Hi,
On 2020-01-17 22:09, Skip Withrow wrote:
> Hello Time-Nuts,
>
> I appreciate all the kind remarks regarding yesterday's post.
>
> Today the maser was tested on each of the attached power supplies and
> on battery power. Unit stayed lit and locked, and the alarm went off
> when on just
Hi Skip,
On 2020-01-17 01:41, Skip Withrow wrote:
> Congratulations to Magnus on his new toy.
Thanks!
>
> I would like to relate my recent hydrogen maser experience. Hope you
> enjoy the story.
Oh yes.
>
> Probably about a year ago I was introduced to Dave Howe at NIST. Last
> fall at a hamfest
May be worth going over the board carefully with a loupe or microscope. FPGA
could be fine but a input and some discrete components may be telling the FPGA
to not turn on the pps, or dragging one of the inputs or outputs down to
ground. Too bad there wasn't at least a block diagram available,
Hello Time-Nuts,
I appreciate all the kind remarks regarding yesterday's post.
Today the maser was tested on each of the attached power supplies and
on battery power. Unit stayed lit and locked, and the alarm went off
when on just battery. So, all the covers were replaced and the
readings
On Fri, 17 Jan 2020 11:23:36 +0100
Magnus Danielson wrote:
> > Yes, and that's exactly the problem.
> > To expand a little bit: Noise down-folding comes to be, when
> > a signal with harmonic content passes through a non-linear element.
> > Then, this element acts as kind of a mixer on the
Hi, does anyone have an atomic clock (Rb or Cs) module for sale in the UK
please?
thanks, Andre
Note: A not working (ie low lamp voltage) one at a good price may be acceptable.
Its actually to calibrate my meters as it seems a lot of the cheaper ones even
though initially calibrated aren't
Hi
There are no schematics for the TBolt. This is pretty typical of modern
devices from a number of outfits. From doing a bit of basic circuit
tracing, most of the “stuff” heads into or comes out of the FPGA or MCU.
Once you get past the basic interface chip you probably are looking at an
Hi,
On 2020-01-17 10:32, Attila Kinali wrote:
> On Thu, 16 Jan 2020 12:24:30 -0500
> Bob kb8tq wrote:
>
>>> Another trick you can employ is to pass the LO through a limiting
>>> amplifier. The idea is that the main contributor to noise in a
>>> diode ring mixer is the noise (or uncertainty) of
On Thu, 16 Jan 2020 12:24:30 -0500
Bob kb8tq wrote:
> > Another trick you can employ is to pass the LO through a limiting
> > amplifier. The idea is that the main contributor to noise in a
> > diode ring mixer is the noise (or uncertainty) of switching delay
> > of the diodes (which is not
