Re: [time-nuts] Got 60Hz?
I recently worked on a similar project, but wanted to create a 50 Hz output to be able torun a Mostek MK50250 clock chip in 24-hr/50Hz mode. I also wanted the stability of acrystal to avoid the daily variations of the local AC power source frequency. I could easily have created 50 Hz from an accurate reference source, but I wanted to havea separate circuit which could run on a battery during power outages and in case of loss ofthe reference source. To be accurate to one second in a 24-hour period the oscillator only has to be accurate to1 part in 86400, which is available in a relatively inexpensive 14-pin can type. If you picka convenient multiple of 60 Hz it is a simple matter to put together a divider chain. For anexample, you could use a 12 MHz oscillator with the C8051 board you mention to get120 Hz, then divide by 2 to get 60 Hz for your clock. For long-term accuracy you could then divide the 60 Hz and compare it to your masterreference every second, 10 seconds, 100 seconds, etc. until you reach an error count ofplus or minus one count, then add or subtract one count from your clock oscillatordivider. If you choose an oscillator that is slightly high in frequency, you would only have to subtractpulses every so often, which should be fairly simple to do. This method is very similar to the old Master/Slave mechanical clocks, where the slaveclocks ran fast by a few seconds per day. They were then stopped at midnight until theywere started again by a pulse from the master clock when it reached 00:00:00. -- Flemming Larsen --- Den ons 8/12/10 skrev Michael Poulos : Fra: Michael Poulos Emne: [time-nuts] Got 60HZ? Til: "Discussion of precise time and frequency measurement" Dato: onsdag 8. december 2010 20.13 Recently I bought a Efratom Ru frequency standard from eBay and a frequency divider chip that makes 1MHZ,100KHZ,25KHZ,10KHZ,100HZ and a 1HZ output. Today I thought of a way to make a nice 60HZ so you can use a mains-powered clock for the display (using amplifier and transformer wired "backwards"). But, now you'll need 60HZ. A European has it easy with 50HZ as you use a BASIC Stamp or Arduino to divide the 100HZ output. But for 60HZ I came up with a solution: You set up the Arduino to take the 10KHZ from the divider chip and program it to count off 83 pulses to flip an output. But wait! Unless you add a "leap count" every 3 flips of the output, it'll run fast. Assume at the start the Arduino output starts high then turns low: (83+83+84+83+83+84)*20 = 10,000 pulses = one second H__L__H__L__H__L Every output cycle and a half the voltage swing is a little over 1 percent longer because of the leap count. This means that the distortion adds a slight inaccuracy, not enough to upset New Year's revelers. But if you want a better 60HZ, try using the 100KHZ: (833+833+834+833+833+834)*20 = one second You see where this is going with leap counts. The ultimate of course is one really good Arduino and (after a hex inverter to amplify it) take the straight 10MHZ and apply this leap count technique: (8+8+83334+8+8+83334)*20 = one really accurately made 60HZ = one nice second, just the thing for a Nixie clock. :) Now, what is a good hex inverter to take the 10 million HZ of my rubidiom movement to feed a frequency divider chip (and later Arduino)? It needs to take the .5 of a volt sinewave and squarewave it and in a normal 14 pin DIP (breadboardable) package. ___ 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] Ruthenium?
If you have a spare US$ 47,500 lying around, you can buy a Ruthenium Watch on eBay. No word about its accuracy though. You can also buy the ruthenium and make your own for a lot less. -- Flemming Larsen Bruce wrote: Ruthenium (Ru) clocks are somewhat scarce. Bruce ___ 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] 3586A HQ PDF Manual available -optimization-
In a message dated 10/12/2010 10:19:08 GMT Standard Time, rbarri...@msn.com writes: I've downloaded the reduced-size PDF and, although not very obvious, there is loss of quality. See the attached comparison and see how sharpness is reduced on the optimized capture at the right side. My goal was to create the highest possible quality manuals, using the big sharp scans found at KO4BB website. I'd prefer to release them as good (and big) as possible so that anyone who needs it can reduce the size (always at a cost). The optimization can be done at any time but the lost bits are lost forever, - I've also found that the Adobe optimisation option needs to be used with care and subtle, and sometimes not so subtle, loss of quaility seems to be inevitable. I never use it now on files intended for distribution. Whilst modern scanners can produce excellent quality in terms of resolution etc the two big problems I've observed with them, and with the scanning techniques they seem to encourage, are the very large default file sizes they tend to produce and the much reduced contrast, with the latter usually being much more of a nuisance. Both seem to be due to the way in which everything gets treated as colour or greyscale and the only way I've found so far found of dealing with this on completed PDFs is to extract all the pages as TIF files and process them individually for contrast enhancement etc, and superfluous color depth reduction, in something like Photoshop or PaintShopPro. I've had some good results with this but you sure need one heck of a lot of patience and spare time, so mostly these days I give thanks for large hard drives and just try to live with it:-) regards Nigel GM8PZR ___ 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] Got 60HZ?
Hi Easier to do with a cheap pic. If all you want is 60 Hz of of a 10 MHz source, load up one of the timers / PWM's. Change the load as required to hit 60 Hz. Might be <10 lines of code, certainly not over a couple dozen. Bob On Dec 10, 2010, at 1:53 AM, Chris Albertson wrote: > On Thu, Dec 9, 2010 at 4:19 PM, Michael Poulos wrote: > > >> The chip number is a C8051T602.It's actually a tiny printed circuit card in >> a DIP chip pinout format. Anyone know of a microcontroller that'll take >> the >> raw sinewave from a Ru movement? > > The C8051T602 is a micro controller. 8051 is a very common part. > If it did a divide by ten function it was because it was loaded with software. > -- > = > 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] Got 60HZ?
It is actually RuPaulium, gentlemen, and it will make your clock get up and dance! On Fri, Dec 10, 2010 at 12:07 AM, Bruce Griffiths < bruce.griffi...@xtra.co.nz> wrote: > WB6BNQ wrote: > >> Michael Poulos wrote: >> >> snip >> >> >> >>> Like any frequency multiply scheme you need a really accurate >>> reference source... like a Ru movement. >>> >>> >>> >> Not to be too nit picky (this is timenuts after all) ... the proper >> abbreviation >> for Rubidium (it is an element) is Rb. >> >> >> BillWB6BNQ >> >> >> >> ___ >> 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. >> >> >> > Ruthenium (Ru) clocks are somewhat scarce. > > Bruce > > > > ___ > 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] Got 60HZ?
On Thu, Dec 9, 2010 at 2:47 AM, francesco messineo < francesco.messi...@gmail.com> wrote: > Hello, > > > if you are not afraid of a little microcontroller programming, why not > use a software DDS approach like this: > > > http://www.myplace.nu/avr/minidds/index.htm > > or this: http://www.ko4bb.com/Test_Equipment/AFSignalGenerator/SigGen.php no need to design a PWB, the toolstick costs $9.95 and the code is already written. Didier KO4BB ___ 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] 3586A HQ PDF Manual available -optimization-
Hi all, why isn`t please, with respect to all working persones, the "DJVU-Formating " better as all experiments to reduce some from datavolume? Regularly it needs only ~10%-20% memory as pdf-files... Best greetings! Karesz 2010/12/10 > > In a message dated 10/12/2010 10:19:08 GMT Standard Time, > rbarri...@msn.com > writes: > > I've downloaded the reduced-size PDF and, although not very obvious, there > is loss of quality. See the attached comparison and see how sharpness is > reduced on the optimized capture at the right side. My goal was to create > the highest possible quality manuals, using the big sharp scans found at > KO4BB website. I'd prefer to release them as good (and big) as possible so > that anyone who needs it can reduce the size (always at a cost). The > optimization can be done at any time but the lost bits are lost forever, > > > > - > I've also found that the Adobe optimisation option needs to be used with > care and subtle, and sometimes not so subtle, loss of quaility seems to be > inevitable. > I never use it now on files intended for distribution. > > Whilst modern scanners can produce excellent quality in terms of resolution > etc the two big problems I've observed with them, and with the scanning > techniques they seem to encourage, are the very large default file sizes > they tend to produce and the much reduced contrast, with the latter > usually > being much more of a nuisance. > > Both seem to be due to the way in which everything gets treated as colour > or greyscale and the only way I've found so far found of dealing with this > on completed PDFs is to extract all the pages as TIF files and process > them > individually for contrast enhancement etc, and superfluous color depth > reduction, in something like Photoshop or PaintShopPro. > > I've had some good results with this but you sure need one heck of a lot of > patience and spare time, so mostly these days I give thanks for large hard > drives and just try to live with it:-) > > regards > > Nigel > GM8PZR > ___ > 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] 3586A HQ PDF Manual available -optimization-
In a message dated 10/12/2010 16:17:29 GMT Standard Time, szeke...@gmail.com writes: why isn`t please, with respect to all working persones, the "DJVU-Formating " better as all experiments to reduce some from datavolume? Regularly it needs only ~10%-20% memory as pdf-files... - Djvu does generate much smaller files, and at one time I was promoting it just because of that, but that's about the only advantage it offers. It's a shame, because it did seem to promise great things to start with and looked as though it might become a viable alternative to Acrobat but it's never really progressed beyond those early beginnings and, in every other respect other than file size, Acrobat totally wipes the floor with it. Whoops, drifting even further off topic here, apologies for that and back to lurking:-) regards Nigel GM8PZR ___ 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] 3586A HQ PDF Manual available -optimization-
Because of DJVU's limited support and links to Russian malware/Warez sites. If I see a file with djvu encoding I drop it in the recycle bin without opening as a result of infosec day job. Scott Sent from my Verizon Wireless BlackBerry -Original Message- From: "K. Szeker" Sender: time-nuts-boun...@febo.com Date: Fri, 10 Dec 2010 17:16:51 To: Discussion of precise time and frequency measurement Reply-To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 3586A HQ PDF Manual available -optimization- Hi all, why isn`t please, with respect to all working persones, the "DJVU-Formating " better as all experiments to reduce some from datavolume? Regularly it needs only ~10%-20% memory as pdf-files... Best greetings! Karesz 2010/12/10 > > In a message dated 10/12/2010 10:19:08 GMT Standard Time, > rbarri...@msn.com > writes: > > I've downloaded the reduced-size PDF and, although not very obvious, there > is loss of quality. See the attached comparison and see how sharpness is > reduced on the optimized capture at the right side. My goal was to create > the highest possible quality manuals, using the big sharp scans found at > KO4BB website. I'd prefer to release them as good (and big) as possible so > that anyone who needs it can reduce the size (always at a cost). The > optimization can be done at any time but the lost bits are lost forever, > > > > - > I've also found that the Adobe optimisation option needs to be used with > care and subtle, and sometimes not so subtle, loss of quaility seems to be > inevitable. > I never use it now on files intended for distribution. > > Whilst modern scanners can produce excellent quality in terms of resolution > etc the two big problems I've observed with them, and with the scanning > techniques they seem to encourage, are the very large default file sizes > they tend to produce and the much reduced contrast, with the latter > usually > being much more of a nuisance. > > Both seem to be due to the way in which everything gets treated as colour > or greyscale and the only way I've found so far found of dealing with this > on completed PDFs is to extract all the pages as TIF files and process > them > individually for contrast enhancement etc, and superfluous color depth > reduction, in something like Photoshop or PaintShopPro. > > I've had some good results with this but you sure need one heck of a lot of > patience and spare time, so mostly these days I give thanks for large hard > drives and just try to live with it:-) > > regards > > Nigel > GM8PZR > ___ > 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] Got 60HZ?
FWIW... While any small micro can somehow get to 60Hz from 10MHz the Cypress PSoC has some unique features that might make it advantageous for certain applications. It has multiple programmable analog and digital blocks as well as a useful 8-bit micro. Here's what I'd consider for the job, all done for a few bucks in a single CY8C24x23 part: In a digital block, take the 10.00MHz input, divide it by 305 to get 32786.88... Hz and route to output pin. (Might need to use an analog block as a [self-adjusting?] DC bias output so the 10MHz source signal can be AC coupled.) Loop the 32786.88... Hz back to the "32768" crystal input, and use the internal clock PLL of 732x to get exactly 24.00 MHz. Use digital blocks to divide the 24MHz by 20 and then 2 to get an exact 60.000Hz square wave, locked to the 10MHz source. (One could use 24 and then 2 to get an exact 50.000Hz - the hard way!) There's still lots in even a minimal PSoC that isn't allocated and can definitely do something useful. For example take the 24MHz clock and run a software DDS on the micro, feed the DDS via a sine lookup table to an analog block DAC, bring that out and loop it through a (continuous time) analog block lowpass filter to derive a low distortion sine wave. Or tweak the lookup table and get any waveshape reasonable, like triangle or sawtooth. Sync the DDS to the 60Hz if need be, although it might marginally add to sine wave distortion / jitter. One chip and some passives, no crystal, 10MHz in, exactly 60Hz out, not the lowest jitter, but definitely precise. And with a little work get low a distortion sine, triangle or sawtooth output to boot. Regards, Bob L. p.s. No, I have no relationship with Cypress, I just like the PSoC family. Maybe because I'm an old analog guy at heart, and since small micros seem to rule the roost may as well pick one that leans the most in my favored direction. From: Bob Camp To: Discussion of precise time and frequency measurement Sent: Fri, December 10, 2010 7:32:03 AM Subject: Re: [time-nuts] Got 60HZ? Hi Easier to do with a cheap pic. If all you want is 60 Hz of of a 10 MHz source, load up one of the timers / PWM's. Change the load as required to hit 60 Hz. Might be <10 lines of code, certainly not over a couple dozen. 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. ___ 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] 3586A HQ PDF Manual available -optimization-
Hi PDF does have a lot of flaws. There have been a number of issues with it over the years. It is what pretty much everybody has already installed. It works on just about every platform out there. That includes things like editors. Modern versions are quite good at "what goes in is what comes out". Simply put - it's the default standard. DjVu is wonderful for file size, but tough to find a version of for odd platforms. Importing the file into your favorite editor, or exporting the edited result generally involves multi step translation. It's used so rarely that even for supported platforms, the first step will be - go get it and install it. It's got the same sort of security holes that Acrobat has had. It's not got the update empire to patch them. Simply put - it's a work in progress that may never be finished. The money in all this comes from people paying for editors and the like. That's a critical mass sort of thing. I don't see anybody displacing pdf any time soon. I'd love to see it happen, but the deck is stacked against it. For things that have archival value (like manuals) pdf is very much the way to go. The odds of being able to read a pdf 20 or 30 years from now are pretty good. The same is not true of less well known formats. To me that over-rides any of the better / worse / I can get around it stuff. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of K. Szeker Sent: Friday, December 10, 2010 11:17 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 3586A HQ PDF Manual available -optimization- Hi all, why isn`t please, with respect to all working persones, the "DJVU-Formating " better as all experiments to reduce some from datavolume? Regularly it needs only ~10%-20% memory as pdf-files... Best greetings! Karesz 2010/12/10 > > In a message dated 10/12/2010 10:19:08 GMT Standard Time, > rbarri...@msn.com > writes: > > I've downloaded the reduced-size PDF and, although not very obvious, there > is loss of quality. See the attached comparison and see how sharpness is > reduced on the optimized capture at the right side. My goal was to create > the highest possible quality manuals, using the big sharp scans found at > KO4BB website. I'd prefer to release them as good (and big) as possible so > that anyone who needs it can reduce the size (always at a cost). The > optimization can be done at any time but the lost bits are lost forever, > > > > - > I've also found that the Adobe optimisation option needs to be used with > care and subtle, and sometimes not so subtle, loss of quaility seems to be > inevitable. > I never use it now on files intended for distribution. > > Whilst modern scanners can produce excellent quality in terms of resolution > etc the two big problems I've observed with them, and with the scanning > techniques they seem to encourage, are the very large default file sizes > they tend to produce and the much reduced contrast, with the latter > usually > being much more of a nuisance. > > Both seem to be due to the way in which everything gets treated as colour > or greyscale and the only way I've found so far found of dealing with this > on completed PDFs is to extract all the pages as TIF files and process > them > individually for contrast enhancement etc, and superfluous color depth > reduction, in something like Photoshop or PaintShopPro. > > I've had some good results with this but you sure need one heck of a lot of > patience and spare time, so mostly these days I give thanks for large hard > drives and just try to live with it:-) > > regards > > Nigel > GM8PZR > ___ > 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] Got 60HZ?
Hi If you sit down and look at 60 Hz power, the phase jitter isn't all that low. You can easily see a few percent (!!). Since that's what we're trying to emulate here, coming up with perfection isn't really necessary. There are a number of parts in the sub 50 cent range that will do way more than you need to do here. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Robert LaJeunesse Sent: Friday, December 10, 2010 12:35 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Got 60HZ? FWIW... While any small micro can somehow get to 60Hz from 10MHz the Cypress PSoC has some unique features that might make it advantageous for certain applications. It has multiple programmable analog and digital blocks as well as a useful 8-bit micro. Here's what I'd consider for the job, all done for a few bucks in a single CY8C24x23 part: In a digital block, take the 10.00MHz input, divide it by 305 to get 32786.88... Hz and route to output pin. (Might need to use an analog block as a [self-adjusting?] DC bias output so the 10MHz source signal can be AC coupled.) Loop the 32786.88... Hz back to the "32768" crystal input, and use the internal clock PLL of 732x to get exactly 24.00 MHz. Use digital blocks to divide the 24MHz by 20 and then 2 to get an exact 60.000Hz square wave, locked to the 10MHz source. (One could use 24 and then 2 to get an exact 50.000Hz - the hard way!) There's still lots in even a minimal PSoC that isn't allocated and can definitely do something useful. For example take the 24MHz clock and run a software DDS on the micro, feed the DDS via a sine lookup table to an analog block DAC, bring that out and loop it through a (continuous time) analog block lowpass filter to derive a low distortion sine wave. Or tweak the lookup table and get any waveshape reasonable, like triangle or sawtooth. Sync the DDS to the 60Hz if need be, although it might marginally add to sine wave distortion / jitter. One chip and some passives, no crystal, 10MHz in, exactly 60Hz out, not the lowest jitter, but definitely precise. And with a little work get low a distortion sine, triangle or sawtooth output to boot. Regards, Bob L. p.s. No, I have no relationship with Cypress, I just like the PSoC family. Maybe because I'm an old analog guy at heart, and since small micros seem to rule the roost may as well pick one that leans the most in my favored direction. From: Bob Camp To: Discussion of precise time and frequency measurement Sent: Fri, December 10, 2010 7:32:03 AM Subject: Re: [time-nuts] Got 60HZ? Hi Easier to do with a cheap pic. If all you want is 60 Hz of of a 10 MHz source, load up one of the timers / PWM's. Change the load as required to hit 60 Hz. Might be <10 lines of code, certainly not over a couple dozen. 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. ___ 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] Got 60HZ?
It seems that we're all trying to find the most obstuse way to obtain 60Hz from 10MHz since the division is not integer... why not simply multiply the 10MHz input signal by 3 and feed the resulting 30MHz signal to any suitable divider by 50 chain? the result will be nice, spectrally pure and even 50.000% duty cycle :). A PLL multiplication solution could be to fed the 10MHz signal to any microcontroller that uses an internal PLL to obtain the internal clock (like an AT91SAM7S32, but there are a zillion of similar ones), get a 30, 45 or 60MHz internal clock, and obtain the 60Hz from a timer output. Single chip solution, and software needed only for register initialization (not so spectrally pure since the internal VCO of a microcontroller is not best class in the world) Regards, Javier El 10/12/2010 18:35, Robert LaJeunesse escribió: FWIW... While any small micro can somehow get to 60Hz from 10MHz the Cypress PSoC has some unique features that might make it advantageous for certain applications. It has multiple programmable analog and digital blocks as well as a useful 8-bit micro. Here's what I'd consider for the job, all done for a few bucks in a single CY8C24x23 part: In a digital block, take the 10.00MHz input, divide it by 305 to get 32786.88... Hz and route to output pin. (Might need to use an analog block as a [self-adjusting?] DC bias output so the 10MHz source signal can be AC coupled.) Loop the 32786.88... Hz back to the "32768" crystal input, and use the internal clock PLL of 732x to get exactly 24.00 MHz. Use digital blocks to divide the 24MHz by 20 and then 2 to get an exact 60.000Hz square wave, locked to the 10MHz source. (One could use 24 and then 2 to get an exact 50.000Hz - the hard way!) There's still lots in even a minimal PSoC that isn't allocated and can definitely do something useful. For example take the 24MHz clock and run a software DDS on the micro, feed the DDS via a sine lookup table to an analog block DAC, bring that out and loop it through a (continuous time) analog block lowpass filter to derive a low distortion sine wave. Or tweak the lookup table and get any waveshape reasonable, like triangle or sawtooth. Sync the DDS to the 60Hz if need be, although it might marginally add to sine wave distortion / jitter. One chip and some passives, no crystal, 10MHz in, exactly 60Hz out, not the lowest jitter, but definitely precise. And with a little work get low a distortion sine, triangle or sawtooth output to boot. Regards, Bob L. p.s. No, I have no relationship with Cypress, I just like the PSoC family. Maybe because I'm an old analog guy at heart, and since small micros seem to rule the roost may as well pick one that leans the most in my favored direction. From: Bob Camp To: Discussion of precise time and frequency measurement Sent: Fri, December 10, 2010 7:32:03 AM Subject: Re: [time-nuts] Got 60HZ? Hi Easier to do with a cheap pic. If all you want is 60 Hz of of a 10 MHz source, load up one of the timers / PWM's. Change the load as required to hit 60 Hz. Might be<10 lines of code, certainly not over a couple dozen. 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. ___ 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. -- Javier HerreroEMAIL: jherr...@hvsistemas.com Chief Technology Officer HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17 FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.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] Got 60HZ?
On Fri, Dec 10, 2010 at 4:32 AM, Bob Camp wrote: > Hi > > Easier to do with a cheap pic. > > If all you want is 60 Hz of of a 10 MHz source, load up one of the timers / > PWM's. Change the load as required to hit 60 Hz. I don't see how this is going to track the 10Mhz reference unless maybe you use it to clock the PIC. That would work if you had a PIC that would run on 10Mhz -- = 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] 3586A HQ PDF Manual available -optimization-
DJVU does work well but is quite uncommon. Every PC shipped these days seems to have adobe on it. On Fri, Dec 10, 2010 at 11:16 AM, K. Szeker wrote: > Hi all, > why isn`t please, with respect to all working persones, the "DJVU-Formating > " better as all experiments to reduce some from datavolume? Regularly it > needs only ~10%-20% memory as pdf-files... > Best greetings! > Karesz > > 2010/12/10 > > > > > In a message dated 10/12/2010 10:19:08 GMT Standard Time, > > rbarri...@msn.com > > writes: > > > > I've downloaded the reduced-size PDF and, although not very obvious, > there > > is loss of quality. See the attached comparison and see how sharpness > is > > reduced on the optimized capture at the right side. My goal was to > create > > the highest possible quality manuals, using the big sharp scans found at > > KO4BB website. I'd prefer to release them as good (and big) as possible > so > > that anyone who needs it can reduce the size (always at a cost). The > > optimization can be done at any time but the lost bits are lost forever, > > > > > > > > - > > I've also found that the Adobe optimisation option needs to be used with > > care and subtle, and sometimes not so subtle, loss of quaility seems to > be > > inevitable. > > I never use it now on files intended for distribution. > > > > Whilst modern scanners can produce excellent quality in terms of > resolution > > etc the two big problems I've observed with them, and with the scanning > > techniques they seem to encourage, are the very large default file sizes > > they tend to produce and the much reduced contrast, with the latter > > usually > > being much more of a nuisance. > > > > Both seem to be due to the way in which everything gets treated as colour > > or greyscale and the only way I've found so far found of dealing with > this > > on completed PDFs is to extract all the pages as TIF files and process > > them > > individually for contrast enhancement etc, and superfluous color depth > > reduction, in something like Photoshop or PaintShopPro. > > > > I've had some good results with this but you sure need one heck of a lot > of > > patience and spare time, so mostly these days I give thanks for large > hard > > drives and just try to live with it:-) > > > > regards > > > > Nigel > > GM8PZR > > ___ > > 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] 3586A HQ PDF Manual available -optimization-
DJVU is a wavelet decomposition scheme so as zoom in is done, the resolution stays the same. Quite different from adobe. Unfortunately for Lizardtech, DJVU never quite caught on. Don paul swed > DJVU does work well but is quite uncommon. > Every PC shipped these days seems to have adobe on it. > > On Fri, Dec 10, 2010 at 11:16 AM, K. Szeker wrote: > >> Hi all, >> why isn`t please, with respect to all working persones, the >> "DJVU-Formating >> " better as all experiments to reduce some from datavolume? Regularly it >> needs only ~10%-20% memory as pdf-files... >> Best greetings! >> Karesz >> >> 2010/12/10 >> >> > >> > In a message dated 10/12/2010 10:19:08 GMT Standard Time, >> > rbarri...@msn.com >> > writes: >> > >> > I've downloaded the reduced-size PDF and, although not very obvious, >> there >> > is loss of quality. See the attached comparison and see how sharpness >> is >> > reduced on the optimized capture at the right side. My goal was to >> create >> > the highest possible quality manuals, using the big sharp scans found >> at >> > KO4BB website. I'd prefer to release them as good (and big) as >> possible >> so >> > that anyone who needs it can reduce the size (always at a cost). The >> > optimization can be done at any time but the lost bits are lost >> forever, >> > >> > >> > >> > - >> > I've also found that the Adobe optimisation option needs to be used >> with >> > care and subtle, and sometimes not so subtle, loss of quaility seems >> to >> be >> > inevitable. >> > I never use it now on files intended for distribution. >> > >> > Whilst modern scanners can produce excellent quality in terms of >> resolution >> > etc the two big problems I've observed with them, and with the >> scanning >> > techniques they seem to encourage, are the very large default file >> sizes >> > they tend to produce and the much reduced contrast, with the latter >> > usually >> > being much more of a nuisance. >> > >> > Both seem to be due to the way in which everything gets treated as >> colour >> > or greyscale and the only way I've found so far found of dealing with >> this >> > on completed PDFs is to extract all the pages as TIF files and >> process >> > them >> > individually for contrast enhancement etc, and superfluous color depth >> > reduction, in something like Photoshop or PaintShopPro. >> > >> > I've had some good results with this but you sure need one heck of a >> lot >> of >> > patience and spare time, so mostly these days I give thanks for large >> hard >> > drives and just try to live with it:-) >> > >> > regards >> > >> > Nigel >> > GM8PZR >> > ___ >> > 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. > -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." R. Bacon Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 3586A HQ PDF Manual available -optimization-
The best thing you can do after you scan a manual is run it through OCR. If you have Acrobat then you have one of the best OCR systems around. This dramatically improves the readabilty and crispness of the text and at the same time makes the document much smaller and also it makes it searchable. It does require a bit of time because you have to check the quality of the OCR. But it mostly works well. I'm working on a Heatkit manual I have but is not yet available on-line. It will be OCR'd. -- = 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] 3586A HQ PDF Manual available -optimization-
Lizartech had a long legal dispute with ER Mapper concerning wavelets compression patents. Both companies suffered a money bleeding and finally both were sold, Lizardtech to a Japanese company and ER Mapper to Leica's ERDAS Inc. (now Hexagon Group). Ignacio, EB4APL El 10/12/2010 19:19, Don Latham wrote: DJVU is a wavelet decomposition scheme so as zoom in is done, the resolution stays the same. Quite different from adobe. Unfortunately for Lizardtech, DJVU never quite caught on. Don paul swed ___ 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] Got 60HZ?
Hi Yes indeed, use the 10 MHz as the clock to the PIC or any similar cheap CPU. The external clock input pin does a fine job (for this purpose) of taking in a sine wave. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Chris Albertson Sent: Friday, December 10, 2010 1:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Got 60HZ? On Fri, Dec 10, 2010 at 4:32 AM, Bob Camp wrote: > Hi > > Easier to do with a cheap pic. > > If all you want is 60 Hz of of a 10 MHz source, load up one of the timers / PWM's. Change the load as required to hit 60 Hz. I don't see how this is going to track the 10Mhz reference unless maybe you use it to clock the PIC. That would work if you had a PIC that would run on 10Mhz -- = 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] 3586A HQ Manuals READY
Hi, The manuals are ready. I have nothing against DjVu other than that PDF exists, but that's a pretty good enough reason I believe. The Operating manual has been revised so discard the old copy if you got it. The two volumes of the Service Manual are in a single PDF file. Yes it is big, but it allows for the cross references to work so the bookmarks can jump from one volume to another. Being the manuals so large, it is nice to jump back and forth so easily. Stitching the schematics was hard because no automated process I tried turned out successful, but they look great. It is amazing the job that the HP people had to do to write (and draw) such a manual so many years ago with no computers. My hosting is cheap but also limited, be patient if the downloads take long, I don't know how many of us will try to grab the manuals at the same time: http://www.rbarrios.com/manuals I hope Didier makes them available also on his site soon so we can balance loads ;-) Enjoy! Roberto EB4EQA ___ 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] Efratom 1 sec buffers
Hi. I passed by a reference to these buffer arrays on the list. (MFS with BFM and MDP modules). Did anyone else get one of these? I did, and they seem to be very interesting. The MDP 4-output buffer is very interesting indeed. The ISP connector is there to program the gate array, and the layout looks reasomably simple. I'm assuming the gate array is some kind of resyncing/reclocking system. I lost the location for the mod, but as I remember, one buffer was redone to be an input, and drives the other three. I'd like to play a little more with the modules as-is, so does anyone know what the "rf" input is frequency-wise? BTW, the pulse-forming circuitry on the modules looks suspiciously like the Efratom setup referred to on another list topic, including use of 74HCT14D buffers. If anyone has excess modules, I'd like to have some. Guess that's all for now, Merry Christmas... Don -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." R. Bacon "If you don't know what it is, don't poke it." Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." R. Bacon Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 3586A HQ PDF Manual available -optimization-
You obviously haven't come across all of the Adobe acrobat OCR'd manuals on logsa. They are amazingly unusable. The OCR program gets way off kilter, and makes a mess of large sections of the manuals... and unfortunately, nobody has the resources to proofread the results. Don't waste your time on the Heathkit manual. The license to reproduce the manuals was bought up by some little ham company, and they are very inclined to chase down any heathkit manuals on the internet, and serve the hosting site with a take down notice. The only thing you are "allowed" to put on the net is the schematic. -Chuck Harris Chris Albertson wrote: The best thing you can do after you scan a manual is run it through OCR. If you have Acrobat then you have one of the best OCR systems around. This dramatically improves the readabilty and crispness of the text and at the same time makes the document much smaller and also it makes it searchable. It does require a bit of time because you have to check the quality of the OCR. But it mostly works well. I'm working on a Heatkit manual I have but is not yet available on-line. It will be OCR'd. ___ 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] 3586A HQ PDF Manual - Alternate Repository
To distribute some of the (down)load I've dropped them at: http://www.n1oz.net/JustNuts/3586_Serv_Man_HQ.zip (232 MB) http://www.n1oz.net/JustNuts/3586_Oper_Man_HQ.zip (52 MB) These are copies pulled from Roberto's Site this morning. This isn't a long term archive, but should help meet some of the initial peak demand. I'll leave them up for a month or so, or until demand falls off. -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport) ___ 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] 3586A HQ PDF Manual available -optimization-
Ask Dave at ArtekMedia. His manuals have indices in the .pdfs. They might be automatically done, which implies OCR. FWIW, -John > You obviously haven't come across all of the Adobe acrobat OCR'd manuals > on logsa. They are amazingly unusable. The OCR program gets way off > kilter, and makes a mess of large sections of the manuals... and > unfortunately, > nobody has the resources to proofread the results. > > Don't waste your time on the Heathkit manual. The license to reproduce > the > manuals was bought up by some little ham company, and they are very > inclined > to chase down any heathkit manuals on the internet, and serve the hosting > site > with a take down notice. The only thing you are "allowed" to put on the > net is the > schematic. > > -Chuck Harris > > Chris Albertson wrote: >> The best thing you can do after you scan a manual is run it through OCR. >> If you have Acrobat then you have one of the best OCR systems around. >> This dramatically improves the readabilty and crispness of the text and >> at the same time makes the document much smaller and also it makes >> it searchable. It does require a bit of time because you have to >> check >> the quality of the OCR. But it mostly works well. I'm working on a >> Heatkit >> manual I have but is not yet available on-line. It will be OCR'd. >> >> > > ___ > 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] 3586A HQ PDF Manual available -optimization-
Chuck, Really ? Which little ham company is that ? BillWB6BNQ Chuck Harris wrote: > You obviously haven't come across all of the Adobe acrobat OCR'd manuals > on logsa. They are amazingly unusable. The OCR program gets way off > kilter, and makes a mess of large sections of the manuals... and > unfortunately, > nobody has the resources to proofread the results. > > Don't waste your time on the Heathkit manual. The license to reproduce the > manuals was bought up by some little ham company, and they are very inclined > to chase down any heathkit manuals on the internet, and serve the hosting site > with a take down notice. The only thing you are "allowed" to put on the net > is the > schematic. > > -Chuck Harris > > Chris Albertson wrote: > > The best thing you can do after you scan a manual is run it through OCR. > > If you have Acrobat then you have one of the best OCR systems around. > > This dramatically improves the readabilty and crispness of the text and > > at the same time makes the document much smaller and also it makes > > it searchable. It does require a bit of time because you have to check > > the quality of the OCR. But it mostly works well. I'm working on a Heatkit > > manual I have but is not yet available on-line. It will be OCR'd. > > > > > > ___ > 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] 3586A HQ PDF Manual available -optimization-
I was a long thread on the Boatanchors, ArmyRadios, or Milsurplus list. Probably on the Heathkit list also. -John == > Chuck, > > Really ? Which little ham company is that ? > > BillWB6BNQ > > Chuck Harris wrote: > >> You obviously haven't come across all of the Adobe acrobat OCR'd manuals >> on logsa. They are amazingly unusable. The OCR program gets way off >> kilter, and makes a mess of large sections of the manuals... and >> unfortunately, >> nobody has the resources to proofread the results. >> >> Don't waste your time on the Heathkit manual. The license to reproduce >> the >> manuals was bought up by some little ham company, and they are very >> inclined >> to chase down any heathkit manuals on the internet, and serve the >> hosting site >> with a take down notice. The only thing you are "allowed" to put on the >> net is the >> schematic. >> >> -Chuck Harris >> >> Chris Albertson wrote: >> > The best thing you can do after you scan a manual is run it through >> OCR. >> > If you have Acrobat then you have one of the best OCR systems around. >> > This dramatically improves the readabilty and crispness of the text >> and >> > at the same time makes the document much smaller and also it makes >> > it searchable. It does require a bit of time because you have to >> check >> > the quality of the OCR. But it mostly works well. I'm working on a >> Heatkit >> > manual I have but is not yet available on-line. It will be OCR'd. >> > >> > >> >> ___ >> 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] 3586A HQ PDF Manual available -optimization-
Press Release October 2008 Data Professionals of Pleasanton California has purchased the Copyrights and existing inventory of all legacy Heathkit product documentation from Heath Company of Benton Harbor Michigan for an undisclosed amount. The new company will make copies of the original legacy manuals available to the marketplace via its web site and through eBay and PayPal. -Chuck Harris WB6BNQ wrote: Chuck, Really ? Which little ham company is that ? BillWB6BNQ Chuck Harris wrote: You obviously haven't come across all of the Adobe acrobat OCR'd manuals on logsa. They are amazingly unusable. The OCR program gets way off kilter, and makes a mess of large sections of the manuals... and unfortunately, nobody has the resources to proofread the results. Don't waste your time on the Heathkit manual. The license to reproduce the manuals was bought up by some little ham company, and they are very inclined to chase down any heathkit manuals on the internet, and serve the hosting site with a take down notice. The only thing you are "allowed" to put on the net is the schematic. -Chuck Harris Chris Albertson wrote: The best thing you can do after you scan a manual is run it through OCR. If you have Acrobat then you have one of the best OCR systems around. This dramatically improves the readabilty and crispness of the text and at the same time makes the document much smaller and also it makes it searchable. It does require a bit of time because you have to check the quality of the OCR. But it mostly works well. I'm working on a Heatkit manual I have but is not yet available on-line. It will be OCR'd. ___ 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] Software defined spectrum analyzer
I found this device on the net. It seems quite capable for the price. Does anyone have experience with it, or the previous version? http://www.signalhound.com/ Geraldo gera...@decampos.net ___ 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] 3586A HQ PDF Manual available -optimization-
There was a lot of discussion about whether the company actually bought the rights and/or whether the seller, in fact, owned the rights, , or just some filing cabinets of hard copy manuals. FWIW, -John > Press Release > > October 2008 > > Data Professionals of Pleasanton California has purchased the Copyrights > and existing inventory of all legacy Heathkit > product documentation from Heath Company of Benton Harbor Michigan for an > undisclosed amount. The new company will make > copies of the original legacy manuals available to the marketplace via its > web site and through eBay and PayPal. > > -Chuck Harris > > WB6BNQ wrote: >> Chuck, >> >> Really ? Which little ham company is that ? >> >> BillWB6BNQ >> >> Chuck Harris wrote: >> >>> You obviously haven't come across all of the Adobe acrobat OCR'd >>> manuals >>> on logsa. They are amazingly unusable. The OCR program gets way off >>> kilter, and makes a mess of large sections of the manuals... and >>> unfortunately, >>> nobody has the resources to proofread the results. >>> >>> Don't waste your time on the Heathkit manual. The license to reproduce >>> the >>> manuals was bought up by some little ham company, and they are very >>> inclined >>> to chase down any heathkit manuals on the internet, and serve the >>> hosting site >>> with a take down notice. The only thing you are "allowed" to put on >>> the net is the >>> schematic. >>> >>> -Chuck Harris >>> >>> Chris Albertson wrote: The best thing you can do after you scan a manual is run it through OCR. If you have Acrobat then you have one of the best OCR systems around. This dramatically improves the readabilty and crispness of the text and at the same time makes the document much smaller and also it makes it searchable. It does require a bit of time because you have to check the quality of the OCR. But it mostly works well. I'm working on a Heatkit manual I have but is not yet available on-line. It will be OCR'd. >>> >>> ___ >>> 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] Software defined spectrum analyzer
I have one of the original analyzers, and I'm quite satisfied with it. Note that there is a set of drivers so that the device can be used as, say an SDR. There's also a nice USB power meter available from Mini-Circuits for about $700, although I do not have one. Don - Original Message - From: "Geraldo Lino de Campos" To: Sent: Friday, December 10, 2010 6:13 PM Subject: [time-nuts] Software defined spectrum analyzer I found this device on the net. It seems quite capable for the price. Does anyone have experience with it, or the previous version? http://www.signalhound.com/ Geraldo gera...@decampos.net ___ 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] 3586A HQ PDF Manual available
Roberto I downloaded the 3586 manual and looked at the large schematics. Really well done and very readable when expanded. Thank you for sharing with everyone. Regards Paul WB8TSL On Thu, Dec 9, 2010 at 5:58 PM, Alberto di Bene wrote: > On 12/9/2010 11:18 PM, Roberto Barrios wrote: > > Luckily I've been able to invest a few unexpected evenings on the manual > and > all the long boring work is already done. I'm now reviewing it thoroughly > as > I'd like to avoid having to fix silly mistakes after people have already > downloaded it (something which is plainly unavoidable, I'm just trying to > minimize the embarrasment...) > > It is a matter of hours, you'll get it for the weekend :-) > > Thanks for the interest ! > Roberto EB4EQA > >I have been able to reduce considerably the size of that PDF by using > the optimizing function of Adobe Acrobat, without loss of quality. > The optimized copy is here : > [1]http://dl.dropbox.com/u/15089947/3586%20-%20Operating%20Manual%20%28 > HQ_opt%29.pdf > Now it is 61,227 kB instead of the original 116,380 kB > If you will publish an amended copy, I will process that as well. > 73 Alberto I2PHD > > References > > 1. > http://dl.dropbox.com/u/15089947/3586%20-%20Operating%20Manual%20%28HQ_opt%29.pdf > ___ > 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] Got 60HZ?
I'm sure everyone remembers the little 8 pin chip that derived 60 Hz from a standard NTSC color burst crystal. As I recall there was a companion chip that would derive 60 Hz from a 5MHz crystal. I have no idea if it is still available. Regards. Max. K 4 O D S. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com - Original Message - From: "Chris Albertson" To: "Discussion of precise time and frequency measurement" Sent: Friday, December 10, 2010 12:53 AM Subject: Re: [time-nuts] Got 60HZ? On Thu, Dec 9, 2010 at 4:19 PM, Michael Poulos wrote: The chip number is a C8051T602.It's actually a tiny printed circuit card in a DIP chip pinout format. Anyone know of a microcontroller that'll take the raw sinewave from a Ru movement? The C8051T602 is a micro controller. 8051 is a very common part. If it did a divide by ten function it was because it was loaded with software. -- = 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] Got 60HZ?
Ah yes the 5369 chip. John WA4WDL -- From: "Max Robinson" Sent: Friday, December 10, 2010 10:02 PM To: "Discussion of precise time and frequency measurement" Subject: Re: [time-nuts] Got 60HZ? I'm sure everyone remembers the little 8 pin chip that derived 60 Hz from a standard NTSC color burst crystal. As I recall there was a companion chip that would derive 60 Hz from a 5MHz crystal. I have no idea if it is still available. Regards. Max. K 4 O D S. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com - Original Message - From: "Chris Albertson" To: "Discussion of precise time and frequency measurement" Sent: Friday, December 10, 2010 12:53 AM Subject: Re: [time-nuts] Got 60HZ? On Thu, Dec 9, 2010 at 4:19 PM, Michael Poulos wrote: The chip number is a C8051T602.It's actually a tiny printed circuit card in a DIP chip pinout format. Anyone know of a microcontroller that'll take the raw sinewave from a Ru movement? The C8051T602 is a micro controller. 8051 is a very common part. If it did a divide by ten function it was because it was loaded with software. -- = 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] Software defined spectrum analyzer
It's neat -- not a substitute for the big HP iron, but still a very capable tool. The first few they sold were less expensive, but I think it's still a nice piece of gear for $1K. Good bang:buck ratio. -- john, KE5FX > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on > Behalf Of Geraldo Lino de Campos > Sent: Friday, December 10, 2010 5:14 PM > To: time-nuts@febo.com > Subject: [time-nuts] Software defined spectrum analyzer > > > I found this device on the net. It seems quite capable for the price. Does > anyone have experience with it, or the previous version? > > http://www.signalhound.com/ > > Geraldo > > gera...@decampos.net > ___ > 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] 85630A Manual Available
I have a freshly scanned in manual for the HP 85630A Scalar Transmission/Reflection Test Set. It's a raw PDF, 10.6 MB in size. The 85630A when used with an 859X series spectrum analyzer with tracking generator (option 010) and the 85714A scalar measurements personality card lets you make transmission and reflection measurements from 300 KHz - 2.9 GHz. If you're interested in a copy of the manual, let me know and I'll e-mail it to you. Oh, while Santa and the elves found the 85630A and its manual for me, they haven't had any luck finding the 85714A personality card. Any assistance, or listings of the code (if they exist) would be appreciated. 73 bob k6rtm ___ 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] Got 60HZ?
Javier Herrero wrote: It seems that we're all trying to find the most obstuse way to obtain 60Hz from 10MHz since the division is not integer... why not simply multiply the 10MHz input signal by 3 and feed the resulting 30MHz signal to any suitable divider by 50 chain? the result will be nice, spectrally pure and even 50.000% duty cycle :). To multiply the frequency means weird RF circuitry to start off. If you start off with the 10 million HZ and divide, you only get better as any phase jitter gets lost in the division. As you divide far enough, the phase jitter gets to those "leap pulse" jitters. To design around the problem of Rb (my bad about Rb versus Ru) movements you have to have a second one ready to start once the original goes bad. This will occur with a cesium movement, like a good Agilent 5071A cesium movement every bit as well A fun question is why Rb movements are so common but Cs movements are rare and expensive. ___ 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.
