Hi
There are indeed TCXO’s out there that have exactly the same crystals in them
as OCXO’s (other than the cut angle). They are not super common. AT based
OCXO’s are not as popular as they once were. Large(r) package / high price
TCXO’s also are not what most people go out and buy.
All that
On Wed, 23 Jan 2019 17:31:04 -0500
Bob kb8tq wrote:
> If you take a look at typical TCXO’s and XO’s in a real world environment,
> their noise is higher than a similar
> OCXO even at 100 Hz. If you are cleaning up something like a Rb, your loop
> may well be below 1Hz.
I always assumed,
. Januar 2019 07:45
An: 'Discussion of precise time and frequency measurement'
Betreff: Re: [time-nuts] Good clean-up oscillators
At least one version is available from Mouser for $85.
And I'm sure if I wanted to order one with something slightly
different, Vectron would do it.>
>From my pr
. Januar 2019 07:45
An: 'Discussion of precise time and frequency measurement'
Betreff: Re: [time-nuts] Good clean-up oscillators
At least one version is available from Mouser for $85.
And I'm sure if I wanted to order one with something slightly
different, Vectron would do it.>
>From my pr
On Fri, Jan 25, 2019 at 3:05 PM Bernd Neubig wrote:
> Hi all,
>
> Sorry the URL given below was broken into two lines. In its total it must
> read
>
> https://www.axtal.com/English/Products/OscillatorModules/PhaseLockedOscillat
> orModules/
>
-Ursprüngliche Nachricht-
Von: time-nuts [mailto:time-nuts-boun...@lists.febo.com] Im Auftrag von
Bernd Neubig
Gesendet: Freitag, 25. Januar 2019 07:45
An: 'Discussion of precise time and frequency measurement'
Betreff: Re: [time-nuts] Good clean-up oscillators
>> At least one v
ailto:time-nuts-boun...@lists.febo.com] Im Auftrag von Mark
Goldberg
Gesendet: Donnerstag, 24. Januar 2019 23:16
An: Discussion of precise time and frequency measurement
Betreff: Re: [time-nuts] Good clean-up oscillators
On Thu, Jan 24, 2019 at 2:01 PM jimlux wrote:
>
> At least one version is
On 1/24/19 12:58 PM, jimlux wrote:
On 1/24/19 1:04 AM, Magnus Danielson wrote:
Hi Luciano,
Thanks for that overview, I was kind of looking for something like that
and hoping that someone had some form of overview.
It looks like this is a spec-sheet based investigation. Wonder if we
could
On Thu, Jan 24, 2019 at 2:01 PM jimlux wrote:
>
> At least one version is available from Mouser for $85.
>
> And I'm sure if I wanted to order one with something slightly different,
> Vectron would do it.
>
>
>
>From my previous experience (asking for a custom frequency TCXO) Vectron's
business
On 1/24/19 1:04 AM, Magnus Danielson wrote:
Hi Luciano,
Thanks for that overview, I was kind of looking for something like that
and hoping that someone had some form of overview.
It looks like this is a spec-sheet based investigation. Wonder if we
could collect up a measurement based one.
Poul-Henning Kamp writes:
> The TODO point is to take a RaspBerry Pi, run a tight loop with all
> which wiggles a GPIO pin with all interrupts disabled, and measure
> the phase noise.
You'll quickly find out that the ARM part of the BCM SoC is not fully in
command. The VC4 GPU is calling all the
On 1/23/19 9:22 PM, Richard (Rick) Karlquist wrote:
On 1/23/2019 7:59 PM, jimlux wrote:
My idea was to get an OCXO without the oven (or with the oven
disabled) - the idea was that an OCXO will have high Q for good phase
noise, and I can deal with the frequency shift due to frequency and
uot; time-nuts-boun...@lists.febo.com
>A "Discussion of precise time and frequency measurement"
> time-nuts@lists.febo.com
>Cc
> Data Wed, 23 Jan 2019 21:43:34 +0100
>Oggetto [time-nuts] Good clean-up oscillators
>Fellow time-nuts,
>
>While we of
On Wed, Jan 23, 2019 at 11:00 PM Richard (Rick) Karlquist <
rich...@karlquist.com> wrote:
>
>
> The 10811 brings out oven and oscillator power separately. However,
> if you don't power up the oven, the crystal will be way off frequency
> so your idea is a non-starter.
>
>
Not to go too far off
of precise time and frequency measurement"
time-nuts@lists.febo.com
Cc
Data Wed, 23 Jan 2019 21:43:34 +0100
Oggetto [time-nuts] Good clean-up oscillators
Fellow time-nuts,
While we often look at long-term stability, ADEV etc. we consider
oscillators in their free-running properti
On 1/23/2019 7:59 PM, jimlux wrote:
My idea was to get an OCXO without the oven (or with the oven disabled)
- the idea was that an OCXO will have high Q for good phase noise, and I
can deal with the frequency shift due to frequency and aging in the long
term in other ways
As it happens,
On 1/23/19 12:43 PM, Magnus Danielson wrote:
Fellow time-nuts,
While we often look at long-term stability, ADEV etc. we consider
oscillators in their free-running properties. This is all fine and dany,
but when we want to use an oscillator as a clean-up oscillator, the
servo-loop with
I'm using a Wenzel Phase Lock Oscillator as a "clean up" oscillator for my
Bodnar GPSDO. I lack the capability to measure if it really can do as they
advertise, but the 1 kHz away phase noise is claimed to be in the -170
dBc/Hz range. The ADC noise floor keeps me from measuring anywhere near
that
In message , Magnus Danielson
writes:
>Consider for instance that we have a LPRO rubidium and we want to use a
>clean-up oscillator to provide better phase-noise, what would be a good
>selection?
There are special devices for this, like Vectrons TRU-50, but they
are hard to get hold
Hi
If you take a look at typical TCXO’s and XO’s in a real world environment,
their noise is higher than a similar
OCXO even at 100 Hz. If you are cleaning up something like a Rb, your loop may
well be below 1Hz.
Like everything else, it becomes a “that depends” sort of thing. If your
Fellow time-nuts,
While we often look at long-term stability, ADEV etc. we consider
oscillators in their free-running properties. This is all fine and dany,
but when we want to use an oscillator as a clean-up oscillator, the
servo-loop with surpress much of the low-frequency/high-tau
21 matches
Mail list logo
