On 9/28/14, 7:55 AM, Richard Karlquist wrote:
I find it odd that an instrument that probably cost $50,000 when new did
not have a TCXO as standard, and perhaps an oven as an option.
But I think HP did this sort of thing a lot. Something that would have
cost
very little to add, became an
Hi
On Dec 14, 2014, at 4:14 PM, Jim Lux jim...@earthlink.net wrote:
On 9/28/14, 7:55 AM, Richard Karlquist wrote:
I find it odd that an instrument that probably cost $50,000 when new did
not have a TCXO as standard, and perhaps an oven as an option.
A *lot* of places that had this stuff
September 2014 00:16
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] What sort of oscillator is this?
On 29 Sep 2014 20:06, Hal Murray hmur...@megapathdsl.net wrote:
drkir...@kirkbymicrowave.co.uksaid:
Unfortunately Keysight have now sold
On 30 Sep 2014 08:46, REEVES Paul paul.ree...@uk.thalesgroup.com wrote:
David,
Just a thought but have you tried Pasternack? They do 'custom' precision
cabling including 2.4mm connector options.
regards,
Paul, G8GJA
Hi Paul,
I don't know how good Pasternack are - I have seen some
On 9/30/14, 12:44 AM, REEVES Paul wrote:
David,
Just a thought but have you tried Pasternack? They do 'custom' precision
cabling including 2.4mm connector options.
regards,
Paul, G8GJA
Rather than Pasternack, you might find the following sources useful
Citrus Cables does nice quality,
On 29 September 2014 22:45, Bob Camp kb...@n1k.org wrote:
Hi
The information came from the HP data sheet on the oscillator. They provide
it to the people who manufacture the oscillators for them.
Bob
Can you share the data sheet?
Dave
On Sep 29, 2014, at 1:14 PM, Dr. David Kirkby
On 30 Sep 2014 14:16, Jim Lux jim...@earthlink.net wrote:
On 9/30/14, 12:44 AM, REEVES Paul wrote:
David,
Just a thought but have you tried Pasternack? They do 'custom' precision
cabling including 2.4mm connector options.
regards,
Paul, G8GJA
Rather than Pasternack, you might find
On 9/30/14, 4:56 PM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
On 30 Sep 2014 14:16, Jim Lux jim...@earthlink.net wrote:
On 9/30/14, 12:44 AM, REEVES Paul wrote:
David,
Just a thought but have you tried Pasternack? They do 'custom' precision
cabling including 2.4mm connector options.
It is a low end OCXO - uses AT cut crystal. 15V @ 300 mA. Warm-up time is
6 minutes max for .1 ppm. Other specs as indicated in previous emails.
Has NO EFC.
BR
On Sun, Sep 28, 2014 at 7:26 PM, Tom Van Baak t...@leapsecond.com wrote:
There were two responses to Dave's question (TCXO and
On 29 Sep 2014 17:58, Bob Raker bob.ra...@gmail.com wrote:
It is a low end OCXO - uses AT cut crystal. 15V @ 300 mA. Warm-up time
is
6 minutes max for .1 ppm. Other specs as indicated in previous emails.
Has NO EFC.
Where do you get this information from?
I think I am going to take the
drkir...@kirkbymicrowave.co.uk said:
Unfortunately Keysight have now sold all the cables, but do have the front
panel overlay which is arguably the most critical item.
Spending £500 on 5 cables and a front panel overly is more attractive than
spending £8000 on an upgrading the model.
For
Hi
The information came from the HP data sheet on the oscillator. They provide it
to the people who manufacture the oscillators for them.
Bob
On Sep 29, 2014, at 1:14 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 29 Sep 2014 17:58, Bob Raker
On 29 Sep 2014 20:06, Hal Murray hmur...@megapathdsl.net wrote:
drkir...@kirkbymicrowave.co.uksaid:
Unfortunately Keysight have now sold all the cables, but do have the
front
panel overlay which is arguably the most critical item.
Spending £500 on 5 cables and a front panel overly is more
On 28 Sep 2014 03:11, Alexander Pummer alex...@ieee.org wrote:
that is most likelly a TXCO, what is in the user's manual about warm up
time?
Two people responded - one says a OCXO and the other an TCXO!!
The warmup time is I think an hour, but clearly that is not the time for
an oven to warm
drkir...@kirkbymicrowave.co.uk said:
Two people responded - one says a OCXO and the other an TCXO!!
The warmup time is I think an hour, but clearly that is not the time for an
oven to warm up.
An hour seems like a reasonable OCXO warm-up time to me. You might get
faster warm-up times, but
The temperature stability and warm-up time imply an OCXO. 0.05ppm over
0-55C is at the limit of what can be achieved with a TCXO but they do
not have a long warm-up time. It would be expensive and only would be
used if warm-up time was critical. The HP high-stability options are
(almost?)
I find it odd that an instrument that probably cost $50,000 when new
did
not have a TCXO as standard, and perhaps an oven as an option.
But I think HP did this sort of thing a lot. Something that would have
cost
very little to add, became an expensive option. In some cases these
expensive
On 28 September 2014 15:52, David McGaw n1...@dartmouth.edu wrote:
The temperature stability and warm-up time imply an OCXO. 0.05ppm over
0-55C is at the limit of what can be achieved with a TCXO but they do not
have a long warm-up time. It would be expensive and only would be used if
On 28/09/2014 17:44, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
BTW, you may note Keysight's uncertainty for measurement of the 10 MHz
reference in September 2014 is 0.0010 Hz, whereas Agilent's was
0.00080 Hz in August 2013. They 5071A primary frequency standard. I
assume the fact that the
Hal,
An ocxo has two effects that cause a frequency change after power on: heater
stabilization and crystal retrace.
Heaters usually stabilize quickly (1 - 2 minutes for DIP-14 ocxo, 7 to 10
minutes for typical eurocan docxo's) and then a. ~30 minutes soak until the
ocxo starts following
Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, September 28, 2014 4:57 AM
Subject: Re: [time-nuts] What sort of oscillator is this?
On 28 Sep 2014 03:11, Alexander Pummer alex...@ieee.org
On 28 September 2014 19:37, Tom Miller tmiller11...@verizon.net wrote:
Looks like I am having crow for lunch today. I did find the 1D5
installation instructions and at first it looked like the standard OCXO
package used in many HP instruments. But some closer reading shows that it
may in fact
There were two responses to Dave's question (TCXO and OCXO) and perhaps neither
is correct. I don't have a 8720D VNA myself and Dave wisely doesn't want to
spoil his calibration seals by opening up his instrument to take a look inside.
So here's my guess based on the clues.
Agilent 8719D,
measurement
time-nuts@febo.com
Sent: Sunday, September 28, 2014 7:26 PM
Subject: Re: [time-nuts] What sort of oscillator is this?
There were two responses to Dave's question (TCXO and OCXO) and perhaps
neither is correct. I don't have a 8720D VNA myself and Dave wisely doesn't
want to spoil
On 29 Sep 2014 02:05, Tom Miller tmiller11...@verizon.net wrote:
Dave, do you have access to a good counter?
Not really.
I have an HP 7 modular measurement system, which has all the bits for
a 22 GHz spectrum analyzer. The analyzer has a frequency counter mode, but
I have not written any
On 29 Sep 2014 00:27, Tom Van Baak t...@leapsecond.com wrote:
The next clue is the attached photo found at:
Agilent 08753-60158 Opt. 1D5 for 8753D/E/ES
http://www.ebay.com/itm/151256172424
Note that is for an 8753 (3/6 GHz) series VNA, not the 8719/20/22, which
are 13.5, 20 and 40 GHz
There's also this installation note:
http://literature.cdn.keysight.com/litweb/pdf/08720-90318.pdf
Bob - AE6RV
On 09/28/2014 06:26 PM, Tom Van Baak wrote:
There were two responses to Dave's question (TCXO and OCXO) and perhaps neither
is correct. I don't have a 8720D VNA myself and Dave
, September 28, 2014 9:43 PM
Subject: Re: [time-nuts] What sort of oscillator is this?
On 29 Sep 2014 02:05, Tom Miller tmiller11...@verizon.net wrote:
Dave, do you have access to a good counter?
Not really.
I have an HP 7 modular measurement system, which has all the bits for
a 22 GHz spectrum
The 10 MHz high stability oscillator (option 1D5) in my HP 8720D VNA
has the following specs
Stability
0 to 55 deg C, +-/ 0.05 ppm
Aging per year +/- 0.5 ppm
What sort of oscillator is this likely to be - TCXO or OCXO?
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office:
OCXO
- Original Message -
From: Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Saturday, September 27, 2014 5:36 PM
Subject: [time-nuts] What sort of oscillator is this?
The 10
that is most likelly a TXCO, what is in the user's manual about warm up
time? if they have a special precise reference -- like for spectrum
analyzer or frequency counter that would have at least one magnitude
better stability and would have OXCO,a good OXCO like the Milliren 260
series or the
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