http://www.navcen.uscg.gov/?Do=constellationStatus
http://www.gps.gov/systems/gps/space/
IIRC: 6 planes, 6 slots each, so 36 to cover the sphere, and the GPS
aperture is big (high orbits) so guess up to 1/2 of the constellation could
ever be in view (... yeah, right): 18?
On Thu, Jul 9, 2015 at
John,
That's interesting to me. What exactly are the actual structural limitations of
[that] pic?
-CH
On Jul 24, 2012, at 7:55, John Ackermann N8UR j...@febo.com wrote:
Unfortunately, the TAPR T2-Mini divider
(http://www.tapr.org/kits_t2-mini.html) can't quite get to 1 MHz from 10 MHz
by a make-shift cubicle with walls of HP and
Marconi gear in various states... and a sweet, aged, bearded geek with
trifocals...
It's telling, I think, that the first FMS was built on an Apple II.
-CH
Chris Hoffman
cq.k...@gmail.com
http://ar.ctur.us
On Jul 18, 2012, at 7:00 PM, Richard H
the uC.
-CH
Chris Hoffman
cq.k...@gmail.com
http://ar.ctur.us
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How about a couple of buffers for counting external (opto-isolated) pulses or
sines? A 1 to 5Vpp range might do it, maybe with a sensitivity north of 100MHz?
-CH
Chris Hoffman
cq.k...@gmail.com
http://ar.ctur.us
On Jul 19, 2012, at 12:15 AM, saidj...@aol.com wrote:
Hello everyone
an RS485 line receiver like
the ST3485, MAX483, ADM485. They are actually transceivers so they must be
tied permanently in RX. Since they are differential you can also put a 1:1
(or a 1:4 to raise the level) transformer to isolate the input too.
On Thu, Jul 19, 2012 at 6:03 PM, Chris Hoffman cq.k
on this.
Sorry to say how you search is equally a good question.
On Thu, Jul 19, 2012 at 3:19 PM, Chris Hoffman, KG6O cq.k...@gmail.comwrote:
Thank you, Azelio! I don't suppose there's an impromptu FAQ page out
there, is there?
-CH
On Jul 19, 2012, at 11:58, Azelio Boriani azelio.bori
on this.
Sorry to say how you search is equally a good question.
On Thu, Jul 19, 2012 at 3:19 PM, Chris Hoffman, KG6Ocq.k...@gmail.comwrote:
Thank you, Azelio! I don't suppose there's an impromptu FAQ page out
there, is there?
-CH
On Jul 19, 2012, at 11:58, Azelio Borianiazelio.bori
Ah! The very height of elegance in a good design [imho] : no upgrade needed.
-CH
On Jul 19, 2012, at 12:40, Magnus Danielson mag...@rubidium.dyndns.org wrote:
On 07/19/2012 05:48 PM, Chris Hoffman wrote:
Richard,
This paper is fascinating to me. I finally understand how the TMDE/Metrology
constellation.
On Mon, Jul 16, 2012 at 11:59 PM, Chris Hoffman cq.k...@gmail.com wrote:
All,
Though somewhat outmoded, looking forward to starting my own time shop
with two XL-DC controllers that I have been lucky enough to pick up
recently.
My question: Do I really need to invest
What advice does anyone have on building/finding cheap [visual?] comparison
devices to display or detect a timing [lesajo?] from my 10MHz sine wave ports?
Further, what timing/health metrics could/should I be aware of and/or looking
for?
I do not want to spend good money on another
is
implemented, but it appears roughly equivalent). Do you have any examples I
should be looking for?
-CH
Chris Hoffman
cq.k...@gmail.com
http://ar.ctur.us
On Jul 17, 2012, at 11:51 AM, MSproul wrote:
On Jul 17, 2012, at 11:09 AM, Chris Hoffman, KG6O wrote:
What advice does anyone have
Hoffman
cq.k...@gmail.com
http://ar.ctur.us
-CH
Chris Hoffman
cq.k...@gmail.com
http://ar.ctur.us
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