Re: [time-nuts] Questionable question about the Lucent RFTGs
b...@iaxs.net said: Aren't these units vintage 2000? The ROM/PAL stickers on mine say 9905 and 9914. b...@iaxs.net said: The Motorola 68000 CPU was available in 1982 When did HP ship their first GPSDO? Ahh. I have a Z3801A that says: COPYRIGHT 1991-1995 MOTOROLA INC. SFTW P/N # 98-P39972M SOFTWARE VER # 8 SOFTWARE REV # 4 SOFTWARE DATE 13 JUL 1995 A 68000 seems like a good choice to me. It's probably overkill, but that's a whole lot better than running out of CPU and/or the bugs associated with trying to squeeze software that doesn't quite fit. If I had working code, I probably wouldn't rock to boat to save a few pennies. How many of them did they ship? -- These are my opinions. I hate spam. ___ 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] LTE-Lite
On 5 Dec 2014 07:05, David J Taylor david-tay...@blueyonder.co.uk wrote: David it always does a survey. Though even while doing that the frequency output is fine after its had a bit to stabilize. I wanted to bring the survey lamp out to a front panel LED however that appeared to be more work and risk then the value. Have you considered to use a light pipe? Hopefully you could get enough light out. Or is all else fails, use a photodiode to detect the light and drive an LED. Dave. ___ 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] LTE-Lite
Have you considered to use a light pipe? Hopefully you could get enough light out. Or is all else fails, use a photodiode to detect the light and drive an LED. Dave. Good suggestion, Dave. Light pipes used to be very popular, but I couldn't find one when I searched a little while back. Perhaps I was using the wrong search terms! I would have thought that Maplin, for example, would have something. 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] Minicircuits 10% discount in December
On 27 Nov 2014 13:56, Jim Lux jim...@earthlink.net wrote: Time to stock up on those transformers, mixers, amplifiersgrin Throughout the month of December, all online orders of any quantity of any Mini-Circuits catalog model from our web store on minicircuits.com will receive a 10% *discount! I thought I would place my order online to get the discount, whereas I normally do by phone. I decided to order from the USA rather than the UK. MiniCircuits charged me $102 to ship twelve SMA terminations and ten N terminations by UPS. That is their shipping handling change. I could send the same bits from the UK to the USA for less than 50% of that and I don't have a UPS account. A UPS account holder would get a better rate. I can get free shipping in the UK if I spend more than some relatively small amount, but I pay a lot more for the parts. Minicircuits use an exchange rate of close to 1 USD = 1 GBP. I seem to be between a rock and a hard place - either pay a ridiculous exchange rate, or pay a ridiculous shipping handling cost. Dave, G8WRB. ___ 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] Minicircuits 10% discount in December
Am 05.12.2014 um 10:29 schrieb Dr. David Kirkby (Kirkby Microwave Ltd): change rate of close to 1 USD = 1 GBP. I seem to be between a rock and a hard place - either pay a ridiculous exchange rate, or pay a ridiculous shipping handling cost. Dave, G8WRB. Try Digi-Key. Free shipping for orders €65. I have observed delivery times 36h to Germany. It may not be MiniCircuits but Pulse, Macom, Avago, Infineon, EPCOS, Sky, AD, Hittite... Prices are ok. England won't be much different than EU. Gerhard, dk4xp ___ 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] Questionable question about the Lucent RFTGs
Hi On Dec 5, 2014, at 3:11 AM, Hal Murray hmur...@megapathdsl.net wrote: b...@iaxs.net said: Aren't these units vintage 2000? Rumor has it that HP started the project for Lucent *before* the Z3801 came out. Lucent didn’t buy them for a long time. HP decided to chase other customers. The ROM/PAL stickers on mine say 9905 and 9914. b...@iaxs.net said: The Motorola 68000 CPU was available in 1982 …. and the versions on these boards were quite popular through the 1990’s When did HP ship their first GPSDO? Ahh. I have a Z3801A that says: COPYRIGHT 1991-1995 MOTOROLA INC.” So development likely started in the late 1980’s. SFTW P/N # 98-P39972M SOFTWARE VER # 8 SOFTWARE REV # 4 SOFTWARE DATE 13 JUL 1995 A 68000 seems like a good choice to me. It's probably overkill, but that's a whole lot better than running out of CPU and/or the bugs associated with trying to squeeze software that doesn't quite fit. If I had working code, I probably wouldn't rock to boat to save a few pennies. How many of them did they ship? Also consider the need to debug this stuff with the same board as you ship. There is a *lot* of logging and status even in the “customer side” protocols. I’d bet there is even more in in some HP only commands. Bob -- These are my opinions. I hate spam. ___ 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] Minicircuits 10% discount in December
Hi On Dec 5, 2014, at 4:29 AM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 27 Nov 2014 13:56, Jim Lux jim...@earthlink.net wrote: Time to stock up on those transformers, mixers, amplifiersgrin Throughout the month of December, all online orders of any quantity of any Mini-Circuits catalog model from our web store on minicircuits.com will receive a 10% *discount! I thought I would place my order online to get the discount, whereas I normally do by phone. I decided to order from the USA rather than the UK. MiniCircuits charged me $102 to ship twelve SMA terminations and ten N terminations by UPS. That is their shipping handling change. I could send the same bits from the UK to the USA for less than 50% of that and I don't have a UPS account. A UPS account holder would get a better rate. Shipping across the atlantic has become silly expensive over the last decade. There are a *lot* of organizations that are behind the curve on figuring out how to do it cheaply. Bob I can get free shipping in the UK if I spend more than some relatively small amount, but I pay a lot more for the parts. Minicircuits use an exchange rate of close to 1 USD = 1 GBP. I seem to be between a rock and a hard place - either pay a ridiculous exchange rate, or pay a ridiculous shipping handling cost. Dave, G8WRB. ___ 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] Minicircuits 10% discount in December
On 5 Dec 2014 12:23, Bob Camp kb...@n1k.org wrote: Shipping across the atlantic has become silly expensive over the last decade. There are a *lot* of organizations that are behind the curve on figuring out how to do it cheaply. Bob I ship VNA calibration kits across the Atlantic almost every week - admittedly in the other direction. It doesn't cost me anything like what Minicircuits charge. I regularly buy thins sent via Fedex, UPS and DHL, and don't pay so much to ship what must be less than 2 kg - possibly less than 1 kg. I suspect that the handling part of the charge is the real problem. Dave. ___ 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] LTE-Lite
I think the name light pipe has been supplanted by fiber-optic. -Chuck Harris David J Taylor wrote: Have you considered to use a light pipe? Hopefully you could get enough light out. Or is all else fails, use a photodiode to detect the light and drive an LED. Dave. Good suggestion, Dave. Light pipes used to be very popular, but I couldn't find one when I searched a little while back. Perhaps I was using the wrong search terms! I would have thought that Maplin, for example, would have something. 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] LTE-Lite
On 5 Dec 2014 13:19, Chuck Harris cfhar...@erols.com wrote: I think the name light pipe has been supplanted by fiber-optic. -Chuck Harris Technically I agree that they have a lot in common. But I think the large devices, which are often not cylindrical, are usually called light pipes. http://uk.mouser.com/Mobile/Optoelectronics/LED-Indication/LED-Light-Pipes/_/N-b1d20 Some light pipes are hollow inside. I think that is stretching the definition of optical fibre. According to Wikipedia, light pipes or light tubes were originally developed by the ancient Egyptians. Some of these things are hollow are more than 1 m in diameter. I would hardly call that an optical fibre. But call them what you fancy (optical fibre, multi more fibre, waveguide, light tube, light pipe. ...) I think such a device might solve the problem getting the LTE Lite's status LEDs onto a box. I don't have an LTE Lite, but given that they are low power devices, where heat generation is undesirable, I suspect that the light output level might be a bit low. In which case a photodiode or similar may be needed. Dave. ___ 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] Minicircuits 10% discount in December
On 12/5/14, 4:50 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote: On 5 Dec 2014 12:23, Bob Camp kb...@n1k.org wrote: Shipping across the atlantic has become silly expensive over the last decade. There are a *lot* of organizations that are behind the curve on figuring out how to do it cheaply. Bob I ship VNA calibration kits across the Atlantic almost every week - admittedly in the other direction. It doesn't cost me anything like what Minicircuits charge. I regularly buy thins sent via Fedex, UPS and DHL, and don't pay so much to ship what must be less than 2 kg - possibly less than 1 kg. I suspect that the handling part of the charge is the real problem. There's probably some peculiarity that makes it difficult for MiniCircuits. Maybe they have to jump through some export control hoops or there's some hazardous material declaration or some such; and they haven't figured out how to do it cheaply. It could be as simple as it's an outlier and a very manual process. You could send them a nice inquiry and ask.. It is odd, but not surprising. ___ 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] LTE-Lite
We were talking about remotely viewing light from small things like LED's. I hardly think that telling me about a 1m diameter solar light pipe, or the marvels of ancient Egyptians is relevant. I see two types of devices used for moving light remotely: 1) fiber optic, which is a standardized media, and is available off the shelf, and in any length you want. It isn't all the stuff meant to run data around. 2) custom molded acrylic light pipes, which are, well, custom made devices for the situation at hand. Which of the two do you think is more applicable to the OP's needs? -Chuck Harris Dr. David Kirkby (Kirkby Microwave Ltd) wrote: On 5 Dec 2014 13:19, Chuck Harris cfhar...@erols.com wrote: I think the name light pipe has been supplanted by fiber-optic. -Chuck Harris Technically I agree that they have a lot in common. But I think the large devices, which are often not cylindrical, are usually called light pipes. http://uk.mouser.com/Mobile/Optoelectronics/LED-Indication/LED-Light-Pipes/_/N-b1d20 Some light pipes are hollow inside. I think that is stretching the definition of optical fibre. According to Wikipedia, light pipes or light tubes were originally developed by the ancient Egyptians. Some of these things are hollow are more than 1 m in diameter. I would hardly call that an optical fibre. But call them what you fancy (optical fibre, multi more fibre, waveguide, light tube, light pipe. ...) I think such a device might solve the problem getting the LTE Lite's status LEDs onto a box. I don't have an LTE Lite, but given that they are low power devices, where heat generation is undesirable, I suspect that the light output level might be a bit low. In which case a photodiode or similar may be needed. Dave. ___ 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] LTE-Lite
That is a good suggestion. But I fall into the camp. Not really that important now. At least not to get me to pull it out of the rack. :-) The little LED are pretty bright and I remember some broadcast equipment used light pipes. OK now I am going to get silly but this is time-nuts. I think light pipe and fiber optics are two different terms. Yes they both pass light. But a fiber optic is a precision glass or plastic waveguide. A light pipe is a bulk piece of plastic that is not a wave guide in respect to the accuracy of the walls. Oh I am so doomed now that I said that. Regards Paul WB8TSL On Fri, Dec 5, 2014 at 9:10 AM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 5 Dec 2014 13:19, Chuck Harris cfhar...@erols.com wrote: I think the name light pipe has been supplanted by fiber-optic. -Chuck Harris Technically I agree that they have a lot in common. But I think the large devices, which are often not cylindrical, are usually called light pipes. http://uk.mouser.com/Mobile/Optoelectronics/LED-Indication/LED-Light-Pipes/_/N-b1d20 Some light pipes are hollow inside. I think that is stretching the definition of optical fibre. According to Wikipedia, light pipes or light tubes were originally developed by the ancient Egyptians. Some of these things are hollow are more than 1 m in diameter. I would hardly call that an optical fibre. But call them what you fancy (optical fibre, multi more fibre, waveguide, light tube, light pipe. ...) I think such a device might solve the problem getting the LTE Lite's status LEDs onto a box. I don't have an LTE Lite, but given that they are low power devices, where heat generation is undesirable, I suspect that the light output level might be a bit low. In which case a photodiode or similar may be needed. Dave. ___ 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] LTE-Lite
Mount the LTE-lite to the front panel with a cutout and a green bezel so you can see the LEDs directly. -- Brian Lloyd Lloyd Aviation 706 Flightline Drive Spring Branch, TX 78070 br...@lloyd.aero +1.210.802-8FLY (1.210.802-8359) ___ 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] LTE-Lite
The OP said he couldn't find anything applicable when he was looking for light pipe. So, I offered him a suggestion for why. Ultimately, we are talking about locating something using a search engine. The public has taken to the high tech sounding term fiber optic to describe what used to be called a light pipe. If it is thin, and flexible, and moves light from one location to another, it will be known to most people as fiber optic. As an example, sitting here on my workbench is a light that I use to illuminate objects under my Olympus stereo microscope. It is made by Nikon, and has the following words inscribed on its panel: NIKON, Inc. MKII Fiber Optic Light Do you imagine that it is a precision glass or plastic waveguide, or just a flexible light pipe? -Chuck Harris paul swed wrote: That is a good suggestion. But I fall into the camp. Not really that important now. At least not to get me to pull it out of the rack. :-) The little LED are pretty bright and I remember some broadcast equipment used light pipes. OK now I am going to get silly but this is time-nuts. I think light pipe and fiber optics are two different terms. Yes they both pass light. But a fiber optic is a precision glass or plastic waveguide. A light pipe is a bulk piece of plastic that is not a wave guide in respect to the accuracy of the walls. Oh I am so doomed now that I said that. Regards Paul WB8TSL ___ 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] Questionable question about the Lucent RFTGs
HPs unit cost for 68000s would have been very, very good. Add up all the instruments and laser printers (I think the controllers where parcs ?), then add the 1000's of man hours of software experience you can imagine why a 68K. On Thu, Dec 4, 2014 at 12:03 PM, Doug Ronald d...@dougronald.com wrote: I have sort of a dumb question about the Lucent KS-24361 RFTGs. Why do you suppose there is so much compute power in these units? They have the Xilinx FPGA, and the 68000 CPU just to discipline a 5 MHz oscillator? There must be more going on with these devices than meets my eyes. Thanks anyone, -Doug W6DSR ___ 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] Questionable question about the Lucent RFTGs
These dates and versions are from the internal Motorola GPS receiver and not the Z3801A itself.. Op 05-12-14 om 09:11 schreef Hal Murray: b...@iaxs.net said: Aren't these units vintage 2000? The ROM/PAL stickers on mine say 9905 and 9914. b...@iaxs.net said: The Motorola 68000 CPU was available in 1982 When did HP ship their first GPSDO? Ahh. I have a Z3801A that says: COPYRIGHT 1991-1995 MOTOROLA INC. SFTW P/N # 98-P39972M SOFTWARE VER # 8 SOFTWARE REV # 4 SOFTWARE DATE 13 JUL 1995 A 68000 seems like a good choice to me. It's probably overkill, but that's a whole lot better than running out of CPU and/or the bugs associated with trying to squeeze software that doesn't quite fit. If I had working code, I probably wouldn't rock to boat to save a few pennies. How many of them did they ship? ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
Partial recovery of Galileo constellation: http://www.southgatearc.org/news/2014/december/galileo_satellite_recovered_and_transmitting_navigation_signals.htm Edésio ___ 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] Wenzel 100 MHz Oscillators (w/ EFC) available
Hello time-nuts, Please excuse the blatantly commercial announcement, I generally keep business matters off the list, but I have some Wenzel oscillators that may be of interest to time-nuts and wanted to give you first crack at them. These are Wenzel 500-06769 units, custom number for Harris used in microwave radios. Output is 100MHz at +20dBm. Supply input is +12 volts DC (about 500mA at start). EFC runs between 0.5V and 4.5V with positive coefficient and is about 335Hz/V. Unit is in standard 2 x 2 x .75 package. Output connector is female SMA. These would make great units for synthesizer and DDS projects. I don't have the ability to measure the phase noise, but should be relatively good as they were used at microwave frequencies in their past life. I'm asking $50 each for them and $7 (any quantity) Priority Mail shipping to U.S. addresses only. If you would like one (or more) please PayPal to pay...@rdrelectronics.com. I have attached a picture of one unit with the pinout. Regards, Skip Withrow RDR Electronics, Inc. 303-790-1830 8am-5pm M-F ___ 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] Questionable question about the Lucent RFTGs
I didn't think of Selective Availability when I asked the question. Bill Clinton didn't order it turned off until May of 2000, so there is probably active software on the board to emolliate the effects. Also, yes, the 68000 latency most likely required an FPGA's real time capabilities. Thanks everyone for the answers... -Doug W6DSR -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Friday, December 05, 2014 7:29 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Questionable question about the Lucent RFTGs HPs unit cost for 68000s would have been very, very good. Add up all the instruments and laser printers (I think the controllers where parcs ?), then add the 1000's of man hours of software experience you can imagine why a 68K. On Thu, Dec 4, 2014 at 12:03 PM, Doug Ronald d...@dougronald.com wrote: I have sort of a dumb question about the Lucent KS-24361 RFTGs. Why do you suppose there is so much compute power in these units? They have the Xilinx FPGA, and the 68000 CPU just to discipline a 5 MHz oscillator? There must be more going on with these devices than meets my eyes. Thanks anyone, -Doug W6DSR ___ 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 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] LTE-Lite
actually, Magritte had it: “this is not a pipe” Don On Dec 5, 2014, at 8:01 AM, Chuck Harris cfhar...@erols.com wrote: The OP said he couldn't find anything applicable when he was looking for light pipe. So, I offered him a suggestion for why. Ultimately, we are talking about locating something using a search engine. The public has taken to the high tech sounding term fiber optic to describe what used to be called a light pipe. If it is thin, and flexible, and moves light from one location to another, it will be known to most people as fiber optic. As an example, sitting here on my workbench is a light that I use to illuminate objects under my Olympus stereo microscope. It is made by Nikon, and has the following words inscribed on its panel: NIKON, Inc. MKII Fiber Optic Light Do you imagine that it is a precision glass or plastic waveguide, or just a flexible light pipe? -Chuck Harris paul swed wrote: That is a good suggestion. But I fall into the camp. Not really that important now. At least not to get me to pull it out of the rack. :-) The little LED are pretty bright and I remember some broadcast equipment used light pipes. OK now I am going to get silly but this is time-nuts. I think light pipe and fiber optics are two different terms. Yes they both pass light. But a fiber optic is a precision glass or plastic waveguide. A light pipe is a bulk piece of plastic that is not a wave guide in respect to the accuracy of the walls. Oh I am so doomed now that I said that. Regards Paul WB8TSL ___ 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] LTE-Lite
I finally took an ineterest in this thread, because I have needed (rather infrequently) a way to get LED light from a PCB to a front panel. I Googled flexible light pipe (no quotes in the Google search) and got loads of hits for them. So, I guess they're called pipes after all. And they're stocked at Mouser, in various sizel and lengths. How quaint! Check out Mouser's catalog page at http://www.mouser.com/catalog/catalogusd/647/186.pdf. There's probably more, but this was as far as I went. Cheers, Dave M Don Latham wrote: actually, Magritte had it: “this is not a pipe” Don On Dec 5, 2014, at 8:01 AM, Chuck Harris cfhar...@erols.com wrote: The OP said he couldn't find anything applicable when he was looking for light pipe. So, I offered him a suggestion for why. Ultimately, we are talking about locating something using a search engine. The public has taken to the high tech sounding term fiber optic to describe what used to be called a light pipe. If it is thin, and flexible, and moves light from one location to another, it will be known to most people as fiber optic. As an example, sitting here on my workbench is a light that I use to illuminate objects under my Olympus stereo microscope. It is made by Nikon, and has the following words inscribed on its panel: NIKON, Inc. MKII Fiber Optic Light Do you imagine that it is a precision glass or plastic waveguide, or just a flexible light pipe? -Chuck Harris paul swed wrote: That is a good suggestion. But I fall into the camp. Not really that important now. At least not to get me to pull it out of the rack. :-) The little LED are pretty bright and I remember some broadcast equipment used light pipes. OK now I am going to get silly but this is time-nuts. I think light pipe and fiber optics are two different terms. Yes they both pass light. But a fiber optic is a precision glass or plastic waveguide. A light pipe is a bulk piece of plastic that is not a wave guide in respect to the accuracy of the walls. Oh I am so doomed now that I said that. Regards Paul WB8TSL ___ 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] Questionable question about the Lucent RFTGs
d...@dougronald.com said: Also, yes, the 68000 latency most likely required an FPGA's real time capabilities. The 68000 was just a CPU. It didn't have the typical counter/timers (or other IO gear) that are found in many modern chips targeted at the embedded market. Today, you can probably get everything you need on an Arm SOC. That's ROM/Flash, RAM, counter/timer and UART. -- These are my opinions. I hate spam. ___ 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] Questionable question about the Lucent RFTGs
Am 05.12.2014 um 21:20 schrieb Hal Murray: d...@dougronald.com said: The 68000 was just a CPU. It didn't have the typical counter/timers (or other IO gear) that are found in many modern chips targeted at the embedded market. Today, you can probably get everything you need on an Arm SOC. That's ROM/Flash, RAM, counter/timer and UART. The REF1 unit has the 68331 = 68K CPU with Counter/timers, UART, baudrate gen, real time clock, watchdog, address decoders, but no onchip memory. Moto's answer to the 80186. And it's got 2 of them, one on the main board and one in the GPS module. They are good for 16 MHz. High perfomance is different, nowadays. Gerhard (back to looking where I can get clean power for my doubler in the REF1) ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
Dumb Question Time ... Is the Galileo available in North America or only for our overseas brethren ? Tnx, Dick, W1KSZ On 12/5/2014 8:16 AM, Edesio Costa e Silva wrote: Partial recovery of Galileo constellation: http://www.southgatearc.org/news/2014/december/galileo_satellite_recovered_and_transmitting_navigation_signals.htm Edésio ___ 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] LTE-Lite
On 5 Dec 2014 20:05, Dave M dgmin...@mediacombb.net wrote: I finally took an ineterest in this thread, because I have needed (rather infrequently) a way to get LED light from a PCB to a front panel. I Googled flexible light pipe (no quotes in the Google search) and got loads of hits for them. So, I guess they're called pipes after all. I can't help feeling that the name(s) of the device(s) that will allow one to get light from an LED on a PCB to a front panel is a bit off-topic. I think it is fair to say we have ascertained that different people call them by different names, and searching using Google with different names will likely bring benefits over searching with one name. IMHO, we should close this particular part of the thread. Dave ___ 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] PRS-45 Cs Standard
Hi Magnus, It came in today. Looks good from the outside. No obviously bad smells, but I can't power it up, as my PSU hasn't come in yet. There is a paper Datum tag dated 6/2/03 on the outside. Looking through the vent holes, I can see a Datum Cesium Beam Tube assembly Model Number 7613A/077, Part Number 74514-110. I can see that the back two panels have been removed and replaced, but nothing obvious has been done on the inside. There are two SMB connectors on the main board that don't have anything plugged in, but there's nothing obvious that they'd connect to. Does any of that tell me something that I don't want to know? It's going to be a long wait till Monday. =) Bob From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Cc: mag...@rubidium.se Sent: Wednesday, December 3, 2014 1:38 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Hi Bob, The manual is in your inbox. It also describes a DS1 interface, which should be interesting to know what the odd telecom signals is about. :) Cheers, Magnus ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
It's a global system and modern receivers are already capable of augmenting GPS solutions with measurements from Galileo satellites. Henry On Fri, Dec 5, 2014 at 1:08 PM, Richard Solomon w1...@earthlink.net wrote: Dumb Question Time ... Is the Galileo available in North America or only for our overseas brethren ? Tnx, Dick, W1KSZ On 12/5/2014 8:16 AM, Edesio Costa e Silva wrote: Partial recovery of Galileo constellation: http://www.southgatearc.org/news/2014/december/galileo_satellite_recovered_and_transmitting_navigation_signals.htm Edésio ___ 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 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] FYI: Galileo satellite recovered and transmitting navigation signals
Hi Dick, Its available for everyone. It will be as global as GPS. But currently under a system test phase. Three working satellites, one of the first four has some problems. Whats the status of that one now? Two new launched in August experienced a faulty orbit injection. http://ec.europa.eu/enterprise/policies/satnav/galileo/index_en.htm Should be more usable in a year or two. Will have performance much like GPSIII. -- Björn Dumb Question Time ... Is the Galileo available in North America or only for our overseas brethren ? Tnx, Dick, W1KSZ On 12/5/2014 8:16 AM, Edesio Costa e Silva wrote: Partial recovery of Galileo constellation: http://www.southgatearc.org/news/2014/december/galileo_satellite_recovered_and_transmitting_navigation_signals.htm Edésio ___ 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 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] Questionable question about the Lucent RFTGs
Hi On Dec 5, 2014, at 3:20 PM, Hal Murray hmur...@megapathdsl.net wrote: d...@dougronald.com said: Also, yes, the 68000 latency most likely required an FPGA's real time capabilities. The 68000 was just a CPU. It didn't have the typical counter/timers (or other IO gear) that are found in many modern chips targeted at the embedded market. Today, you can probably get everything you need on an Arm SOC. That's ROM/Flash, RAM, counter/timer and UART. …… remember … you also need to do a high precision TDC in there somewhere and sync it up to both the GPS and the local pps. There’s more to it than just a simple divider. There’s also multiple clock domains, something that MCU’s rarely are happy with. Bob -- These are my opinions. I hate spam. ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
he...@pericynthion.org said: It's a global system and modern receivers are already capable of augmenting GPS solutions with measurements from Galileo satellites. I've seen lots of comments about units that will use other than GPS satellites, but I don't think I've seen any actual output from one of them. Is that just a gap in my toy collection or has reality not caught up with the marketing hype? (Or perhaps I just haven't looked in the right place/time.) Typical low cost GPS receivers send out NMEA which includes a list of satellite alt/az and SNR based on the SVN (satellite virtual number, or something like that). How are the Galileo and other satellites going to show up in that? Is there an official plan for something like 1dd for Galileo, 2dd for Glasnost, and ...? -- These are my opinions. I hate spam. ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
Hi On Dec 5, 2014, at 5:25 PM, Hal Murray hmur...@megapathdsl.net wrote: he...@pericynthion.org said: It's a global system and modern receivers are already capable of augmenting GPS solutions with measurements from Galileo satellites. I've seen lots of comments about units that will use other than GPS satellites, but I don't think I've seen any actual output from one of them. Is that just a gap in my toy collection or has reality not caught up with the marketing hype? (Or perhaps I just haven't looked in the right place/time.) They are out there Typical low cost GPS receivers send out NMEA which includes a list of satellite alt/az and SNR based on the SVN (satellite virtual number, or something like that). How are the Galileo and other satellites going to show up in that? Is there an official plan for something like 1dd for Galileo, 2dd for Glasnost, and …? Typically they let you selectively enable each of the major systems. As you enable more systems, you get more sat’s in each of the messages. For most users, there is not a lot of reason to enable multiple systems. If you want UTC sync’d to USNO you enable one system. If you want to set your watch to time from Moscow, you enable another system …. Setting your watch to both is impractical. Bob -- These are my opinions. I hate spam. ___ 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] Wenzel 100 MHz Oscillators (w/ EFC) available
These would make great units for synthesizer and DDS projects. I don't have the ability to measure the phase noise, but should be relatively good as they were used at microwave frequencies in their past life. I'm asking $50 each for them and $7 (any quantity) Priority Mail shipping to U.S. addresses only. If you would like one (or more) please PayPal to pay...@rdrelectronics.com. I have attached a picture of one unit with the pinout. I have a few of the 500-6769 parts here, and measured a couple of them awhile back: http://www.ke5fx.com/Wenzel_500_06769_PN.png Not a bad price at all. If a $2000 OCXO can achieve -140 dBc/Hz at 100 Hz and a $50 OCXO will do -117, that's almost 10 dB better than the expected 20*log10($2000 / $50) ratio. :) -- john, KE5FX Miles Design LLC ___ 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] Wenzel 100 MHz Oscillators (w/ EFC) available
Skip: I would like one, if you have any left. How do I pay? Thanks, Jim wb4...@amsat.org On 12/5/2014 1:00 PM, Skip Withrow wrote: Hello time-nuts, Please excuse the blatantly commercial announcement, I generally keep business matters off the list, but I have some Wenzel oscillators that may be of interest to time-nuts and wanted to give you first crack at them. These are Wenzel 500-06769 units, custom number for Harris used in microwave radios. Output is 100MHz at +20dBm. Supply input is +12 volts DC (about 500mA at start). EFC runs between 0.5V and 4.5V with positive coefficient and is about 335Hz/V. Unit is in standard 2 x 2 x .75 package. Output connector is female SMA. These would make great units for synthesizer and DDS projects. I don't have the ability to measure the phase noise, but should be relatively good as they were used at microwave frequencies in their past life. I'm asking $50 each for them and $7 (any quantity) Priority Mail shipping to U.S. addresses only. If you would like one (or more) please PayPal to pay...@rdrelectronics.com. I have attached a picture of one unit with the pinout. Regards, Skip Withrow RDR Electronics, Inc. 303-790-1830 8am-5pm M-F ___ 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. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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] FYI: Galileo satellite recovered and transmitting navigation signals
On 05/12/14 22:40, Bob Camp wrote: Typically they let you selectively enable each of the major systems. As you enable more systems, you get more sat’s in each of the messages. For most users, there is not a lot of reason to enable multiple systems. If you want UTC sync’d to USNO you enable one system. If you want to set your watch to time from Moscow, you enable another system …. Setting your watch to both is impractical. Time-nuts will buy multiple, enable one major system on each, and compare, and draw ADEV plots! Iain ___ 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] PRS-45 Cs Standard
Bob, Do open up and take a look. Do take photos. Do share. :) Bet the bottom plate is a good start. Cheers, Magnus On 12/05/2014 10:31 PM, Bob Stewart wrote: Hi Magnus, It came in today. Looks good from the outside. No obviously bad smells, but I can't power it up, as my PSU hasn't come in yet. There is a paper Datum tag dated 6/2/03 on the outside. Looking through the vent holes, I can see a Datum Cesium Beam Tube assembly Model Number 7613A/077, Part Number 74514-110. I can see that the back two panels have been removed and replaced, but nothing obvious has been done on the inside. There are two SMB connectors on the main board that don't have anything plugged in, but there's nothing obvious that they'd connect to. Does any of that tell me something that I don't want to know? It's going to be a long wait till Monday. =) Bob From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Cc: mag...@rubidium.se Sent: Wednesday, December 3, 2014 1:38 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Hi Bob, The manual is in your inbox. It also describes a DS1 interface, which should be interesting to know what the odd telecom signals is about. :) Cheers, Magnus ___ 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] Wenzel 100 MHz Oscillators (w/ EFC) available
Am 05.12.2014 um 23:54 schrieb John Miles: I have a few of the 500-6769 parts here, and measured a couple of them awhile back: http://www.ke5fx.com/Wenzel_500_06769_PN.png Not a bad price at all. If a $2000 OCXO can achieve -140 dBc/Hz at 100 Hz and a $50 OCXO will do -117, that's almost 10 dB better than the expected 20*log10($2000 / $50) ratio. :) Ok, not an oven, but @100 Hz offset, that ElCheapo Crystek is on par. If it was a few dB better far out, it would outwenzel the Wenzel, phasenoise-wise. -117 is not a heroic deed. And the oven makes it easier to get along with a smaller tuning range, that helps a lot. Just forget these temperature corner cases that are major stumble stones in XO design. http://www.digikey.de/product-search/de?x=17y=16lang=desite=deKeyWords=cvhd950 regards, Gerhard ___ 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] PRS-45 Cs Standard
Hi Magnus, I'll certainly do that, but I'm waiting to pull the panels until I know that it works. I don't want a finger pointing at me saying I broke it. The reason I posed the question was that I'm wondering if this thing, at 11 1/2 years old, is on it's last dying legs. But, I suppose I won't find that out until it's powered up and I can download the status string. What will I be looking for? I think I've read something about ion pump current from past posts about rehabilitating an old Cs standard. I'll have to go back through that thread. Bob From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Cc: mag...@rubidium.se Sent: Friday, December 5, 2014 6:10 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Bob, Do open up and take a look. Do take photos. Do share. :) Bet the bottom plate is a good start. Cheers, Magnus On 12/05/2014 10:31 PM, Bob Stewart wrote: Hi Magnus, It came in today. Looks good from the outside. No obviously bad smells, but I can't power it up, as my PSU hasn't come in yet. There is a paper Datum tag dated 6/2/03 on the outside. Looking through the vent holes, I can see a Datum Cesium Beam Tube assembly Model Number 7613A/077, Part Number 74514-110. I can see that the back two panels have been removed and replaced, but nothing obvious has been done on the inside. There are two SMB connectors on the main board that don't have anything plugged in, but there's nothing obvious that they'd connect to. Does any of that tell me something that I don't want to know? It's going to be a long wait till Monday. =) Bob From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Cc: mag...@rubidium.se Sent: Wednesday, December 3, 2014 1:38 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Hi Bob, The manual is in your inbox. It also describes a DS1 interface, which should be interesting to know what the odd telecom signals is about. :) Cheers, Magnus ___ 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 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] FYI: Galileo satellite recovered and transmitting navigation signals
Hi On Dec 5, 2014, at 6:32 PM, Iain Young i...@g7iii.net wrote: On 05/12/14 22:40, Bob Camp wrote: Typically they let you selectively enable each of the major systems. As you enable more systems, you get more sat’s in each of the messages. For most users, there is not a lot of reason to enable multiple systems. If you want UTC sync’d to USNO you enable one system. If you want to set your watch to time from Moscow, you enable another system …. Setting your watch to both is impractical. Time-nuts will buy multiple, enable one major system on each, and compare, and draw ADEV plots! Running one locked to each system is really the only approach that makes sense. There inevitably are minor differences in systems and trying to average things out is not the best way to do it. Bob Iain ___ 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] PRS-45 Cs Standard
Hi What counts is running hours. There is no way to know how many running hours the gizmo has just from looking at the manufacturing date. It could have been constant service the whole time. It might have just sat on a spares shelf. Another pretty good bet is that it was a sales demo unit that saw intermittent use over the time period. If there are no (obvious) asset tags or company property stickers on it, the sales demo bumps up the list a bit. Bob On Dec 5, 2014, at 8:37 PM, Bob Stewart b...@evoria.net wrote: Hi Magnus, I'll certainly do that, but I'm waiting to pull the panels until I know that it works. I don't want a finger pointing at me saying I broke it. The reason I posed the question was that I'm wondering if this thing, at 11 1/2 years old, is on it's last dying legs. But, I suppose I won't find that out until it's powered up and I can download the status string. What will I be looking for? I think I've read something about ion pump current from past posts about rehabilitating an old Cs standard. I'll have to go back through that thread. Bob From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Cc: mag...@rubidium.se Sent: Friday, December 5, 2014 6:10 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Bob, Do open up and take a look. Do take photos. Do share. :) Bet the bottom plate is a good start. Cheers, Magnus On 12/05/2014 10:31 PM, Bob Stewart wrote: Hi Magnus, It came in today. Looks good from the outside. No obviously bad smells, but I can't power it up, as my PSU hasn't come in yet. There is a paper Datum tag dated 6/2/03 on the outside. Looking through the vent holes, I can see a Datum Cesium Beam Tube assembly Model Number 7613A/077, Part Number 74514-110. I can see that the back two panels have been removed and replaced, but nothing obvious has been done on the inside. There are two SMB connectors on the main board that don't have anything plugged in, but there's nothing obvious that they'd connect to. Does any of that tell me something that I don't want to know? It's going to be a long wait till Monday. =) Bob From: Magnus Danielson mag...@rubidium.dyndns.org To: time-nuts@febo.com Cc: mag...@rubidium.se Sent: Wednesday, December 3, 2014 1:38 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Hi Bob, The manual is in your inbox. It also describes a DS1 interface, which should be interesting to know what the odd telecom signals is about. :) Cheers, Magnus ___ 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 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] FYI: Galileo satellite recovered and transmitting navigation signals
kb...@n1k.org said: Running one locked to each system is really the only approach that makes sense. There inevitably are minor differences in systems and trying to average things out is not the best way to do it. Anybody have suggestions for a low cost receiver to run that test? -- These are my opinions. I hate spam. ___ 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] PRS-45 Cs Standard
Do open up and take a look. Do take photos. Do share. :) Bet the bottom plate is a good start. Cheers, Magnus Perhaps you can also post the manual to Didier's site (ko4bb.com) so we can all follow along? Best regards, Charles ___ 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] PRS-45 Cs Standard
Hi Bob, It's pretty much clean. There is a Datum is now Symmetricom decal, as well as a Symmetricom decal. There is a round paper sticker that says Datum TTM with a date and probably someone's initials. And what looks like a small paper sticker on the back that was removed. There was also a chassis ground that was so badly attached I can't imagine it ever being done in a working environment. Nothing else. I may have gotten lucky. Guess I'll find out next week when my power supply comes in. BTW, I did find the post I was thinking of. It was by Bill Ezell back in 2008: https://www.febo.com/pipermail/time-nuts/2008-June/031941.html Bob From: Bob Camp kb...@n1k.org To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, December 5, 2014 8:14 PM Subject: Re: [time-nuts] PRS-45 Cs Standard Hi What counts is running hours. There is no way to know how many running hours the gizmo has just from looking at the manufacturing date. It could have been constant service the whole time. It might have just sat on a spares shelf. Another pretty good bet is that it was a sales demo unit that saw intermittent use over the time period. If there are no (obvious) asset tags or company property stickers on it, the sales demo bumps up the list a bit. Bob ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
On Dec 5, 2014, at 9:36 PM, Hal Murray hmur...@megapathdsl.net wrote: kb...@n1k.org said: Running one locked to each system is really the only approach that makes sense. There inevitably are minor differences in systems and trying to average things out is not the best way to do it. Anybody have suggestions for a low cost receiver to run that test? Low cost … hmmm …. The stuff we normally buy is surplus / used. That makes it the 10 cents or 1 cent on the dollar that we’re used to paying. This stuff (by definition) is brand new and fresh on the market. LTE-Lite will do QZSS .. might not have sat’s overhead in your location :) Google suggests: Meinberg has the GLN180PEX that will do Glonass timing Teseo-3 / Teseo-2 do various constellations uBlox 6 claims GPS / Glonass / QZSS http://www.u-blox.com/images/downloads/Product_Docs/u-blox6-GPS-GLONASS-QZSS-V14_ReceiverDescriptionProtocolSpec_Public_(GPS.G6-SW-12013).pdf A bunch of Garmin stuff will do Glonass https://support.garmin.com/support/searchSupport/case.faces?caseId=%7Ba3bcf150-1fa1-11e1-73d0-%7D Furuno GT-87 has Glonass and QZSS NovAtel OEM6 has Glonass, Galileo, and BeiDou Bob -- These are my opinions. I hate spam. ___ 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] Wenzel 100 MHz Oscillators (w/ EFC) available
John Skip, as I am getting 5 such oscillators, I will open 2 or three (after measurements of the PN ) and apply some magic... To build something like this mechanically will be tough. The technology and circuit design will have changed a lot in 10 + years, so I will try. Opening the units may be the tough part. 73 de Ulrich x I have a few of the 500-6769 parts here, and measured a couple of them awhile back: http://www.ke5fx.com/Wenzel_500_06769_PN.png Not a bad price at all. If a $2000 OCXO can achieve -140 dBc/Hz at 100 Hz and a $50 OCXO will do -117, that's almost 10 dB better than the expected 20*log10($2000 / $50) ratio. :) -- john, KE5FX Miles Design LLC In a message dated 12/5/2014 2:26:24 P.M. Eastern Standard Time, ka2...@aol.com writes: I can measure all things, if you need help, tell me ! Ulrich In a message dated 12/5/2014 2:13:34 P.M. Eastern Standard Time, skip.with...@gmail.com writes: Hello Ulrich, The units have been paid for and are being sent Priority Mail. Pleasure doing business with you. If you have any feedback on what the phase noise does look like I would certainly be interested in the data. Regards, Skip Withrow On Fri, Dec 5, 2014 at 11:06 AM, _KA2WEU@aol.com_ (mailto:ka2...@aol.com) wrote: Skip, can I have 5 , mail to me , how would you like to get paid ? Can I give you our FedEx number . Thanks, Ulrich xxx Ulrich L. Rohde, Ph.D. Chairman Synergy Microwave Corporation 201 McLean Boulevard Paterson, NJ 07504 Phone: _973-881-8800_ (tel:973-881-8800) Fax: _973-881-1924_ (tel:973-881-1924) In a message dated 12/5/2014 1:00:56 P.M. Eastern Standard Time, _skip.withrow@gmail.com_ (mailto:skip.with...@gmail.com) writes: Hello time-nuts, Please excuse the blatantly commercial announcement, I generally keep business matters off the list, but I have some Wenzel oscillators that may be of interest to time-nuts and wanted to give you first crack at them. These are Wenzel 500-06769 units, custom number for Harris used in microwave radios. Output is 100MHz at +20dBm. Supply input is +12 volts DC (about 500mA at start). EFC runs between 0.5V and 4.5V with positive coefficient and is about 335Hz/V. Unit is in standard 2 x 2 x .75 package. Output connector is female SMA. These would make great units for synthesizer and DDS projects. I don't have the ability to measure the phase noise, but should be relatively good as they were used at microwave frequencies in their past life. I'm asking $50 each for them and $7 (any quantity) Priority Mail shipping to U.S. addresses only. If you would like one (or more) please PayPal to _paypal@rdrelectronics.com_ (mailto:pay...@rdrelectronics.com) . I have attached a picture of one unit with the pinout. Regards, Skip Withrow RDR Electronics, Inc. _303-790-1830_ (tel:303-790-1830) 8am-5pm M-F ___ time-nuts mailing list -- _time-nuts@febo.com_ (mailto: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] FYI: Galileo satellite recovered and transmitting navigation signals
Hello, One vendor we starts nimea strings with BD and GN instead of GP ie $GPGGA,blab, blab becomes $BDGGA,blab and $GNGGA,blab If all systems are selected and the receiver has enough of each system you can have up to three $*GGA messages per update. Link On Dec 5, 2014, at 3:32 PM, Iain Young i...@g7iii.net wrote: On 05/12/14 22:40, Bob Camp wrote: Typically they let you selectively enable each of the major systems. As you enable more systems, you get more sat’s in each of the messages. For most users, there is not a lot of reason to enable multiple systems. If you want UTC sync’d to USNO you enable one system. If you want to set your watch to time from Moscow, you enable another system …. Setting your watch to both is impractical. Time-nuts will buy multiple, enable one major system on each, and compare, and draw ADEV plots! Iain ___ 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] GPS, NTP, and Cisco routers...
Dear all, Do any one still using Cisco 7200 as NTP master? and get ref clock from Microsemi GPS TOD via Aux port I used to have a TimeSource3600 to feed TOD to a Cisco7204VXR, but the TS3600 was dead, and I TimeSource3550 was installed. But I found the 7204 cannot get a reliable PPS from the TS3550. In 7204, I use below command: line aux 0 ntp refclock telecom-solutions pps cts stratum 0 no exec transport input all stopbits 1 line vty 0 4 exec-timeout 20 0 ! ntp access-group query-only 95 ntp access-group peer 96 ntp access-group serve 97 ntp access-group serve-only 98 ntp master In TS3550, I set the TOD format to Cisco, and a TOD converter was installed. The 7204 can sync to GPS after a reboot. but after some time (form min. to an hour) it will lost sync to GPS and said Bad Time or No PPS signal in sh ntp asso detail and sh line aux wil indicate alot of noise overrun 7204 sh ntp ass de 127.127.7.1 configured, our_master, sane, valid, stratum 7 ref ID 127.127.7.1, time D8212701.14C20B50 (12:28:49.081 HKT Thu Nov 27 2014) our mode active, peer mode passive, our poll intvl 64, peer poll intvl 64 root delay 0.00 msec, root disp 0.00, reach 377, sync dist 0.015 delay 0.00 msec, offset 0. msec, dispersion 0.02 precision 2**18, version 3 org time D8212701.14C20B50 (12:28:49.081 HKT Thu Nov 27 2014) rcv time D8212701.14C20B50 (12:28:49.081 HKT Thu Nov 27 2014) xmt time D8212701.14C1C10F (12:28:49.081 HKT Thu Nov 27 2014) filtdelay = 0.000.000.000.000.000.000.000.00 filtoffset =0.000.000.000.000.000.000.000.00 filterror = 0.020.991.972.943.924.905.876.85 Reference clock status: Running normally Timecode: --More-- 127.127.6.1 configured, insane, invalid, unsynced, stratum 0 ref ID .GPS., time . (08:00:00.000 HKT Mon Jan 1 1900) our mode active, peer mode unspec, our poll intvl 64, peer poll intvl 64 root delay 0.00 msec, root disp 0.00, reach 0, sync dist 103.516 delay 0.00 msec, offset 0. msec, dispersion 16000.00 precision 2**20, version 3 org time . (08:00:00.000 HKT Mon Jan 1 1900) rcv time . (08:00:00.000 HKT Mon Jan 1 1900) xmt time D8212733.14C1CF13 (12:29:39.081 HKT Thu Nov 27 2014) filtdelay = 0.000.000.000.000.000.000.000.00 filtoffset =0.000.000.000.000.000.000.000.00 filterror = 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 Reference clock status: No PPS signal Timecode: *,A,56989,14/11/27,04:29:47,+00.0,0,22N22.238,114E07.820,+0095 sh lin aux 0 Tty Typ Tx/RxA Modem Roty AccO AccI Uses Noise Overruns Int *1 AUX 9600/9600 -- --- 0 581 1/799854 - Line 1, Location: , Type: Length: 24 lines, Width: 80 columns Baud rate (TX/RX) is 9600/9600, no parity, 1 stopbits, 8 databits Status: Ready, Active, Modem Signals Polled Capabilities: EXEC Suppressed, NTP Reference Clock, PPS Reference Clock Modem state: Ready Modem hardware state: CTS* noDSR DTR RTS Special Chars: Escape Hold Stop Start Disconnect Activation ^^xnone - - none Timeouts: Idle EXECIdle Session Modem Answer Session Dispatch 00:10:00nevernone not set Idle Session Disconnect Warning never Login-sequence User Response 00:00:30 Autoselect Initial Wait not set Modem type is unknown. Session limit is not set. Time since activation: never Editing is enabled. History is enabled, history size is 10. DNS resolution in show commands is enabled Full user help is disabled Allowed input transports are pad v120 telnet. Allowed output transports are pad v120 telnet. Preferred transport is telnet. No output characters are padded No special data dispatching characters End I had replace the 7204, reboot the TS3550, replace TOD converter and related cable.but no luck. Any idea? Dear Mark Allwright, Can I have your Application Note 600? Thanks in advance for any suggestion. Best Reg. Bob ___ 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] Questionable question about the Lucent RFTGs
Do any have the 68332 ? That's got the TPU - Time Processing Unit. Pretty good at multiple time domains or, in their frequent job as engine controllers, mixed time/crank angle domains. On Fri, Dec 5, 2014 at 9:17 PM, Gerhard Hoffmann dk...@arcor.de wrote: Am 05.12.2014 um 21:20 schrieb Hal Murray: d...@dougronald.com said: The 68000 was just a CPU. It didn't have the typical counter/timers (or other IO gear) that are found in many modern chips targeted at the embedded market. Today, you can probably get everything you need on an Arm SOC. That's ROM/Flash, RAM, counter/timer and UART. The REF1 unit has the 68331 = 68K CPU with Counter/timers, UART, baudrate gen, real time clock, watchdog, address decoders, but no onchip memory. Moto's answer to the 80186. And it's got 2 of them, one on the main board and one in the GPS module. They are good for 16 MHz. High perfomance is different, nowadays. Gerhard (back to looking where I can get clean power for my doubler in the REF1) ___ 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] FYI: Galileo satellite recovered and transmitting navigation signals
From: Hal Murray I've seen lots of comments about units that will use other than GPS satellites, but I don't think I've seen any actual output from one of them. Is that just a gap in my toy collection or has reality not caught up with the marketing hype? (Or perhaps I just haven't looked in the right place/time.) [] === Hal, The GLONASS satellites show on my Moto-G phone with the GPS Status program. They have numbers from 64 upwards. As yet I have not looked for or seen any Galileo satellites. Some recent u-blox units should see GLONASS but I don't think my LTE-Lite has a way of setting that (please tell me I'm wrong) and the recently mentioned Reyax module should also be able to do this: http://www.reyax.com/Module/GPS/RY825AI/RY825AI.pdf I've yet to power mine up. 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.
