http://rspa.royalsocietypublishing.org/content/royprsa/472/2196/20160404.full.pdf
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On 12/8/16 3:34 PM, Don Latham wrote:
Hi Jim: From a hardware multi drop viewpoint, the CAN Bus seems on paper to be
simplest…
2 120 ohm resistors and a twisted pair…
Don
except no PC has a CAN interface, so debugging is a pain. One advantage
of USB is that pretty much every computer in the
I am pretty sure that I ran across this once as well with the
7800/LM340 series in the early 1980s with parts from a major
manufacturer like Motorola, National, or Texas Instruments; the
regulators ran hot and the output voltages were slightly low no matter
what decoupling arrangements were made at
Hi Jim: From a hardware multi drop viewpoint, the CAN Bus seems on paper to be
simplest…
2 120 ohm resistors and a twisted pair…
Don
> On Dec 8, 2016, at 8:40 AM, jimlux wrote:
>
> On 12/8/16 6:18 AM, John Ackermann N8UR wrote:
>> Hi Luciano --
>>
>> The expanded-channels scenario would use o
On Thu, 8 Dec 2016 02:25:14 +0100, you wrote:
>Am 08.12.2016 um 01:20 schrieb Scott Stobbe:
>> Yes, the short hand I like to use is 4 nV*sqrt(R/1000).
>>
>> 2 nV/rthz off a bandgap is pretty darn impressive, that includes a delta
>> vbe gained up ~10x.
>
>Methinks the advantage comes from converti
Possible, but it should not need that, and the original design didn't include
it.
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray
Sent: Wednesday, December 7, 2016 10:35 PM
To: Discussion of precise time and frequency measurement
Cc: hmur...
HI
Ok, so to fully evaluate the problem, you will need to de-encapsulate the
parts. That *is* the next step
in this adventure. First pass would be to pull the plastic off of a couple of
bad ones and get some pictures
of the die. After that, trace them back and see if they are Brand A or Brand B.
In message , "Van Horn, David" writes:
>I did check the circuit through the whole range that it should
>operate in, based on component data sheets. No issues.
How long are the wires supplying the regulator ?
The LC of the wires inductance and the shunt capacitor over the
regulators inpu
I did check the circuit through the whole range that it should operate in,
based on component data sheets. No issues.
I also carefully varied the voltage right around where the regulator output is,
to see if there was some very narrow band of sensitivity.
Nothing.
-Original Message-
From
On 12/8/16 7:39 AM, timeok wrote:
John,
Ok I know the development job is very hard with a lot of rework and time
spending.
I will try your basic unit but I hope you will develop a "multiboard"
scenario with a single USB to send the real time data to Timelab.
Thank you again to you
Ed wrote:
It would be helpful to give some specific info about the circuit and
regulators used for these experiments, such as operating voltage,
load current, and regulator type.
I concur. It would also be helpful to have more detail about the
phenomenon you are observing (see below).
Also
That's a really nice part, like the old LM723 was bring your own pass
element, the 3042 is essentially bring your own reference, I hope that is a
trend that continues. And a 10uF capacitor is pretty quiet at 1KHz plus.
The other neat thing about the 3042 is the error amplifier is run unity
gain wi
Yes, I hit one of those. I forget the frequency other than around 1 MHz, but it
was pretty warm when it shouldn't have been, and it was several volts amplitude.
This thing I'm chasing is much more subtle.
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
John,
Ok I know the development job is very hard with a lot of rework and time
spending.
I will try your basic unit but I hope you will develop a "multiboard"
scenario with a single USB to send the real time data to Timelab.
Thank you again to you and the group for what you are doing
On 12/8/16 6:18 AM, John Ackermann N8UR wrote:
Hi Luciano --
The expanded-channels scenario would use one TICC/Arduino pair for each
set of channels. It would require much redesign to stack multiple TICCs
on a single Arduino, and I don't think one board would have the power to
handle it.
What
On 12/7/16 9:34 PM, Hal Murray wrote:
kb...@n1k.org said:
the cool thing about those parts is that their PSRR extends
up to several MHz. A lot of LDOs have good PSRR to kHz.
Which to bring it back to noise in radios ….. could be the issue there. The
device isn’t oscillating, it’s just n
Hi Luciano --
The expanded-channels scenario would use one TICC/Arduino pair for each
set of channels. It would require much redesign to stack multiple TICCs
on a single Arduino, and I don't think one board would have the power to
handle it.
What I envisioned would be a set of TICC/Arduinos
Hi Mike,
very good, thanks! That helps a lot...
Best regards,
Matthias
Gesendet: Donnerstag, 08. Dezember 2016 um 14:01 Uhr
Von: "Mike Cook"
An: "Discussion of precise time and frequency measurement"
Betreff: Re: [time-nuts] Knights OCXO: Now in plain text...
> Le 8 déc. 2016 à 10:40, Mat
Hi John,
a question: In the draft operating manual is write is possible to use 2, 4
,6 etc. input using multiple (1,2,3) TICC.
How are connected the extra TICC boards?
Is it possible a single Arduino drive multiple boards or each board is
connected to an Arduino processor?
thanks,
> Le 8 déc. 2016 à 10:40, Matthias Jelen a écrit :
>
> Hello!
>
> 3rd try, I was using a webmailer which changed it defaults to html. Thanks
> for the hint Mike!
>
> I got an OCXO from a piece of scrapped Agilent equipment.
>
> The OCXO has a label on it saying:
>
> CTS KNIGHTS
> 970-21
Hello!
3rd try, I was using a webmailer which changed it defaults to html. Thanks for
the hint Mike!
I got an OCXO from a piece of scrapped Agilent equipment.
The OCXO has a label on it saying:
CTS KNIGHTS
970-2123-2
10.000 MHz
08924-61037
The OCXO has four wires and an RF-Connector, so
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