> Bottom line, the large low-frequency spurs in the FTS plot at 1.4 and 2.9
> Hz
> will be caused by one of these conditions:
>
> 1) A problem with the reference source(s)
>
> 2) A problem with the FTS oscillator itself
>
> 3) A normal characteristic of the FTS oscillator (maybe its spur specs
> w
>
> I've heard and read some documents about using cross-correlation using
> two distinct reference oscillators when trying to measure the phase
> noise from a source to reduce the influence of the reference
> oscillators phase noise.
>
> Unfortunately, it's still not exactly clear to me how it w
>> My guess is that it's a PP2S / "Even Second" output - that would
>> also match with the label...
azelio.bori...@screen.it said:
> OK, so a digital 'scope is needed or, at least, with memory.
We discussed this area a week or three ago.
You don't need a digital scope to determine if there is
If it is, then you should see a pulse every 2 seconds, lined up with the
even seconds in GPS time. This might seem a rather strange signal to
provide, but it's what the IS-95 derived CDMA systems use to trigger the
start of another 100 block signalling frame. It also tends to suggest that
the uni
On 08/03/2012 01:47 AM, Azelio Boriani wrote:
Excuse my pop-up into this topic, just let me try to complete: you
cross-correlate and obtain the most probable samples and then do your phase
noise process on those samples. The cross-correlation is only a filter, a
preprocessor for the samples. Am I
On 08/03/2012 01:36 AM, Azelio Boriani wrote:
OK, to go beyond the simple see-your-resolution, the 535 is needed
Or something similar, its a good help to illustrate the issues.
(and a very very good oscillator, of course).
It's not that good as an oscillator, but you can do some nice tricks
Excuse my pop-up into this topic, just let me try to complete: you
cross-correlate and obtain the most probable samples and then do your phase
noise process on those samples. The cross-correlation is only a filter, a
preprocessor for the samples. Am I on the right way?
On Fri, Aug 3, 2012 at 1:31
OK, to go beyond the simple see-your-resolution, the 535 is needed (and a
very very good oscillator, of course).
On Fri, Aug 3, 2012 at 1:24 AM, Magnus Danielson wrote:
> On 08/03/2012 01:06 AM, Azelio Boriani wrote:
>
>> Not much time ago a length of coaxial cable was enough to test the single
Hi Sylvain,
On 08/02/2012 11:24 PM, Sylvain Munaut wrote:
Hi Magnus,
Thanks a lot for the concise and very clean explanation.
You are welcome!
The cross-correlation part between the two signal was clear enough in
my head but I didn't really see how it would achieve much gain. I
didn't think
On 08/03/2012 01:06 AM, Azelio Boriani wrote:
Not much time ago a length of coaxial cable was enough to test the single
shot resolution of our counters...
The shape of the non-linearity is quite interesting. Among other things
it helps to to understand the interpolator non-linearity and cross-
Not much time ago a length of coaxial cable was enough to test the single
shot resolution of our counters...
On Thu, Aug 2, 2012 at 9:54 PM, Brooke Clarke wrote:
> Hi:
>
> http://www.prc68.com/I/TandFTE.shtml#DG535
> Great instrument.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http
Have you joined and posted your question to the Yahoo Agilent/HP group ?
It is a much bigger group and has been very helpful to me in the past
-pete
On Thu, Aug 2, 2012 at 1:20 PM, Hans Holzach wrote:
>hi all,
>i have a small collection of old HP calculators, with the hp 71b being
>
Hi Magnus,
Thanks a lot for the concise and very clean explanation.
The cross-correlation part between the two signal was clear enough in
my head but I didn't really see how it would achieve much gain. I
didn't think about averaging many resulting spectrum while they're
still complex (and not jus
Hi Sylvain,
On 08/02/2012 09:56 PM, Sylvain Munaut wrote:
Hi,
I've heard and read some documents about using cross-correlation using
two distinct reference oscillators when trying to measure the phase
noise from a source to reduce the influence of the reference
oscillators phase noise.
Unfortu
Hi John,
On 08/02/2012 09:59 PM, John Ackermann N8UR wrote:
Magnus, this is very cool. Can you describe your cross-correlation setup
with the Time-Pod? I'd like to play with it here and compare notes.
1. Unscrew the hardwire jumpers on the input side of the TimePod.
2. Hook up two low (enough
hi all,
i have a small collection of old HP calculators, with the hp 71b being
my favourite. as a watchmaker i thought it might be a good idea to add
a digital clock HP 59309A to my collection. but this cost my quite a
few hours of sleep as i encountered an unexpectd problem that i c
Magnus, this is very cool. Can you describe your cross-correlation
setup with the Time-Pod? I'd like to play with it here and compare notes.
John
On 8/2/2012 12:36 PM, Magnus Danielson wrote:
Fellow time-nuts,
I have borrowed Björn's FTS1200 and OSA8600 and that complements my own
OSA8
Hi,
I've heard and read some documents about using cross-correlation using
two distinct reference oscillators when trying to measure the phase
noise from a source to reduce the influence of the reference
oscillators phase noise.
Unfortunately, it's still not exactly clear to me how it works ...
d
Hi:
http://www.prc68.com/I/TandFTE.shtml#DG535
Great instrument.
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Magnus Danielson wrote:
Fellow time-nuts,
I've finally got the time to unpack and start testing the SRS DG535 delay generator. It's
Fellow time-nuts,
I've finally got the time to unpack and start testing the SRS DG535
delay generator. It's a cool little box which lets me generate 4
different delay signals from a trigger, with a 0 delay output. The nice
thing about this unit is that it allows me to program delays with 5 ps
Hi Tom,
On 08/02/2012 07:48 PM, Tom Knox wrote:
Hi Magnus;
Very Nice
Thanks!
Tom has very kindly provided some seriously good cables, which is being
used for these measures.
The TimePod comes straight out of the hands of the usual suspect John
Miles, as part of out travel to Boulder.
M
On 08/02/2012 06:36 PM, Magnus Danielson wrote:
Fellow time-nuts,
I have borrowed Björn's FTS1200 and OSA8600 and that complements my own
OSA8600 and OSA8601.
I use a HP5087A and one of the OSA8600 as references, such that I can
cross-correlate out the reference oscillators. I'm still not quite
Hi Magnus;
Very Nice
Best Wishes;
Thomas Knox
> Date: Thu, 2 Aug 2012 18:36:31 +0200
> From: mag...@rubidium.dyndns.org
> To: time-nuts@febo.com
> Subject: [time-nuts] FTS1200, OSA8600, OSA8601 phase noise and ADEV measures
>
> Fellow time-nuts,
>
> I have borrowed Björn's FTS1200 and OSA860
Hi Magnus;
Very Nice
Best Wishes;
Thomas Knox
> Date: Thu, 2 Aug 2012 18:36:31 +0200
> From: mag...@rubidium.dyndns.org
> To: time-nuts@febo.com
> Subject: [time-nuts] FTS1200, OSA8600, OSA8601 phase noise and ADEV measures
>
> Fellow time-nuts,
>
> I have borrowed Björn's FTS1200 and OSA860
Fellow time-nuts,
I have borrowed Björn's FTS1200 and OSA8600 and that complements my own
OSA8600 and OSA8601.
I use a HP5087A and one of the OSA8600 as references, such that I can
cross-correlate out the reference oscillators. I'm still not quite
satisfied just yet, so I may need to work so
Azelio Boriani writes:
>
> OK, so a digital 'scope is needed or, at least, with memory.
>
> On Thu, Aug 2, 2012 at 1:12 PM, Peter Bell wrote:
>
> > My guess is that it's a PP2S / "Even Second" output - that would also match
> > with the label...
> >
OK Azelio, good idea, I will check that if
OK, so a digital 'scope is needed or, at least, with memory.
On Thu, Aug 2, 2012 at 1:12 PM, Peter Bell wrote:
> My guess is that it's a PP2S / "Even Second" output - that would also match
> with the label...
>
> On Thu, Aug 2, 2012 at 5:02 PM, Azelio Boriani >wrote:
>
> > OK, it is in the plac
My guess is that it's a PP2S / "Even Second" output - that would also match
with the label...
On Thu, Aug 2, 2012 at 5:02 PM, Azelio Boriani wrote:
> OK, it is in the place of the PPS output... can you hook an oscilloscope
> and see if there is any output?
>
> On Thu, Aug 2, 2012 at 10:25 AM, Chr
OK, it is in the place of the PPS output... can you hook an oscilloscope
and see if there is any output?
On Thu, Aug 2, 2012 at 10:25 AM, Christoph Kopetzky wrote:
> Azelio Boriani writes:
>
> >
> > Why are you assuming this is a protocol or signal label? Maybe a
> > maintenance or repair-by-exc
I'd like to find a spare processor board for the 3586 to play with.
Also I'd like to find the little metal piece that fits over the front panel
between the keyboard area and the display area.
I designed 6800 based comms equipment in the 70s.
Would love to scarf the source code for the 3586.
--
Azelio Boriani writes:
>
> Why are you assuming this is a protocol or signal label? Maybe a
> maintenance or repair-by-exchange indication too.
>
Because the label is above the bnc connector on the back side of the 58503A
beside the bnc connector with an alarm label.
The 58503A has the singl
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