Re: [time-nuts] suggestions on getting 24 Mhz ?
Thanks Tim. All the best Mark Spencer m...@alignedsolutions.com 604 762 4099 > On May 9, 2018, at 5:38 PM, Tim Tuck wrote: > > Hi Mark, > > this is a product of Glen VK1XX. > he will have a website with eCommerce up soon and when that happens I will > announce it to the list > Regards > Tim > >> On Wed, 9 May 2018 at 10:43, Mark Spencer wrote: >> >> Hi would anyone be able to point me (off list) in the direction of a bit >> more information re this device ? >> >> Many thanks >> >> Mark S >> >> m...@alignedsolutions.com >> 604 762 4099 >> >>> On May 8, 2018, at 12:15 AM, Tim Tuck wrote: >>> >>> Hi Pete, >>> >>> You probably want this... >>> >>> https://github.com/glenenglishgithub/anylockerFS >>> >>> >>> Lots of VK's are lining up for the first run of boards to lock their >> radios. >>> >>> regards >>> >>> Tim >>> On 11/04/2018 8:00 PM, Pete Lancashire wrote: Needed for SDR project as external clock source. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. >>> >>> >>> --- >>> This email has been checked for viruses by Avast antivirus software. >>> https://www.avast.com/antivirus >>> >>> ___ >>> 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. > -- > > -- > > VK2XAX :: QF56if23 :: BMARC :: WIA :: AMSATVK > ___ > 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] suggestions on getting 24 Mhz ?
Hi Mark, this is a product of Glen VK1XX. he will have a website with eCommerce up soon and when that happens I will announce it to the list Regards Tim On Wed, 9 May 2018 at 10:43, Mark Spencer wrote: > Hi would anyone be able to point me (off list) in the direction of a bit > more information re this device ? > > Many thanks > > Mark S > > m...@alignedsolutions.com > 604 762 4099 > > > On May 8, 2018, at 12:15 AM, Tim Tuck wrote: > > > > Hi Pete, > > > > You probably want this... > > > > https://github.com/glenenglishgithub/anylockerFS > > > > > > Lots of VK's are lining up for the first run of boards to lock their > radios. > > > > regards > > > > Tim > > > >> On 11/04/2018 8:00 PM, Pete Lancashire wrote: > >> Needed for SDR project as external clock source. > >> > >> -pete > >> ___ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > > > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > ___ > > 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. > -- -- VK2XAX :: QF56if23 :: BMARC :: WIA :: AMSATVK ___ 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] suggestions on getting 24 Mhz ?
Hi would anyone be able to point me (off list) in the direction of a bit more information re this device ? Many thanks Mark S m...@alignedsolutions.com 604 762 4099 > On May 8, 2018, at 12:15 AM, Tim Tuck wrote: > > Hi Pete, > > You probably want this... > > https://github.com/glenenglishgithub/anylockerFS > > > Lots of VK's are lining up for the first run of boards to lock their radios. > > regards > > Tim > >> On 11/04/2018 8:00 PM, Pete Lancashire wrote: >> Needed for SDR project as external clock source. >> >> -pete >> ___ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > ___ > 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] suggestions on getting 24 Mhz ?
Hi Pete, You probably want this... https://github.com/glenenglishgithub/anylockerFS Lots of VK's are lining up for the first run of boards to lock their radios. regards Tim On 11/04/2018 8:00 PM, Pete Lancashire wrote: Needed for SDR project as external clock source. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ 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] suggestions on getting 24 Mhz ?
14 bit On Mon, Apr 16, 2018, 8:00 AM jimlux wrote: > On 4/16/18 3:45 AM, Pete Lancashire wrote: > > Access to " the xtal" is not an option the SDR is enclosed in a metal > box. > > > > Do a web search for RSP2Pro > > > > > > It does have an external reference input.. > There's not a lot of info on the Mirics data sheets (or on the sdrplay > website) > > It sort of looks like this is a somewhat enhanced version of the parts > used in the RTL-SDR dongles. > (10 bit ADC, instead of 8 bits in the RTL2832) > > And of course it needs 24MHz because it has to run the USB interface. > > 10 bit ADC means that you probably don't need *outstanding* clock > performance - the sample and hold and all the other timing logic is > probably designed to that sort of performance level - getting > femtosecond jitter probably isn't worth it. > > > If you're just looking for a 24 MHz driver that doesn't need to be > locked to anything, one of the SiTime modules would work, or you could > probably order a TCXO for 24 MHz - it's a standard frequency (viz. USB), > so it's almost certainly available from stock > > > > > On Sun, Apr 15, 2018, 6:00 AM Attila Kinali wrote: > > > >> On Wed, 11 Apr 2018 03:00:23 -0700 > >> Pete Lancashire wrote: > >> > >>> Needed for SDR project as external clock source. > >> > >> If your goal is, as Jim guessed, to get 24MHz from 10MHz and > >> you are using something like an RTL-SDR, then how about just > >> passing the 10MHz through a CMOS gate to square it up and > >> get nice harmonics, then pass a wire close to the crystal. > >> This should injection lock the crystal to right frequency. > >> It wont be a strong lock due to the 5:12 ratio, but for something > >> like a crystal that is already quite close, that should do the trick. > >> > >> Alternatively, using an ADF4002 with a small uC to configure it > >> and a VCXO/VCO should also work. > >> > >> Attila Kinali > >> -- > >> The bad part of Zurich is where the degenerates > >> throw DARK chocolate at you. > >> ___ > >> 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] suggestions on getting 24 Mhz ?
On 4/16/18 3:45 AM, Pete Lancashire wrote: Access to " the xtal" is not an option the SDR is enclosed in a metal box. Do a web search for RSP2Pro It does have an external reference input.. There's not a lot of info on the Mirics data sheets (or on the sdrplay website) It sort of looks like this is a somewhat enhanced version of the parts used in the RTL-SDR dongles. (10 bit ADC, instead of 8 bits in the RTL2832) And of course it needs 24MHz because it has to run the USB interface. 10 bit ADC means that you probably don't need *outstanding* clock performance - the sample and hold and all the other timing logic is probably designed to that sort of performance level - getting femtosecond jitter probably isn't worth it. If you're just looking for a 24 MHz driver that doesn't need to be locked to anything, one of the SiTime modules would work, or you could probably order a TCXO for 24 MHz - it's a standard frequency (viz. USB), so it's almost certainly available from stock On Sun, Apr 15, 2018, 6:00 AM Attila Kinali wrote: On Wed, 11 Apr 2018 03:00:23 -0700 Pete Lancashire wrote: Needed for SDR project as external clock source. If your goal is, as Jim guessed, to get 24MHz from 10MHz and you are using something like an RTL-SDR, then how about just passing the 10MHz through a CMOS gate to square it up and get nice harmonics, then pass a wire close to the crystal. This should injection lock the crystal to right frequency. It wont be a strong lock due to the 5:12 ratio, but for something like a crystal that is already quite close, that should do the trick. Alternatively, using an ADF4002 with a small uC to configure it and a VCXO/VCO should also work. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ 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] suggestions on getting 24 Mhz ?
Access to " the xtal" is not an option the SDR is enclosed in a metal box. Do a web search for RSP2Pro On Sun, Apr 15, 2018, 6:00 AM Attila Kinali wrote: > On Wed, 11 Apr 2018 03:00:23 -0700 > Pete Lancashire wrote: > > > Needed for SDR project as external clock source. > > If your goal is, as Jim guessed, to get 24MHz from 10MHz and > you are using something like an RTL-SDR, then how about just > passing the 10MHz through a CMOS gate to square it up and > get nice harmonics, then pass a wire close to the crystal. > This should injection lock the crystal to right frequency. > It wont be a strong lock due to the 5:12 ratio, but for something > like a crystal that is already quite close, that should do the trick. > > Alternatively, using an ADF4002 with a small uC to configure it > and a VCXO/VCO should also work. > > Attila Kinali > -- > The bad part of Zurich is where the degenerates > throw DARK chocolate at you. > ___ > 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] suggestions on getting 24 Mhz ?
On Wed, 11 Apr 2018 03:00:23 -0700 Pete Lancashire wrote: > Needed for SDR project as external clock source. If your goal is, as Jim guessed, to get 24MHz from 10MHz and you are using something like an RTL-SDR, then how about just passing the 10MHz through a CMOS gate to square it up and get nice harmonics, then pass a wire close to the crystal. This should injection lock the crystal to right frequency. It wont be a strong lock due to the 5:12 ratio, but for something like a crystal that is already quite close, that should do the trick. Alternatively, using an ADF4002 with a small uC to configure it and a VCXO/VCO should also work. Attila Kinali -- The bad part of Zurich is where the degenerates throw DARK chocolate at you. ___ 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] Suggestions on getting 24 MHz?
Esteemed List Members, I have four new Midland glass encased 3.00 MHz HC 6 case style available. Each one was given a S/N and were ordered for Hallicrafters circa. Ovenized they would be excellent although I don't now what oven temp was specified. Best guess is 85 C. I can send world wide. If interested please send and email directly to me at sandeenpa at yahoo dot com (Please do not reply on the list.) Regards, Perrier ___ 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] suggestions on getting 24 Mhz ?
Pete, Is your goal to make SDR frequency measurements? One solution: grab any 24 MHz oscillator you find but use a counter with known accurate timebase (Rb,Cs,GPSDO) to continuously record its actual frequency. Don't adjust the frequency; just record it. Then, apply those readings as corrections to your SDR measurements. This software (or pencil & paper) correction method should give equivalent results as an atomic- or GPS-disciplined 24 MHz timebase. /tvb - Original Message - From: "Pete Lancashire" To: "Discussion of precise time and frequency measurement" Sent: Wednesday, April 11, 2018 3:00 AM Subject: [time-nuts] suggestions on getting 24 Mhz ? > Needed for SDR project as external clock source. > > -pete > ___ > 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] suggestions on getting 24 Mhz ?
On Wed, Apr 11, 2018 at 11:15 AM, Bob kb8tq wrote: > Hi > > > On Apr 11, 2018, at 12:11 PM, Graham / KE9H > wrote: > > > > Phase noise is (usually) more important than absolute frequency accuracy. > > It’s probably well worth looking into exactly what you are after in terms > of phase noise, > spurs, and stability *before* deciding on a solution. In some cases things > like DDS spurs > are a non-issue. In other cases phase noise at certain offsets is a really > big deal, but at > other offsets … it’s a non-issue. > > I am using the single output Bodnar GPSDO driving a frequency locked Wenzel low phase noise oscillator and using that for my SDR ADC clock. I am using it to take phase noise measurements and it certainly is as good as the references I have available, and matches pretty well with measurements on a $90k phase noise meter. The Wenzel eliminates far out spurs from the GPSDO. Note that different register values may result in the same frequency output of the GPSDO, but spurs can be very different. For some frequencies and with the right register values, I expect the GPSDO alone may be good enough for an SDR clock, but I have not tried. This is the best I can measure with this setup. I think the ADC noise limits the far out phase noise. Offset Phase Noise (Hz) (dBc/Hz) 10 -96.9 20 -103.0 50 -106.9 100 -109.7 200 -117.7 500 -128.4 1,000 -136.4 2,000 -140.1 5,000 -143.1 10,000-144.9 20,000-145.6 50,000-145.7 100,000 -146.2 1,000,000 -146.6 Regards, Mark W7MLG ___ 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] suggestions on getting 24 Mhz ?
Hi > On Apr 11, 2018, at 12:11 PM, Graham / KE9H wrote: > > Phase noise is (usually) more important than absolute frequency accuracy. It’s probably well worth looking into exactly what you are after in terms of phase noise, spurs, and stability *before* deciding on a solution. In some cases things like DDS spurs are a non-issue. In other cases phase noise at certain offsets is a really big deal, but at other offsets … it’s a non-issue. Bob > > I suggest some kind of low phase noise master oscillator (OCXO) feeding a > DDS without an internal multiplier. > > If internal multiplier in DDS, that, rather than the frequency reference > source will set the phase noise floor of the sampling. > > --- Graham > > == > > On Wed, Apr 11, 2018 at 11:00 AM, Jerry Hancock wrote: > >> For and RSP? I used an HP 3325 locked to my Cs beam and took the signal >> from the back. I think I paid no more than $100 for the 3325a and one I >> got for free. >> >> Regards, >> >> Jerry >> >> >>> On Apr 11, 2018, at 4:49 AM, jster...@att.net wrote: >>> >>> Leo Bodnar GPSDO - adjustable Low-jitter GPS-locked precision frequency >> reference 400 Hz to 810 MHz . He has a new one, single output for 99 >> british pounds. >>> >>> Jerry NY2KW >>> >>> -Original Message- >>> From: time-nuts On Behalf Of Pete >> Lancashire >>> Sent: Wednesday, April 11, 2018 6:00 AM >>> To: Discussion of precise time and frequency measurement < >> time-nuts@febo.com> >>> Subject: [time-nuts] suggestions on getting 24 Mhz ? >>> >>> Needed for SDR project as external clock source. >>> >>> -pete >>> ___ >>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> >>> --- >>> This email has been checked for viruses by Avast antivirus software. >>> https://www.avast.com/antivirus >>> >>> ___ >>> 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] suggestions on getting 24 Mhz ?
Phase noise is (usually) more important than absolute frequency accuracy. I suggest some kind of low phase noise master oscillator (OCXO) feeding a DDS without an internal multiplier. If internal multiplier in DDS, that, rather than the frequency reference source will set the phase noise floor of the sampling. --- Graham == On Wed, Apr 11, 2018 at 11:00 AM, Jerry Hancock wrote: > For and RSP? I used an HP 3325 locked to my Cs beam and took the signal > from the back. I think I paid no more than $100 for the 3325a and one I > got for free. > > Regards, > > Jerry > > > > On Apr 11, 2018, at 4:49 AM, jster...@att.net wrote: > > > > Leo Bodnar GPSDO - adjustable Low-jitter GPS-locked precision frequency > reference 400 Hz to 810 MHz . He has a new one, single output for 99 > british pounds. > > > > Jerry NY2KW > > > > -Original Message- > > From: time-nuts On Behalf Of Pete > Lancashire > > Sent: Wednesday, April 11, 2018 6:00 AM > > To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > > Subject: [time-nuts] suggestions on getting 24 Mhz ? > > > > Needed for SDR project as external clock source. > > > > -pete > > ___ > > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > ___ > > 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] suggestions on getting 24 Mhz ?
Yea, was also thinking of grabbing one of my 3325B's and hiding it under the desk :-) Going to see on Ebay if there are any 24 MHz VXCO's -pete On Wed, Apr 11, 2018 at 9:00 AM, Jerry Hancock wrote: > For and RSP? I used an HP 3325 locked to my Cs beam and took the signal > from the back. I think I paid no more than $100 for the 3325a and one I > got for free. > > Regards, > > Jerry > > > > On Apr 11, 2018, at 4:49 AM, jster...@att.net wrote: > > > > Leo Bodnar GPSDO - adjustable Low-jitter GPS-locked precision frequency > reference 400 Hz to 810 MHz . He has a new one, single output for 99 > british pounds. > > > > Jerry NY2KW > > > > -Original Message- > > From: time-nuts On Behalf Of Pete > Lancashire > > Sent: Wednesday, April 11, 2018 6:00 AM > > To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > > Subject: [time-nuts] suggestions on getting 24 Mhz ? > > > > Needed for SDR project as external clock source. > > > > -pete > > ___ > > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > ___ > > 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] suggestions on getting 24 Mhz ?
For and RSP? I used an HP 3325 locked to my Cs beam and took the signal from the back. I think I paid no more than $100 for the 3325a and one I got for free. Regards, Jerry > On Apr 11, 2018, at 4:49 AM, jster...@att.net wrote: > > Leo Bodnar GPSDO - adjustable Low-jitter GPS-locked precision frequency > reference 400 Hz to 810 MHz . He has a new one, single output for 99 british > pounds. > > Jerry NY2KW > > -Original Message- > From: time-nuts On Behalf Of Pete Lancashire > Sent: Wednesday, April 11, 2018 6:00 AM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] suggestions on getting 24 Mhz ? > > Needed for SDR project as external clock source. > > -pete > ___ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > ___ > 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] suggestions on getting 24 Mhz ?
Hi Pete, Speaking from limited experience, I wonder if a garden variety OCXO at say 10 MHz + some CMOS logic to act as a frequency multiplier might not fit the build? Then again, perhaps 24MHz is a little fast for the logic chips.. not sure. Hope this helps spark some discussion. Jim… N5SPE > On Apr 11, 2018, at 5:00 AM, Pete Lancashire wrote: > > Needed for SDR project as external clock source. > > -pete > ___ > 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] suggestions on getting 24 Mhz ?
On 4/11/18 3:00 AM, Pete Lancashire wrote: Needed for SDR project as external clock source. -pete I assume you mean derived from a high quality 10 MHz. some sort of discrete divide multiply? divide by 5 multiply by 12? A PLL with VCXO with good far out noise? (sort of like "clean up loops" used for distributing 10 or 100 MHz ) A DDS (with internal multiplier) ___ 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] suggestions on getting 24 Mhz ?
Leo Bodnar GPSDO - adjustable Low-jitter GPS-locked precision frequency reference 400 Hz to 810 MHz . He has a new one, single output for 99 british pounds. Jerry NY2KW -Original Message- From: time-nuts On Behalf Of Pete Lancashire Sent: Wednesday, April 11, 2018 6:00 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] suggestions on getting 24 Mhz ? Needed for SDR project as external clock source. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ 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] suggestions on getting 24 Mhz ?
Needed for SDR project as external clock source. -pete ___ 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.
