On Tue, Oct 15, 2019 at 10:00 PM Hal Murray wrote:
>
>
> You can get a few bits by reducing the tuning range. Suppose you follow
> the
> DAC with an OpAmp with a gain of 1/8 while the reference is adjustable.
> That
> adds 3 bits of resolution by decreasing the output range. The downside is
>
Consistency of the glitch independent of DAC output is more important than its
size. A constant amplitude glitch occurring at the dac update rate is more
benign in its effect than a glitch whose amplitude varies with DAC output.
Brruce
> On 16 October 2019 at 08:02 Attila Kinali wrote:
>
>
>
On Tue, 15 Oct 2019 19:01:37 -0400, time-nuts-requ...@lists.febo.com
wrote:
> --
>
> Message: 2
> Date: Tue, 15 Oct 2019 16:58:42 +0200
> From: Attila Kinali
> To: Discussion of precise time and frequency measurement
>
> Subject: Re: [time-nuts] GPS Antennas
>
On Tue, 15 Oct 2019 18:57:30 +0200
Attila Kinali wrote:
> Assuming
> your OCXO has a tuning range of 1ppm (I've seen 0.1 to 20ppm for OCXOs)
> that would mean you have to controll the EFC voltage better than parts in 1e-9
> or 30 bits. Yes, this is kind of unreallistic, but that's what the
Hoi Tobias,
On Mon, 7 Oct 2019 21:06:37 +
Tobias Pluess wrote:
> I am planning to make a new version of my own GPSDO. I have attached the
> schematic of the OCXO and DAC. Because the stability of my previous design
> was not yet optimal, I now chose better components; my main criteria was
On Tue, 15 Oct 2019 11:29:08 -0500
Bob kb8tq wrote:
> There are a lot of 3D printers out there that happily print ABS ….
I am not sure that's a good idea.
The way how filament printers work will lead to lots of
pores where humidity can accumulate. Not something you want.
Thermoforming sheets,
On 10/15/19 8:17 AM, Attila Kinali wrote:
On 10/15/19 8:17 AM, Attila Kinali wrote:
> On Fri, 6 Sep 2019 10:07:29 -0700
> Nick Sayer via time-nuts wrote:
>
>> I’m late to the party, but my go-to antenna is the Gilsson marine
antenna. If
>> it has a downside, it’s that it has a flat top instead
HP Z3805A Time & Frequency GPS Receiver
by Brooke Clarke
https://www.prc68.com/I/Z3805A.html#OHPGPS
Tim -
Later models of the HP/Symmetricom GPS Time & Frequency models used the
Motorola Oncore 8-channel GPS receivers (VP or UT+ models). Those 8-channel
receivers have same form factor and
Hi
There are a lot of 3D printers out there that happily print ABS ….
Bob
> On Oct 15, 2019, at 10:17 AM, Attila Kinali wrote:
>
> On Fri, 6 Sep 2019 10:07:29 -0700
> Nick Sayer via time-nuts wrote:
>
>> I’m late to the party, but my go-to antenna is the Gilsson marine antenna.
>> If
>>
Hi,
Be careful to trim this to be as balanced as possible, since inbalance
between side-bands allow for linear AM-to-PM conversion.
You could even use a AM-modulated signal and then detect the strength of
the PM/FM signal and tune for minumum leakage. You can also swap the
modulation modes
On Thu, 29 Aug 2019 12:59:06 -0400
Dan Kemppainen wrote:
> For the second summer in a row we were smacked with lightning. So I'm in
> need of a new GPS antenna. Might as well look for one with multi band
> units. I recall some talk about the cheap multi-band units on ebay that
> that are
On Fri, 6 Sep 2019 10:07:29 -0700
Nick Sayer via time-nuts wrote:
> I’m late to the party, but my go-to antenna is the Gilsson marine antenna. If
> it has a downside, it’s that it has a flat top instead of a cone. I’ve got
> one mounted outside at our vacation home near Lake Tahoe, so we’ll
Hoi Jan-Derk,
As I am late to the party, I take the liberty to answer a few mails together
On Sun, 1 Sep 2019 02:09:19 +0200
Jan-Derk Bakker wrote:
> I've been working on a design for a (relatively) simple, standalone
> sampling DMTD. Very rough preliminary schematics can be found at
>
On Sun, 25 Aug 2019 13:59:15 +0200
Gerhard Hoffmann wrote:
> Am 25.08.19 um 10:52 schrieb Hal Murray:
> > att...@kinali.ch said:
> >> As you have always two channels, I would recommend to use two mixers fed
> >> with
> >> an LO that is 90°C out of phase to get I and Q components.
> > How does
On Tue, 17 Sep 2019 07:03:15 -0700
"Richard (Rick) Karlquist" wrote:
> What I was always told was that Rb has low enough noise coming off
> the atoms such that it can use a relatively fast loop to lock
> the OCXO and clean it up. OTOH, the 5071 Cs has to use a very
> long time constant loop to
Ciao Luciano,
On Tue, 13 Aug 2019 20:18:58 +0200
"tim...@timeok.it" wrote:
> I was wondering, and I do it to you too, if this Texas Instruments device
> could be used to build a
>frequency difference meter with high precision features.
>
>http://www.ti.com/lit/ds/symlink/lmx2594.pdf
Good point re the display size, guess I hadn't thought that one through too
well:-)
I'm looking forward to using the FA2 with Lady H but have always run her via a
rackmount PC with desktop monitor, I do have a spare Pi sitting around
somewhere though so perhaps time to be a bit more adventurous
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