On Thu, 3 Feb 2022 18:44:54 -0800, ed breya wrote:
>It seems to all be working OK, except the reported date is slightly off
>- by about twenty years. It says it's 20 Jun 2002. The setup isn't
>optimal - it's just a little GPS antenna propped up against the office
>door glass. It only sees abo
I've been wrapping up the last major sheet metal parts, and found I had
no ground tie in for the box that holds the Z3801A's power supply. This
is the part that holds the PS board cantilevered up over the main board,
in its proper position that's necessarily different from original. The
whole t
Skip,
I’m envious! Fantastic write up, and I look forward to updates. I find it
fascinating that the once-master clock for the DSN was constructed using
techniques familiar—at least for the electronics package—to most amateur radio
folks.
What does the future hold for this unit? Is it going to
Hello Time-Nuts,
I wanted to share what I have been working on for the last year, but
the story is way too long for a single time-nut post.
Tom Van Baak has graciously agreed to host the saga. You can read all
about it at -
http://leapsecond.com/u/skip/Sigma-Tau-MHM-pics.pdf
Enjoy!
Skip Withrow
Erik,
You should be aware that cross-talk of transitions is a factor here. It
"pulls" the transition to the time-base clock.
It can be worth evaluating this by delaying the time-base clock in
controlled manor and measure non-linearity of the time-stamps.
A similar test is done between two i
Hi
Without knowing the ultimate “target use” for this system, it is
very hard to guess what will or will not be a problem.
As an example, lets say we’re “building an engine”:
Ok, engines go into chain saws. Engines go into dump trucks.
Engines also go into airplanes. Some are run in stationary
To prepare for the implementation of dead zone countermeasures I did
some measuring of the dead zone band width versus frequency of the
subharmonic
The test setup use a generator with two outputs, one fixed at 10MHz and
one variable to test the dead zone. The fixed 10MHz was send to one
input o
