Electronics > Projects, Designs, and Technical Stuff
TruePosition GPSDO build question
CJay:
--- Quote from: cdev on January 11, 2019, 02:55:19 am ---Negative VF?
That would really be an amazing feat wouldn't it be, if a signal could be made to emerge from a transmission line before it went in!
"Deja-vu"
--- End quote ---
I seem to remember it was a cable problem that caused time travelling neutrinos to be detected a few years ago, maybe they inadvertently messed up the specifications and bought a reel of cable with negative velocity factor ;)
https://www.livescience.com/16207-faster-light-discovery-time-travel.html
cdev:
I would like some of that magical cable, please!
"One way to think of this is like a mirror, Lloyd said. You send a message to the mirror, and it reflects it back, but so quickly that "past you" is the one who receives it."
cdev:
It always takes longer for the signal to go through the cable than light :-\
(1/n)
Even if its a superconductor. :palm:
texaspyro:
--- Quote from: Squiddaddy on January 11, 2019, 12:39:38 pm ---
Question for @texaspyro, how does LadyHeather know when to drop a satellite off of the list? Does the TruePosition tell you anything in the $SAT messages from the stream?
--- End quote ---
Heather drops any sats with a sig level of 0.
krulls:
Hi - have you published your project details publicly? Reason I ask is I have a True Position board and I tried running the Arduino sketch provided by the Packrats GPS Project people (https://www.packratvhf.com/attachments/article/160/A-Packrat-GPS-Receiver-Project.pdf) and I get nothing but a line of 5x8 pixel blocks on the LCD screen. I haven't received any replies to several emails to the project creators so I'm looking for an alternate solution.
Many thanks,
Steve
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