Acquisition of Parallel Signals from GPS, GLONASS and Galileo Systems; Optimised For Current High-End Applications and Future Multi-Band Consumer Applications http://www.nemerix.com/pr

Re: [time-nuts] The HP 10811-60111

Roy Phillips wrote: > Arnold > > Thanks for the picture/schematic , this is the item in question, and I can > see that it comes from a 5328A manual ! - obviously a different issue from > the one on the Agilent website. I gather that the 10544A is another Xtal > Osc. module ? - is there compatibi

Re: [time-nuts] The HP 10811-60111

A 10811 is guaranteed to work in any 10544 socket, but not necessarily vice versa. This enabled HP to avoid having to have a lifetime run of 10544's. The internals are totally different. Besides the different oven design, the oscillator circuit is completely different and it uses an SC cut crysta

Re: [time-nuts] The HP 10811-60111

From: "Rick Karlquist" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] The HP 10811-60111 Date: Wed, 28 May 2008 15:19:41 -0700 (PDT) Message-ID: <[EMAIL PROTECTED]> > A 10811 is guaranteed to work in any 10544 socket, but > not necessarily vice versa. This enabled HP to avoid having > to have a lif

Re: [time-nuts] The HP 10811-60111

I have a number of HP 10811 related documents on my Manual pages at http://www.ko4bb.com/cgi-bin/manuals.pl Search for '10811' Didier KO4BB > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Roy Phillips > Sent: Wednesday, May 28, 2008 4:35 AM > To:

Re: [time-nuts] Thunderbolt Group Buy, part 2

At 04:03 AM 5/27/2008, Tom Van Baak wrote: >Please send any comments or questions to me directly; not to >the whole group. In other words, do not reply to this posting. Sorry to send this on-list, but I'm afraid my direct replies are ending up in your spam filter. Could you please check? (You

Re: [time-nuts] 468-DC NBS Time receiver

Thank you for the reply and the links to the resources. I may use this as a slave display from another time generator. At least I will not waste my time trying to get this to function as it was intended. Thanks 73 Glenn WB4UIV At 12:57 PM 5/28/2008, you wrote: >- Original Message >Fr

[time-nuts] Seaside, OR Swapmeet 5/30 and 5/31

Is anyone going to the swapmeet in Seaside, OR this weekend? I will be sharing a table with l\Larry Christopher. If you will be there please be sure to look me up Dennis Tillman ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] 468-DC NBS Time receiver

I have two of those beauties NIB (except for the razor slit where the manual was removed) and one of the antennas, but no down convertor. TVB had enough data on his site that it didn't look likely that it could be reused as any kind of slave display without rewriting EPROM code. There are people o

Re: [time-nuts] 468-DC NBS Time receiver

Good eve, *** REPLY SEPARATOR *** On 28-May-08 at 22:12 Bill Hawkins wrote: >I have two of those beauties NIB (except for the razor slit where the >manual was removed) and one of the antennas, but no down convertor. TVB had >enough data on his site that it didn't look likely tha

Re: [time-nuts] 468-DC NBS Time receiver

> I have heard rumors that there was a GPS antenna/receiver combo > developed for use with this unit. Supposedly, it was a direct plug-in > replacement for the original antenna. It would absorb the time info > from the GPS stream, remodulate the thing onto the 4.5MHz carrier > that the 468 expects