Hi,
>Like most counters, the 53230A has an ext-ref input. But it is horrible.
And the ref output is even worse.
I had similar issues using the internal ref. output of the Agilent 53230A
(with OCXO option installed) connected to the Ext. ref input of the 33220A.
The frequency synthtized by the 332
ncy measurement
Subject: Re: [time-nuts] Counter Internal Oscillator Importance with
ExternalReference?
Hi Thomas,
About the 53230A -- like many of us I figured there was no point in buying the
expensive OCXO versions since I have plenty of good 10 MHz references around
here. So years ago Keysight l
CERN have flagged another potential issue with the 53230A in that every so
often seemingly randomly communications go hawire.
Bruce
>
> On 10 May 2017 at 04:46 "Richard (Rick) Karlquist"
> wrote:
>
> On 5/9/2017 12:05 AM, Poul-Henning Kamp wrote:
> >
>
> > >
> >
On 5/9/2017 12:05 AM, Poul-Henning Kamp wrote:
I'm sure that modern counters like 53230 are better at this than
The 53230 oven oscillator option in an inferior oscillator to
the 10811, by an order of magnitude. So in this case,
modern != better.
Rick
___
Hi Thomas,
About the 53230A -- like many of us I figured there was no point in buying the
expensive OCXO versions since I have plenty of good 10 MHz references around
here. So years ago Keysight loaned me two of them for a month: one with, and
one without OCXO. Like most counters, the 53230A ha
In message <54ee7bdd-0a49-cc49-540d-2812e70dd...@rubidium.dyndns.org>, Magnus
Danielson writes:
>Wither it is proper side bands or other systematic noise, it is bad
>indeed, [...]
It's more subtle than that, it can be things like thresholds in
the counters trigger being sensitive to th
Hi Poul-Henning,
On 05/09/2017 02:39 PM, Poul-Henning Kamp wrote:
In message <60c74d75-41e5-7112-d8b6-721664b89...@rubidium.dyndns.org>, Magnus
Danielson writes:
Indeed. On the other hand some measurements is hard not to do that way.
One should think about how isolation is created if
Hi,
In HP5370A/B you mux sources. In SR620 there is a lockup PLL, as far as
I remember.
Cheers,
Magnus
On 05/09/2017 01:11 PM, Bob kb8tq wrote:
Hi
If you grab the schematic of pretty much any of these counters, you find a
fairly common approach.
Somewhere inside is a VHF oscillator. The in
In message <60c74d75-41e5-7112-d8b6-721664b89...@rubidium.dyndns.org>, Magnus
Danielson writes:
>Indeed. On the other hand some measurements is hard not to do that way.
>One should think about how isolation is created if needed, and this
>includes AC and DC, common mode and differential
Hi
If you grab the schematic of pretty much any of these counters, you find a
fairly common approach.
Somewhere inside is a VHF oscillator. The internal TCXO, OCXO, or Rb acts as a
phase lock source
for that VHF oscillator. Typical PLL bandwidths are pretty low (10’s of Hz).
When you put in an
Hi,
On 05/09/2017 09:05 AM, Poul-Henning Kamp wrote:
In message , Magnus
Danielson writes:
Also, there is a reason that you can buy different internal oscillators,
this is one of them. For labs with their frequency distribution there is
no need to waste money on stand-alone performan
In message , Magnus
Danielson writes:
>Also, there is a reason that you can buy different internal oscillators,
>this is one of them. For labs with their frequency distribution there is
>no need to waste money on stand-alone performance.
Please don't forget that running the counter of
Hi Tom!
On 05/09/2017 03:02 AM, Tom Knox wrote:
Hi All;
How important is the standard, medium, or high stability reference in counters
like the 53230A, or FCA3120 when locked to an ultra low phase noise external
reference? Particularly when making measurements and adjustments on other ultra
Hi All;
How important is the standard, medium, or high stability reference in counters
like the 53230A, or FCA3120 when locked to an ultra low phase noise external
reference? Particularly when making measurements and adjustments on other ultra
high performance references?
I know Agilent sold 5
easurements i.e. counters.
> The thing looks 1960's to me. Not sure if it is worth 3000 bucks, though.
>
> Kind regards,
> Thomas.
>
>
> Date: Thu, 18 Feb 2016 23:32:09 +0100 (CET)
> From: "iov...@inwind.it"
> To:
> Subject: [time-nuts] Counter?
&
Hi
It depends on just how closely you define the term. Simple answer WWII military
gear for the principle (all glass etc). For the exact dimensions and pin sizes.
Post WWII
TV sets.
Bob
> On Feb 19, 2016, at 2:44 PM, Hal Murray wrote:
>
>
> th.allge...@gmail.com said:
>> An interesting fin
th.allge...@gmail.com said:
> An interesting find, but not as old as advertised: Friesecke & Hoepfner only
> moved to Erlangen-Bruck after WW2, in or around 1949. ...
When were 7 and 9 pin tubes first used?
--
These are my opinions. I hate spam.
i.e. counters.
The thing looks 1960's to me. Not sure if it is worth 3000 bucks, though.
Kind regards,
Thomas.
Date: Thu, 18 Feb 2016 23:32:09 +0100 (CET)
From: "iov...@inwind.it"
To:
Subject: [time-nuts] Counter?
Message-ID:
<1178303383.10543371455834729338.javamail.ht..
This tube type item on ebay is equipped with E1T high speed decade counting
tubes.
222022951573
I'm not affiliated, etc...
Antonio i8iov
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Back from Dayton and found in my mailbox a PLJ-9VFD-A9 digit frequency
counter block. Fresh from eBay. Very nice piece of gear for about $20. It
has a 13 MHz voltage controlled time base marked 1300446 TW 499K. Pin out
seems standard and the Voltage Control on pin 1 simply goes to a (I t
Charles.
On 04/10/2015 09:27 PM, Charles Steinmetz wrote:
The subject of errors in averaging counters at input frequencies near
the clock frequency and its subharmonics and harmonics comes up on the
list from time to time. There is a nice discussion of the phenomenon,
and how it was addressed i
The subject of errors in averaging counters at input frequencies near
the clock frequency and its subharmonics and harmonics comes up on
the list from time to time. There is a nice discussion of the
phenomenon, and how it was addressed in the design of the HP 5345A
counter, in the June, 1974 i
you are happy with.
Bob
- Original Message
> From: Fabio Eboli
> To: Robert LaJeunesse ; Discussion of precise time and
>frequency measurement
> Sent: Tue, January 15, 2013 10:04:37 AM
> Subject: Re: [time-nuts] Counter OCXO behaviour
>
> Robert,
> I asked the
Il 2013-01-15 15:31 David C. Partridge ha scritto:
Yes the 1992 4E adjustment is a bear. Mine behaves pretty much the
same, ISTR it took me a few days to get it adjusted to my
satisfaction
and it was still drifting a bit.
The strange thing is that mine now is changing frequency at
more than 1
Robert,
I asked the seller for the least expensive way to
send that OCXO here (nothing to lose on a marginal
packaging, let's assume the item is non working)
and he quoted 12USD. I think I must refrain
from spending 20USD (assuming I will be the only
bidder) for a device to be dissected, althoug
I
m: Fabio Eboli
> To: Discussion of precise time and frequency measurement
> Sent: Tue, January 15, 2013 9:21:21 AM
> Subject: Re: [time-nuts] Counter OCXO behaviour
>
> By the way, there is a non working unit on ebay
> in US just now, 58h to auction end.
> If it was in EU I
budget.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Fabio Eboli
Sent: 14 January 2013 23:09
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Counter OCXO behaviour
I answer here to all, thank Ed
Il 2013-01-14 22:15 Charles P. Steinmetz ha scritto:
Because the oscillators are sealed assemblies, I'm not aware of
anyone who has taken one apart for analysis -- so the reason for this
behavior must be considered unknown until we know what is going on
inside.
By the way, there is a non worki
Il 2013-01-15 00:08 Fabio Eboli ha scritto:
Trying to be more clear:
10MHz period error (vs. GPS) changed from -0.8x10^-10 soon after
the trim, to +1x10^-10 after two days (top right).
Top right is change of phase in time, i.e. period error
measured using GPS as reference.
The OCXO period w
I answer here to all, thank Ed David and Charles for your thoughts.
David, LOL, you posted the pic of the exact counter in question.
Not a similar unit, I mean it's exactly *that* 1992 that is being
measured ;)
The pictures on eevblog show the early measurements I made with
the counter. One of th
Ed wrote:
Is it manually adjusted right at the oscillator? If so, just opening
it up and sticking a screwdriver in there gives it a thermal shock,
and the adjusted element will have mechanical stress that has to
settle out too - the value can change for a while.
The 04E standard used in the
On Mon, 14 Jan 2013 21:14:23 +0100, Fabio Eboli
wrote:
>Hello,
>recently I tried to trim the Racal Dana
>1992 04E internal reference, using the
>GPS pps as a reference. I'd like to ask
>a pair of questions...
>
>- First is about the method.
>I'm using the counter TI to measure it's
>own OCXO. The
The Racal Dana 1991/1992 OCXO has a big pair of pan head screws
exposed on the back. One is coarse adjust and one is fine adjust. I
have the TCXO version which also exposes the adjustment on the back so
you do not have to open anything to get to it.
You can see them here:
http://www.eevblog.com
Is it manually adjusted right at the oscillator? If so, just opening it
up and sticking a screwdriver in there gives it a thermal shock, and the
adjusted element will have mechanical stress that has to settle out too
- the value can change for a while.
Ed
_
Hello,
recently I tried to trim the Racal Dana
1992 04E internal reference, using the
GPS pps as a reference. I'd like to ask
a pair of questions...
- First is about the method.
I'm using the counter TI to measure it's
own OCXO. The GPS is starting the count,
the internal reference 10MHz (on the
ks, -Don
>
>
>
>
> --**
> From:
> Sent: Monday, December 10, 2012 11:23 AM
> To: "Discussion of precise time and frequency measurement" <
> time-nuts@febo.com>
> Subject: [time-nuts] Counter
>
>
>> Is shipped, tracking
Thanks, Didier, if you ever find a mainframe for it, please keep me in
mind.
Thanks, -Don
--
From:
Sent: Monday, December 10, 2012 11:23 AM
To: "Discussion of precise time and frequency measurement"
Subject: [time-nut
Is shipped, tracking number
1Z30VR960337713831
due Wednesday
Didier
Sent from my Droid Razr 4G LTE wireless tracker.
___
time-nuts mailing list -- time-nuts@febo.com
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and fol
your chosen
> counter architecture and maximum frequency.
>
> regards,
> Fred
>
>
> - Original Message
> From: Bob Bownes
> To: Discussion of precise time and frequency measurement
> Sent: Mon, January 31, 2011 2:26:22 AM
> Subject: Re: [time-nuts] c
s from "too easy" to "tricky", depending on your chosen
counter architecture and maximum frequency.
regards,
Fred
- Original Message
From: Bob Bownes
To: Discussion of precise time and frequency measurement
Sent: Mon, January 31, 2011 2:26:22 AM
Subject: Re: [time-nut
g my own fpga based counter thing.
>
> regards,
> Fred
>
>
>
>
> - Original Message
> From: Don Latham
> To: Discussion of precise time and frequency measurement
> Sent: Mon, January 31, 2011 1:51:45 AM
> Subject: Re: [time-nuts] counter
>
> Th
gt;
> regards,
> Fred
>
>
>
>
> - Original Message
> From: Don Latham
> To: Discussion of precise time and frequency measurement
>
> Sent: Sun, January 30, 2011 6:02:57 PM
> Subject: Re: [time-nuts] counter
>
> Seems right, John. For just
interested. If not, I'll just
keep doing my own fpga based counter thing.
regards,
Fred
- Original Message
From: Don Latham
To: Discussion of precise time and frequency measurement
Sent: Mon, January 31, 2011 1:51:45 AM
Subject: Re: [time-nuts] counter
They look in
regards,
Fred
- Original Message
From: Don Latham
To: Discussion of precise time and frequency measurement
Sent: Sun, January 30, 2011 6:02:57 PM
Subject: Re: [time-nuts] counter
Seems right, John. For just a little more, the other units you recommended
might be better. Still a lot of prog
They look interesting, Tristan. Gee, nobody's "in charge" of this, I'm not
sure it's even a project at this point, and AFIK there's no out of turn
:-). I too like the Arduino, in fact I've settled on them or the Propeller
for projects if I can, so the boards you propose may work just fine.
Don
Tri
Hi Don,
At the risk of speaking out of turn, and not knowing too much about this
project (I'm new here!) have you considered something like these boards:
http://www.gadgetfactory.net/index.php?main_page=index&cPath=1&zenid=d282dce6c5b0acfe45c1377315b2734c
They use the Spartan 3E chips, like alot
Yes, boards and parts, please email me off list.
Stanley
Speaking of PICTIC II's. Great project, but I had originally decided not to go
that route as list members were indicating that 5370Bs were to be picked up for
200 bucks. Not so in France I am afraid. I have not been able to find anythi
bo.com [mailto:time-nuts-boun...@febo.com]On
>> Behalf Of Don Latham
>> Sent: Sunday, January 30, 2011 12:04 AM
>> To: Discussion of precise time and frequency measurement
>> Subject: Re: [time-nuts] counter
>>
>>
>> Would that be FPGAconf? It's still ment
On 1/30/2011 12:33 AM, cook michael wrote:
as list members were indicating that 5370Bs were to be picked up for
200 bucks. Not so in France I am afraid. I have not been able to find
anything under 5 times that over here.
I questioned that, relative to my experience. Miracles do happen, but
Not that the decks are cleared for this project yet. Heck, my picII's
aren't built or programmed.
Speaking of PICTIC II's. Great project, but I had originally decided not
to go that route as list members were indicating that 5370Bs were to be
picked up for 200 bucks. Not so in France I am afr
time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of Don Latham
> Sent: Sunday, January 30, 2011 12:04 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] counter
>
>
> Would that be FPGAconf? It's still mentioned in t
Would that be FPGAconf? It's still mentioned in the documentation and
seems to be a kind of bitfile loader. There's no mention of a requirement
to use it, but it may be necessary. Docs mention Altera or Xilinx packages
and a c++ compiler as necessary.
I just skimmed the document.
Don
> in business
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of Don Latham
> Sent: Saturday, January 29, 2011 11:13 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] counter
>
>
>
Aha. good to know. Do you suppose if we put on our thinking caps we can
get the academic pricing? Would whinging or outright begging do it?
:-)
Not that the decks are cleared for this project yet. Heck, my picII's
aren't built or programmed.
Don
John Miles
>
>>
>> With regard to the home-brew cou
>
> With regard to the home-brew counter project, if it still exists:
>
> >From friend Marcus Leech on another list:
>
> "Don't know whether you've seen these:
>
> http://www.knjn.com/ShopBoards_USB2.html
>
> $79.95 for the low-end board, which includes and FX2, and a small
> Cyclone FPGA. Pretty
With regard to the home-brew counter project, if it still exists:
>From friend Marcus Leech on another list:
"Don't know whether you've seen these:
http://www.knjn.com/ShopBoards_USB2.html
$79.95 for the low-end board, which includes and FX2, and a small
Cyclone FPGA. Pretty good
value."
Th
A cursory look around produced counters and dividers from:
http://www.lsicsi.com
There are probably comparable units available elsewhere. I know that rfbay
has some microwave dividers, and Hittite as well, although Hittite is a
bit expensive.
Don
--
"Neither the voice of authority nor the weigh
Hello Eric,
how much are you asking for the SR620?
thanks,
Said
In a message dated 3/10/2008 12:31:50 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
I have some other Time and frequency stuff for some time nuts, before I
place it on ebay.
A Stanford Research SR620 Time interval coun
Hello,
I have some other Time and frequency stuff for some time nuts, before I place
it on ebay.
A Stanford Research SR620 Time interval counter including option 1 (Oven Osc.)
Well working and timebase adjusted.
A Vectron Crystal Oscillator CO-811B-1 10 MHz is a replacemant for the
HP 10811 Osc
en my experience. Regards - Mike
>
>
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
>
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of WB6BNQ
> Sent: Saturday, December 22, 200
> Mike , this is correct. if you display just under 10Mhz , you have a
> digit better resolution. My counter does the same
>
> The same applies to 1Mhz , 100Mhz , etc . When the counter just has to
> go to the next higher digit, it will loose one digit resolution.
Not if the counter can roll-over
PROTECTED] On
> Behalf Of WB6BNQ
> Sent: Saturday, December 22, 2007 7:00 AM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Counter display resolution
>
> Mike,
>
> Your statement about "counters" is rather general and misleading. Yo
Subject: [time-nuts] Counter display resolution
Mike,
Your statement about "counters" is rather general and misleading. You need
to
explain your comment better.
For instance, are your referring to the input signal or did you mean having
the
internal reference frequency offset from
Mike,
Your statement about "counters" is rather general and misleading. You need to
explain your comment better.
For instance, are your referring to the input signal or did you mean having the
internal reference frequency offset from a standard value ? All the counters I
have do not "auto-scal
Hi fellow time-nuts!
A few days ago I finally received my latest counter, a Wavecrest SIA-3000P.
It's a 3-channel bestie with 1.7 GHz BW on each channel. I have now pulled a
few small tricks and is able to run it with external monitor, mouse and
keyboard. Isn't that hard actually. I just did my fi
e time and frequency measurement
> Subject: [time-nuts] Counter collector
>
>
> Was it on this group that some one was telling about their counter
> collection ?
>
> I have a manual for HP 525B Frequency Converter Unit. This is a plug in
> for the big, tube type HP counter. The
Was it on this group that some one was telling about their counter
collection ?
I have a manual for HP 525B Frequency Converter Unit. This is a plug in
for the big, tube type HP counter. The manual is free for any one that
wants it.
Bill K7NOM
___
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