| Electronics > Projects, Designs, and Technical Stuff |
| TruePosition GPSDO build question |
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| 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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