Hi
Regarding the manuals,
I must look in my paper archive. I remember to have two manuals of two types of
those "old test sets". I have even one of the test sets in my "museum".
It will take a while to dig, as I am going to travel for 10 days.
I will come back after that.
Regards
Bernd
-Ur
Hello,
on the website of my company you can find a list of papers on the subject of
crystal measurement techniques.
http://www.axtal.com/English/TechnicalNotes/TechnicalArticlesPublications/LiteratureaboutQuartzCrystals/
The actual standard procedure for crystal measurement is by using modern
n
Hi Dave,
the center of the Swiss watch & crystal industry is the small town of Grenchen,
location of many famous watch makers including the SMH group which includes
Microcrystal, previously also Oscilloquartz, and the following wathc brands:
Prestige and Luxury:
Breguet (CH)
Hi Attila,
the paragraph applies also to low phase noise crystal oscillators.
The limiting equation for phase noise stated in that section 3. A. 1. b. 10
reads as follows:
L(F) > -(126+20log10F-20log10f) for 10 Hz ≤ F ≤ 10 kHz
With f being the carrier frequency in MHz and F the offset in Hz
In t
Bob Camp:
>Every paper I have ever read on the intrinsic Q of quartz makes the claim that
>Q * F is a constant ( Q goes up as frequency goes down). Unless blank
>diameter gets in the way, this has been true for any >crystals I have ever
>used. Q does change as overtone changes, but that is not
The same problem may appear on some poorly designed crystal oscillators.
Some circuits depend on the spectral component of a fast power-on and will not
start reliably if the supply voltage is ramped slowly - as can happen if the
oscillator stage is fed by a voltage regulator with high value capac
Tim Shoppa wrote:
>The Pierce logic-gate-biased-active oscillator is pretty reliable to start and
>will oscillate somewhere with most crystals from kHz to MHz.
>As you found out, it will often come up on one of many overtones.
>To reduce chance of coming at an overtone, a series resistor from log
As I recall right "VHF Communications" was the English version of the German
"UKW-Berichte".
I have looked through my collection of the latter magazine back to 2010 and I
could not find that paper in any of the UKW-Berichte issues.
Regards
Bernd
-Ursprüngliche Nachricht-
Von: time-nuts
Alexander Pummer wrote on Montag, 30. Mai 2016 16:25
>KVG Neckarbischofshofen used to have a crystal in a glass envelope, which was
>made just for that purpose it was third overtone crystal ask Bernd if that is
>still available, of course you would need a low noise power amplifier to get
>tha
Hi fellow time-nuts,
sorry for keeping quiet after having dropped my question. I was busy travelling
an since yesterday our booth at the IMS2016/MTT keeps me busy too.
I will answer to the various comments as soon as I got some more quiet minutes.
I look forward to see many time-nuts this afternoo
Hello Fellow time-nuts,
I am looking for a simple solution to discipline my 10 MHz reference OCXO in my
private lab with an 1 PPS signal from a separate GPS receiver.
I am curious if there is a solution possible without programming a
microcontroller, as I am an old-fashioned "analogue" guy ;)
I a
] Get together at IMS?
I think this makes it real easy, let's meet at Bernd's booth at 5 p.m. on
Wednesday. Bring friends.
On Sat, May 21, 2016 at 3:46 AM, Bernd Neubig wrote:
> I will attend the IMS from Tuesday through Thursday noon time. Most
> time I will be at bo
I will attend the IMS from Tuesday through Thursday noon time. Most time I will
be at booth 714 (Dynamic Engineers).
Good proposal to meet at the Industry reception on Wednesday. Please come up
with a proposal for the meeting point, as the hall is big.
Best regards
Bernd DK1AG
-Ursprünglich
Thank you for the congratulations.
I am very pleased to have received this prestigious award named after Walter G.
Cady, the guy who has built the first crystal oscillator in 1921.
Bernd Neubig
-Ursprüngliche Nachricht-
Von: time-nuts [mailto:time-nuts-boun...@febo.com] Im Auftrag von
I will be I will arrive on Monday late afternoon.
Looking forward to meeting you and other Time Nuts soon
Bernd Neubig - DK1AG
AXTAL GmbH & CO. KG
-Ursprüngliche Nachricht-
Von: time-nuts [mailto:time-nuts-boun...@febo.com] Im Auftrag von Magnus
Danielson
Gesendet: Sonntag, 8.
Von: time-nuts [mailto:time-nuts-boun...@febo.com] Im Auftrag von Bob Camp
Gesendet: Mittwoch, 3. Februar 2016 13:12
>There likely are long stories that explain just why this or that package got
>used in this or that application.
The historical reasons for this type of package is more relate
Hello Attila,
I do have the book. Sorry, but I have no time to scan the pages.
Please call me in the QRL
Viele Grüße
Bernd DK1AG
AXTAL GmbH & Co. KG
-Ursprüngliche Nachricht-
Von: time-nuts [mailto:time-nuts-boun...@febo.com] Im Auftrag von Attila Kinali
Gesendet: Dienstag, 2. Februa
Hi Magnus,
I had planned to attend and had even submitted a poster, which was accepted.
However due to time constraints I had to cancel my trip.
Have a nice stay.
Best regards
Bernd DK1AG
AXTAL GmbH & Co. KG
BTW: If you have spare time and we can find a time slot from our side, you
would be w
I have a few similar thermostats, which were sold in the 70ies by KVG Germany
under their P/N XT-1. The manufacturer was Northern Engineering.
The oven comprises an Octal type tube socket, in the interior there are two
sockets for two "HC-6/U" style crystals. The temperature control is by a
bi-m
> the same amplitude.
>
> Cheers,
> Magnus
>
> On 09/10/2014 03:27 PM, Bernd Neubig wrote:
>> Hi Bob,
>>
>> your description oft he spurious coming from higher overtone of
>> low-frequency modes is correct. I want to add, that all thickness-shear mo
Hi Bob,
your description oft he spurious coming from higher overtone of low-frequency
modes is correct. I want to add, that all thickness-shear mode crystals (such
as AT, BT and SC-cut) have so-called an-harmonic spurious modes, which is a
whole ensemble of spurs located slightly above above t
best solution is, as Bob Camp said, to use SAW instead
of BAW.
> Do you know of any commercial quartz crystals (say, in the $1 to $10
> range) that have been optimized for large tempco at room temperature?
> Or optimized for linearity over a large range (e.g., -40 to +40 C)?
As Bernd Neubig
sensing. The thermal resistance in that case is essentially zero.
Bob
On Jul 19, 2014, at 7:45 AM, Attila Kinali wrote:
> On Wed, 25 Jun 2014 14:21:49 +0200
> "Bernd Neubig" wrote:
>
>> the time-nut approach for temperature measurement would be to use a
>> temper
un 2014 14:21:49 +0200
"Bernd Neubig" wrote:
> the time-nut approach for temperature measurement would be to use a
>temperature sensor crystal - like the good old Hewlett-Packard guys did
>many years ago. If you do not look for ultra-linearity of the frequency
>vs.
Hi,
the time-nut approach for temperature measurement would be to use a temperature
sensor crystal - like the good old Hewlett-Packard guys did many years ago.
If you do not look for ultra-linearity of the frequency vs. temp response,
there are several possible types of crystal cuts possible. Th
Hi Attila,
" Unfortunately, since they redesigned their webpages, i cannot find the
OCXOs listed anywhere anymore (only the 8607 shows up)."
Oscilloquartz has discontinued their OCXO line. The only exception is the
BVA OCXO.
Best regards
Bernd DK1AG
www.axtal.com
-Ursprüngliche Nachricht---
ingly.
Regards
Bernd Neubig
DK1AG
www.axtal.com
-Ursprüngliche Nachricht-
Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im
Auftrag von Max Robinson
Gesendet: Freitag, 8. März 2013 04:19
An: Discussion of precise time and frequency measurement
Betreff: Re: [time
rn (just like an AT). Thus the frequency goes down as it warms
up.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bernd Neubig
Sent: Monday, January 28, 2013 11:48 AM
To: 'Discussion of precise time and frequency measurement
Hi,
IT and FC cut crystals are not very often used in OCXO. But if, then the
lower turn point is used (below the inflection temperature), which means
that the cold oven starts at a lower frequency, which increases with warm-up
- same direction as for SC-cut crystals.
Regards
Bernd
DK1AG
-Urs
Hi Ed,
Only now I found this thread , as I was out for several days.
The essentials were already said by others:
The only way to pull the crystal frequency by significantly more than say
100 ppm is to use a series inductor, which will shift the resonance
frequency of the combination L-Xtal downwar
Hi Joe,
I can offer you from our stock at AXTAL the following excellent:
- OCXO 12.8 MHz in 20x20 mm package HCMOS, 5 V, stability +-10 ppb, as our
AXIOM30-50-10, but with reference voltage output of 4 V (instead of 3 V).
Frequency can be tuned by using the VREF.
See www.axtal.com for details
Spe
Don,
There are two papers authored by me on the subject:
1. Comparison of Passive and Active Aging Of SC-Cut and AT-Cut Crystals;
Proceedings IEEE International Frequency Control Symposium
Hawaii May 1996, pp.316-322
2. Correlation of predicted and real aging behaviour; Proc. 11th European
Freque
Morion MV201 OCXO or the Oscilloquartz 8663 to implement a Kalman filter.
On Fri, Aug 24, 2012 at 3:34 PM, Bernd Neubig wrote:
> Hi all,
>
> I have several HP/Agilent frequency counters 53151A (and 53152A) in my
lab.
> Several of them meanwhile show trigger problems.
>
> I have t
Hi all,
I have several HP/Agilent frequency counters 53151A (and 53152A) in my lab.
Several of them meanwhile show trigger problems.
I have tested the A and B channel between 5 MHz and 200 MHZ at three input
levels of -10 dBm, 0 dBm and +10 dBm.
Those with trigger problems show erroneous numbers
forbidden things...
Best regards
Bernd Neubig
Danke,
David
--
SatSignal software - quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
___
time-nuts mailing list -- time-nuts@fe
Hi David,
very similar work was done at PTB in Germany
http://www.ptb.de/en/aktuelles/archiv/presseinfos/pi2012/pitext/pi120301.html
... the charm of forbidden things...
Best regards
Bernd Neubig
AXTAL GmbH & Co. KG
www.axtal.com
- Original Message -
From: "David J Tay
Hi Detlef,
this item is not an OCXO but a TCXO.
Accoding to my memory the stability is +-0.3 ppm over about 0°C to +50°C, it
has 5 V supply and a CMOS/TTL output
You can see the pin connections in the attachment (Option E). The trimmer is 20
kOhm.
I wish you much fun with the part.
Best regards
Hi Jim,
There are different types of TCXO compensation techniques on the market.
Each of them generating a different style of f(T) characterisitcs.
Furthermore the f(T) response varies from unit to unit, because each TCXO is
usually uindividually compensated (or sometimes in groups of similar quar
m. There may
be other vendors too ;-)
Regards
Bernd Neubig DK1AG
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and follow the instructions there.
hort term stability in the range of
seconds and up, that's correct. However OCXO are usually using higher-Q
crystals (overtones, often SC-cuts), while VCXO, TCXO and clocks are mostly
using fundamental mode or "low" overtone crystals.
Bernd Neubig, DK1AG
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED] RETRY
Hi Peter,
I would be interested to get the pics.
Best regards
Bernd
DK1AG
Peter Schmelcher wrote:
> BTW I opened the outer case of my MTI 260 OCXO and took some pictures. They
> are not very interesting but you can see the o
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