Re: [time-nuts] FE-5680A Results so far
On Wed, Dec 28, 2011 at 11:14 PM, mike cook michael.c...@sfr.fr wrote: Hi, Just got my cheapo 5680A. It was accompanied by a little teddy bear clutching a L7805CV ! Got a couple of questions. 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. I'm getting a lot more, about 2V peak to peak. What are you loading it with, I'm using a 10X scope probe. How are you measuring the voltage? 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. The voltage in pin 1 is up to you. The spec says you need to supply anything in the range of 15V to 18V. I've been using about 16V from a variable bench type power supply. 3) Could this low input voltage affect output voltage? I was thinking the same thing. I you sure you are looking at the correct pin? I noticed a very low signal on pin-6. The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? Could be your counter has trouble with low amplitude sine wave. Or it is loading the signal. My HP counter has trouble with mV level signals too. But I found my scope has a vertical amp output. Makes the scope work like an RF amp -- . 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.
Re: [time-nuts] FE-5680A Results so far
Artifacts from the TDS210, not from the Rb. On Thu, Dec 29, 2011 at 8:14 AM, mike cook michael.c...@sfr.fr wrote: Hi, Just got my cheapo 5680A. It was accompanied by a little teddy bear clutching a L7805CV ! Got a couple of questions. 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. 3) Could this low input voltage affect output voltage? The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? regards, Mike __**_ 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.
Re: [time-nuts] FE-5680A Results so far
Le 29/12/2011 09:28, Chris Albertson a écrit : 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. I'm getting a lot more, about 2V peak to peak. What are you loading it with, I'm using a 10X scope probe. How are you measuring the voltage? Loaded just by the scope input which I guess is 50ohm. probe is a 1x. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. The voltage in pin 1 is up to you. The spec says you need to supply anything in the range of 15V to 18V. I've been using about 16V from a variable bench type power supply. I'm going to rewire the breadboard. I have a Toshiba 3A 15V supply putting out 15,04. Must be leaking somewhere along the line. I'll see if I have something with a bit more to spare. 3) Could this low input voltage affect output voltage? I was thinking the same thing. I you sure you are looking at the correct pin? I noticed a very low signal on pin-6. I am looking at the right pin, measuring the voltage with TDS function. The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? Could be your counter has trouble with low amplitude sine wave. Or it is loading the signal. My HP counter has trouble with mV level signals too. But I found my scope has a vertical amp output. Makes the scope work like an RF amp -- . Probable. I tried T-ing to an independent counter and the wave form dropped near flat. Thanks for your inputs guys ___ 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] FE 5680a Schematic etc.
For some notes on how to connect an external oscillator to the TBolt see: http://www.thegleam.com/ke5fx/tbolt.htm On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R c...@omen.comwrote: Is there a schematic available? I have a Tbolt that came with a failed oscillator that might enjoy whipping an FE5680A into shape. I'm thinking along the lines of a multi megohm resistor connecting the Tbolt DAC output with some point in the C field regulator. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 __**_ 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.
Re: [time-nuts] FE 5680a Schematic etc.
I'm afraid I wasn't clear. I need a schematic for the FE-5680A so I can add an analog freq control to it. On 12/29/2011 12:59 AM, Azelio Boriani wrote: For some notes on how to connect an external oscillator to the TBolt see: http://www.thegleam.com/ke5fx/tbolt.htm On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R c...@omen.comwrote: Is there a schematic available? I have a Tbolt that came with a failed oscillator that might enjoy whipping an FE5680A into shape. I'm thinking along the lines of a multi megohm resistor connecting the Tbolt DAC output with some point in the C field regulator. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 __**_ 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. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] FE-5680A Results so far
I gave my 5680a several firm whacks with a backscratcher and it did not seem to flinch. On the other hand I've used taps with a jeweler's screwdriver to fine tune my counter's timebase. On 12/29/2011 10:37 AM, Said Jackson wrote: Hello Mike, We measured a couple of these 5680As on a tsc5125a analyzer. With different quality supplies. Very noisy buggers, huge number of spurs and very high noise floor -130dBc or so if I recall correctly. Thats probably the jitter you are seeing. Probably due to the dds generating the output not a crystal. ADEV was parts in E-011 while good, not very good. Frequency accuracy was +5E-010 then tap the box hard and it goes to -1ppb. Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable... These units could really use gps disciplining and a crystal post filter. Great stuff for $40, new they must have been over $1000. Bye, Said On Dec 29, 2011, at 1:14, mike cookmichael.c...@sfr.fr wrote: Hi, Just got my cheapo 5680A. It was accompanied by a little teddy bear clutching a L7805CV ! Got a couple of questions. 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. 3) Could this low input voltage affect output voltage? The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? rega Mike ___ 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. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 attachment: whack.gif___ 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] FE 5680a Schematic etc.
I made an offer on another so I will have multiple units. When one dies I will make a schematic (or if someone has a fried one and sends it to me). On 12/29/2011 8:29 AM, Bill riches wrote: look on this list about a week ago. i wrote up how I did it. very easy. my unit is holding at a few parts to the -11. sorry i do not have file on ipad. bill wa2dvu Sent from my iPad On Dec 29, 2011, at 6:42 AM, Azelio Borianiazelio.bori...@screen.it wrote: Someone here has pointed out how to connect to the C-field control... I can't remember when, must serach the archive. It wasn't long ago because all the FE5680 stuff is very recent. I don't think that a schematic of the FEI Rbs will be ever available officially. On Thu, Dec 29, 2011 at 10:20 AM, Chuck Forsberg WA7KGX N2469Rc...@omen.com wrote: I'm afraid I wasn't clear. I need a schematic for the FE-5680A so I can add an analog freq control to it. On 12/29/2011 12:59 AM, Azelio Boriani wrote: For some notes on how to connect an external oscillator to the TBolt see: http://www.thegleam.com/ke5fx/**tbolt.htmhttp://www.thegleam.com/ke5fx/tbolt.htm On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R c...@omen.comwrote: Is there a schematic available? I have a Tbolt that came with a failed oscillator that might enjoy whipping an FE5680A into shape. I'm thinking along the lines of a multi megohm resistor connecting the Tbolt DAC output with some point in the C field regulator. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshtt**ps://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-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 __**_ 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 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] Subs for obsolete chips in pictic
If you don't get enough interest I can send you a few. Stanley - Original Message - From: Eric Garner garn...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, December 29, 2011 12:00 PM Subject: Re: [time-nuts] Subs for obsolete chips in pictic I located a supply of 74AC175PC for $2 USD at qty 100. I still need 2 of them to finish off all of my PICTIC II's (I have 3 completed). Are there still some available from people willing to part with some? or is there enough interest in that I could distribute enough of them to list members at cost to make an order worth while? -Eric On Mon, Dec 19, 2011 at 10:37 AM, Attila Kinali att...@kinali.ch wrote: On Mon, 12 Dec 2011 09:42:14 -0800 Chris Albertson albertson.ch...@gmail.com wrote: Thanks. The findchips.com suggestion was good. Seems the 74AC part really is not available but there is a CD74ACxxx part that looks good. The CD at the front just means it's from TI instead someone else. The parts are the same. The problem is, the PCB is already made so it is hard to adapt the design to other parts. If I were designing from scratch I'd only select parts that were stocked in high volume by most distributers Not really. Using SMD parts instead of DIL is easy to do. They have the same pinout, just half the size. So a little bit of glue, a few wires and a steady hand are all that is needed to fit one of those in. Alternatively, there are break out boards from SOP/SSOP/SOIC to DIL (but they cost more than it's worth) Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? ___ 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. -- --Eric _ Eric Garner ___ 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] FE-5680A Results so far
On Wed, Dec 28, 2011 at 11:14 PM, mike cook michael.c...@sfr.fr wrote: 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. 3) Could this low input voltage affect output voltage? The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? IME 9.98 to 10.02 is about as good as it gets measuring 10 MHz on the TDS210. I'd guess it's measuring the time between two zero crossings and inverting it. With a horizontal resolution of 1024 divisions, your +/- 0.02 MHz isn't surprising. I got similar frequency measurements on my TDS210 using a 10x probe, but got about 2V pk-pk voltage. The fact you are a factor of 10 out is suspicious - check your probe! Orin. ___ 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] FE-5680A Results so far
Hello Mike, We measured a couple of these 5680As on a tsc5125a analyzer. With different quality supplies. Very noisy buggers, huge number of spurs and very high noise floor -130dBc or so if I recall correctly. Thats probably the jitter you are seeing. Probably due to the dds generating the output not a crystal. ADEV was parts in E-011 while good, not very good. Frequency accuracy was +5E-010 then tap the box hard and it goes to -1ppb. Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable... These units could really use gps disciplining and a crystal post filter. Great stuff for $40, new they must have been over $1000. Bye, Said On Dec 29, 2011, at 1:14, mike cook michael.c...@sfr.fr wrote: Hi, Just got my cheapo 5680A. It was accompanied by a little teddy bear clutching a L7805CV ! Got a couple of questions. 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. 3) Could this low input voltage affect output voltage? The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? rega Mike ___ 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] Subs for obsolete chips in pictic
I located a supply of 74AC175PC for $2 USD at qty 100. I still need 2 of them to finish off all of my PICTIC II's (I have 3 completed). Are there still some available from people willing to part with some? or is there enough interest in that I could distribute enough of them to list members at cost to make an order worth while? -Eric On Mon, Dec 19, 2011 at 10:37 AM, Attila Kinali att...@kinali.ch wrote: On Mon, 12 Dec 2011 09:42:14 -0800 Chris Albertson albertson.ch...@gmail.com wrote: Thanks. The findchips.com suggestion was good. Seems the 74AC part really is not available but there is a CD74ACxxx part that looks good. The CD at the front just means it's from TI instead someone else. The parts are the same. The problem is, the PCB is already made so it is hard to adapt the design to other parts. If I were designing from scratch I'd only select parts that were stocked in high volume by most distributers Not really. Using SMD parts instead of DIL is easy to do. They have the same pinout, just half the size. So a little bit of glue, a few wires and a steady hand are all that is needed to fit one of those in. Alternatively, there are break out boards from SOP/SSOP/SOIC to DIL (but they cost more than it's worth) Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? ___ 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. -- --Eric _ Eric Garner ___ 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] FE 5680a Schematic etc.
look on this list about a week ago. i wrote up how I did it. very easy. my unit is holding at a few parts to the -11. sorry i do not have file on ipad. bill wa2dvu Sent from my iPad On Dec 29, 2011, at 6:42 AM, Azelio Boriani azelio.bori...@screen.it wrote: Someone here has pointed out how to connect to the C-field control... I can't remember when, must serach the archive. It wasn't long ago because all the FE5680 stuff is very recent. I don't think that a schematic of the FEI Rbs will be ever available officially. On Thu, Dec 29, 2011 at 10:20 AM, Chuck Forsberg WA7KGX N2469R c...@omen.com wrote: I'm afraid I wasn't clear. I need a schematic for the FE-5680A so I can add an analog freq control to it. On 12/29/2011 12:59 AM, Azelio Boriani wrote: For some notes on how to connect an external oscillator to the TBolt see: http://www.thegleam.com/ke5fx/**tbolt.htmhttp://www.thegleam.com/ke5fx/tbolt.htm On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R c...@omen.comwrote: Is there a schematic available? I have a Tbolt that came with a failed oscillator that might enjoy whipping an FE5680A into shape. I'm thinking along the lines of a multi megohm resistor connecting the Tbolt DAC output with some point in the C field regulator. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshtt**ps://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-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 __**_ 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 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] FE 5680a Schematic etc.
Someone here has pointed out how to connect to the C-field control... I can't remember when, must serach the archive. It wasn't long ago because all the FE5680 stuff is very recent. I don't think that a schematic of the FEI Rbs will be ever available officially. On Thu, Dec 29, 2011 at 10:20 AM, Chuck Forsberg WA7KGX N2469R c...@omen.com wrote: I'm afraid I wasn't clear. I need a schematic for the FE-5680A so I can add an analog freq control to it. On 12/29/2011 12:59 AM, Azelio Boriani wrote: For some notes on how to connect an external oscillator to the TBolt see: http://www.thegleam.com/ke5fx/**tbolt.htmhttp://www.thegleam.com/ke5fx/tbolt.htm On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R c...@omen.comwrote: Is there a schematic available? I have a Tbolt that came with a failed oscillator that might enjoy whipping an FE5680A into shape. I'm thinking along the lines of a multi megohm resistor connecting the Tbolt DAC output with some point in the C field regulator. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshtt**ps://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-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 __**_ 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] RE Subs for 74AC175 DIP in PIC-TIC
Hello Eric. I have three 74ACT175 if that can be usefull. If you want them, just email me your postal address off-list, you will only have to paypal me the shipping charge. Claude I located a supply of 74AC175PC for $2 USD at qty 100. I still need 2 of them to finish off all of my PICTIC II's (I have 3 completed). Are there still some available from people willing to part with some? or is there enough interest in that I could distribute enough of them to list members at cost to make an order worth while? -Eric On Mon, Dec 19, 2011 at 10:37 AM, Attila Kinaliatt...@kinali.ch wrote: On Mon, 12 Dec 2011 09:42:14 -0800 Chris Albertsonalbertson.ch...@gmail.com wrote: Thanks. The findchips.com suggestion was good. Seems the 74AC part really is not available but there is a CD74ACxxx part that looks good. The CD at the front just means it's from TI instead someone else. The parts are the same. The problem is, the PCB is already made so it is hard to adapt the design to other parts. If I were designing from scratch I'd only select parts that were stocked in high volume by most distributers Not really. Using SMD parts instead of DIL is easy to do. They have the same pinout, just half the size. So a little bit of glue, a few wires and a steady hand are all that is needed to fit one of those in. Alternatively, there are break out boards from SOP/SSOP/SOIC to DIL (but they cost more than it's worth) Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? ___ 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. -- --Eric _ Eric Garner ___ 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] Subs for obsolete chips in pictic
Eric, If you go for the 100, I'll take 10. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eric Garner Sent: Thursday, December 29, 2011 12:00 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Subs for obsolete chips in pictic I located a supply of 74AC175PC for $2 USD at qty 100. I still need 2 of them to finish off all of my PICTIC II's (I have 3 completed). Are there still some available from people willing to part with some? or is there enough interest in that I could distribute enough of them to list members at cost to make an order worth while? -Eric On Mon, Dec 19, 2011 at 10:37 AM, Attila Kinali att...@kinali.ch wrote: On Mon, 12 Dec 2011 09:42:14 -0800 Chris Albertson albertson.ch...@gmail.com wrote: Thanks. The findchips.com suggestion was good. Seems the 74AC part really is not available but there is a CD74ACxxx part that looks good. The CD at the front just means it's from TI instead someone else. The parts are the same. The problem is, the PCB is already made so it is hard to adapt the design to other parts. If I were designing from scratch I'd only select parts that were stocked in high volume by most distributers Not really. Using SMD parts instead of DIL is easy to do. They have the same pinout, just half the size. So a little bit of glue, a few wires and a steady hand are all that is needed to fit one of those in. Alternatively, there are break out boards from SOP/SSOP/SOIC to DIL (but they cost more than it's worth) Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? ___ 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. -- --Eric _ Eric Garner ___ 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] FE-5680A Results so far
On Thu, Dec 29, 2011 at 10:37 AM, Said Jackson saidj...@aol.com wrote: Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable... These units could really use gps disciplining and a crystal post filter. Great stuff for $40, new they must have been over $1000. I had actually thought about a crystal latice filter I think I can find three 10MHz crystals and put them in series. The trouble is I'm not sure what problem the filter might introduce and I don't have a way to measure the filter's performance I'm thinking of adding an RF amplifier using just one 2n5109 and an LC filter. 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.
[time-nuts] line frequency website
Check it out: http://fnetpublic.utk.edu/tabledisplay.html line frequency measurements updated once a second Operated by the Power Information Technology Laboratory at the University of Tennessee, FNET is a low-cost, quickly deployable GPS-synchronized wide-area frequency measurement network. High dynamic accuracy Frequency Disturbance Recorders (FDRs) are used to measure the frequency, phase angle, and voltage of the power system at ordinay 120 V outlets. The measurement data are continuously transmitted via the Internet to the FNET servers hosted at the University of Tennessee and Virginia Tech. The Power IT Lab has developed several applications which use the FNET data to study the power system, including: ___ 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] FE-5680A Results so far
Tried crystal lattice filters, their bw is usually too large (1 to 2khz) I would use a simple pll, such as an exor gate driving a single gate vcxo with 10hz bw. Most crystal oscillators would improve the noise from the dds. So you could do this with four parts: Nc7sz86 exor gate driven by the dds and the crystal, the output driving a 10uf to 100uf tant cap through say a 10k ohm resistor, feed the signal on the cap into a Crystek 10 MHz vcxo. Done. Use an inverter on the exor output for negative slope vcxos. Use an at cut crystal discrete vcxo to avoid paying for the Crystek vcxo. An lc filters bw is even worse (10s of kHz).. Bye, Said On Dec 29, 2011, at 17:53, Chris Albertson albertson.ch...@gmail.com wrote: On Thu, Dec 29, 2011 at 10:37 AM, Said Jackson saidj...@aol.com wrote: Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable... These units could really use gps disciplining and a crystal post filter. Great stuff for $40, new they must have been over $1000. I had actually thought about a crystal latice filter I think I can find three 10MHz crystals and put them in series. The trouble is I'm not sure what problem the filter might introduce and I don't have a way to measure the filter's performance I'm thinking of adding an RF amplifier using just one 2n5109 and an LC filter. 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. ___ 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] line frequency website
http://fnetpublic.utk.edu/gradientmap.html So is Texas on it's own grid, or are they always out of sync with the rest of the nation. ;-) Any idea about the white streak leaving what looks like the Sacramento delta towards Vegas? On 12/29/2011 4:16 PM, Jim Lux wrote: Check it out: http://fnetpublic.utk.edu/tabledisplay.html line frequency measurements updated once a second Operated by the Power Information Technology Laboratory at the University of Tennessee, FNET is a low-cost, quickly deployable GPS-synchronized wide-area frequency measurement network. High dynamic accuracy Frequency Disturbance Recorders (FDRs) are used to measure the frequency, phase angle, and voltage of the power system at ordinay 120 V outlets. The measurement data are continuously transmitted via the Internet to the FNET servers hosted at the University of Tennessee and Virginia Tech. The Power IT Lab has developed several applications which use the FNET data to study the power system, including: ___ 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] line frequency website
On 12/29/11 6:16 PM, gary wrote: http://fnetpublic.utk.edu/gradientmap.html I'm not sure if it's live data or a playback of recorded data, by the way So is Texas on it's own grid, or are they always out of sync with the rest of the nation. ;-) Both. Any idea about the white streak leaving what looks like the Sacramento delta towards Vegas? An artifact in the map drawing application, I'll bet. ___ 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] Thunderbolt?
The era of cheap Thunderbolts appears to be history. What is the simplest GPSDO you can build? There are many designs around but when the T-Bolts came out I think people lost interesting building. I think something very simple could work. If your local oscillator is at all decent it will not loose or gain full cycle in one second. So I think you only need to compare the phase of the oscillator and the PPS. Would an analog controller work? I do software all day every day at work so it would be fun to build an analog computer for a change. 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.
Re: [time-nuts] Thunderbolt? (re simple gpsdo.)
One of the designs using the 10 kHz output from a Jupiter gps engine and a simple PLL to discipline an ocxo might be good starting point if suitable gps engines are still available. There won't be much to tweak but the performance could be quite good. My first gpsdo was a manufactured version of this concept and it consistently beats my thunder bolt from an adev perspective and there is nothing to tweak (: Sent from my iPad On 2011-12-29, at 6:35 PM, Chris Albertson albertson.ch...@gmail.com wrote: The era of cheap Thunderbolts appears to be history. What is the simplest GPSDO you can build? There are many designs around but when the T-Bolts came out I think people lost interesting building. I think something very simple could work. If your local oscillator is at all decent it will not loose or gain full cycle in one second. So I think you only need to compare the phase of the oscillator and the PPS. Would an analog controller work? I do software all day every day at work so it would be fun to build an analog computer for a change. 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. ___ 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] Thunderbolt? (re simple gpsdo.)
I think you are talking about the G3RUH/N1JEZ design. I have built three of them and they work very well. 73 es HNY, Dick, W1KSZ -Original Message- From: Mark Spencer mspencer12...@yahoo.ca Sent: Dec 29, 2011 9:24 PM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) One of the designs using the 10 kHz output from a Jupiter gps engine and a simple PLL to discipline an ocxo might be good starting point if suitable gps engines are still available. There won't be much to tweak but the performance could be quite good. My first gpsdo was a manufactured version of this concept and it consistently beats my thunder bolt from an adev perspective and there is nothing to tweak (: Sent from my iPad On 2011-12-29, at 6:35 PM, Chris Albertson albertson.ch...@gmail.com wrote: The era of cheap Thunderbolts appears to be history. What is the simplest GPSDO you can build? There are many designs around but when the T-Bolts came out I think people lost interesting building. I think something very simple could work. If your local oscillator is at all decent it will not loose or gain full cycle in one second. So I think you only need to compare the phase of the oscillator and the PPS. Would an analog controller work? I do software all day every day at work so it would be fun to build an analog computer for a change. 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. ___ 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] Thunderbolt? (re simple gpsdo.)
Yes that is correct. I have one of the units made by James Miller G3RUH. I had hoped to build some something along these lines on my own, but the Jupiter gps modules I acquired didn't actually have a 10 kHz output. Also my comment re the adev is for the 10 MHz output. I've never looked at the one pps output. Sent from my iPad On 2011-12-29, at 8:45 PM, Richard W. Solomon w1...@earthlink.net wrote: I think you are talking about the G3RUH/N1JEZ design. I have built three of them and they work very well. 73 es HNY, Dick, W1KSZ -Original Message- From: Mark Spencer mspencer12...@yahoo.ca Sent: Dec 29, 2011 9:24 PM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) One of the designs using the 10 kHz output from a Jupiter gps engine and a simple PLL to discipline an ocxo might be good starting point if suitable gps engines are still available. There won't be much to tweak but the performance could be quite good. My first gpsdo was a manufactured version of this concept and it consistently beats my thunder bolt from an adev perspective and there is nothing to tweak (: Sent from my iPad On 2011-12-29, at 6:35 PM, Chris Albertson albertson.ch...@gmail.com wrote: The era of cheap Thunderbolts appears to be history. What is the simplest GPSDO you can build? There are many designs around but when the T-Bolts came out I think people lost interesting building. I think something very simple could work. If your local oscillator is at all decent it will not loose or gain full cycle in one second. So I think you only need to compare the phase of the oscillator and the PPS. Would an analog controller work? I do software all day every day at work so it would be fun to build an analog computer for a change. 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. ___ 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] FE-5680A Results so far
Just FYI, this current batch of FE-5680As has a different RF architecture than the old ones - one of the most notable changes is that although they still have a DDS in them it's not in the output path anymore - the VCXO now runs at 60MHz, and this is divided down (in a CPLD) to produce the 10MHz output - so it's likely that your output measurements are not really applicable to these units. On Fri, Dec 30, 2011 at 2:37 AM, Said Jackson saidj...@aol.com wrote: Hello Mike, We measured a couple of these 5680As on a tsc5125a analyzer. With different quality supplies. Very noisy buggers, huge number of spurs and very high noise floor -130dBc or so if I recall correctly. Thats probably the jitter you are seeing. Probably due to the dds generating the output not a crystal. ADEV was parts in E-011 while good, not very good. Frequency accuracy was +5E-010 then tap the box hard and it goes to -1ppb. Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable... These units could really use gps disciplining and a crystal post filter. Great stuff for $40, new they must have been over $1000. Bye, Said On Dec 29, 2011, at 1:14, mike cook michael.c...@sfr.fr wrote: Hi, Just got my cheapo 5680A. It was accompanied by a little teddy bear clutching a L7805CV ! Got a couple of questions. 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. 3) Could this low input voltage affect output voltage? The box locks after a couple of minutes but my TDS 210 is showing a very jittery ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being powered on. Could this also be an artefact of low main power? rega Mike ___ 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] FE-5680A clock shaping (sine - square wave)
In case it's useful... there are many ways to get a square wave out from a sine wave in, but one straightforward way is with a comparator. Some work better than others. The slow ones won't work at all at 10 MHz, and the very fast comparators (MAX999, ADCMP600, LT1116 etc.) are more expensive, and perhaps harder to work with. I tried a MAX9013 in SO-8 package and it works well for the job. You can see my schematic, circuit and scope plots at the bottom of this page: https://picasaweb.google.com/bealevideo/FE5680A My circuit works best with a sine wave input amplitude above 100 mVpp. Below that level, the duty cycle starts to become noticeably worse. I am using some hysteresis, but it may not be necessary. Previous to those pics on the page, you also see a circuit which did not work so well, using a MAR-1 (broadband DC-1GHz MMIC amp). It's intended as a linear amp, and it does not saturate in a symmetric way even with large input signals. Here are a few other circuits of interest, which I did not try: http://www.ko4bb.com/~bruce/CLKSHPR.html http://www.ko4bb.com/Timing/ClockShaper.php ...and by the way, my FE-5680A shows a consistent -7E-12 per degree C temperature sensitivity (measured at case temp 42 and 52 C). Has anyone else measured theirs? -john beale ___ 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] line frequency website
Our battery-inverter systems follow frequency (or more usually the 4 second AGC signal from the ISO) and give or take power at multi-megawatt levels to stabilize frequency changes. This is the first I've seen a map of the entire CONUS though, interesting stuff! Peter On 12/29/2011 9:20 PM, Jim Lux wrote: On 12/29/11 6:16 PM, gary wrote: http://fnetpublic.utk.edu/gradientmap.html I'm not sure if it's live data or a playback of recorded data, by the way So is Texas on it's own grid, or are they always out of sync with the rest of the nation. ;-) Both. Any idea about the white streak leaving what looks like the Sacramento delta towards Vegas? An artifact in the map drawing application, I'll bet. ___ 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] FE-5680A clock shaping (sine - square wave)
On Thu, Dec 29, 2011 at 9:14 PM, John Beale be...@bealecorner.com wrote: ...and by the way, my FE-5680A shows a consistent -7E-12 per degree C temperature sensitivity (measured at case temp 42 and 52 C). The spec says 3E-10 from -5C to 50C So (3E-10)/55 = 5.5E-12 and you got 7E-12 I'd say it close to what's advertized. 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.
Re: [time-nuts] FE-5680A Results so far
I got twenty 10 MHz rocks from a guy in China a while ago. It was just a few dollars for 21 pieces. The original purpose was to build a 10 MHz TRF receiver. I don't think any of my legacy signal generators are stable enough to characterize these rocks, but the 5680a should do nicely with a bit of hacking into the rs232 port. On 12/29/2011 03:53 PM, Chris Albertson wrote: On Thu, Dec 29, 2011 at 10:37 AM, Said Jacksonsaidj...@aol.com wrote: Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable... These units could really use gps disciplining and a crystal post filter. Great stuff for $40, new they must have been over $1000. I had actually thought about a crystal latice filter I think I can find three 10MHz crystals and put them in series. The trouble is I'm not sure what problem the filter might introduce and I don't have a way to measure the filter's performance I'm thinking of adding an RF amplifier using just one 2n5109 and an LC filter. 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. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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.
