Re: [time-nuts] crystal oscillators & TPLL
I imagine that there are people on this list like myself with limited engineering experience
but a healthy appetite for knowledge and an interest in time/frequency measurement.
I have little interest in complex math - an inherent brain block methinks, but enjoy
building hardware and incorporating such 'blocks' into my projects.
I am not necessarily unintelligent - being a Consultant Anaesthetist with 3 degrees,
2 diplomas and currently doing a Masters.
My interest in this list comes form having a HP106, 2 rubidium standards and 2 z3801a
gps units.
Why am I posting on this thread? - simple - I wish to build this beastie described by
Warren and try it out on my equipment. I need more guidance than a block diagram.
Shame on me for being so ignorant but I respectfully request more info (circuit diagram)
emailed privately if necessary.
I am not here to criticise, but enjoy reading the discussions of people so knowledgeable
in this area. I have my own areas of expertise.
Thanks for reading.
Steve,
It's for people like you that makes this whole thing worthwhile. Keep
hanging on the line and I'm certain something will transpire.
Best regards,
Steve
On 27 June 2010 01:24, Steve Roberts steve@borisone.demon.co.uk wrote:
I imagine that there are people on this list like myself with limited engineering experience
but a healthy appetite for knowledge and an interest in time/frequency measurement.
I have little interest in complex math - an inherent brain block methinks, but enjoy
building hardware and incorporating such 'blocks' into my projects.
I am not necessarily unintelligent - being a Consultant Anaesthetist with 3 degrees,
2 diplomas and currently doing a Masters.
My interest in this list comes form having a HP106, 2 rubidium standards and 2 z3801a
gps units.
Why am I posting on this thread? - simple - I wish to build this beastie described by
Warren and try it out on my equipment. I need more guidance than a block diagram.
Shame on me for being so ignorant but I respectfully request more info (circuit diagram)
emailed privately if necessary.
I am not here to criticise, but enjoy reading the discussions of people so knowledgeable
in this area. I have my own areas of expertise.
Thanks for reading.
Steve
steve@borisone.demon.co.uk
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
--
Steve Rooke - ZL3TUV & G8KVD
The only reason for time is so that everything doesn't happen at once.
- Einstein
I'm quite sure someone has went down this road...
so I better ask first.
Phase noise wise what would be the best OCXO's that
we could find around, taken from equipments, or ebay
etc.
I have in mind essentially the HP ones. the PIEZZO
ISOTEMP, CMAK, Vecton(harder to find) and some of the small
wenzels, BLIBEY, OACs and a few more.
Not necessarily just 10MHz... other freqs
are of interest too.
Any generic heading info/help?
Many Thanks.
Luis Cupido.
ct1dmk.
Wenzel ULN-grade parts and Valpey-Fisher's VFOV110 line come to mind.
There's also a vendor in the UK whose name escapes me who has been
advertising ULN-class OCXOs lately (I think someone from there is actually
on the list.)
The term "ultra low noise" is common in the XO business, but only a few
vendors are serious about competing in that sector.
-- john, KE5FX
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of Luis Cupido
Sent: Monday, June 28, 2010 7:02 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Best OCXOs, phasenoise wise.
I'm quite sure someone has went down this road...
so I better ask first.
Phase noise wise what would be the best OCXO's that
we could find around, taken from equipments, or ebay
etc.
I have in mind essentially the HP ones. the PIEZZO
ISOTEMP, CMAK, Vecton(harder to find) and some of the small
wenzels, BLIBEY, OACs and a few more.
Not necessarily just 10MHz... other freqs
are of interest too.
Any generic heading info/help?
Many Thanks.
Luis Cupido.
ct1dmk.
www.pascall.co.uk was the other company I was thinking of.
-- john, KE5FX
-----Original Message-----
From: John Miles [mailto:jmiles@pop.net]
Sent: Monday, June 28, 2010 7:33 AM
To: Discussion of precise time and frequency measurement
Subject: RE: [time-nuts] Best OCXOs, phasenoise wise.
Wenzel ULN-grade parts and Valpey-Fisher's VFOV110 line come to
mind. There's also a vendor in the UK whose name escapes me who
has been advertising ULN-class OCXOs lately (I think someone from
there is actually on the list.)
The term "ultra low noise" is common in the XO business, but only
a few vendors are serious about competing in that sector.
-- john, KE5FX
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of Luis Cupido
Sent: Monday, June 28, 2010 7:02 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Best OCXOs, phasenoise wise.
I'm quite sure someone has went down this road...
so I better ask first.
Phase noise wise what would be the best OCXO's that
we could find around, taken from equipments, or ebay
etc.
And the price will make your eyes water!!
Dave P.
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of John Miles
Sent: 28 June 2010 15:33
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Best OCXOs, phasenoise wise.
Wenzel ULN-grade parts and Valpey-Fisher's VFOV110 line come to mind.
There's also a vendor in the UK whose name escapes me who has been advertising ULN-class OCXOs lately (I think someone from there is actually on the list.)
The term "ultra low noise" is common in the XO business, but only a few vendors are serious about competing in that sector.
-- john, KE5FX
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of Luis Cupido
Sent: Monday, June 28, 2010 7:02 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Best OCXOs, phasenoise wise.
I'm quite sure someone has went down this road...
so I better ask first.
Phase noise wise what would be the best OCXO's that we could find
around, taken from equipments, or ebay etc.
I have in mind essentially the HP ones. the PIEZZO ISOTEMP, CMAK,
Vecton(harder to find) and some of the small wenzels, BLIBEY, OACs and
a few more.
Not necessarily just 10MHz... other freqs are of interest too.
Any generic heading info/help?
Many Thanks.
Luis Cupido.
ct1dmk.
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.
Hi
Output frequency matters quite a bit. What is "good phase noise" at 100 MHz isn't going to be very impressive at 10 MHz. Frequency offset also matters. Optimizing for -192 dbc / Hz at 100 KHz offset is a very different thing than trying for -155 dbc / Hz at 10 Hz offset. You are unlikely to find an OCXO that is "real good" both at 10 Hz and at 100KHz.
All that said, the OCXO in the Thunderbolt isn't all that bad for phase noise. Since TBolts are easy to find, so are the OCXO's.
Bob
On Jun 28, 2010, at 10:02 AM, Luis Cupido wrote:
I'm quite sure someone has went down this road...
so I better ask first.
Phase noise wise what would be the best OCXO's that
we could find around, taken from equipments, or ebay
etc.
I have in mind essentially the HP ones. the PIEZZO
ISOTEMP, CMAK, Vecton(harder to find) and some of the small
wenzels, BLIBEY, OACs and a few more.
Not necessarily just 10MHz... other freqs
are of interest too.
Any generic heading info/help?
Many Thanks.
Luis Cupido.
ct1dmk.
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.